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Document and Entity Information - shares	9 Months Ended
Document and Entity Information - shares	Sep. 30, 2018	Oct. 26, 2018
Document and Entity Information [Abstract]
Entity Registrant Name	Emergent BioSolutions Inc.
Entity Central Index Key	0001367644
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Ex Transition Period	false
Entity Common Stock, Shares Outstanding		50,945,056
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q3

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 339,358	$ 178,292
Restricted cash	1,043	1,043
Accounts receivable	76,955	143,653
Inventories	125,745	142,812
Income tax receivable, net	0	2,432
Prepaid expenses and other current assets	20,047	17,157
Total current assets	563,148	485,389
Property, plant and equipment, net	435,075	407,210
Intangible assets, net	107,861	119,597
Goodwill	49,130	49,130
Deferred tax assets, net	12,652	2,834
Other assets	5,757	6,046
Total assets	1,173,623	1,070,206
Current liabilities:
Accounts payable	38,874	41,751
Accrued expenses and other current liabilities	7,425	4,831
Accrued compensation	41,807	37,882
Contingent consideration, current portion	2,954	2,372
Income taxes payable, net	164	0
Deferred revenue, current portion	10,790	13,232
Total current liabilities	102,014	100,068
Contingent consideration, net of current portion	9,003	9,902
Long-term indebtedness	13,495	13,457
Income taxes payable	12,500	12,500
Deferred revenue, net of current portion	65,343	17,259
Other liabilities	4,619	4,675
Total liabilities	206,974	157,861
Stockholders' equity:
Preferred stock, $0.001 par value; 15,000,000 shares authorized, 0 shares issued and outstanding at both September 30, 2018 and December 31, 2017	0	0
Common stock, $0.001 par value; 200,000,000 shares authorized, 51,403,585 shares issued and 50,186,299 shares outstanding at September 30, 2018; 50,619,808 shares issued and 49,405,365 shares outstanding at December 31, 2017	51	50
Treasury stock, at cost, 1,217,286 and 1,214,443 common shares at September 30, 2018 and December 31, 2017, respectively	(39,642)	(39,497)
Additional paid-in capital	640,178	618,416
Accumulated other comprehensive loss	(4,666)	(3,698)
Retained earnings	370,728	337,074
Total stockholders' equity	966,649	912,345
Total liabilities and stockholders' equity	$ 1,173,623	$ 1,070,206

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - $ / shares	Sep. 30, 2018	Dec. 31, 2017
Stockholders' equity:
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized (in shares)	15,000,000	15,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	200,000,000	200,000,000
Common stock, shares issued (in shares)	51,403,585	50,619,808
Common stock, shares outstanding (in shares)	50,186,299	49,405,365
Treasury stock ( in shares)	1,217,286	1,214,443

Condensed Consolidated Statements of Operations (Unaudited) - USD ($)
$ in Thousands

3 Months Ended

9 Months Ended

Sep. 30, 2018

Sep. 30, 2017

Sep. 30, 2018

Sep. 30, 2017

Revenues:

Total revenues

$ 173,653

$ 149,434

$ 511,667

$ 367,064

Operating expenses:

Cost of product sales and contract manufacturing

73,232

44,503

220,449

125,449

Research and development

37,006

22,659

90,802

68,886

Selling, general and administrative

42,105

34,503

121,815

101,521

Income from operations

21,310

47,769

78,601

71,208

Other income (expense):

Interest income

701

637

1,229

1,593

Interest expense

(642)

(1,991)

(1,884)

(5,734)

Other income (expense), net

190

(101)

(387)

Total other income (expense), net

249

(1,455)

(644)

(4,528)

Income before provision for income taxes

21,559

46,314

77,957

66,680

Provision for income taxes

614

12,763

11,776

18,028

Net income

$ 20,945

$ 33,551

$ 66,181

$ 48,652

Net income per share - basic (in dollars per share)

$ 0.42

$ 0.81

$ 1.33

$ 1.19

Net income per share - diluted (in dollars per share)

^[1]

$ 0.41

$ 0.68

$ 1.29

$ 1.03

Weighted-average number of shares - basic (in shares)

50,071,632

41,222,504

49,851,082

40,989,813

Weighted-average number of shares - diluted (in shares)

51,486,996

50,467,829

51,189,680

50,090,088

Product Sales [Member]

Revenues:

Total revenues

$ 133,269

$ 114,296

$ 389,115

$ 259,875

Contract Manufacturing [Member]

Revenues:

Total revenues

22,172

18,912

71,963

52,700

Contracts and Grants [Member]

Revenues:

Total revenues

$ 18,212

$ 16,226

$ 50,589

$ 54,489

[1]	See "Earnings per share" footnote for details on calculation.

Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Condensed Consolidated Statements of Comprehensive Income [Abstract]
Net income	$ 20,945	$ 33,551	$ 66,181	$ 48,652
Foreign currency translations, net of tax	(250)	(296)	(968)	516
Comprehensive income	$ 20,695	$ 33,255	$ 65,213	$ 49,168

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References + Details

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands

9 Months Ended

Sep. 30, 2018

Sep. 30, 2017

Cash flows from operating activities:

Net income

$ 66,181

$ 48,652

Adjustments to reconcile to net cash provided by (used in) operating activities:

Stock-based compensation expense

16,664

11,805

Depreciation and amortization

37,106

29,899

Income taxes

12,761

18,618

Change in fair value of contingent obligations

1,917

1,350

Other

1,515

703

Changes in operating assets and liabilities:

Accounts receivable

66,455

9,411

Inventories

17,067

5,113

Income taxes

(10,130)

(5,515)

Prepaid expenses and other assets

(5,921)

(2,157)

Accounts payable

(5,695)

2,965

Accrued expenses and other liabilities

2,457

(2,334)

Accrued compensation

3,925

(1,902)

Deferred revenue

3,262

14,006

Net cash provided by operating activities

207,564

130,614

Cash flows from investing activities:

Purchases of property, plant and equipment and other

(51,275)

(42,381)

Proceeds from sale of assets

2,624

Net cash used in investing activities

(48,651)

(42,381)

Cash flows from financing activities:

Issuance of common stock upon exercise of stock options

11,402

10,799

Debt issuance costs

(1,426)

Taxes paid on behalf of employees for equity activity

(6,303)

(4,184)

Payments of notes payable to Aptevo

(20,000)

Contingent consideration payments

(2,234)

(2,744)

Restricted cash

(1,043)

Purchase of treasury stock

(145)

(83)

Net cash provided by (used in) financing activities

2,720

(18,681)

Effect of exchange rate changes on cash, cash equivalents and restricted cash

(567)

(74)

Net increase in cash, cash equivalents and restricted cash

161,066

69,478

Cash, cash equivalents and restricted cash at beginning of period

179,335

^[1]

271,513

Cash, cash equivalents and restricted cash at end of period

$ 340,401

^[1]

$ 340,991

[1]	As of December 31, 2017 and September 30, 2018, the balance includes $1,043 of restricted cash.

Condensed Consolidated Statements of Cash Flows (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Condensed Consolidated Statements of Cash Flows (Unaudited) [Abstract]
Restricted cash	$ 1,043	$ 1,043

Condensed Consolidated Statement of Changes in Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	$0.001 Par Value Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Loss [Member]	Retained Earnings [Member]	Total
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adoption of new accounting standard (ASC 606), net of tax \| ASC 606 [Member]					$ (32,527)	$ (32,527)
Balance at Dec. 31, 2017	$ 50	$ 618,416	$ (39,497)	$ (3,698)	337,074	912,345
Balance (ASC 606 [Member]) at Dec. 31, 2017	$ 50	618,416	$ (39,497)	(3,698)	304,547	$ 879,818
Balance (in shares) at Dec. 31, 2017	50,619,808		(1,214,443)			49,405,365
Balance (in shares) (ASC 606 [Member]) at Dec. 31, 2017	50,619,808		(1,214,443)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Employee equity plans activity	$ 1	21,762				$ 21,763
Employee equity plans activity (in shares)	783,777
Treasury stock			$ (145)			(145)
Treasury stock (in shares)			(2,843)
Net income					66,181	66,181
Foreign currency translations, net of tax				(968)		(968)
Balance at Sep. 30, 2018	$ 51	$ 640,178	$ (39,642)	$ (4,666)	$ 370,728	$ 966,649
Balance (in shares) at Sep. 30, 2018	51,403,585		(1,217,286)			50,186,299

Condensed Consolidated Statement of Changes in Stockholders' Equity (Unaudited) (Parenthetical) - $ / shares	Sep. 30, 2018	Dec. 31, 2017
Condensed Consolidated Statement of Changes in Stockholders' Equity [Abstract]
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001

Summary of significant accounting policies	9 Months Ended
Summary of significant accounting policies	Sep. 30, 2018
Summary of significant accounting policies [Abstract]
Summary of significant accounting policies	1. Summary of significant accounting policies Basis of presentation and consolidation The accompanying unaudited condensed consolidated financial statements include the accounts of Emergent BioSolutions Inc. ("Emergent" or the "Company") and its wholly owned and majority owned subsidiaries. All significant intercompany accounts and transactions have been eliminated in consolidation. The unaudited consolidated financial statements included herein have been prepared in accordance with U.S. generally accepted accounting principles for interim financial information and in accordance with the instructions to Form 10-Q and Article 10 of Regulation S-X issued by the Securities and Exchange Commission ("SEC"). Certain information and footnote disclosures normally included in consolidated financial statements prepared in accordance with U.S. generally accepted accounting principles have been condensed or omitted pursuant to such rules and regulations. These consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto contained in the Company's Annual Report on Form 10-K for the year ended December 31, 2017, as filed with the SEC. In the opinion of the Company's management, any adjustments contained in the accompanying unaudited condensed consolidated financial statements are of a normal recurring nature and are necessary to present fairly the financial position of the Company as of September 30, 2018. Interim results are not necessarily indicative of results that may be expected for any other interim period or for an entire year. Significant accounting policies During the nine months ended September 30, 2018, there have been no significant changes to the Company's summary of significant accounting policies contained in the Company's Annual Report on Form 10-K for the year ended December 31, 2017, as filed with the SEC, except for the new revenue recognition standard the Company adopted effective January 1, 2018. See Note 2. "Revenue recognition" for further details. Recently issued accounting standards Recently Adopted ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments In August 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standard Update ("ASU") 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments ("ASU 2016-15"). ASU 2016-15 eliminates the diversity in practice related to the classification of certain cash receipts and payments for debt prepayments or extinguishment costs, the maturing of a zero-coupon bond, the settlement of contingent liabilities arising from a business combination, proceeds from insurance settlements, distributions from certain equity method investees and beneficial interests obtained in a financial asset securitization. ASU 2016-15 designates the appropriate cash flow classification, including requirements to allocate certain components of these cash receipts and payments among operating, investing and financing activities. The Company adopted the new standard effective January 1, 2018 and has determined the impact of ASU No. 2016-15 on its condensed consolidated financial statements will be related to the settlement of contingent liabilities arising from a business combination. ASU 2016-18, Restricted Cash (Topic 230): Statement of Cash Flows In November 2016, the FASB issued ASU 2016-18, Restricted Cash (Topic 230): Statement of Cash Flows ("ASU 2016-18"). ASU 2016-18 requires that a statement of cash flows explain the change during the period in the total of cash, cash equivalents and amounts generally described as restricted cash or restricted cash equivalents. Restricted cash and restricted cash equivalents will be included with cash and cash equivalents when reconciling the beginning of period and end of period balances on the statement of cash flows upon adoption of this standard. The Company adopted the new standard effective January 1, 2018. Restricted cash primarily consists of collateralized cash for a standby letter of credit and guarantee arrangement with a bank. ASU No. 2017-09, Compensation-Stock Compensation (Topic 718): Scope of Modification Accounting In May 2017, the FASB issued ASU 2017-09, Compensation-Stock Compensation (Topic 718): Scope of Modification Accounting ("ASU 2017-09"). ASU 2017-09 clarifies which changes to the terms or conditions of a share-based payment award require an entity to apply modification accounting in Topic 718. The Company adopted the new standard effective January 1, 2018, which did not have a material impact on its condensed consolidated financial statements. ASU No. 2018-07, Compensation-Stock Compensation (Topic 718): Improvements to Nonemployee Share-based Payment Accounting In June 2018, the FASB issued ASU 2018-07, Compensation-Stock Compensation (Topic 718): Improvements to Nonemployee Share-based Payment Accounting ("ASU 2018-07"). ASU 2018-07 expands the scope of Topic 718 to include share-based payments issued to nonemployees for goods and services. ASU No. 2018-07 is intended to reduce cost and complexity and to improve financial reporting for share-based payments issued to nonemployees (for example, service providers, external legal counsel, suppliers, etc.). The standard will be effective after December 15, 2018 for the Company, with early adoption permitted, but no earlier than the Company's adoption date of Topic 606. The Company early adopted the new standard effective April 1, 2018. The adoption of this standard did not have a material impact on the Company's condensed consolidated financial statements. Not Yet Adopted ASU 2016-02, Leases (Topic 842) In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) ("ASU 2016-02"). ASU 2016-02 increases transparency and comparability among organizations by requiring the recognition of lease assets and lease liabilities on the balance sheet and disclosure of key information about leasing arrangements for both lessees and lessors. The standard will be effective January 1, 2019, with early adoption permitted. The standard will be applied using a modified retrospective approach to the beginning of the earliest period presented in the financial statements. The Company's adoption efforts are primarily focused on the review of its existing lease contracts, identification of other contracts that may fall under the scope of the new guidance and performing a gap analysis on the current state of lease-related activities compared with the future state of lease-related activities. The Company has identified the lease agreements that will be impacted by the new standard and is currently evaluating the overall impact on its condensed consolidated financial statements and related disclosures. ASU 2016-16, Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory In October 2016, the FASB issued ASU 2016-16, Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory ("ASU 2016-16"). ASU 2016-16 improves the accounting for the income tax consequences of intra-entity transfers of assets other than inventory. The new standard will require entities to recognize the income tax consequences of an intra-entity transfer of a non-inventory asset when the transfer occurs. The guidance is effective for fiscal years beginning after December 15, 2017, and early adoption is permitted. The Company is currently evaluating the effects of adopting ASU 2016-16 on its condensed consolidated financial statements but the adoption is not expected to have a significant impact as of the filing of this report. ASU 2017-04, Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment In January 2017, the FASB issued ASU 2017-04, Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment ("ASU 2017-04"). ASU 2017-04 simplifies the subsequent measurement of goodwill and eliminates Step 2 from the goodwill impairment test. ASU 2017-04 is effective for annual and interim goodwill tests beginning after December 15, 2019. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates on or after January 1, 2017. The Company is currently evaluating the impact that the adoption of this standard will have on its condensed consolidated financial statements. ASU 2018-02, Income Statement—Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income In February 2018, the FASB issued ASU 2018-02, Income Statement—Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income ("ASU 2018-02"). ASU 2018-02 provides the option to reclassify certain income tax effects related to the Tax Cuts and Jobs Act passed in December of 2017 between accumulated other comprehensive income and retained earnings and also requires additional disclosures. ASU 2018-02 is effective for all entities for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years, with early adoption permitted. Adoption of ASU 2018-02 is to be applied either in the period of adoption or retrospectively to each period in which the effect of the change in the tax laws or rates were recognized. The Company is currently evaluating the impact of adopting ASU 2018-02 on its condensed consolidated financial statements. ASU 2018-11, Leases (Topic 842): Targeted Improvements In July 2018, the FASB issued ASU 2018-11, Leases (Topic 842): Targeted Improvements ("ASU 2018-11"). In issuing ASU 2018-11, the FASB decided to provide another transition method in addition to the existing transition method by allowing entities to initially apply the new leases standard at the adoption date and recognize a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption. The Company is currently evaluating the impact that ASU 2016-02 and ASU 2018-11 will have on its condensed consolidated financial statements. There are no other recently issued accounting pronouncements that are expected to have a material impact on the Company's financial position, results of operations or cash flows.

Revenue Recognition

9 Months Ended

Sep. 30, 2018

Revenue Recognition [Abstract]

Revenue Recognition

2. Revenue recognition

In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606) ("ASU No. 2014-09"). ASU No. 2014-09 (known as ASC 606) supersedes the revenue recognition requirements in Topic 605, Revenue Recognition, as well as most industry-specific guidance, and significantly enhances comparability of revenue recognition practices across entities and industries by providing a principles-based, comprehensive framework for addressing revenue recognition issues. In order for a provider of promised goods or services to recognize as revenue the consideration that it expects to receive in exchange for the promised goods or services, the provider should apply the following five steps: (1) identify the contract with a customer(s); (2) identify the performance obligations in the contract; (3) determine the transaction price; (4) allocate the transaction price to the performance obligations in the contract; and (5) recognize revenue when (or as) the entity satisfies a performance obligation. ASU No. 2014-09 also specifies the accounting for some costs to obtain or fulfill a contract with a customer and provides enhanced disclosure requirements. The Company adopted the requirements of the new standard as of January 1, 2018 using the modified retrospective method. The modified retrospective method requires companies to recognize the cumulative effect of initially applying the new standard as an adjustment to opening retained earnings.

A performance obligation is a promise in a contract to transfer a distinct product or service to a customer and is the unit of account under ASC 606. For contracts with multiple performance obligations, the Company allocates the contract's transaction price to each performance obligation on a relative standalone selling price basis using the Company's best estimate of the standalone selling price of each distinct product or service in the contract. The primary method used to estimate standalone selling price is the price observed in standalone sales to customers, however when prices in standalone sales are not available the Company may use third-party pricing for similar products or services or estimate the standalone selling price. Allocation of the transaction price is determined at the contracts' inception.

Once the performance obligations in the contract have been identified, the Company estimates the transaction price of the contract. The estimate includes amounts that are fixed as well as those that can vary based on expected outcomes of the activities or contractual terms. The Company's variable consideration primarily includes consideration transferred under its development contracts with the U.S. government as consideration received can vary based on developmental progression of the product candidate(s). When a contract's transaction price includes variable consideration, the Company evaluates the estimate of the variable consideration to determine whether the estimate needs to be constrained; therefore, the Company includes the variable consideration in the transaction price only to the extent that it is probable that a significant reversal of the amount of cumulative revenue recognized will not occur when the uncertainty associated with the variable consideration is subsequently resolved. Variable consideration estimates are updated at each reporting date. There were no constraints or material changes to the Company's variable consideration estimates as of or during the nine months ended September 30, 2018.

To indicate the transfer of control for the Company's product sales and contract manufacturing services, it must have a present right to payment, legal title must have passed to the customer, and the customer must have the significant risks and rewards of ownership. Revenue for long-term development contracts is generally recognized based upon the cost-to-cost measure of progress, provided that the Company meets the criteria associated with transferring control of the good or service over time.

The Company derives revenues primarily from the sale of its marketed medical countermeasures ("MCMs") products and contract revenues associated with development of its MCMs. The primary customer for the Company's MCM products and the primary source of funding for the development of the Company's MCM product candidate portfolio is the U.S. government. The Company's contracts for the sale of its MCM products generally have single performance obligation. Certain product sales contracts with the U.S. government include multiple performance obligations, which generally include the marketed product, stability testing associated with that product, expiry extensions and plasma collection. The Company's development contracts for its MCM product candidates generally are cost plus fixed fee arrangements, which the Company treats a single performance obligation with variable consideration. The U.S. government contracts for the sale and development of the Company's MCM products and product candidates are normally multi-year contracts.

In addition, the Company performs contract manufacturing services for third parties, which includes pharmaceutical product process development, manufacturing and filling services for injectable and other sterile products, inclusive of process design, technical transfer, manufacturing validations, laboratory analytical development support, aseptic filling, lyophilization, final packaging and accelerated and ongoing stability studies. These contracts generally include a single performance obligation with a duration that is less than one-year.

The Company finalized the review of its portfolio of revenue contracts that were not complete as of the adoption date and made its determination of its revenue streams as well as completed extensive contract specific reviews to determine the impact of the new standard on its historical and prospective revenue recognition. Because many of the Company's contracts with customers have unique contract terms, the Company reviewed all of its non-standard agreements in order to determine the effect of adoption.

The Company determined its Centers for Innovation in Advanced Development and Manufacturing ("CIADM") contract with the Biomedical Advanced Research and Development Authority ("BARDA") will have a material change in revenue recognition under the new guidance. Under ASC 606 at January 1, 2018, the Company determined that there was one performance obligation to provide ongoing manufacturing capability to the U.S. government and would recognize the consideration received in the base period on a straight-line basis over a 24-year period as the capability being created during the base period of the contract is being provided to the customer over both the base period contract term as well as 17 additional option periods. In addition, the Company determined the CIADM contract includes a significant financing component which is included in the transaction price. The Company calculated the financing component using an interest rate the Company had on its other debt obligations at inception of the contract. Prior to the adoption of ASC 606, the Company recognized revenue under the CIADM contract on a straight-line basis, based upon its estimate of the total payments to be received under the contract. The Company analyzed the estimated payments to be received on a quarterly basis to determine if an adjustment to revenue was required. As a result of the adoption of ASC 606, as of January 1, 2018, there was an increase in the deferred revenue liability of $42.4 million and an increase in deferred tax assets of $9.9 million with an offsetting reduction to retained earnings of $32.5 million.

In September 2018, the Company modified the CIADM contract under which one of the modifications reduced the 17 additional option periods to seven with the contract now scheduled to expire in June 2027. The Company determined the modification will be accounted for prospectively as a termination of the existing contract and the creation of a new contract.

The Company considers accounts receivables and deferred costs associated with revenue generating contracts, that are not included in inventory or property, plant and equipment, as contract assets. As of September 30, 2018 and December 31, 2017, the Company had $77.0 million and $143.7 million, respectively, in contract assets associated with accounts receivable, which is included in accounts receivable on the Company's condensed consolidated balance sheets. As of September 30, 2018 and December 31, 2017, the Company had contract assets associated with deferred costs of $4.0 million and $2.9 million, respectively, which is included in prepaid expenses and other current assets on the Company's condensed consolidated balance sheets.

When performance obligations are not transferred to a customer at the end of a reporting period, the amount allocated to those performance obligations are deferred until control of these performance obligations is transferred to the customer. The following table presents the rollforward of the contract liabilities, which is included in the Company's current and long-term deferred revenue line items in the condensed consolidated balance sheets:

(in thousands)
Balance at December 31, 2017	$	30,491
Adoption of new accounting standard (ASC 606)		42,379
Balance at January 1, 2018		72,870
Deferral of revenue		18,384
Recognition of revenue included in beginning of year contract liability		(15,121	)
Balance at September 30, 2018	$	76,133

We operate in one business segment. Therefore, results of our operations are reported on a consolidated basis for purposes of segment reporting, consistent with internal management reporting. For the three and nine months ended September 30, 2018, there was a nominal difference between revenues recognized under ASC 606 and revenues recognized based on the prior revenue recognition guidance for the same period. For the three and nine months ended September 30, 2018, the Company's revenues disaggregated by the major sources was as follows:

(in thousands)	Three Months Ended September 30, 2018						Nine Months Ended September 30, 2018
	U.S		Non-U.S.				U.S		Non-U.S.
	Government		Government		Total		Government		Government		Total

Product sales	$	127,332	$	5,937	$	133,269	$	363,254	$	25,861	$	389,115
Contract manufacturing		-		22,172		22,172		-		71,963		71,963
Contracts and grants		16,656		1,556		18,212		46,711		3,878		50,589
Total revenues	$	143,988	$	29,665	$	173,653	$	409,965	$	101,702	$	511,667

As of September 30, 2018, the Company had expected future revenues associated with performance obligations that have not been satisfied of approximately $599 million. The Company expects to recognize a majority of these revenues within the next 24 months, with the remainder recognized thereafter. However, the amount and timing of revenue recognition for unsatisfied performance obligations can materially change due to timing of funding appropriations from the U.S. government and the overall success of the Company's development activities associated with its MCM product candidates that are then receiving development funding support from the government under development contracts. In addition, the amount of future revenues associated with unsatisfied performance obligations excludes the value associated with unexercised option periods in the Company's contracts (which are not performance obligations as of September 30, 2018).

Acquisitions

9 Months Ended

Sep. 30, 2018

Acquisitions [Abstract]

Acquisitions

3. Acquisitions

Acquisition of ACAM2000 business

On October 6, 2017, the Company completed the acquisition of the ACAM2000® (Smallpox (Vaccinia) Vaccine, Live) business of Sanofi Pasteur Biologics, LLC ("Sanofi"). This acquisition included ACAM2000, the only smallpox vaccine licensed by the FDA, a current good manufacturing practices ("cGMP") live viral manufacturing facility and office and warehouse space, both in Canton, Massachusetts, and a cGMP viral fill/finish facility in Rockville, Maryland. With this acquisition, the Company also acquired an existing 10-year contract with the Centers for Disease Control and Prevention ("CDC"), which under the terms expired in March 2018. This contract had a stated value of up to $425 million, with a remaining contract value of up to approximately $160 million as of the acquisition date, for the delivery of ACAM2000 to the U.S. Strategic National Stockpile ("SNS") and the establishment of U.S.-based manufacturing of ACAM2000. This acquisition added to the Company's product portfolio and expanded the Company's manufacturing capabilities.

At the closing, the Company paid $97.5 million in an upfront payment and $20 million in milestone payments earned as of the closing date tied to the achievement of certain regulatory and manufacturing-related milestones, for a total payment in cash of $117.5 million. The agreement included an additional milestone payment of up to $7.5 million upon achievement of a regulatory milestone, which was achieved in November 2017. The $7.5 million milestone payment was made during the fourth quarter of 2017. This transaction was accounted for by the Company under the acquisition method of accounting, with the Company as the acquirer. Under the acquisition method of accounting, the assets and liabilities of the ACAM2000 business were preliminarily recorded as of October 6, 2017, the acquisition date, at their respective fair values, and combined with those of the Company.

The contingent purchase consideration obligation is based on a regulatory milestone. At October 6, 2017, the contingent purchase consideration obligation related to the regulatory milestone was recorded at a fair value of $2.2 million. The fair value of this obligation is based on a present value model of management's assessment of the probability of achievement of the regulatory milestone as of the acquisition date. This assessment is based on inputs that have no observable market (Level 3).

The total purchase price is summarized below:

(in thousands)
Amount of cash paid to Sanofi	$	117,500
Fair value of contingent purchase consideration		2,200
Total purchase price	$	119,700

The table below summarizes the allocation of the purchase price based upon the estimated fair values of assets acquired at October 6, 2017. The Company did not assume any liabilities in the acquisition. The Company has finalized the purchase price allocation related to this acquisition.

(in thousands)
Fair value of tangible assets acquired:
Inventory	$	74,876
Property, plant and equipment		19,995
Total fair value of tangible assets acquired		94,871

Acquired intangible asset		16,700
Goodwill		8,129
Total purchase price	$	119,700

The Company determined the fair value of the intangible asset using the income approach, which is based on the present value of future cash flows. The fair value measurements are based on significant unobservable inputs that are developed by the Company using estimates and assumptions of the respective market and market penetration of the Company's products. The Company determined the fair value of the ACAM2000 intangible asset using the income approach with a present value discount rate of 15.5%; this discount rate is derived from the estimated weighted-average cost of capital for substantially similar companies and assets. This is comparable to the estimated internal rate of return for the acquisition and represents the rate that market participants would use to value these intangible assets. The projected cash flows from the ACAM2000 intangible asset were based on key assumptions, including: estimates of revenues and operating profits, the life of the potential commercialized product and associated risks, and risks related to the viability of and potential alternative treatments in any future target markets. The Company has determined the ACAM2000 intangible asset will be amortized over 10 years.

The Company determined the fair value of the inventory using the probability adjusted comparative sales method, which estimates the expected sales price reduced for all costs expected to be incurred to complete and dispose of the inventory with a profit on those costs.

The Company determined the fair value of the property, plant and equipment utilizing either the cost approach or the sales comparison approach. The cost approach is derived by determining replacement cost of the asset and then subtracting any value that has been lost due to economic obsolescence, functional obsolescence, or physical deterioration. The sales comparison approach is derived by the determination that an asset is equal to the market price of an asset of comparable features such as design, location, size, construction, materials, use, capacity, specification, operational characteristics and other features or descriptions.

The Company recorded approximately $8.1 million in goodwill related to the ACAM2000 acquisition, representing the amount of the purchase price paid in the acquisition in excess of the fair value of the tangible and intangible assets acquired. There is no goodwill for tax purposes.

Fair value measurements

9 Months Ended

Sep. 30, 2018

Fair value measurements [Abstract]

Fair value measurements

4. Fair value measurements

Contingent consideration includes liabilities measured at fair value on a recurring basis. For the three and nine months ended September 30, 2018, the contingent purchase consideration obligations associated with RSDL increased by $0.2 million and $1.8 million, respectively. During the three and nine months ended September 30, 2017, the contingent purchase consideration obligations associated with RSDL increased by $0.9 million and $1.4 million, respectively. The changes in the fair value of the RSDL contingent consideration obligations are primarily due to the expected amount and timing of future net sales, which are inputs that have no observable market (Level 3). These changes are classified in the Company's statement of operations as cost of product sales and contract manufacturing.

The following table is a reconciliation of the beginning and ending balance of the liabilities, consisting only of contingent consideration, measured at fair value, using significant unobservable inputs (Level 3) during the nine months ended September 30, 2018.

(in thousands)
Balance at December 31, 2017	$	12,274
Expense included in earnings		1,917
Settlements		(2,234	)
Balance at September 30, 2018	$	11,957

Separate disclosure is required for assets and liabilities measured at fair value on a recurring basis from those measured at fair value on a non-recurring basis. As of September 30, 2018 and 2017 and for the quarters then ended, the Company had no significant assets or liabilities that were measured at fair value on a non-recurring basis.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Inventories

9 Months Ended

Sep. 30, 2018

Inventories [Abstract]

Inventories

5. Inventories

Inventories consisted of the following:

	September 30,		December 31,
(in thousands)	2018		2017
Raw materials and supplies	$	33,845	$	36,069
Work-in-process		64,825		76,610
Finished goods		27,075		30,133
Total inventories	$	125,745	$	142,812

Property, plant and equipment

9 Months Ended

Sep. 30, 2018

Property, plant and equipment [Abstract]

Property, plant and equipment

6. Property, plant and equipment

Property, plant and equipment consisted of the following:

	September 30,			December 31,
(in thousands)	2018			2017
Land and improvements	$	21,848		$	21,843
Buildings, building improvements and leasehold improvements		161,175			160,005
Furniture and equipment		217,908			206,819
Software		53,180			50,829
Construction-in-progress		141,348			100,088
Property, plant and equipment, gross		595,459			539,584
Less: Accumulated depreciation and amortization		(160,384	)		(132,374	)
Total property, plant and equipment, net	$	435,075		$	407,210

In the table presented above, as of September 30, 2018 and December 31, 2017, construction-in-progress primarily includes costs related to construction of the Company's CIADM facility.

Intangible assets	9 Months Ended
Intangible assets	Sep. 30, 2018
Intangible assets [Abstract]
Intangible assets	7. Intangible assets During the three months ended September 30, 2018 and 2017, the Company recorded amortization expense for intangible assets of $3.9 million and $1.6 million, respectively. During the nine months ended September 30, 2018 and 2017, the Company recorded amortization expense for intangible assets of $11.7 million and $4.7 million, respectively. Amortization expense has been recorded in operating expenses, specifically selling, general and administrative and cost of product sales and contract manufacturing. As of September 30, 2018, the weighted average amortization period remaining for intangible assets was 8.2 years.

Equity	9 Months Ended
Equity	Sep. 30, 2018
Equity [Abstract]
Equity	8. Equity During the nine months ended September 30, 2018, the Company granted 0.4 million shares of stock options and 0.4 million shares of restricted stock units under the Fourth Amended and Restated Emergent BioSolutions Inc. 2006 Stock Incentive Plan (the "Plan"). The grants vest over three equal annual installments beginning on the day prior to the anniversary of the grant date. On May 24, 2018, the Company's stockholders approved an increase in the number of shares issuable under the Plan by 3.0 million shares, to a total of 21.9 million shares, and extended the plan term to May 23, 2028.

Income taxes	9 Months Ended
Income taxes	Sep. 30, 2018
Income taxes [Abstract]
Income taxes	9. Income taxes The estimated effective annual tax rate for the Company, which excludes discrete adjustments, was 26% and 32% for the nine months ended September 30, 2018 and 2017, respectively. The decrease in the estimated effective annual tax rate is primarily due to the impact of the Tax Reform Act enacted on December 22, 2017, which reduced the U.S. federal corporate income tax rate from 35% to 21%, offset by state taxes, non-deductible expenses, international provisions from the U.S. tax reform and the impact of a change in the Company's jurisdictional mix of earnings. For the nine months ended September 30, 2018 and 2017, the Company recorded a discrete tax benefit of $8.7 million and $3.3 million, respectively, primarily associated with equity awards activity and finalizing positions taken on the Company's 2017 US federal and state income tax filings. On December 22, 2017, the SEC staff issued Staff Accounting Bulletin No. 118 to address the application of U.S. GAAP in situations when a registrant does not have the necessary information available, prepared, or analyzed (including computations) in reasonable detail to complete the accounting for certain income tax effects of the Tax Reform Act. For the nine months ended September 30, 2018, the Company revised certain provisional estimates recognized in 2017 upon the filing of US federal and state income tax filings. As the Internal Revenue Service and state jurisdictions continue to issue and/or clarify guidance, additional work may be necessary for a more detailed analysis of the Company's deferred tax assets and liabilities, its historical foreign earnings, as well as potential correlative adjustments. Any correlative adjustment to these amounts will be recorded to current tax expense in the final quarter of 2018 when the analysis is complete.

Earnings per share

9 Months Ended

Sep. 30, 2018

Earnings per share [Abstract]

Earnings per share

10. Earnings per share

The following table presents the calculation of basic and diluted net income per share:

	Three Months Ended September 30,				Nine Months Ended September 30,
(in thousands, except share and per share data)	2018		2017		2018		2017
Numerator:
Net income	$	20,945	$	33,551	$	66,181	$	48,652
Interest expense on convertible debt, net of tax		-		704		-		2,445
Amortization of convertible debt issuance costs, net of tax		-		195		-		586
Net income, adjusted	$	20,945	$	34,450	$	66,181	$	51,683

Denominator:
Weighted-average number of shares—basic		50,071,632		41,222,504		49,851,082		40,989,813
Dilutive securities—equity awards		1,415,364		1,148,857		1,338,598		1,003,794
Dilutive securities—convertible debt		-		8,096,468		-		8,096,481
Weighted-average number of shares—diluted		51,486,996		50,467,829		51,189,680		50,090,088

Net income per share - basic	$	0.42	$	0.81	$	1.33	$	1.19
Net income per share - diluted	$	0.41	$	0.68	$	1.29	$	1.03

For the three and nine months ended September 30, 2018 and 2017, basic earnings per share is computed by dividing net income by the weighted average number of shares of common stock outstanding during the period.

For the three and nine months ended September 30, 2018, diluted earnings per share was computed using the "treasury method" by dividing the net income by the weighted average number of shares of common stock outstanding during the period. The weighted average number of shares is adjusted for the potential dilutive effect of the exercise of stock options, and the vesting of restricted stock units and performance stock units.

For the three and nine months ended September 30, 2017, diluted earnings per share is computed using the "if-converted" method by dividing the net income adjusted for interest expense and amortization of debt issuance cost, both net of tax, associated with the 2.875% Convertible Senior Notes due 2021 (the "Notes") by the weighted average number of shares of common stock outstanding during the period. The weighted average number of shares is adjusted for the potential dilutive effect of the exercise of stock options; and the vesting of restricted stock units and performance stock units along with the assumption of the conversion of the Notes, at the beginning of the period. The Company terminated the conversion rights under the Notes during the fourth quarter of 2017.

For the three and nine months ended September 30, 2018 and 2017, there were no stock options excluded from the calculation of diluted earnings per share.

Litigation	9 Months Ended
Litigation	Sep. 30, 2018
Litigation [Abstract]
Litigation	11. Litigation Shareholder Class Action Lawsuit filed July 19, 2016 On July 19, 2016, Plaintiff William Sponn ("Sponn"), filed a putative class action complaint in the United States District Court for the District of Maryland on behalf of purchasers of the Company's common stock between January 11, 2016 and June 21, 2016, inclusive (the "Class Period"), seeking to pursue remedies under the Securities Exchange Act of 1934 against the Company and certain of its senior officers and directors, collectively, the Defendants. The complaint alleges, among other things, that the Company made materially false and misleading statements about the government's demand for BioThrax and expectations that the Company's five-year exclusive procurement contract with HHS would be renewed and omitted certain material facts. Sponn is seeking unspecified damages, including legal costs. On October 25, 2016, the Court added City of Cape Coral Municipal Firefighters' Retirement Plan and City of Sunrise Police Officers' Retirement Plan as plaintiffs and appointed them Lead Plaintiffs and Robins Geller Rudman & Dowd LLP as Lead Counsel. On December 27, 2016, the Plaintiffs filed an amended complaint that cites the same class period, names the same defendants and makes similar allegations to the original complaint. The Company filed a Motion to Dismiss on February 27, 2017. The Plaintiffs filed an opposition brief on April 28, 2017. The Company's Motion to Dismiss was heard and denied on July 6, 2017. The Company filed its answer on July 28, 2017. The parties then engaged in the process of exchanging discovery. The Plaintiffs filed an amended motion for class certification and appointment of Sponn and Geoffrey L. Flagstad as lead plaintiffs on December 20, 2017. A hearing on that motion was heard on May 2, 2018. On June 8, 2018 the Court granted class certification with a shortened class period, May 5, 2016 to June 21, 2016. The Defendants have denied, and continue to deny any and all allegations of fault, liability, wrongdoing, or damages. However, recognizing the risk, time, and expense of litigating any case to trial, on August 27, 2018, the Company reached an agreement in principle with Plaintiffs to settle all of the related claims of any individual plaintiff that purchased Company stock from January 11, 2016 to June 21, 2016, for $6.5 million, an amount that will be paid by the Company's insurance carrier. The settlement requires no payment by any of the Defendants. The Company and Defendants continue to deny any and all liability. The parties executed the settlement agreement on October 16, 2018, and filed the agreement with the court on October 17, 2018. The court granted preliminary approval of the settlement on October 18, 2018 and has scheduled a hearing regarding final approval for January 22, 2019. Although the court has granted preliminary approval, the court could decide not to grant final approval of the settlement or change terms of the settlement, and the law requires that individual plaintiffs have the right to opt-out of the settlement and bring their own, individual claims. The Company, therefore, at this time, cannot predict the results of this lawsuit and possible other legal proceedings with certainty. Defendants continue to believe that the allegations in the complaint are without merit. As of the date of this filing, the range of potential loss cannot be determined or estimated.

Subsequent events	9 Months Ended
Subsequent events	Sep. 30, 2018
Subsequent events [Abstract]
Subsequent events	12. Subsequent events Acquisitions Acquisition of PaxVax On October 4, 2018, the Company completed the acquisition of PaxVax Holding Company Ltd. ("PaxVax"), a company focused on developing, manufacturing, and commercializing specialty vaccines that protect against existing and emerging infectious diseases. This acquisition includes Vivotif® (Typhoid Vaccine Live Oral Ty21a), the only oral vaccine licensed by the FDA for the prevention of typhoid fever, Vaxchora® (Cholera Vaccine, Live, Oral), the only FDA-licensed vaccine for the prevention of cholera, an adenovirus 4/7 vaccine candidate being developed for military personnel under contract with the DoD, and additional clinical-stage vaccine candidates targeting chikungunya and other emerging infectious diseases, European-based current good manufacturing practices ("cGMP") biologics manufacturing facilities, and approximately 250 employees including those in research and development, manufacturing, and commercial operations with a specialty vaccines salesforce in the U.S. and in select European countries. At the closing, the Company paid a cash purchase price of $270 million, using a combination of cash-on-hand and borrowings under the Company's senior secured credit agreement. This transaction will be accounted for by the Company under the acquisition method of accounting, with the Company as the acquirer. Under the acquisition method of accounting, the assets and liabilities of PaxVax will be recorded as of October 4, 2018, the acquisition date, at their respective fair values, and combined with those of the Company. As of the date of this filing, the Company has not completed the initial accounting for the PaxVax acquisition due to the Company's need to continue to gather data necessary to complete the fair value valuation of the assets acquired and liabilities assumed. Acquisition of Adapt On October 15, 2018, the Company completed the acquisition of Adapt Pharma Limited ("Adapt") and its NARCAN® (naloxone HCl) Nasal Spray marketed product, the first and only needle-free formulation of naloxone approved by the FDA and Health Canada, for the emergency treatment of known or suspected opioid overdose as manifested by respiratory and/or central nervous system depression. This acquisition includes the NARCAN Nasal Spray marketed product and a development pipeline of new treatment and delivery options to address opioid overdose, and approximately 50 employees, located in the U.S., Canada, and Ireland, including those responsible for supply chain management, research and development, government affairs, and commercial operations. The Company paid approximately $575 million in cash at the closing (exclusive of closing adjustments) and issued 733,309 shares of Common Stock, based on the volume-weighted average price per share of the Common Stock as reported on the New York Stock Exchange for the ten-trading day period ending two days before closing, or $65.28 per share (an aggregate total of $47.9 million, inclusive of adjustments). The remaining consideration payable for the acquisition consists of up to $100 million in cash based on the achievement of certain sales milestones through 2022. The Company funded the cash portion of the payments made at closing using a combination of cash-on-hand and borrowings under its Amended Credit Agreement, as described in the Long-term debt section below. This transaction will be accounted for by the Company under the acquisition method of accounting, with the Company as the acquirer. Under the acquisition method of accounting, the assets and liabilities of Adapt will be recorded as of October 15, 2018, the acquisition date, at their respective fair values, and combined with those of the Company. As of the date of this filing, the Company has not completed the initial accounting for the Adapt acquisition due to the Company's need to continue to gather data necessary to complete the fair value valuation of the assets acquired and liabilities assumed. Legal proceedings associated with the acquisition of Adapt ANDA Litigation On September 14, 2018, Adapt Pharma Inc., Adapt Pharma Operations Limited and Adapt Pharma Ltd. (collectively, "Adapt Pharma") and Opiant Pharmaceuticals, Inc. ("Opiant") received notice from Perrigo UK FINCO Limited Partnership ("Perrigo"), that Perrigo had filed an Abbreviated New Drug Application ("ANDA"), with the United States Food and Drug Administration (the "FDA"), seeking regulatory approval to market a generic version of NARCAN® (naloxone hydrochloride) Nasal Spray 4mg/spray before the expiration of U.S. Patent Nos. 9,211,253 (the "'253 Patent"), 9,468,747 (the "'747 Patent"), 9,561,177 (the "'177 Patent"), 9,629,965 (the "'965 Patent") and 9,775,838 (the "'838 Patent"). Perrigo's notice letter asserts that its generic product will not infringe any valid and enforceable claim of these patents. On October 25, 2018, Emergent BioSolutions' Adapt Pharma subsidiaries and Opiant (collectively, the "Plaintiffs") filed a complaint for patent infringement against Perrigo in the United States District Court for the District of New Jersey arising from Perrigo's ANDA filing with the FDA. As a result of timely filing the lawsuit in accordance with the Hatch-Waxman Act, a 30-month stay of approval will be imposed by the FDA on Perrigo's ANDA, which is expected to remain in effect until March 2021 absent an earlier judgment, unfavorable to the Plaintiffs, by the Court. The Plaintiffs seek, among other relief, an order that the effective date of FDA approval of the ANDA be a date no earlier than the expiration of each of the '253 Patent, the '747 Patent, the '177 Patent, the '965 Patent and the '838 Patent, as well as equitable relief enjoining Perrigo from infringing these patents, and monetary relief as a result of any such infringement. Emergent continues to vigorously enforce the intellectual property portfolio related to NARCAN® Nasal Spray. On or about February 27, 2018, Adapt Pharma Inc. and Adapt Pharma Operations Limited and Opiant received notice from Teva Pharmaceuticals Industries Ltd. and Teva Pharmaceuticals USA, Inc., or collectively Teva, that Teva had filed an ANDA with the FDA seeking regulatory approval to market a generic version of NARCAN® (naloxone hydrochloride) Nasal Spray 2 mg/spray before the expiration of U.S. Patent No. 9,480,644 (the "'644 Patent"), and U.S. Patent No. 9,707,226 (the "'226 Patent") Teva's notice letter asserts that the commercial manufacture, use or sale of its generic drug product described in its ANDA will not infringe the '644 Patent or the '226 Patent, or that the '644 Patent and '226 Patent are invalid or unenforceable. Adapt Pharma Inc. and Adapt Pharma Operations Limited and Opiant filed a complaint for patent infringement against Teva in the United States District Court for the District of New Jersey. On or about September 13, 2016, Adapt Pharma Inc. and Adapt Pharma Operations Limited and Opiant received notice from Teva that Teva had filed an ANDA with the FDA seeking regulatory approval to market a generic version of NARCAN® (naloxone hydrochloride) Nasal Spray 4 mg/spray before the expiration of U.S. Patent No. 9,211,253 (the "'253 Patent"). Adapt Pharma Inc. and Adapt Pharma Operations Limited and Opiant received additional notices from Teva relating to the '747, the '177, the '965, and the '838 Patents. Teva's notice letters assert that the commercial manufacture, use or sale of its generic drug product described in its ANDA will not infringe the '253, the '747, the '177, the '965, or the '838 Patent, or that the '253, the '747, the '177, the '965, and the '838 Patents are invalid or unenforceable. Adapt Pharma Inc., Adapt Pharma Operations Limited and Opiant filed a complaint for patent infringement against Teva in the United States District Court for the District of New Jersey with respect to the '253 Patent. Adapt Pharma Inc. and Adapt Pharma Operations Limited and Opiant also filed complaints for patent infringement against Teva in the United States District Court for the District of New Jersey with respect to the '747, the '177, the '965, and the '838 Patents. All five proceedings have been consolidated. In the complaints described in the prior two paragraphs above, the Plaintiffs seek, among other relief, an order that the effective date of FDA approval of the Teva ANDA be a date not earlier than the expiration of the applicable patent, as well as equitable relief enjoining Teva from making, using, offering to sell, selling, or importing the product that is the subject of the Teva ANDA until after the expiration of the applicable patent, and monetary relief as a result of any such infringement. As of the date of this filing, the range of potential gain cannot be determined or estimated for the above mentioned complaints. Long-term debt On September 29, 2017, the Company entered into a senior secured credit agreement (the "2017 Credit Agreement") with four lending financial institutions. The 2017 Credit Agreement provided for a senior secured credit facility of up to $200 million through September 29, 2022. The 2017 Credit Agreement also included a $100 million accordion feature, which provided for an additional $100 million in revolver or incremental term loans, at the option of the Company, resulting in a potential aggregate commitment of up to $300 million. On October 4, 2018, the Company drew down $100 million under the 2017 Credit Agreement to pay for a portion of the purchase price of PaxVax. On October 15, 2018, the Company entered into an Amended and Restated Credit Agreement, dated as of October 15, 2018 (the "Amended Credit Agreement"), which amended and restated the Company's 2017 Credit Agreement, dated as of September 29, 2017. The Amended Credit Agreement (i) increased the revolving credit facility (the "Revolving Credit Facility") from $200 million to $600 million, (ii) extended the maturity of the Revolving Credit Facility from September 29, 2022 to October 13, 2023, (iii) provided for a term loan in the original principal amount of $450 million (the "Term Loan Facility," and together with the Revolving Credit Facility, the "Senior Secured Credit Facility"), (iv) added several additional lenders, (v) amended the applicable margin such that borrowings with respect to the Revolving Credit Facility will bear interest at the annual rate described below, (vi) amended the provision relating to incremental credit facilities such that the Company may request one or more incremental term loan facilities, or one or more increases in the commitments under the Revolving Credit Facility (each an "Incremental Loan"), in any amount if, on a pro forma basis, the Company's consolidated secured net leverage ratio does not exceed 2.50 to 1.00 after such incurrence, plus $200 million and (vii) amended the maximum consolidated net leverage ratio financial covenant from 3.50 to 1.0 (subject to 0.50% step up in connection with material acquisitions) to the maximum consolidated net leverage ratio described below. Prior to entering into the Amended Credit Agreement, the outstanding principal balance under the Revolving Credit Facility was $100 million. On October 15, 2018, the Company borrowed an additional $218 million, bringing the total borrowings under the Revolving Credit Facility to $318 million and the full $450 million under the Term Loan Facility. Such borrowings were used to finance a portion of the consideration for the Adapt acquisition and related fees, costs and expenses and the remainder will be used for general corporate purposes. The Revolving Credit Facility may be utilized for working capital, permitted acquisitions, capital expenditures and other general corporate purposes. The Revolving Credit Facility is available for borrowing through October 12, 2023 (unless earlier terminated). Borrowings under the Revolving Credit Facility and the Term Loan Facility will bear interest at a rate per annum equal to (a) a eurocurrency rate plus a margin ranging from 1.25% to 2.00% per annum, depending on the Company's consolidated net leverage ratio or (b) a base rate (which is the highest of the prime rate, the federal funds rate plus 0.50%, and a eurocurrency rate for an interest period of one month plus 1%) plus a margin ranging from 0.25% to 1.00%, depending on the Company's consolidated net leverage ratio. The Company is required to make quarterly payments under the Amended Credit Agreement for accrued and unpaid interest on the outstanding principal balance under the Revolving Credit Facility and the Term Loan Facility, based on the above interest rates. In addition, the Company is required to pay commitment fees ranging from 0.15% to 0.30% per annum, depending on the Company's consolidated net leverage ratio, in respect of the average daily unused commitments under the Revolving Credit Facility. The Company is to repay the outstanding principal amount of the Term Loan Facility in quarterly installments based on an annual percentage equal to 2.5% of the original principal amount of the Term Loan Facility during each of the first two years of the Term Loan Facility, 5% of the original principal amount of the Term Loan Facility during the third year of the Term Loan Facility and 7.5% of the original principal amount of the Term Loan Facility during each year of the remainder of the term of the Term Loan Facility until the maturity date of the Term Loan Facility, at which time the entire unpaid principal balance of the Term Loan Facility will be due and payable. The Company has the right to prepay the Term Loan Facility without premium or penalty. The Revolving Credit Facility and the Term Loan Facility mature (unless earlier terminated) on October 13, 2023. The Amended Credit Agreement also provides for mandatory prepayments of the Term Loan Facility in the event the Company or its Subsidiaries (a) incur indebtedness not otherwise permitted under the Amended Credit Agreement or (b) receive cash proceeds in excess of $100 million during the term of the Senior Secured Credit Facility from certain dispositions of property or from casualty events involving their property, subject to certain reinvestment rights. The Amended Credit Agreement contains affirmative and negative covenants customary for financings of this type. Negative covenants in the Amended Credit Agreement, among other things, limit the ability of the Company to: incur indebtedness and liens; dispose of assets; make investments including loans, advances, guarantees, or acquisitions (other than permitted acquisitions, subject to compliance with the financial covenants and certain other conditions); and enter into certain merger or consolidation transactions. The Amended Credit Agreement also contains financial covenants, including (1) a minimum consolidated debt service coverage ratio of 2.50 to 1.00, and (2) a maximum consolidated net leverage ratio of 4.00 to 1.00 through September 29, 2019, 3.75 to 1.00 from September 30, 2019 through September 29, 2020 and 3.50 to 1.00 thereafter, which may be adjusted to 4.00 to 1.00 for a four quarter period in connection with a material permitted acquisition, subject to the terms and conditions of the Amended Credit Agreement. Each of the ratios referred to in the foregoing clauses (1) and (2) is calculated on a consolidated basis for each consecutive four fiscal quarter period.

Summary of significant accounting policies (Policies)	9 Months Ended
Summary of significant accounting policies (Policies)	Sep. 30, 2018
Summary of significant accounting policies [Abstract]
Basis of presentation and consolidation	Basis of presentation and consolidation The accompanying unaudited condensed consolidated financial statements include the accounts of Emergent BioSolutions Inc. ("Emergent" or the "Company") and its wholly owned and majority owned subsidiaries. All significant intercompany accounts and transactions have been eliminated in consolidation. The unaudited consolidated financial statements included herein have been prepared in accordance with U.S. generally accepted accounting principles for interim financial information and in accordance with the instructions to Form 10-Q and Article 10 of Regulation S-X issued by the Securities and Exchange Commission ("SEC"). Certain information and footnote disclosures normally included in consolidated financial statements prepared in accordance with U.S. generally accepted accounting principles have been condensed or omitted pursuant to such rules and regulations. These consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto contained in the Company's Annual Report on Form 10-K for the year ended December 31, 2017, as filed with the SEC. In the opinion of the Company's management, any adjustments contained in the accompanying unaudited condensed consolidated financial statements are of a normal recurring nature and are necessary to present fairly the financial position of the Company as of September 30, 2018. Interim results are not necessarily indicative of results that may be expected for any other interim period or for an entire year. Significant accounting policies During the nine months ended September 30, 2018, there have been no significant changes to the Company's summary of significant accounting policies contained in the Company's Annual Report on Form 10-K for the year ended December 31, 2017, as filed with the SEC, except for the new revenue recognition standard the Company adopted effective January 1, 2018. See Note 2. "Revenue recognition" for further details.
Recently issued accounting standards	Recently issued accounting standards Recently Adopted ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments In August 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standard Update ("ASU") 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments ("ASU 2016-15"). ASU 2016-15 eliminates the diversity in practice related to the classification of certain cash receipts and payments for debt prepayments or extinguishment costs, the maturing of a zero-coupon bond, the settlement of contingent liabilities arising from a business combination, proceeds from insurance settlements, distributions from certain equity method investees and beneficial interests obtained in a financial asset securitization. ASU 2016-15 designates the appropriate cash flow classification, including requirements to allocate certain components of these cash receipts and payments among operating, investing and financing activities. The Company adopted the new standard effective January 1, 2018 and has determined the impact of ASU No. 2016-15 on its condensed consolidated financial statements will be related to the settlement of contingent liabilities arising from a business combination. ASU 2016-18, Restricted Cash (Topic 230): Statement of Cash Flows In November 2016, the FASB issued ASU 2016-18, Restricted Cash (Topic 230): Statement of Cash Flows ("ASU 2016-18"). ASU 2016-18 requires that a statement of cash flows explain the change during the period in the total of cash, cash equivalents and amounts generally described as restricted cash or restricted cash equivalents. Restricted cash and restricted cash equivalents will be included with cash and cash equivalents when reconciling the beginning of period and end of period balances on the statement of cash flows upon adoption of this standard. The Company adopted the new standard effective January 1, 2018. Restricted cash primarily consists of collateralized cash for a standby letter of credit and guarantee arrangement with a bank. ASU No. 2017-09, Compensation-Stock Compensation (Topic 718): Scope of Modification Accounting In May 2017, the FASB issued ASU 2017-09, Compensation-Stock Compensation (Topic 718): Scope of Modification Accounting ("ASU 2017-09"). ASU 2017-09 clarifies which changes to the terms or conditions of a share-based payment award require an entity to apply modification accounting in Topic 718. The Company adopted the new standard effective January 1, 2018, which did not have a material impact on its condensed consolidated financial statements. ASU No. 2018-07, Compensation-Stock Compensation (Topic 718): Improvements to Nonemployee Share-based Payment Accounting In June 2018, the FASB issued ASU 2018-07, Compensation-Stock Compensation (Topic 718): Improvements to Nonemployee Share-based Payment Accounting ("ASU 2018-07"). ASU 2018-07 expands the scope of Topic 718 to include share-based payments issued to nonemployees for goods and services. ASU No. 2018-07 is intended to reduce cost and complexity and to improve financial reporting for share-based payments issued to nonemployees (for example, service providers, external legal counsel, suppliers, etc.). The standard will be effective after December 15, 2018 for the Company, with early adoption permitted, but no earlier than the Company's adoption date of Topic 606. The Company early adopted the new standard effective April 1, 2018. The adoption of this standard did not have a material impact on the Company's condensed consolidated financial statements. Not Yet Adopted ASU 2016-02, Leases (Topic 842) In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) ("ASU 2016-02"). ASU 2016-02 increases transparency and comparability among organizations by requiring the recognition of lease assets and lease liabilities on the balance sheet and disclosure of key information about leasing arrangements for both lessees and lessors. The standard will be effective January 1, 2019, with early adoption permitted. The standard will be applied using a modified retrospective approach to the beginning of the earliest period presented in the financial statements. The Company's adoption efforts are primarily focused on the review of its existing lease contracts, identification of other contracts that may fall under the scope of the new guidance and performing a gap analysis on the current state of lease-related activities compared with the future state of lease-related activities. The Company has identified the lease agreements that will be impacted by the new standard and is currently evaluating the overall impact on its condensed consolidated financial statements and related disclosures. ASU 2016-16, Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory In October 2016, the FASB issued ASU 2016-16, Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory ("ASU 2016-16"). ASU 2016-16 improves the accounting for the income tax consequences of intra-entity transfers of assets other than inventory. The new standard will require entities to recognize the income tax consequences of an intra-entity transfer of a non-inventory asset when the transfer occurs. The guidance is effective for fiscal years beginning after December 15, 2017, and early adoption is permitted. The Company is currently evaluating the effects of adopting ASU 2016-16 on its condensed consolidated financial statements but the adoption is not expected to have a significant impact as of the filing of this report. ASU 2017-04, Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment In January 2017, the FASB issued ASU 2017-04, Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment ("ASU 2017-04"). ASU 2017-04 simplifies the subsequent measurement of goodwill and eliminates Step 2 from the goodwill impairment test. ASU 2017-04 is effective for annual and interim goodwill tests beginning after December 15, 2019. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates on or after January 1, 2017. The Company is currently evaluating the impact that the adoption of this standard will have on its condensed consolidated financial statements. ASU 2018-02, Income Statement—Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income In February 2018, the FASB issued ASU 2018-02, Income Statement—Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income ("ASU 2018-02"). ASU 2018-02 provides the option to reclassify certain income tax effects related to the Tax Cuts and Jobs Act passed in December of 2017 between accumulated other comprehensive income and retained earnings and also requires additional disclosures. ASU 2018-02 is effective for all entities for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years, with early adoption permitted. Adoption of ASU 2018-02 is to be applied either in the period of adoption or retrospectively to each period in which the effect of the change in the tax laws or rates were recognized. The Company is currently evaluating the impact of adopting ASU 2018-02 on its condensed consolidated financial statements. ASU 2018-11, Leases (Topic 842): Targeted Improvements In July 2018, the FASB issued ASU 2018-11, Leases (Topic 842): Targeted Improvements ("ASU 2018-11"). In issuing ASU 2018-11, the FASB decided to provide another transition method in addition to the existing transition method by allowing entities to initially apply the new leases standard at the adoption date and recognize a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption. The Company is currently evaluating the impact that ASU 2016-02 and ASU 2018-11 will have on its condensed consolidated financial statements. There are no other recently issued accounting pronouncements that are expected to have a material impact on the Company's financial position, results of operations or cash flows.

Revenue Recognition (Tables)

9 Months Ended

Sep. 30, 2018

Revenue Recognition [Abstract]

Rollforward of Contract Liabilities

(in thousands)
Balance at December 31, 2017	$	30,491
Adoption of new accounting standard (ASC 606)		42,379
Balance at January 1, 2018		72,870
Deferral of revenue		18,384
Recognition of revenue included in beginning of year contract liability		(15,121	)
Balance at September 30, 2018	$	76,133

Disaggregation of Revenue

(in thousands)	Three Months Ended September 30, 2018						Nine Months Ended September 30, 2018
	U.S		Non-U.S.				U.S		Non-U.S.
	Government		Government		Total		Government		Government		Total

Product sales	$	127,332	$	5,937	$	133,269	$	363,254	$	25,861	$	389,115
Contract manufacturing		-		22,172		22,172		-		71,963		71,963
Contracts and grants		16,656		1,556		18,212		46,711		3,878		50,589
Total revenues	$	143,988	$	29,665	$	173,653	$	409,965	$	101,702	$	511,667

Acquisitions (Tables)

9 Months Ended

Sep. 30, 2018

Acquisitions [Abstract]

Total Purchase Price

The total purchase price is summarized below:

(in thousands)
Amount of cash paid to Sanofi	$	117,500
Fair value of contingent purchase consideration		2,200
Total purchase price	$	119,700

Allocation of Purchase Price Based Upon Estimated Fair Values of Assets Acquired and Liabilities Assumed

(in thousands)
Fair value of tangible assets acquired:
Inventory	$	74,876
Property, plant and equipment		19,995
Total fair value of tangible assets acquired		94,871

Acquired intangible asset		16,700
Goodwill		8,129
Total purchase price	$	119,700

Fair value measurements (Tables)

9 Months Ended

Sep. 30, 2018

Fair value measurements [Abstract]

Reconciliation of Liabilities Measured at Fair Value Using Significant Unobservable Inputs (Level 3)

(in thousands)
Balance at December 31, 2017	$	12,274
Expense included in earnings		1,917
Settlements		(2,234	)
Balance at September 30, 2018	$	11,957

Inventories (Tables)

9 Months Ended

Sep. 30, 2018

Inventories [Abstract]

Inventories

Inventories consisted of the following:

	September 30,		December 31,
(in thousands)	2018		2017
Raw materials and supplies	$	33,845	$	36,069
Work-in-process		64,825		76,610
Finished goods		27,075		30,133
Total inventories	$	125,745	$	142,812

Property, plant and equipment (Tables)

9 Months Ended

Sep. 30, 2018

Property, plant and equipment [Abstract]

Property, Plant and Equipment

Property, plant and equipment consisted of the following:

	September 30,			December 31,
(in thousands)	2018			2017
Land and improvements	$	21,848		$	21,843
Buildings, building improvements and leasehold improvements		161,175			160,005
Furniture and equipment		217,908			206,819
Software		53,180			50,829
Construction-in-progress		141,348			100,088
Property, plant and equipment, gross		595,459			539,584
Less: Accumulated depreciation and amortization		(160,384	)		(132,374	)
Total property, plant and equipment, net	$	435,075		$	407,210

Earnings per share (Tables)

9 Months Ended

Sep. 30, 2018

Earnings per share [Abstract]

Basic and Diluted Net Income per Share

The following table presents the calculation of basic and diluted net income per share:

	Three Months Ended September 30,				Nine Months Ended September 30,
(in thousands, except share and per share data)	2018		2017		2018		2017
Numerator:
Net income	$	20,945	$	33,551	$	66,181	$	48,652
Interest expense on convertible debt, net of tax		-		704		-		2,445
Amortization of convertible debt issuance costs, net of tax		-		195		-		586
Net income, adjusted	$	20,945	$	34,450	$	66,181	$	51,683

Denominator:
Weighted-average number of shares—basic		50,071,632		41,222,504		49,851,082		40,989,813
Dilutive securities—equity awards		1,415,364		1,148,857		1,338,598		1,003,794
Dilutive securities—convertible debt		-		8,096,468		-		8,096,481
Weighted-average number of shares—diluted		51,486,996		50,467,829		51,189,680		50,090,088

Net income per share - basic	$	0.42	$	0.81	$	1.33	$	1.19
Net income per share - diluted	$	0.41	$	0.68	$	1.29	$	1.03

Revenue Recognition (Details) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
Revenue Recognition (Details) $ in Thousands	Sep. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2018 USD ($) Period Segment	Sep. 30, 2017 USD ($)	Dec. 31, 2017 USD ($) Period
Revenue [Abstract]
Transaction price	$ 599,000		$ 599,000
Number of additional option periods \| Period			7		17
Contract revenue	173,653	$ 149,434	$ 511,667	$ 367,064
Number of operating segments \| Segment			1
Contract with Customer, Asset and Liability [Abstract]
Accounts receivable	76,955		$ 76,955		$ 143,653
Deferred costs	4,000		4,000		2,900
Contract with Customer, Liability [Abstract]
Contract liability	76,133		76,133
Deferral of revenue			18,384
Recognition of revenue included in beginning of year contract liability			(15,121)
Contract liability	$ 76,133		$ 76,133
Accounting Standards Update 2014-09 [Member]
Contract with Customer, Liability [Abstract]
Contract liability					72,870
Contract liability					$ 72,870
CIADM [Member]
Revenue [Abstract]
Term of contract					24 years
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] \| Accounting Standards Update 2014-09 [Member]
Contract with Customer, Liability [Abstract]
Contract liability					$ 42,379
Contract liability					42,379
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] \| CIADM [Member] \| Accounting Standards Update 2014-09 [Member]
Revenue [Abstract]
Retained earnings					32,500
Deferred tax assets					9,900
Contract with Customer, Liability [Abstract]
Contract liability					42,400
Contract liability					42,400
Calculated under Revenue Guidance in Effect before Topic 606 [Member]
Contract with Customer, Liability [Abstract]
Contract liability					30,491
Contract liability					$ 30,491

Revenue Recognition, Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Disaggregation of revenue [Abstract]
Total revenues	$ 173,653	$ 149,434	$ 511,667	$ 367,064
U.S. Government [Member]
Disaggregation of revenue [Abstract]
Total revenues	143,988		409,965
Non-U.S. Government [Member]
Disaggregation of revenue [Abstract]
Total revenues	29,665		101,702
Product Sales [Member]
Disaggregation of revenue [Abstract]
Total revenues	133,269	114,296	389,115	259,875
Product Sales [Member] \| U.S. Government [Member]
Disaggregation of revenue [Abstract]
Total revenues	127,332		363,254
Product Sales [Member] \| Non-U.S. Government [Member]
Disaggregation of revenue [Abstract]
Total revenues	5,937		25,861
Contract Manufacturing [Member]
Disaggregation of revenue [Abstract]
Total revenues	22,172	18,912	71,963	52,700
Contract Manufacturing [Member] \| U.S. Government [Member]
Disaggregation of revenue [Abstract]
Total revenues	0		0
Contract Manufacturing [Member] \| Non-U.S. Government [Member]
Disaggregation of revenue [Abstract]
Total revenues	22,172		71,963
Contracts and Grants [Member]
Disaggregation of revenue [Abstract]
Total revenues	18,212	$ 16,226	50,589	$ 54,489
Contracts and Grants [Member] \| U.S. Government [Member]
Disaggregation of revenue [Abstract]
Total revenues	16,656		46,711
Contracts and Grants [Member] \| Non-U.S. Government [Member]
Disaggregation of revenue [Abstract]
Total revenues	$ 1,556		$ 3,878

Revenue Recognition, Performance Obligations (Details) $ in Millions	Sep. 30, 2018 USD ($)
Performance Obligations [Abstract]
Performance obligations expected to be satisfied	$ 599
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-04-01
Performance Obligations [Abstract]
Revenue, remaining performance obligation, expected timing of satisfaction, period	24 months

Acquisitions (Details) - USD ($) $ in Thousands	Oct. 06, 2017	Sep. 30, 2018	Dec. 31, 2017
Fair value of tangible assets acquired and liabilities assumed [Abstract]
Goodwill		$ 49,130	$ 49,130
Sanofi [Member]
Summary of total purchase price [Abstract]
Amount of cash paid to Sanofi	$ 117,500
Fair value of contingent purchase consideration	2,200
Total purchase price	119,700
Fair value of tangible assets acquired and liabilities assumed [Abstract]
Inventory	74,876
Property, plant and equipment	19,995
Total fair value of tangible assets acquired and liabilities assumed	94,871
Acquired intangible asset	16,700
Goodwill	8,129
Total purchase price	$ 119,700
ACAM2000 [Member]
Acquisitions [Abstract]
Term of contract under acquisition	10 years
Value of contract	$ 425,000
Amount for deliveries of product to the SNS	160,000
Upfront cash payment	97,500
Amount of payment for manufacturing related milestones	20,000
Amount of payment for regulatory related milestones	$ 7,500		$ 7,500
Fair value of tangible assets acquired and liabilities assumed [Abstract]
Amortization period of intangible asset	10 years
ACAM2000 [Member] \| Discount Rate [Member]
Fair value of tangible assets acquired and liabilities assumed [Abstract]
Present value discount rate	15.50%

Fair value measurements (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
Fair value measurements (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Unobservable Input Reconciliation [Roll Forward]
Balance, beginning of period			$ 12,274
Expense included in earnings			1,917
Settlements			(2,234)
Balance, end of period	$ 11,957		11,957
RSDL [Member]
Unobservable Input Reconciliation [Roll Forward]
Change in fair value of contingent obligations	$ 200	$ 900	$ 1,800	$ 1,400

Inventories (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Inventories [Abstract]
Raw materials and supplies	$ 33,845	$ 36,069
Work-in-process	64,825	76,610
Finished goods	27,075	30,133
Total inventories	$ 125,745	$ 142,812

Property, plant and equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Property, plant and equipment [Abstract]
Property, plant and equipment, gross	$ 595,459	$ 539,584
Less: Accumulated depreciation and amortization	(160,384)	(132,374)
Total Property, plant and equipment, net	435,075	407,210
Land and Improvements [Member]
Property, plant and equipment [Abstract]
Property, plant and equipment, gross	21,848	21,843
Buildings, Building Improvements and Leasehold Improvements [Member]
Property, plant and equipment [Abstract]
Property, plant and equipment, gross	161,175	160,005
Furniture and Equipment [Member]
Property, plant and equipment [Abstract]
Property, plant and equipment, gross	217,908	206,819
Software [Member]
Property, plant and equipment [Abstract]
Property, plant and equipment, gross	53,180	50,829
Construction-In-Progress [Member]
Property, plant and equipment [Abstract]
Property, plant and equipment, gross	$ 141,348	$ 100,088

Intangible assets (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
Intangible assets (Details) - USD ($) $ in Millions	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Intangible assets [Abstract]
Amortization	$ 3.9	$ 1.6	$ 11.7	$ 4.7
Weighted average amortization period			8 years 2 months 12 days

Equity (Details) - 2006 Plan [Member] shares in Millions		9 Months Ended
Equity (Details) - 2006 Plan [Member] shares in Millions	May 24, 2018 shares	Sep. 30, 2018 Installment shares
Stock issued or granted during period [Abstract]
Number of installments \| Installment		3
Increase in number of shares issuable under the plan (in shares)	3.0
Total number of shares issuable under the plan (in shares)	21.9
Extended plan term date	May 23, 2028
Stock Options [Member]
Stock issued or granted during period [Abstract]
Stock options granted (in shares)		0.4
Restricted Stock Units [Member]
Stock issued or granted during period [Abstract]
Restricted stock units granted (in shares)		0.4

Income taxes (Details) - USD ($) $ in Millions	9 Months Ended		12 Months Ended
Income taxes (Details) - USD ($) $ in Millions	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Income taxes [Abstract]
Effective annual tax rate	26.00%	32.00%
Federal corporate tax rate	21.00%		35.00%
Discrete tax benefit	$ 8.7	$ 3.3

Earnings per share (Details) - USD ($)
$ / shares in Units, $ in Thousands

3 Months Ended

9 Months Ended

Sep. 30, 2018

Sep. 30, 2017

Sep. 30, 2018

Sep. 30, 2017

Numerator [Abstract]

Net Income

$ 20,945

$ 33,551

$ 66,181

$ 48,652

Interest expense, net of tax

704

2,445

Amortization of debt issuance costs, net of tax

195

586

Net income, adjusted

$ 20,945

$ 34,450

$ 66,181

$ 51,683

Denominator [Abstract]

Weighted-average number of shares-basic (in shares)

50,071,632

41,222,504

49,851,082

40,989,813

Dilutive securities-equity awards (in shares)

1,415,364

1,148,857

1,338,598

1,003,794

Dilutive securities-convertible debt (in shares)

8,096,468

8,096,481

Weighted-average number of shares-diluted (in shares)

51,486,996

50,467,829

51,189,680

50,090,088

Net income per share-basic (in dollars per share)

$ 0.42

$ 0.81

$ 1.33

$ 1.19

Net income per share-diluted (in dollars per share)

^[1]

$ 0.41

$ 0.68

$ 1.29

$ 1.03

Convertible debt [Member]

Antidilutive shares excluded from computation of earnings per share [Abstract]

Interest rate percentage

2.875%

[1]	See "Earnings per share" footnote for details on calculation.

Subsequent events, Acquisitions (Details) - Subsequent Event [Member]	Oct. 15, 2018 USD ($) Employee $ / shares shares	Oct. 04, 2018 USD ($) Employee
PaxVax [Member]
Subsequent Event [Line Items]
Number of employees \| Employee		250
Cash paid for acquisition		$ 270,000,000
Adapt Pharma [Member]
Subsequent Event [Line Items]
Number of employees \| Employee	50
Cash paid for acquisition	$ 575,000,000
Common stock issued for acquisition (in shares) \| shares	733,309
Number of trading days considered to determine share price for acquisition	10 days
Number of trading days before closing to determine share price for acquisition	2 days
Share price (in dollars per share) \| $ / shares	$ 65.28
Amount of common stock issued for acquisition including adjustments	$ 47,870,412
Adapt Pharma [Member] \| Maximum [Member]
Subsequent Event [Line Items]
Remaining consideration payable for acquisition cash amount	$ 100,000,000

Subsequent events, Long-term debt (Details) $ in Millions	Oct. 15, 2018 USD ($)	Sep. 29, 2017 USD ($) Institution	Oct. 04, 2018 USD ($)
2017 Credit Agreement [Member]
Long-term Debt [Abstract]
Number of lending institutions \| Institution		4
Current borrowing capacity		$ 200
Maturity date		Sep. 29, 2022
Borrowing capacity with accordion feature		$ 100
Maximum borrowing capacity		$ 300
Subsequent Event [Member] \| 2017 Credit Agreement [Member]
Long-term Debt [Abstract]
Amount drew down under the facility			$ 100
Subsequent Event [Member] \| Amended Credit Agreement [Member] \| Minimum [Member]
Long-term Debt [Abstract]
Commitment fee percentage	0.15%
Subsequent Event [Member] \| Amended Credit Agreement [Member] \| Maximum [Member]
Long-term Debt [Abstract]
Commitment fee percentage	0.30%
Subsequent Event [Member] \| Amended Credit Agreement [Member] \| Eurocurrency [Member]
Long-term Debt [Abstract]
Debt instrument, basis spread on variable rate	1.00%
Debt instrument, term of variable rate	1 month
Subsequent Event [Member] \| Amended Credit Agreement [Member] \| Eurocurrency [Member] \| Minimum [Member]
Long-term Debt [Abstract]
Debt instrument, basis spread on variable rate	1.25%
Subsequent Event [Member] \| Amended Credit Agreement [Member] \| Eurocurrency [Member] \| Maximum [Member]
Long-term Debt [Abstract]
Debt instrument, basis spread on variable rate	2.00%
Subsequent Event [Member] \| Amended Credit Agreement [Member] \| Base Rate [Member] \| Minimum [Member]
Long-term Debt [Abstract]
Debt instrument, basis spread on variable rate	0.25%
Subsequent Event [Member] \| Amended Credit Agreement [Member] \| Base Rate [Member] \| Maximum [Member]
Long-term Debt [Abstract]
Debt instrument, basis spread on variable rate	1.00%
Subsequent Event [Member] \| Amended Credit Agreement [Member] \| Federal Funds Rate [Member]
Long-term Debt [Abstract]
Debt instrument, basis spread on variable rate	0.50%
Subsequent Event [Member] \| Amended Credit Agreement [Member] \| Revolving Credit Facility [Member]
Long-term Debt [Abstract]
Current borrowing capacity	$ 600
Maturity date	Oct. 13, 2023
Consolidated secured net leverage ratio	2.50
Debt covenant, net leverage ratio	3.50
Amount required for net leverage ratio	$ 200
Percentage of debt covenant, net leverage ratio, step up in connection with material acquistions	0.50%
Outstanding credit facility	$ 318		$ 100
Additional amount borrowed under the facility	$ 218
Subsequent Event [Member] \| Amended Credit Agreement [Member] \| Revolving Credit Facility [Member] \| Minimum [Member]
Long-term Debt [Abstract]
Debt covenant, consolidated debt service coverage ratio, minimum	2.50
Subsequent Event [Member] \| Amended Credit Agreement [Member] \| Revolving Credit Facility [Member] \| Maximum [Member]
Long-term Debt [Abstract]
Debt covenant, leverage ratio through September 29, 2019	4.00
Debt covenant, leverage ratio from September 30, 2019 to September 29, 2020	3.75
Debt covenant, leverage ratio thereafter	3.50
Debt covenant, leverage ratio adjusted for forth quarter period	4.00
Subsequent Event [Member] \| Amended Credit Agreement [Member] \| Term Loan Facility [Member]
Long-term Debt [Abstract]
Current borrowing capacity	$ 450
Percentage of original principal amount required to repay in the first two years	2.50%
Percentage of original principal amount required to repay during the third year	5.00%
Percentage of original principal amount required to repay remaining year	7.50%
Cash proceeds excess amount from dispositions of property or casualty events subject to certain reinvestment right	$ 100