Jazz Pharmaceuticals (JAZZ) 10-Q 5 Aug 14 2014 Q2 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	6 Months Ended
	Jun. 30, 2014	Jul. 29, 2014
Document Information [Line Items]	'	'
Document Type	'10-Q	'
Amendment Flag	'false	'
Document Period End Date	30-Jun-14	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q2	'
Trading Symbol	'JAZZ	'
Entity Registrant Name	'Jazz Pharmaceuticals plc	'
Entity Central Index Key	'0001232524	'
Current Fiscal Year End Date	'--12-31	'
Entity Filer Category	'Large Accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	60,221,128

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Current assets:	'	'
Cash and cash equivalents	$268,255	$636,504
Accounts receivable, net of allowances	160,775	124,805
Inventories	33,098	28,669
Prepaid expenses	28,447	7,183
Deferred tax assets, net	35,869	33,613
Other current assets	18,468	33,843
Total current assets	544,912	864,617
Property and equipment, net	38,462	14,246
Intangible assets, net	1,680,004	812,396
Goodwill	760,314	450,456
Deferred tax assets, net, non-current	96,495	74,597
Deferred financing costs	24,427	14,605
Other non-current assets	11,135	7,304
Total assets	3,155,749	2,238,221
Current liabilities:	'	'
Accounts payable	32,555	21,005
Accrued liabilities	142,843	119,718
Current portion of long-term debt	9,473	5,572
Income taxes payable	5,500	336
Contingent consideration	0	50,000
Deferred tax liability, net	6,259	6,259
Deferred revenue	1,138	1,138
Total current liabilities	197,768	204,028
Deferred revenue, non-current	5,148	5,718
Long-term debt, less current portion	1,186,960	544,404
Deferred tax liability, net, non-current	456,611	168,497
Other non-current liabilities	29,175	20,040
Commitments and contingencies (Note 8)	'	'
Jazz Pharmaceuticals plc shareholders' equity	'	'
Ordinary shares	6	6
Non-voting euro deferred shares	55	55
Capital redemption reserve	471	471
Additional paid-in capital	1,273,159	1,220,317
Accumulated other comprehensive income	59,946	56,153
Retained earnings (accumulated deficit)	-53,946	18,532
Total Jazz Pharmaceuticals plc shareholders’ equity	1,279,691	1,295,534
Noncontrolling interests	396	0
Total shareholders’ equity	1,280,087	1,295,534
Total liabilities and shareholders’ equity	$3,155,749	$2,238,221

Condensed_Consolidated_Stateme

Condensed Consolidated Statements Of Operations (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Revenues:	'	'	'	'
Product sales, net	$289,100	$206,564	$534,086	$401,216
Royalties and contract revenues	2,130	1,688	4,063	3,273
Total revenues	291,230	208,252	538,149	404,489
Operating expenses:	'	'	'	'
Cost of product sales (excluding amortization of acquired developed technologies and intangible asset impairment)	30,692	25,031	61,616	52,251
Selling, general and administrative	100,556	77,506	206,919	148,034
Research and development	20,090	9,250	38,199	15,997
Acquired in-process research and development	0	0	127,000	4,000
Intangible asset amortization	32,795	19,399	63,977	38,954
Intangible asset impairment	32,806	0	32,806	0
Total operating expenses	216,939	131,186	530,517	259,236
Income from operations	74,291	77,066	7,632	145,253
Interest expense, net	-11,429	-7,142	-21,505	-14,541
Foreign currency gain (loss)	74	-385	197	-114
Loss on extinguishment and modification of debt	0	-3,749	0	-3,749
Income (loss) before income tax provision	62,936	65,790	-13,676	126,849
Income tax provision	19,350	23,605	36,377	41,239
Net income (loss)	43,586	42,185	-50,053	85,610
Net loss attributable to noncontrolling interests, net of tax	-73	0	-1,062	0
Net income (loss) attributable to Jazz Pharmaceuticals plc	$43,659	$42,185	($48,991)	$85,610
Net income (loss) per ordinary share attributable to Jazz Pharmaceuticals plc:	'	'	'	'
Basic net income (in dollars per share)	$0.73	$0.72	($0.83)	$1.46
Diluted net income (in dollars per share)	$0.70	$0.69	($0.83)	$1.39
Weighted-average ordinary shares used in calculating net income (loss) per ordinary share attributable to Jazz Pharmaceuticals plc:	'	'	'	'
Basic (in shares)	59,519	58,737	59,025	58,548
Diluted (in shares)	62,378	61,568	59,025	61,541

Condensed_Consolidated_Stateme1

Condensed Consolidated Statements Of Comprehensive Income (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Statement of Comprehensive Income [Abstract]	'	'	'	'
Net income (loss)	$43,586	$42,185	($50,053)	$85,610
Other comprehensive income (loss):	'	'	'	'
Foreign currency translation adjustments	-11,220	8,614	3,796	-11,826
Other comprehensive income (loss)	-11,220	8,614	3,796	-11,826
Total comprehensive income (loss)	32,366	50,799	-46,257	73,784
Comprehensive loss attributable to noncontrolling interests, net of tax	-347	0	-1,059	0
Comprehensive income (loss) attributable to Jazz Pharmaceuticals plc	$32,713	$50,799	($45,198)	$73,784

Condensed_Consolidated_Stateme2

Condensed Consolidated Statements Of Cash Flows (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
Operating activities	'	'
Net income (loss)	($50,053)	$85,610
Adjustments to reconcile net income (loss) to net cash provided by operating activities:	'	'
Amortization of intangible assets	63,977	38,954
Share-based compensation	32,367	20,263
Intangible asset impairment	32,806	0
Depreciation	3,169	1,170
Acquired in-process research and development	127,000	4,000
Loss on disposal of property and equipment	0	40
Excess tax benefit from share-based compensation	-792	0
Acquisition accounting inventory fair value step-up adjustments	10,477	2,631
Change in fair value of contingent consideration	0	7,900
Deferred income taxes	-18,598	-9,064
Provision for losses on accounts receivable and inventory	1,925	1,236
Loss on extinguishment and modification of debt	0	-3,749
Other non-cash transactions	2,907	3,251
Changes in assets and liabilities:	'	'
Accounts receivable	-21,889	-39,015
Inventories	-3,302	-6,104
Prepaid expenses and other current assets	936	-14,672
Other long-term assets	-3,365	-2,617
Accounts payable	-31,555	4,707
Accrued liabilities	-821	-7,749
Income taxes payable	5,454	-21,898
Deferred revenue	-557	-492
Contingent consideration	-14,900	0
Other non-current liabilities	8,461	6,709
Net cash provided by operating activities	143,647	78,609
Investing activities	'	'
Acquisitions, net of cash acquired	-828,676	0
Acquisition of in-process research and development	-127,000	-4,000
Purchases of property and equipment	-14,660	-4,710
Acquisition of intangible assets	0	-1,300
Net cash used in investing activities	-970,336	-10,010
Financing activities	'	'
Net proceeds from issuance of debt	636,355	553,425
Proceeds from employee equity incentive and purchase plans and exercise of warrants	31,642	15,463
Share repurchases	-23,487	-53,578
Acquisition of noncontrolling interests	-136,640	0
Payment of contingent consideration	-35,100	0
Payment of employee withholding taxes related to share-based awards	-10,551	-1,597
Excess tax benefit from share-based compensation	792	0
Repayment of long-term debt	-4,804	-463,124
Net cash provided by financing activities	458,207	50,589
Effect of exchange rates on cash and cash equivalents	233	-2,077
Net increase (decrease) in cash and cash equivalents	-368,249	117,111
Cash and cash equivalents, at beginning of period	636,504	387,196
Cash and cash equivalents, at end of period	$268,255	$504,307

The_Company_and_Summary_of_Sig

The Company and Summary of Significant Accounting Policies	6 Months Ended
	Jun. 30, 2014
Accounting Policies [Abstract]	'
The Company and Summary of Significant Accounting Policies	'
	The Company and Summary of Significant Accounting Policies
	Jazz Pharmaceuticals plc, a public limited company formed under the laws of Ireland, is a specialty biopharmaceutical company focused on improving patients’ lives by identifying, developing and commercializing differentiated products that address unmet medical needs. Our strategy is to continue to create shareholder value by:
	•	Growing sales of the existing products in our portfolio, including by identifying new growth opportunities;
	•	Acquiring additional marketed specialty products or products close to regulatory approval to leverage our existing expertise and infrastructure; and
	•	Pursuing targeted development of a pipeline of post-discovery specialty product candidates.
	On January 23, 2014, pursuant to a tender offer, we became the indirect majority shareholder of Gentium S.p.A., or Gentium, thereby acquiring control of Gentium on that date. In February 2014, we completed a subsequent offering period of the tender offer, resulting in total purchases pursuant to the tender offer of approximately 98% of the fully diluted voting securities of Gentium. In June 2014, we acquired a further 1.7% interest in Gentium for cash consideration of $17.5 million, resulting in an aggregate acquisition cost to us of $993.7 million, comprising cash payments of $1,010.8 million offset by proceeds from the exercise of Gentium share options of $17.1 million. Please see Note 2 for additional information regarding our acquisition of Gentium, which is referred to in this report as the Gentium Acquisition.
	Throughout this report, unless otherwise indicated or the context otherwise requires, all references to “Jazz Pharmaceuticals,” “the registrant,” “we,” “us,” and “our” refer to Jazz Pharmaceuticals plc and its consolidated subsidiaries.
	Basis of Presentation
	These unaudited condensed consolidated financial statements have been prepared following the requirements of the Securities and Exchange Commission, or SEC, for interim reporting. As permitted under those rules, certain footnotes and other financial information that are normally required by U.S. generally accepted accounting principles, or GAAP, can be condensed or omitted. The information included in this Quarterly Report on Form 10-Q should be read in conjunction with the annual consolidated financial statements and accompanying notes of Jazz Pharmaceuticals plc included in its Annual Report on Form 10-K for the year ended December 31, 2013. The results of operations of the acquired Gentium business, along with the estimated fair values of the assets acquired and liabilities assumed in the transaction, have been included in our condensed consolidated financial statements since we acquired control of Gentium on January 23, 2014, which date we refer to in this report as the closing date of the Gentium Acquisition.
	In the opinion of management, these condensed consolidated financial statements have been prepared on the same basis as the annual consolidated financial statements and include all adjustments, consisting only of normal recurring adjustments, considered necessary for the fair presentation of our financial position and operating results. The results for the three and six months ended June 30, 2014 are not necessarily indicative of the results to be expected for the year ending December 31, 2014, for any other interim period or for any future period.
	These condensed consolidated financial statements include the accounts of Jazz Pharmaceuticals plc and our subsidiaries and intercompany transactions and balances have been eliminated. We record noncontrolling interests in our condensed consolidated financial statements which represent the ownership interest of minority shareholders in the equity of Gentium. Our condensed consolidated financial statements include the results of operations of businesses we have acquired from the date of each acquisition for the applicable reporting periods.
	Reclassifications
	Certain prior period amounts presented in these condensed consolidated financial statements and the accompanying footnotes have been reclassified to conform to current period presentation. Upfront license fees of $4.0 million, previously classified as research and development expense, have been reclassified to acquired in-process research and development, or IPR&D, in the condensed consolidated statements of operations and reclassified from operating activities to investing activities in the condensed consolidated statements of cash flows to conform to current period presentation. Inventories of $1.4 million previously classified as raw materials as of December 31, 2013 have been reclassified to work-in-process to conform to current period presentation.
	Significant Risks and Uncertainties
	Our financial results are significantly influenced by sales of Xyrem® (sodium oxybate) oral solution. In the three and six months ended June 30, 2014, net product sales of Xyrem were $191.4 million and $351.7 million, respectively, which represented 66.2% and 65.9% of total net product sales, respectively. Maintaining or increasing sales of Xyrem in its approved indications is subject to a number of risks and uncertainties, including the potential introduction of generic competition, changed or increased regulatory restrictions, and continued acceptance of Xyrem as safe and effective by physicians and patients. Four abbreviated new drug applications, or ANDAs, have been filed with the U.S. Food and Drug Administration, or FDA, by third parties seeking to market generic versions of Xyrem. We initiated lawsuits against all four third parties, and the litigation proceedings are ongoing. We cannot predict the timing or outcome of these proceedings. Although no trial date has been scheduled in the lawsuit against the first ANDA filer, Roxane Laboratories, Inc., or Roxane, we anticipate that trial on some of the patents in that case could occur as early as the first quarter of 2015. In addition, between late June and early August 2014, petitions for covered business method, or CBM, post-grant patent review by the Patent Trial and Appeal Board, or PTAB, of the U.S. Patent and Trademark Office, or USPTO, were filed by certain of the ANDA filers with respect to the validity of our patents covering the distribution system for Xyrem. To date, these petitions have not been accepted by the PTAB. We cannot predict the outcome of the PTAB’s decision on whether to institute any of the petitioned CBM review proceedings, whether additional post-grant patent review challenges will be filed, the outcome of any CBM review or other proceeding if the PTAB decides to institute one or more CBM review or other proceedings, or the impact any CBM review or other proceeding might have on ongoing ANDA litigation proceedings. We expect that the approval of an ANDA that results in the launch of a generic version of Xyrem, or the approval and launch of other sodium oxybate products that compete with Xyrem, would have a material adverse effect on our business, financial condition, results of operations and growth prospects.
	In addition, we are continuing our efforts on various regulatory matters, including updating documents that we have submitted to the FDA on our risk management and controlled distribution system for Xyrem, which we refer to as the Xyrem Risk Management Program. We have not reached agreement with the FDA on certain significant terms of our risk evaluation and mitigation strategies, or REMS, documents for Xyrem. For example, we disagree with the FDA’s current position that, as part of the current REMS process, the Xyrem deemed REMS should be modified to enable the distribution of Xyrem through more than one pharmacy, or potentially through retail pharmacies and wholesalers, as well as with certain modifications proposed by the FDA that would, in the FDA’s view, be sufficient to ensure that the REMS includes only those elements necessary to ensure that the benefits of Xyrem outweigh its risks, and that would, in the FDA’s view, reduce the burden on the healthcare system.
	The FDA notified us that it would exercise its claimed authority to modify our REMS and that it would finalize the REMS as modified by the FDA unless we initiated dispute resolution procedures with respect to the modification of the Xyrem deemed REMS.  Given these circumstances, we initiated dispute resolution procedures with the FDA at the end of February 2014. We received the FDA’s denial of our initial dispute resolution submission in the second quarter of 2014 and have submitted a request for further supervisory review to the next administrative level of the FDA. We expect to receive the FDA’s response to this further appeal in the third quarter of 2014. We cannot predict whether, or on what terms, we will reach agreement with the FDA on final REMS documents for Xyrem, the outcome or timing of the current dispute resolution procedure, whether we will initiate additional dispute resolution proceedings with the FDA or other legal proceedings prior to finalizing the REMS documents, or the outcome or timing of any such proceedings. We expect that final REMS documents for Xyrem will include modifications to, and/or requirements that are not currently implemented in, the Xyrem Risk Management Program. Any such modifications or additional requirements could potentially make it more difficult or expensive for us to distribute Xyrem, make it easier for future generic competitors, and/or negatively affect sales of Xyrem.
	We also expect to face pressure to license or share our Xyrem Risk Management Program, which is the subject of multiple issued patents, or elements of it, with generic competitors. In January 2014, the FDA held an initial meeting with us and the then-current Xyrem ANDA applicants to facilitate the development of a single shared system REMS for Xyrem (sodium oxybate), and we expect these interactions to continue among the parties and the new ANDA applicant. We cannot predict the outcome or impact on our business of any future action that we may take with respect to the development of a single shared system REMS for Xyrem (sodium oxybate), licensing or sharing our REMS, or the FDA’s response to a certification that a third party had been unable to obtain a license.
	Sales of our second largest product, Erwinaze® (asparaginase Erwinia chrysanthemi), called Erwinase® in markets outside of the United States, continue to grow. In the three and six months ended June 30, 2014, net product sales of Erwinaze/Erwinase were $47.9 million and $94.8 million, respectively, which represented 16.6% and 17.7% of total net product sales, respectively. We seek to maintain and increase sales of Erwinaze, as well as to make Erwinaze more widely available, through ongoing research and development activities. However, our ability to successfully and sustainably maintain and grow sales of Erwinaze is subject to a number of risks and uncertainties, including the limited population of patients with acute lymphoblastic leukemia, or ALL, and the incidence of hypersensitivity reactions to E. coli-derived asparaginase within that population, our ability to obtain data on the use of Erwinaze in young adults age 18 to 39 with ALL who are hypersensitive to E. coli-derived asparaginase, as well as our need to apply for and receive marketing authorizations, through the European Union’s, or EU’s, mutual recognition procedure or otherwise, in certain additional countries so we can launch promotional efforts in those countries. Another significant challenge to our ability to maintain the current sales level and continue to increase sales is our need to assure sufficient supply of Erwinaze on a timely basis. We have limited inventory of Erwinaze, and, during 2013, our supply of Erwinaze was nearly completely absorbed by demand for the product. In the past, we have experienced a disruption of supply of Erwinase in the European market due to manufacturing challenges, including shortages related to the failure of a batch to meet certain specifications in 2013, and we may experience similar or other manufacturing challenges in the future. If our continued efforts to avoid supply shortages are not successful, we could experience Erwinaze supply interruptions in the future, which could have a material adverse effect on our sales of and revenues from Erwinaze and limit our potential future maintenance and growth of the market for this product. In addition, while we continue to work with the manufacturer of Erwinaze to evaluate potential steps to increase the supply of Erwinaze over the longer term to address expected growing worldwide demand, our ability to increase sales of Erwinaze may be limited by our ability to obtain an increased supply of the product.
	We have made a significant investment in Defitelio® (defibrotide). We added the product to our portfolio as a result of the Gentium Acquisition and recently secured worldwide rights to the product by acquiring rights to defibrotide in the Americas. Our ability to realize the anticipated benefits from this product is subject to a number of risks and uncertainties, including our ability to successfully commercialize Defitelio in Europe and to obtain marketing approval in other countries, including the United States. We commenced the launch of Defitelio in certain countries in Europe in March 2014 and expect to launch in additional European countries on a rolling basis during the remainder of 2014 and in 2015. A key challenge to our success in commercializing Defitelio in Europe is our ability to obtain appropriate pricing and reimbursement approvals in those European countries where we have not yet launched Defitelio, including in countries where pricing and reimbursement approvals are required for launch. If we experience delays and unforeseen difficulties in obtaining favorable pricing and reimbursement approvals, planned launches in the affected countries would be delayed and our anticipated revenue from Defitelio in 2014 and our growth prospects in Europe could be negatively affected. Our anticipated revenue and growth prospects would also be negatively affected in the event that we are unable to ultimately obtain favorable pricing and reimbursement approvals in countries that represent significant markets. We are also engaged in activities related to the potential approval of defibrotide in the United States and are assessing the potential for approval in other countries and for development of defibrotide in indications in addition to the treatment of severe hepatic veno-occlusive disease, or VOD. While we believe that it may be possible to submit a new drug application, or NDA, for defibrotide for the treatment of severe VOD in patients undergoing hematopoietic stem cell transplantation, or HSCT, therapy without the need for data from an additional clinical trial, we may be unable to acquire and remediate key information required for the NDA data package in a timely manner and/or we may be required to conduct additional time-consuming and costly clinical trials in order to submit an NDA to the FDA or to otherwise obtain any regulatory approval of defibrotide in the United States. If we fail to obtain approval for defibrotide in the United States in a timely manner, in other countries or for new indications, our anticipated revenue from defibrotide and our growth prospects would be negatively affected.
	In addition to risks related specifically to Xyrem, Erwinaze and Defitelio/defibrotide, we are subject to other challenges and risks specific to our business, as well as risks and uncertainties common to companies in the pharmaceutical industry with development and commercial operations, including: the challenges of protecting and enhancing our intellectual property rights; delays or problems in the supply or manufacture of our products, particularly because we maintain limited inventories of certain products, including products for which our supply demands are growing, and we are dependent on single source suppliers to continue to meet our ongoing commercial demand or our requirements for clinical trial supplies; the need to obtain appropriate pricing and reimbursement for our products in an increasingly challenging environment due to, among other things, the attention being paid to healthcare cost containment and other austerity measures in the United States and worldwide, and in particular the need to maintain reimbursement for Xyrem in the United States; and the ongoing regulation and oversight by the FDA, the U.S. Drug Enforcement Administration, or DEA, and non-U.S. regulatory agencies, including with respect to product labeling, requirements for distribution, obtaining sufficient DEA quotas where needed, marketing and promotional activities, adverse event reporting and product recalls or withdrawals.  For example, in April 2014, we received a Form FDA 483 at the conclusion of a pharmacovigilance inspection conducted by the FDA. The Form FDA 483 included observations relating to certain aspects of our adverse drug experience reporting system for all of our products, including Xyrem. In light of the fact that we have previously received observations relating to adverse drug experience reporting, we do not know whether the FDA will take further action, including the issuance of a warning letter as a follow-up to its inspection, or require us to take further action, with respect to the matters covered in the Form FDA 483.
	Other risks and uncertainties related to our ability to execute on our strategy include: the challenges of achieving and maintaining commercial success of our products, such as obtaining sustained acceptance of our products by patients, physicians and payors; the risks associated with business combination or product or product candidate acquisition transactions, such as the challenges inherent in the integration of acquired businesses, including the acquired Gentium business, with our historic business, the increase in geographic dispersion among our centers of operation and taking on the operation of a manufacturing plant as a result of the Gentium Acquisition, and the risks that we may otherwise fail to realize the anticipated benefits (commercial or otherwise) from such acquisition transactions; the difficulty and uncertainty of pharmaceutical product development, including the timing thereof, and the uncertainty of clinical success, such as the risk that results from preclinical studies and/or early clinical trials may not be predictive of results obtained in later and larger clinical trials planned or anticipated to be conducted for our product candidates; the inherent uncertainty associated with the regulatory approval process, especially as we continue to undertake increased activities and make growing investment in our product pipeline development projects; our ability to identify and acquire, in-license or develop additional products or product candidates to grow our business; and possible restrictions on our ability and flexibility to pursue certain future opportunities as a result of our substantial outstanding debt obligations, which have increased significantly as a result of, among other things, the Gentium Acquisition.
	Business Acquisitions
	Our consolidated financial statements include the results of operations of an acquired business from the date of acquisition. We account for acquired businesses using the acquisition method of accounting. The acquisition method of accounting for acquired businesses requires, among other things, that assets acquired, liabilities assumed and any noncontrolling interests in the acquired business be recognized at their estimated fair values as of the acquisition date, with limited exceptions, and that the fair value of acquired IPR&D be recorded on the balance sheet. Also, transaction costs are expensed as incurred. Any excess of the acquisition consideration over the assigned values of the net assets acquired is recorded as goodwill. Contingent consideration is included within the acquisition cost and is recognized at its fair value on the acquisition date. A liability resulting from contingent consideration is remeasured to fair value at each reporting date until the contingency is resolved and changes in fair value are recognized in earnings.
	Acquired In-Process Research and Development
	The initial costs of rights to IPR&D projects acquired in an asset acquisition are expensed as IPR&D unless the project has an alternative future use. The fair value of IPR&D projects acquired in a business combination are capitalized and accounted for as indefinite-lived intangible assets until the underlying project receives regulatory approval, at which point the intangible asset will be accounted for as a finite-lived intangible asset, or discontinued, at which point the intangible asset will be written off. Development costs incurred after an acquisition are expensed as incurred.
	Intangible Assets
	Intangible assets with finite useful lives consist primarily of purchased developed technology and are amortized on a straight-line basis over their estimated useful lives, which range from two to 16 years. The estimated useful lives associated with finite-lived intangible assets are consistent with the estimated lives of the associated products and may be modified when circumstances warrant. Such assets are reviewed for impairment when events or circumstances indicate that the carrying value of an asset may not be recoverable. An impairment loss would be recognized when estimated undiscounted future cash flows expected to result from the use of an asset and its eventual disposition are less than its carrying amount. The amount of any impairment is measured as the difference between the carrying amount and the fair value of the impaired asset.
	Concentrations of Risk
	Financial instruments that potentially subject us to concentrations of credit risk consist of cash, cash equivalents and marketable securities. Our investment policy permits investments in U.S. federal government and federal agency securities, corporate bonds or commercial paper issued by U.S. corporations, money market instruments, certain qualifying money market mutual funds, certain repurchase agreements, and tax-exempt obligations of U.S. states, agencies and municipalities and places restrictions on credit ratings, maturities, and concentration by type and issuer. We are exposed to credit risk in the event of a default by the financial institutions holding our cash, cash equivalents and marketable securities and issuers of investments to the extent recorded on the balance sheet.
	We are also subject to credit risk from our accounts receivable related to our product sales. We monitor our exposure within accounts receivable and record a reserve against uncollectible accounts receivable as necessary. We extend credit to pharmaceutical wholesale distributors and specialty pharmaceutical distribution companies, primarily in the United States, and to other international distributors and hospitals. Customer creditworthiness is monitored and collateral is not required. We monitor deteriorating economic conditions in certain European countries which may result in variability of the timing of cash receipts and an increase in the average length of time that it takes to collect accounts receivable outstanding. Historically, we have not experienced significant credit losses on our accounts receivable and we do not expect to have write-offs or adjustments to accounts receivable which would have a material adverse effect on our financial position, liquidity or results of operations. As of June 30, 2014, five customers accounted for 81% of gross accounts receivable, including Express Scripts Specialty Distribution Services, Inc. and its affiliate CuraScript, Inc., or Express Scripts, which accounted for 65% of gross accounts receivable, Idis Limited, which accounted for 8% of gross accounts receivable, and Accredo Health Group, Inc., or Accredo, which accounted for 5% of gross accounts receivable.  As of December 31, 2013, five customers accounted for 85% of gross accounts receivable, including Express Scripts, which accounted for 69% of gross accounts receivable, and Accredo, which accounted for 9% of gross accounts receivable.
	We depend on single source suppliers and manufacturers for each of our products, product candidates and their active pharmaceutical ingredients.
	Use of Estimates
	The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses, and related disclosures in the condensed consolidated financial statements and accompanying notes. Management bases its estimates on historical experience and on assumptions believed to be reasonable under the circumstances. Actual results could differ materially from those estimates.
	Net Income (Loss) per Ordinary Share Attributable to Jazz Pharmaceuticals plc
	Basic net income (loss) per ordinary share attributable to Jazz Pharmaceuticals plc is based on the weighted-average number of ordinary shares outstanding. Diluted net income (loss) per ordinary share attributable to Jazz Pharmaceuticals plc is based on the weighted-average number of ordinary shares outstanding and potentially dilutive ordinary shares outstanding.
	Basic and diluted net income (loss) per ordinary share attributable to Jazz Pharmaceuticals plc were computed as follows (in thousands, except per share amounts):
		Three Months Ended						Six Months Ended
		June 30,						June 30,
		2014			2013			2014			2013
	Numerator:
	Net income (loss) attributable to Jazz Pharmaceuticals plc	$	43,659		$	42,185		$	(48,991	)	$	85,610
	Denominator:
	Weighted-average ordinary shares used in calculating net income (loss) per ordinary share attributable to Jazz Pharmaceuticals plc - basic	59,519			58,737			59,025			58,548
	Dilutive effect of employee equity incentive and purchase plans	2,293			1,414			—			1,456
	Dilutive effect of warrants	566			1,417			—			1,537
	Weighted-average ordinary shares used in calculating net income (loss) per ordinary share attributable to Jazz Pharmaceuticals plc - diluted	62,378			61,568			59,025			61,541
	Net income (loss) per ordinary share attributable to Jazz Pharmaceuticals plc:
	Basic	$	0.73		$	0.72		$	(0.83	)	$	1.46
	Diluted	$	0.7		$	0.69		$	(0.83	)	$	1.39
	Potentially dilutive ordinary shares from employee equity incentive and purchase plans and warrants were not included in the diluted net loss per ordinary share attributable to Jazz Pharmaceuticals plc for the six months ended June 30, 2014 because the inclusion of such shares would have an anti-dilutive effect.
	Potentially dilutive ordinary shares from employee equity incentive and purchase plans and warrants are determined by applying the treasury stock method to the assumed exercise of warrants and share options, the assumed vesting of outstanding restricted stock units, or RSUs, and the assumed issuance of ordinary shares under our employee stock purchase plan, or ESPP. The following table represents the weighted-average ordinary shares that were excluded from the computation of diluted net income (loss) per ordinary share attributable to Jazz Pharmaceuticals plc for the periods presented because including them would have an anti-dilutive effect (in thousands):
		Three Months Ended					Six Months Ended
		June 30,					June 30,
		2014		2013			2014		2013
	Options to purchase ordinary shares and RSUs	1,088		2,839			5,526		2,596
	Warrants to purchase ordinary shares	—		—			928		—
	Ordinary shares under ESPP	—		—			137		—
	Recent Accounting Pronouncements
	In May 2014, the Financial Accounting Standards Board, or the FASB, issued Accounting Standards Update, or ASU, No. 2014-09, “Revenue from Contracts with Customers”, or ASU No. 2014-09, which states that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. To achieve this, an entity will need to identify the contract with a customer; identify the separate performance obligations in the contract; determine the transaction price; allocate the transaction price to the separate performance obligations in the contract; and recognize revenue when (or as) the entity satisfies each performance obligation. ASU No. 2014-09 will be effective for us beginning January 1, 2017 and can be adopted on a full retrospective basis or on a modified retrospective basis. We are currently assessing our approach to the adoption of this standard and the impact on our results of operations and financial position.
	In April 2014, the FASB issued ASU No. 2014-08, “Presentation of Financial Statements (Topic 205) and Property, Plant, and Equipment (Topic 360): Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity”, or ASU 2014-08. Under ASU 2014-08, only disposals representing a strategic shift in operations should be presented as discontinued operations. Those strategic shifts should have a major effect on the organization’s operations and financial results. Additionally, ASU 2014-08 requires expanded disclosures about discontinued operations that will provide financial statement users with more information about the assets, liabilities, income, and expenses of discontinued operations. ASU 2014-08 is effective for fiscal and interim periods beginning on or after December 15, 2014, with early adoption permitted. The impact of the adoption of this ASU on our results of operations, financial position, cash flows and disclosures will be based on our future disposal activity.

Business_Combination_and_Asset

Business Combination and Asset Acquisitions	6 Months Ended
	Jun. 30, 2014
Business Combinations [Abstract]	'
Business Combination and Asset Acquisition	'
	Business Combination and Asset Acquisitions
	Gentium Acquisition
	On December 19, 2013, we entered into a definitive agreement with Gentium, or the Gentium tender offer agreement, pursuant to which we made a cash tender offer of $57.00 per share for all outstanding Gentium ordinary shares and American Depositary Shares, or ADSs. As of the expiration of the initial offering period on January 22, 2014, 12,244,156 Gentium ordinary shares and ADSs were properly tendered and not withdrawn in the tender offer. These ordinary shares and ADSs represented approximately 79% of Gentium’s issued and outstanding ordinary shares and ADSs and 69% of the fully diluted number of ordinary shares and ADSs (in each case without duplication for ordinary shares underlying ADSs). All properly tendered ordinary shares and ADSs as of such date were accepted for payment, which was made in accordance with the terms of the tender offer.
	Upon payment for the properly tendered ordinary shares and ADSs on January 23, 2014, we became the indirect majority shareholder of Gentium and acquired control of Gentium. Following the expiration of the initial offering period, and in accordance with the terms of the Gentium tender offer agreement, we commenced a subsequent offering period to acquire all remaining untendered ordinary shares and ADSs. The subsequent offering period expired on February 20, 2014. In total, pursuant to the tender offer agreement, we purchased approximately 98% of Gentium’s fully diluted ordinary shares and ADSs. In June 2014, we acquired additional Gentium ordinary shares, representing a further 1.7% interest in Gentium, for cash consideration of $17.5 million. As of June 30, 2014, the aggregate acquisition cost of the Gentium ordinary shares and ADSs was $993.7 million, comprising cash payments of $1,010.8 million offset by proceeds from the exercise of Gentium share options of $17.1 million. $857.1 million of the acquisition consideration is attributable to the 12,244,156 Gentium ordinary shares and ADSs purchased on the closing date of the Gentium Acquisition, as well as 1,345,023 ADSs committed to tender in accordance with the guaranteed delivery procedures contemplated by the tender offer and options to acquire 1,666,608 ordinary shares of Gentium subject to support agreements requiring that such options be exercised and the underlying ordinary shares be tendered in a subsequent offering period. These ADSs and ordinary shares represented in the aggregate approximately 86% of the fully diluted number of ordinary shares and ADSs of Gentium.  The remaining $136.6 million of the acquisition cost is attributable to the acquisition of an additional 12% of the fully diluted Gentium ordinary shares and ADSs during the subsequent offering period of the tender offer and an additional 1.7% in June 2014, which are accounted for as an acquisition of noncontrolling interests.
	We believe the Gentium Acquisition provides us with an opportunity to diversify our development and commercial portfolio and complement our clinical experience in hematology/oncology and our expertise in reaching targeted physicians who treat serious medical conditions.
	The Gentium Acquisition was accounted for using the acquisition method of accounting under which assets and liabilities of Gentium were recorded at their respective estimated fair values as of the closing date of the Gentium Acquisition and added to the assets and liabilities of Jazz Pharmaceuticals plc, including an amount for goodwill representing the difference between the acquisition consideration and the estimated fair value of the identifiable net assets. The results of operations of Gentium and the estimated fair values of the assets acquired and liabilities assumed have been included in our consolidated financial statements since the closing date of the Gentium Acquisition.
	During the six months ended June 30, 2014, we incurred $10.0 million in acquisition-related costs related to the Gentium Acquisition, which primarily consisted of banking, legal, accounting and valuation-related expenses. In addition, during the three and six months ended June 30, 2014, we incurred $3.3 million and $4.4 million, respectively, related to change in control obligations associated with the Gentium Acquisition. These expenses were recorded in selling, general and administrative expense in the accompanying condensed consolidated statements of operations. The change in control obligations are included within accrued liabilities in the accompanying condensed consolidated balance sheets and are expected to be paid in the second half of 2014. During the three and six months ended June 30, 2014, our condensed consolidated statements of operations included revenues of $22.5 million and $35.9 million, respectively, and a net loss of $11.2 million and $29.1 million, respectively, from the acquired Gentium business, as measured from the closing date of the Gentium Acquisition.
	The acquisition consideration (not including the acquisition cost of $119.2 million to acquire the 12% noncontrolling interests in the subsequent offering period of the tender offer and the acquisition cost of $17.5 million to acquire the 1.7% noncontrolling interests in June 2014) was comprised of (in thousands):
	Cash consideration for shares acquired in initial tender offer period	$	697,917
	Liability for shares committed under guaranteed delivery procedures	76,666
	Liability for options committed for exercise	82,503
	Total acquisition consideration	$	857,086
	The fair values of assets acquired and liabilities assumed at the closing date of the Gentium Acquisition, as well as the fair value at the acquisition date of the noncontrolling interests in Gentium, are summarized below (in thousands):
	Cash and cash equivalents	$	28,410
	Short-term deposit	5,418
	Accounts receivable (1)	13,855
	Inventories	13,525
	Prepaid and other current assets	1,383
	Intangible assets	960,350
	Goodwill	308,642
	Deferred tax assets	22,999
	Property, plant and equipment	10,201
	Other long-term assets	431
	Accounts payable	(11,778		)
	Accrued expenses	(51,477		)
	Income taxes payable	(502		)
	Other long-term liabilities	(654		)
	Debt (current and long-term)	(2,351		)
	Deferred tax liabilities	(304,788		)
	Noncontrolling interests	(136,578		)
	Total acquisition consideration	$	857,086
	___________________
	-1	The estimated fair value of trade receivables acquired was $13.9 million and the gross contractual amount was $14.9 million, of which we expect that $1.0 million will be uncollectible.
	The intangible assets as of the closing date of the Gentium Acquisition included (in thousands):
	Finite-lived intangible assets:
	Currently marketed product:
	Defibrotide VOD (Non Americas)	$	719,500
	Manufacturing contracts	14,500
	Tradename	350
	Total finite-lived intangible assets	734,350
	IPR&D:
	Defibrotide VOD Prophylaxis	168,000
	Defibrotide VOD (Americas)	58,000
	Total IPR&D	226,000
	Total intangible assets	$	960,350
	The fair value of the currently marketed product was determined using the income approach. The income approach explicitly recognizes that the fair value of an asset is premised upon the expected receipt of future economic benefits such as earnings and cash inflows based on current sales projections and estimated costs for each product line. Indications of value were developed by discounting these benefits to their present worth at a discount rate that reflects the current return requirements of the market. The fair value of the currently marketed product was capitalized as of the closing date of the Gentium Acquisition and subsequently will be amortized over the estimated remaining life of the product of approximately 16 years.
	Gentium produces active pharmaceutical ingredients, or APIs, including the defibrotide compound, urokinase, sodium heparin and sulglicotide. Other than defibrotide, these APIs are subsequently used to make the finished forms of various drugs and are distributed via supply contracts. The fair value of these supply contracts was determined using the income approach based on the expected cash flows from the projected net earnings of each API. The fair value of the API supply contracts was capitalized as of the closing date of the Gentium Acquisition and subsequently will be amortized over 4 years which approximates the remaining contractual term and reasonably expected renewal periods.
	The fair value of IPR&D was determined using the income approach, including the application of probability factors related to the likelihood of success of the respective products reaching final development and commercialization. This approach also took into consideration information and certain program-related documents and forecasts prepared by management. The fair value of IPR&D was capitalized as of the closing date of the Gentium Acquisition and is subsequently accounted for as an indefinite-lived intangible asset until completion or abandonment of the associated research and development efforts. Accordingly, during the development period after the closing of the Gentium Acquisition, these assets will not be amortized into earnings; instead, these assets will be subject to periodic impairment testing. Upon successful completion of the development process for an acquired IPR&D project, determination as to the useful life of the asset will be made. The asset would then be considered a finite-lived intangible asset and amortization of the asset into earnings would begin over the remaining estimated useful life of the asset.
	The excess of the total acquisition consideration over the fair value amounts assigned to the assets acquired and the liabilities assumed represents the goodwill amount resulting from the Gentium Acquisition. We believe that the factors that contributed to goodwill included the Gentium workforce, which will complement our clinical experience in hematology/oncology and our expertise in reaching targeted physicians who treat serious medical conditions, and the deferred tax consequences of intangible assets recorded for financial statement purposes. We do not expect any portion of this goodwill to be deductible for tax purposes.
	The noncontrolling interests at the closing date of the Gentium Acquisition comprised 2,007,452 of Gentium’s issued and outstanding ordinary shares and ADSs and options to acquire 484,097 ordinary shares of Gentium that were not subject to support agreements. The fair value of the noncontrolling interests was estimated using Gentium’s closing market price quoted on the NASDAQ Global Market on January 22, 2014.
	Pro Forma Financial Information (Unaudited)
	The following unaudited supplemental pro forma information presents our combined historical results of operations with adjustments to reflect one-time charges and amortization of fair value adjustments in the appropriate pro forma periods as if the Gentium Acquisition had been completed on January 1, 2013. These adjustments include:
	•	A (decrease)/increase in amortization expense related to the fair value of acquired identifiable intangible assets of $(0.1) million and $2.8 million for the three and six months ended June 30, 2014, respectively, and $12.3 million and $24.5 million for the three and six months ended June 30, 2013, respectively.
	•	The exclusion of acquisition-related expenses of $40.7 million for the six months ended June 30, 2014.
	•	An increase in interest expense of $1.4 million for the six months ended June 30, 2014, and $5.6 million and $11.2 million for the three and six months ended June 30, 2013, respectively, incurred on additional borrowings made to fund the Gentium Acquisition as if the borrowings had occurred on January 1, 2013.
	•	The exclusion of other non-recurring expenses of $6.6 million and $39.5 million for the three and six months ended June 30, 2014, respectively, and the inclusion of $4.5 million and $17.3 million for the three and six months ended June 30, 2013, respectively, primarily related to Gentium transaction bonus costs, the fair value step-up to acquired inventory, costs of change in control obligations and share-based compensation incurred from the acceleration of stock option vesting upon the closing date of the Gentium Acquisition.
	The unaudited pro forma results do not assume any operating efficiencies as a result of the consolidation of operations and are as follows (in thousands, except per share data):
		Three Months Ended					Six Months Ended
		June 30,					June 30,
		2014			2013		2014			2013
	Revenues	$	291,230		$	220,772	$	541,452		$	427,013
	Net income (loss) attributable to Jazz Pharmaceuticals plc	$	49,473		$	22,953	$	(28,204	)	$	37,088
	Net income (loss) per ordinary share attributable to Jazz Pharmaceuticals plc - basic	$	0.83		$	0.39	$	(0.48	)	$	0.63
Net income (loss) per ordinary share attributable to Jazz Pharmaceuticals plc - diluted	$	0.79		$	0.37	$	(0.48	)	$	0.6
Acquisition of Rights to Defibrotide in the Americas
As a result of the Gentium Acquisition, we acquired defibrotide, which is marketed under the name Defitelio in Europe. In October 2013, the European Commission granted marketing authorization under exceptional circumstances for Defitelio for the treatment of severe VOD in adults and children undergoing HSCT therapy. In March 2014, we commenced the launch of Defitelio on a rolling, country-by-country, basis in Europe. At the time of the Gentium Acquisition, Gentium had licensed to Sigma Tau Pharmaceuticals, Inc., or Sigma-Tau, the rights to commercialize defibrotide for the treatment and prevention of VOD in North America, Central America and South America, subject to receipt of marketing authorization, if any, in the applicable territory. On July 1, 2014, we entered into a definitive agreement to acquire the rights to defibrotide in the Americas from Sigma-Tau, and we completed the transaction on August 4, 2014. Please see Note 14 for additional information regarding this transaction.
Acquisition of Rights to JZP-110 (formerly known as ADX-N05)
On January 13, 2014, we entered into a definitive agreement with Aerial BioPharma, LLC, or Aerial, under which we acquired certain assets related to JZP-110, a novel compound in clinical development for the treatment of excessive daytime sleepiness in patients with narcolepsy. Under the agreement, and in exchange for an upfront initial payment from us totaling $125.0 million, we acquired worldwide development, manufacturing and commercial rights to JZP-110, other than in certain jurisdictions in Asia where SK Biopharmaceuticals Co., Ltd, or SK, retains rights. Aerial and SK are eligible to receive milestone payments, in an aggregate amount of up $272.0 million, based on development, regulatory and sales milestones and tiered royalties from high single digits to mid-teens based on potential future sales. This acquisition was accounted for as a purchase of IPR&D assets with no alternative future use. Accordingly, the $125.0 million upfront payment was charged to acquired IPR&D expense in the six months ended June 30, 2014. The assignment of the JZP-110 rights from Aerial to Jazz triggered a milestone payment of $2.0 million to SK, which was also charged to acquired IPR&D expense in the six months ended June 30, 2014.

Inventories

Inventories	6 Months Ended
	Jun. 30, 2014
Inventory Disclosure [Abstract]	'
Inventories	'
	Inventories
	Inventories consisted of the following (in thousands):
		June 30,		December 31,
		2014		2013
	Raw materials	$	3,155	$	3,506
	Work in process	12,246		10,301
	Finished goods	17,697		14,862
	Total inventories	$	33,098	$	28,669
	As of June 30, 2014, the step-up in the value of inventories acquired had been fully expensed. As of December 31, 2013, the fair value of inventories acquired included a step-up in the value of inventories of $0.2 million.

Fair_Value_Measurement

Fair Value Measurement	6 Months Ended
	Jun. 30, 2014
Fair Value Disclosures [Abstract]	'
Fair Value Measurement	'
	Fair Value Measurement
	Cash and cash equivalents consisted of the following (in thousands):
		30-Jun-14
		Amortized		Gross		Gross		Estimated		Cash
		Cost		Unrealized		Unrealized		Fair Value
				Gains		Losses
	Cash	$	268,255	$	—	$	—	$	268,255	$	268,255
		31-Dec-13
		Amortized		Gross		Gross		Estimated		Cash and
		Cost		Unrealized		Unrealized		Fair Value		Cash
				Gains		Losses				Equivalents
	Cash	$	495,990	$	—	$	—	$	495,990	$	495,990
	Time deposits	140,514		—		—		140,514		140,514
	Totals	$	636,504	$	—	$	—	$	636,504	$	636,504
	Cash equivalents are considered available-for-sale. We use the specific-identification method for calculating realized gains and losses on securities sold and include them in interest expense, net in the condensed consolidated statements of operations.
	The following table summarizes, by major security type, our available-for-sale securities and liabilities as of December 31, 2013 that were measured at fair value on a recurring basis and were categorized using the fair value hierarchy (in thousands):
		30-Jun-14				31-Dec-13
		Significant Other		Total		Significant		Total
		Observable		Estimated		Other		Estimated
		Inputs		Fair Value		Observable		Fair Value
		(Level 2)				Inputs
						(Level 2)
	Assets:
	Available-for-sale securities
	Time deposits	$	—	$	—	$	140,514	$	140,514
	Liabilities:
	Contingent consideration	$	—	$	—	$	50,000	$	50,000
	As of December 31, 2013, our available-for-sale securities included time deposits which were measured at fair value using Level 2 inputs and their carrying values were approximately equal to their fair values. There were no transfers between the different levels of the fair value hierarchy in 2014 or in 2013.
	As of June 30, 2014, the estimated fair value of the $899.9 million principal amount of our term loans was $901.0 million and the carrying amount was $894.3 million. The fair value was determined using quotes from the administrative agent of our credit facility that are based on the bid/ask prices of our new term loans (Level 2). For additional information related to our term loans, see Note 7. The fair value of the borrowings under the revolving credit facility and other borrowings approximates book value based on the borrowing rates currently available for variable rate loans (Level 2).

Certain_Balance_Sheet_Items

Certain Balance Sheet Items	6 Months Ended
	Jun. 30, 2014
Certain Balance Sheet Items [Abstract]	'
Certain Balance Sheet Items	'
	Certain Balance Sheet Items
	Property and equipment consisted of the following (in thousands):
		June 30,			December 31,
		2014			2013
	Construction-in-progress	$	18,041		$	4,388
	Computer software	8,476			7,960
	Machinery and equipment	7,495			417
	Leasehold improvements	6,753			4,587
	Computer equipment	6,550			5,610
	Furniture and fixtures	2,279			1,897
	Land and buildings	1,686			—
	Subtotal	51,280			24,859
	Less accumulated depreciation and amortization	(12,818		)	(10,613		)
	Property and equipment, net	$	38,462		$	14,246
	Accrued liabilities consisted of the following (in thousands):
		June 30,			December 31,
		2014			2013
	Rebates and other sales deductions	$	45,871		$	38,772
	Employee compensation and benefits	39,782			31,829
	Sales returns reserve	17,214			21,110
	Royalties	7,328			6,082
	Accrued interest	6,174			4,150
	Accrued construction-in-progress	3,298			450
	Professional fees	3,209			5,225
	Other	19,967			12,100
	Total accrued liabilities	$	142,843		$	119,718

Goodwill_and_Intangible_Assets

Goodwill and Intangible Assets	6 Months Ended
	Jun. 30, 2014
Goodwill and Intangible Assets Disclosure [Abstract]	'
Goodwill and Intangible Assets	'
	Goodwill and Intangible Assets
	The gross carrying amount of goodwill was as follows (in thousands):
	Balance at December 31, 2013	$	450,456
	Goodwill arising from the Gentium Acquisition	308,642
	Foreign exchange	1,216
	Balance at June 30, 2014	$	760,314
	The gross carrying amounts and net book values of our intangible assets were as follows (in thousands):
		June 30, 2014									December 31, 2013
		Remaining		Gross		Accumulated			Net Book		Gross		Accumulated			Net Book
		Weighted-		Carrying		Amortization			Value		Carrying		Amortization			Value
		Average Useful		Amount							Amount
		Life
		(In years)
	Acquired developed technologies	13.3		$	1,632,060	$	(227,380	)	$	1,404,680	$	957,089	$	(179,225	)	$	777,864
	Manufacturing contracts	3.6		14,612		(1,610		)	13,002		—		—			—
	Trademarks	0.5		2,953		(2,619		)	334		2,600		(2,327		)	273
	Total finite-lived intangible assets			1,649,625		(231,609		)	1,418,016		959,689		(181,552		)	778,137
	Acquired IPR&D assets			261,988		—			261,988		34,259		—			34,259
	Total intangible assets			$	1,911,613	$	(231,609	)	$	1,680,004	$	993,948	$	(181,552	)	$	812,396
	The increase in the gross carrying amount of intangible assets as of June 30, 2014 compared to December 31, 2013 reflects the acquisition of the Gentium intangible assets, as described in Note 2, and the positive impact of foreign currency exchange which is primarily due to the strengthening of the Euro against the U.S. dollar.
	The assumptions and estimates used to determine future cash flows and remaining useful lives of our intangible and other long-lived assets are complex and subjective. They can be affected by various factors, including external factors, such as industry and economic trends, and internal factors such as changes in our business strategy and our forecasts for specific product lines.
	In the three and six months ended June 30, 2014, we recorded an impairment charge of $32.8 million on acquired developed technologies related to certain products acquired as part of our acquisition of EUSA Pharma Inc. in June 2012. We report sales of these products under "Other” products. The impairment charge resulted from the reorganization of our operations in Europe to focus on our hematology/oncology franchise following the Gentium Acquisition.  We determined the fair value of the acquired developed technologies using a discounted cash flow approach, which contains significant unobservable inputs and therefore is considered a Level 3 fair value measurement. The unobservable inputs in the analysis included future cash flow projections and a discount rate.
	Based on finite-lived intangible assets recorded as of June 30, 2014, and assuming the underlying assets will not be further impaired and that we will not change the expected lives of the assets, future amortization expenses were estimated as follows (in thousands):
	Year Ending December 31,	Estimated
		Amortization
		Expense
	2014 (remainder)	$	62,124
	2015	119,472
	2016	115,121
	2017	115,030
	2018	111,525
	Thereafter	894,744
	Total	$	1,418,016

LongTerm_Debt

Long-Term Debt	6 Months Ended
	Jun. 30, 2014
Debt Disclosure [Abstract]	'
Long-Term Debt	'
	Long-Term Debt
	The following table summarizes the carrying amount of our borrowings (in thousands):
		June 30, 2014		December 31, 2013
	Term loan facility	$	894,328	$	549,976
	Revolving credit facility	300,000		—
	Other borrowings	2,105		—
	Total debt	1,196,433		549,976
	Less current portion	9,473		5,572
	Total long-term debt	$	1,186,960	$	544,404
	Amendment of Credit Facility and Term Loan Refinancing
	In June 2012, Jazz Pharmaceuticals plc, as guarantor, and certain of its wholly owned subsidiaries, as borrowers, entered into a credit agreement providing for $475.0 million principal amount of term loans and a $100.0 million revolving credit facility. On June 13, 2013, we amended the credit agreement to provide for $557.2 million principal amount of new term loans and a $200.0 million revolving credit facility that replaced the $100.0 million revolving credit facility. We used a portion of the proceeds from these new term loans to refinance in full the $457.2 million aggregate principal amount of outstanding term loans under the credit agreement prior to the amendment. As a result of the June 2013 amendment, interest rate margins on the term loans and the revolving loans were reduced by 150 basis points.
	On January 23, 2014, we entered into a second amendment to the credit agreement to provide for (i) a tranche of incremental term loans in the aggregate principal amount of $350.0 million, (ii) a tranche of term loans to refinance the $554.4 million aggregate principal amount of term loans previously outstanding under the amended credit agreement, or the prior term loans, in their entirety, and (iii) a $425.0 million revolving credit facility that replaced the $200.0 million revolving credit facility. We used the proceeds from the incremental term loans and $300.0 million of loans under the revolving credit facility, together with cash on hand, to purchase the Gentium ordinary shares and ADSs properly tendered and accepted for payment on the January 22, 2014 expiration of the initial tender offer period relating to the Gentium Acquisition. The January 2014 amendment also reduced the interest rate margins on the terms loans by 25 basis points.
	The term loans under the current credit agreement mature on June 12, 2018 and the current revolving credit facility terminates, and any loans outstanding thereunder become due and payable, on June 12, 2017.
	The term loans under the current credit agreement, as amended in January 2014, bear interest, at our option, at a rate equal to either the LIBOR, plus an applicable margin of 2.50% per annum (subject to a 0.75% LIBOR floor), or the prime lending rate, plus an applicable margin equal to 1.50% per annum (subject to a 1.75% prime rate floor). Borrowings under the current revolving credit facility bear interest, at our option, at a rate equal to either the LIBOR, plus an applicable margin of 2.50% per annum, or the prime lending rate, plus an applicable margin equal to 1.50% per annum, subject to reduction by 0.25% or 0.50% based upon our secured leverage ratio. The revolving credit facility has a commitment fee payable on the undrawn amount ranging from 0.25% to 0.50% per annum based upon our secured leverage ratio.
	The borrowers’ obligations under the current credit agreement and any hedging or cash management obligations entered into with a lender or an affiliate of a lender are guaranteed by us and certain of our subsidiaries and are secured by substantially all of our, the borrowers’ and the subsidiary guarantors’ assets.
	We may make voluntary prepayments of principal at any time without payment of a premium. We are required to make mandatory prepayments of the term loans (without payment of a premium) with (1) net cash proceeds from certain non-ordinary course asset sales (subject to reinvestment rights and other exceptions), (2) net cash proceeds from issuances of debt (other than certain permitted debt), (3) 50% of our excess cash flow as defined in the current credit agreement (subject to decrease to 25% if our secured leverage ratio is equal to or less than 2.25 to 1.00 and greater than 1.25 to 1.00 or 0% if our secured leverage ratio is equal to or less than 1.25 to 1.00), and (4) casualty proceeds and condemnation awards (subject to reinvestment rights and other exceptions).
	Principal repayments of the term loans, which are due quarterly, began in March 2014 and are equal to 1.0% per annum of the original principal amount of $904.4 million with any remaining balance payable on the final maturity date.
	The credit agreement contains customary representations and warranties and customary affirmative and negative covenants applicable to Jazz Pharmaceuticals plc and its restricted subsidiaries, including, among other things, restrictions on indebtedness, liens, investments, mergers, dispositions, prepayment of other indebtedness and dividends and other distributions. The credit agreement also contains a financial covenant that requires Jazz Pharmaceuticals plc and its restricted subsidiaries to maintain a maximum secured leverage ratio. We were, as of June 30, 2014, and are currently in compliance with this financial covenant.
	The refinancing of the term loans involved multiple lenders who were considered members of a loan syndicate. In determining whether the refinancing was to be accounted for as a debt extinguishment or modification, we considered whether the creditors remained the same or changed and whether the change in debt terms was substantial. The debt terms were considered substantially different if the present value of the cash flows of the new term loans was at least 10% different from the present value of the remaining cash flows of the original term loans, or the 10% Test. We performed a separate 10% Test for each individual creditor participating in the loan syndication. When there was a change in principal balance for individual creditors, in applying the 10% Test, we used the cash flows related to the lowest common principal balance, or the Net Method. Under the Net Method, any principal in excess of a creditor’s reinvested principal balance was treated as a new, separate debt issuance. The refinancing was accounted for as a modification as the change in debt terms was determined to not be substantial using the 10% Test.
	Deferred financing costs of $21.7 million and an original issue discount of $6.1 million were associated with modified and new debt and will be amortized to interest expense using the interest method over the life of the term loans. As of June 30, 2014, the interest rate on the term loans was 3.25% and the effective interest rate was 4.1%.
	As the borrowing capacity relating to each creditor under the current revolving credit facility was greater than that under the original revolving credit facility, deferred financing costs totaling $5.4 million were associated with the new arrangement and are being amortized to interest expense on a straight-line basis over the life of the facility. As of June 30, 2014, we had borrowed $300.0 million under the revolving credit facility and the interest rate on these borrowings at that date was 2.65%.
	Scheduled maturities with respect to our long-term debt are as follows (in thousands):
	Year Ending December 31,	Scheduled Long-Term Debt Maturities
	2014 (remainder)	$	4,736
	2015	9,475
	2016	9,481
	2017	309,487
	2018	868,510
	Thereafter	296
	Total	$	1,201,985

Commitments_and_Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2014
Commitments and Contingencies Disclosure [Abstract]	'
Commitments and Contingencies	'
	Commitments and Contingencies
	Indemnification
	In the normal course of business, we enter into agreements that contain a variety of representations and warranties and provide for general indemnification, including indemnification associated with product liability or infringement of intellectual property rights. Our exposure under these agreements is unknown because it involves future claims that may be made but have not yet been made against us. To date, we have not paid any claims or been required to defend any action related to these indemnification obligations.
	We have agreed to indemnify our executive officers, directors and certain other employees for losses and costs incurred in connection with certain events or occurrences, including advancing money to cover certain costs, subject to certain limitations. The maximum potential amount of future payments we could be required to make under the indemnification obligations is unlimited; however, we maintain insurance policies that may limit our exposure and may enable us to recover a portion of any future amounts paid. Assuming the applicability of coverage and the willingness of the insurer to assume coverage, and subject to certain retention, loss limits and other policy provisions, we believe the fair value of these indemnification obligations is not significant. Accordingly, we did not recognize any liabilities relating to these obligations as of June 30, 2014 and December 31, 2013. No assurances can be given that the covering insurers will not attempt to dispute the validity, applicability, or amount of coverage without expensive litigation against these insurers, in which case we may incur substantial liabilities as a result of these indemnification obligations.
	Lease and Other Commitments
	We have noncancelable operating leases for our office buildings and we are obligated to make payments under noncancelable operating leases for automobiles used by our sales force. Future minimum lease payments under our noncancelable operating leases at June 30, 2014 were as follows (in thousands):
	Year Ending December 31,	Lease
		Payments
	2014 (remainder)	$	5,414
	2015	10,021
	2016	7,292
	2017	3,956
	2018	910
	Thereafter	174
	Total	$	27,767
	As of June 30, 2014, we had $37.4 million of noncancelable purchase commitments due within one year, primarily related to agreements with third party manufacturers.
	Legal Proceedings
	We are involved in several legal proceedings, including the following matters:
	Xyrem ANDA Matters: On October 18, 2010, we received a Paragraph IV Patent Certification notice, or Paragraph IV Certification, from Roxane that it had submitted an ANDA to the FDA requesting approval to market a generic version of Xyrem. Roxane’s initial Paragraph IV Certification alleged that all five patents then listed for Xyrem in the FDA’s publication “Approved Drug Products with Therapeutic Equivalence Evaluations,” or Orange Book, on the date of the Paragraph IV Certification are invalid, unenforceable or not infringed by Roxane’s proposed generic product. On November 22, 2010, we filed a lawsuit against Roxane in response to Roxane’s Paragraph IV Certification in the U.S. District Court for the District of New Jersey, or the District Court. We are seeking a permanent injunction to prevent Roxane from introducing a generic version of Xyrem that would infringe our patents. In accordance with the Drug Price Competition and Patent Term Restoration Act of 1984, or Hatch-Waxman Act, as a result of our having filed a timely lawsuit against Roxane, FDA approval of Roxane’s ANDA had been stayed until April 18, 2013, which was 30 months after our October 18, 2010 receipt of Roxane’s initial Paragraph IV Certification, but that stay has expired. Additional patents covering Xyrem have issued since the original suit against Roxane was filed, and cases involving some of these patents have been consolidated with the original action.
	In December 2013, the District Court permitted Roxane to amend its answer in the consolidated case to allege additional equitable defenses, and the parties have been given additional time for discovery on those new defenses. In addition, in March 2014, the District Court granted our motion to bifurcate and stay the portion of the lawsuit regarding certain patents covering the distribution system for Xyrem. Although no trial date for the case has been scheduled, based on the District Court’s current scheduling order, we anticipate that trial on the patents that are not subject to the court’s stay could occur as early as the first quarter of 2015. We do not have any estimate of a possible trial date for trial on the stayed patents. The actual timing of events in this litigation may be significantly earlier or later than contemplated by the scheduling order or than we currently anticipate, and we cannot predict the timing or outcome of events in this litigation.
	On April 1, 2014, we received an additional Paragraph IV Certification from Roxane alleging that a tenth patent listed in the Orange Book for Xyrem in December 2013 is invalid or not infringed. We have not yet responded to this Paragraph IV Certification and cannot predict the timing or outcome of this matter or its impact on the other ongoing proceedings with Roxane.
	On December 10, 2012, we received a Paragraph IV Certification notice from Amneal Pharmaceuticals, LLC, or Amneal, that it had submitted an ANDA to the FDA requesting approval to market a generic version of Xyrem. Amneal’s initial Paragraph IV Certification alleged that seven patents listed for Xyrem in the Orange Book are not infringed by Amneal’s proposed generic product and that an eighth patent listed in the Orange Book for Xyrem is invalid. On December 13, 2012, we received a supplemental Paragraph IV Certification notice alleging that a ninth patent listed in the Orange Book for Xyrem is invalid. On January 18, 2013, we filed a lawsuit against Amneal in response to Amneal’s Paragraph IV Certifications in the District Court seeking a permanent injunction to prevent Amneal from introducing a generic version of Xyrem that would infringe our patents. An additional patent covering Xyrem issued since the original suit was filed and the case involving this patent has been consolidated with the original case.
	On April 7, 2014, we received an additional Paragraph IV Certification from Amneal alleging that a tenth patent listed in the Orange Book for Xyrem in December 2013 is invalid. We filed suit against Amneal on this patent in the District Court on May 20, 2014 and cannot predict the timing or outcome of this matter or its impact on the other ongoing proceedings with Amneal.
	On November 21, 2013, we received a Paragraph IV Certification notice from Par Pharmaceutical, Inc., or Par, that it had submitted an ANDA to the FDA requesting approval to market a generic version of Xyrem. Par’s Paragraph IV Certification alleged that ten patents listed in the Orange Book for Xyrem are invalid, unenforceable, and/or will not be infringed by Par’s proposed generic product. On December 27, 2013, we filed a lawsuit against Par in the District Court in response to Par’s Paragraph IV Certification seeking a permanent injunction to prevent Par from introducing a generic version of Xyrem that would infringe our patents.
	On April 23, 2014, Amneal asked the District Court to consolidate its case with the Par case, stating that both cases would proceed on the schedule for the Par case. The District Court granted this request on May 5, 2014. The order consolidating the cases provides that Amneal’s 30-month stay period will be extended to coincide with the date of Par’s 30-month stay period, calculated to be May 20, 2016. As a result, FDA’s approval of both ANDAs is stayed until the earlier of (i) May 20, 2016, or (ii) a District Court decision finding that the identified patents are invalid, unenforceable or not infringed. We cannot predict the timing or outcome of events in the consolidated case.
	On June 4, 2014, we received a Paragraph IV Certification notice from Ranbaxy Laboratories Limited, or Ranbaxy, that it had submitted an ANDA to the FDA requesting approval to market a generic version of Xyrem. Ranbaxy’s Paragraph IV Certification alleged that eleven patents listed in the Orange Book for Xyrem are invalid, unenforceable, and/or will not be infringed by Ranbaxy’s proposed generic product. On June 6, 2014, we received an amended Paragraph IV Certification notice from Ranbaxy adding a twelfth patent listed in the Orange Book for Xyrem. On July 15, 2014, we filed a lawsuit against Ranbaxy in the District Court in response to Ranbaxy’s Paragraph IV Certification seeking a permanent injunction to prevent Ranbaxy from introducing a generic version of Xyrem that would infringe our patents. We cannot predict the timing or outcome of events in this litigation.
	Between late June and early August 2014, petitions for CBM post-grant patent review by the PTAB were filed by certain of the ANDA filers with respect to the validity of our patents covering the distribution system for Xyrem. To date, these petitions have not been accepted by the PTAB. We cannot predict the outcome of the PTAB’s decision on whether to institute any of the petitioned CBM review proceedings, whether additional post-grant patent review challenges will be filed, the outcome of any CBM review or other proceeding if the PTAB decides to institute one or more CBM review or other proceedings, or the impact any CBM review or other proceeding might have on ongoing ANDA litigation proceedings.
	FazaClo ANDA Matters: Azur Pharma Public Limited Company, or Azur Pharma, received Paragraph IV Certification notices from three generics manufacturers, Barr Laboratories, Inc., or Barr, Novel Laboratories, Inc., or Novel, and Mylan Pharmaceuticals, Inc., or Mylan, indicating that ANDAs had been filed with the FDA requesting approval to market generic versions of FazaClo® (clozapine, USP) LD orally disintegrating clozapine tablets. Azur Pharma and CIMA Labs Inc., or CIMA, a subsidiary of Teva Pharmaceutical Industries Limited, or Teva, our licensor and the entity whose drug-delivery technology is incorporated into FazaClo LD, filed a lawsuit in response to each certification claiming infringement based on such certification against Barr on August 21, 2008, against Novel on November 25, 2008 and against Mylan on July 23, 2010. Each case was filed in the U.S. District Court for the District of Delaware, or the Delaware Court. On July 6, 2011, CIMA, Azur Pharma and Teva, which had acquired Barr, entered into an agreement settling the patent litigation and Azur Pharma granted a sublicense to an affiliate of Teva of Azur Pharma’s rights to have manufactured, market and sell a generic version of both FazaClo LD and FazaClo HD, as well as an option for supply of authorized generic product. The sublicense for FazaClo LD commenced in July 2012, and the sublicense for FazaClo HD will commence in May 2015, or earlier upon the occurrence of certain events. Teva exercised its option for supply of an authorized generic product for FazaClo LD and launched the authorized generic product at the end of August 2012. The Novel and Mylan matters had been stayed pending reexamination of the patents in the lawsuits. In September 2013 and January 2014, reexamination certificates were issued for the two patents-in-suit, and the patentability of the claims of the patents confirmed. The Delaware Court lifted the stay of litigation in the two cases in March 2014. Trial is currently set for the third quarter of 2015, but we cannot predict the timing or outcome of this litigation.
	Cutler Matter: On October 19, 2011, Dr. Neal Cutler, one of the original owners of FazaClo, filed a complaint against Azur Pharma and one of its subsidiaries, as well as Avanir Pharmaceuticals, Inc., or Avanir, in the California Superior Court in the County of Los Angeles, or the Superior Court. The complaint alleges that Azur Pharma and its subsidiary breached certain contractual obligations. Azur Pharma acquired rights to FazaClo from Avanir in 2007. The complaint alleges that as part of the acquisition of FazaClo, Azur Pharma’s subsidiary agreed to assume certain contingent payment obligations to Dr. Cutler. The complaint further alleges that certain contingent payments are due because revenue thresholds have been achieved, entitling Dr. Cutler to a $10.5 million and an additional $25.0 million contingent payment, plus unspecified punitive damages and attorneys’ fees. In March 2012, the Superior Court granted our petition to compel arbitration of the dispute in New York and stayed the Superior Court litigation. In July 2012, the arbitrator dismissed the arbitration on the grounds that the parties’ dispute falls outside of the scope of the arbitration clause in the applicable contract. That ruling was affirmed by the California Court of Appeal in January 2014, and the case was remanded to Superior Court. We cannot predict the timing or outcome of this litigation.
	Shareholder Litigation Matter: In January 2014, we became aware of a purported class action lawsuit filed in the U.S. District Court for the Southern District of New York in connection with the Gentium Acquisition.  The lawsuit, captioned Xavion Jyles, Individually and on Behalf of All Others Similarly Situated v. Gentium S.P.A. et al., names Gentium, each of the Gentium’s directors, us and our Italian subsidiary as defendants. The lawsuit alleges, among other things, that Gentium’s directors breached their fiduciary duties to Gentium’s shareholders in connection with the Gentium tender offer agreement that Gentium entered into with us and our Italian subsidiary valuing Gentium ordinary shares and ADSs at $57.00 per share, and that we and our Italian subsidiary violated Sections 14(e) and 20(a) of the Securities Exchange Act of 1934, as amended, by allegedly overseeing Gentium’s preparation of an allegedly false and misleading Section 14D-9 Solicitation/Recommendation Statement. The lawsuit seeks, among other relief, class action status, rescission, and unspecified costs, attorneys’ fees and other expenses. We cannot predict the timing or outcome of this matter.
	From time to time we are involved in legal proceedings arising in the ordinary course of business. We believe there is no other litigation pending that could have, individually or in the aggregate, a material adverse effect on our results of operations or financial condition.
	Other Contingencies
	We have not previously submitted pricing data for our two radiopharmaceutical products, ProstaScint® (capromab pendetide) and Quadramet® (samarium sm 153 lexidronam injection), for Medicaid and 340B programs.  We have been engaged in interactions with the Centers for Medicare and Medicaid Services, or CMS, and a trade group, the Council on Radionuclides and Radiopharmaceuticals, or CORAR, regarding the reporting of Medicaid pricing data and paying Medicaid rebates for radiopharmaceutical products.  For ProstaScint, we plan to begin making any required reports when CMS provides guidance on this requirement and reporting methodology, which is currently expected later in 2014.  We sold Quadramet to a third party in December 2013, but have retained any liabilities related to sales of the product during prior periods.  In addition to the discussions with CMS as part of CORAR, we have had separate discussions with CMS directly regarding Quadramet.  We are currently unable to predict whether price reporting and rebates will be required for ProstaScint and Quadramet and, if so, for what period they will be required.  The initiation of any reporting of Medicaid pricing data for ProstaScint and Quadramet could result in retroactive 340B ceiling price liability for these two products as well as prospective 340B ceiling price obligations for ProstaScint. We are currently unable to reasonably estimate an amount or range of a contingent loss. Any material liability resulting from radiopharmaceutical price reporting would negatively impact our financial results.

Shareholders_Equity

Shareholders' Equity	6 Months Ended
	Jun. 30, 2014
Stockholders' Equity Note [Abstract]	'
Shareholders' Equity	'
	Shareholders’ Equity
	The following tables present a reconciliation of our beginning and ending balances in shareholders’ equity for the six months ended June 30, 2014 and 2013, respectively (in thousands):
		Attributable to:
		Jazz Pharmaceuticals plc			Noncontrolling interests			Total Shareholders' Equity
	Shareholders' equity at January 1, 2014	$	1,295,534		$	—		$	1,295,534
	Noncontrolling interests from the Gentium Acquisition				136,578			136,578
	Acquisition of noncontrolling interests	(1,517		)	(135,123		)	(136,640		)
	Issuance of ordinary shares in conjunction with employee equity incentive and purchase plans and warrant exercises	31,642			—			31,642
	Employee withholding taxes related to share-based awards	(10,551		)	—			(10,551		)
	Share-based compensation	32,476			—			32,476
	Tax benefit from employee share options	792			—			792
	Shares repurchased	(23,487		)	—			(23,487		)
	Other comprehensive income	3,793			3			3,796
	Net loss	(48,991		)	(1,062		)	(50,053		)
	Shareholders' equity at June 30, 2014	$	1,279,691		$	396		$	1,280,087
		Jazz Pharmaceuticals plc
	Shareholders' equity at January 1, 2013	$	1,121,292
	Issuance of ordinary shares in conjunction with employee equity incentive and purchase plans and warrant exercises	15,463
	Employee withholding taxes related to share-based awards	(1,597		)
	Share-based compensation	20,089
	Tax benefit from employee share options	—
	Shares repurchased	(53,578		)
	Other comprehensive income	(11,826		)
	Net income	85,610
	Shareholders' equity at June 30, 2013	$	1,175,453
	Share Repurchase Program
	In May 2013, our board of directors authorized a share repurchase program pursuant to which we may repurchase a number of ordinary shares having an aggregate repurchase price of up to $200 million, exclusive of any brokerage commissions. The authorization became effective immediately and has no set expiration date. Under this authorization, we may repurchase our ordinary shares through open market purchases, privately negotiated purchases or a combination of these transactions. The timing and amount of repurchases will depend on a variety of factors, including the price of our ordinary shares, alternative investment opportunities, restrictions under the amended credit agreement, corporate and regulatory requirements and market conditions. Share repurchases may be suspended or discontinued at any time without prior notice. In the three and six months ended June 30, 2014, we spent a total of $23.5 million to purchase 0.2 million of our ordinary shares under the share repurchase program at an average total purchase price, including commissions, of $127.96 per share. All ordinary shares repurchased by the company were canceled. As of June 30, 2014, the remaining amount authorized under the share repurchase program was $40.1 million.
	Accumulated Other Comprehensive Income
	The components of accumulated other comprehensive income as of June 30, 2014 and December 31, 2013 were as follows (in thousands):
		Foreign			Total
		Currency			Accumulated
		Translation			Other
		Adjustments			Comprehensive
					Income
	Balance at December 31, 2013	$	56,153		$	56,153
	Other comprehensive income	3,793			3,793
	Balance at June 30, 2014	$	59,946		$	59,946
	During the six months ended June 30, 2014, other comprehensive income reflects foreign currency translation adjustments which are primarily due to the strengthening of the Euro against the U.S. dollar.

ShareBased_Compensation

Share-Based Compensation	6 Months Ended
	Jun. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Share-Based Compensation	'
	Share-Based Compensation
	Share-based compensation expense related to share options, RSUs and grants under our ESPP was as follows (in thousands):
		Three Months Ended						Six Months Ended
		June 30,						June 30,
		2014			2013			2014			2013
	Selling, general and administrative	$	14,042		$	9,539		$	25,217		$	16,544
	Research and development	3,226			1,479			5,685			2,522
	Cost of product sales	1,284			488			1,465			1,197
	Total share-based compensation expense, pre-tax	18,552			11,506			32,367			20,263
	Tax benefit from share-based compensation expense	(5,416		)	(3,535		)	(9,702		)	(6,348		)
	Total share-based compensation expense, net of tax	$	13,136		$	7,971		$	22,665		$	13,915
	Share Options
	The table below shows the number of shares underlying options granted to purchase our ordinary shares, the weighted-average assumptions used in the Black-Scholes option pricing model and the resulting weighted-average grant date fair value of share options granted:
		Three Months Ended						Six Months Ended
		June 30,						June 30,
		2014			2013			2014			2013
	Shares underlying options granted (in thousands)	101			161			807			1,172
	Grant date fair value	$	53.26		$	27.53		$	61.85		$	27.72
	Black-Scholes option pricing model assumption information:
	Volatility	45		%	58		%	46		%	59		%
	Expected term (years)	4.3			4.4			4.3			4.4
	Range of risk-free rates	1.3-1.4%			0.5-0.8%			1.1-1.4%			0.5-0.8%
	Expected dividend yield	—		%	—		%	—		%	—		%
	Restricted Stock Units
	The table below shows the number of RSUs granted covering an equal number of our ordinary shares and the weighted-average grant date fair value of RSUs granted:
		Three Months Ended						Six Months Ended
		June 30,						June 30,
		2014			2013			2014			2013
	RSUs granted (in thousands)	51			75			392			522
	Grant date fair value	$	141.36		$	59.43		$	162.48		$	59
	The fair value of RSUs is determined on the date of grant based on the market price of our ordinary shares on that date. The fair value of RSUs is recognized as expense ratably over the vesting period of four years.
	As of June 30, 2014, compensation cost not yet recognized related to unvested share options and RSUs was $78.4 million and $79.5 million, respectively, which is expected to be recognized over a weighted-average period of 2.6 years and 2.7 years, respectively.

Related_Party_Transactions

Related Party Transactions	6 Months Ended
	Jun. 30, 2014
Related Party Transactions [Abstract]	'
Related Party Transactions	'
	Related Party Transactions
	In February 2014, certain holders of warrants to purchase 947,867 of our ordinary shares exercised the warrants in full for an aggregate cash purchase price payable to us of $3.8 million. The warrant holders are entities affiliated with one of our directors. In accordance with the terms of an existing investor rights agreement with the warrant holders, we registered the resale of the ordinary shares underlying the warrants and, pursuant to such agreement, we paid expenses of approximately $0.1 million in connection with the resale registration.

Segment_and_Other_Information

Segment and Other Information	6 Months Ended
	Jun. 30, 2014
Segment Reporting [Abstract]	'
Segment and Other Information	'
	Segment and Other Information
	Our operating segment is reported in a manner consistent with the internal reporting provided to the chief operating decision maker, or CODM. Our CODM has been identified as our chief executive officer. We have determined that we operate in one business segment which is the development and commercialization of specialty pharmaceutical products. The following table presents a summary of total revenues (in thousands):
		Three Months Ended							Six Months Ended
		June 30,							June 30,
		2014			2013				2014			2013
	Xyrem® (sodium oxybate) oral solution	$	191,366		$	133,742			$	351,744		$	251,268
	Erwinaze® (asparaginase Erwinia chrysanthemi)/Erwinase®	47,869			44,860				94,789			86,676
	Defitelio® (defibrotide)/defibrotide	20,244			—				32,453			—
	Prialt® (ziconotide) intrathecal infusion	5,831			4,694				10,140			9,680
	Psychiatry	11,732			11,764				21,598			29,414
	Other	12,058			11,504				23,362			24,178
	Product sales, net	289,100			206,564				534,086			401,216
	Royalties and contract revenues	2,130			1,688				4,063			3,273
	Total revenues	$	291,230		$	208,252			$	538,149		$	404,489
	The following table presents a summary of total revenues attributed to geographic sources (in thousands):
		Three Months Ended							Six Months Ended
		June 30,							June 30,
		2014			2013				2014			2013
	United States	$	247,525		$	191,274			$	462,481		$	368,185
	Europe	30,687			13,074				55,030			27,436
	All other	13,018			3,904				20,638			8,868
	Total revenues	$	291,230		$	208,252			$	538,149		$	404,489
	The following table presents a summary of the percentage of total revenues from customers that represented more than 10% of our total revenues:
		Three Months Ended					Six Months Ended
		June 30,					June 30,
		2014		2013			2014			2013
	Express Scripts	65	%	64	%		65	%		62	%
	Accredo	13	%	18	%		14	%		17	%
	The following table presents total long-lived assets, consisting of property and equipment, by location (in thousands):
		June 30,			December 31,
		2014			2013
	Ireland	$	19,481		$	5,799
	Italy	10,043			—
	United States	8,021			7,734
	Other	917			713
	Total long-lived assets	$	38,462		$	14,246

Income_Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2014
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	Income Taxes
	Our income tax provision for the three and six months ended June 30, 2014 was $19.4 million and $36.4 million, respectively, compared to $23.6 million and $41.2 million for the same periods in 2013. The effective tax rates for the three months ended June 30, 2014 and 2013 were 30.7% and 35.9%, respectively. After adjusting the loss before income tax provision for the six months ended June 30, 2014 by excluding an upfront license fee and milestone payment of $127.0 million for rights to JZP-110, the effective tax rate on the resulting income before income tax provision for the six months ended June 30, 2014 was 32.1%, compared to 32.5% for the same period in 2013. The decreases in the effective tax rates for the three and six months ended June 30, 2014 compared to the same periods in 2013 were primarily due to changes in income mix among the various jurisdictions in which we operate.  The effective tax rates for the three and six months ended June 30, 2014 were higher than the Irish statutory rate of 12.5% primarily due to income taxable at a rate higher than the Irish statutory rate, uncertain tax positions, current year losses in some jurisdictions for which no tax benefit is available, and various expenses not deductible for tax purposes. No provision for income tax in Ireland has been recognized on undistributed earnings of our foreign subsidiaries because we consider such earnings to be indefinitely reinvested.
	Our deferred tax assets are comprised primarily of U.S. federal and state net operating loss carryforwards and tax credit carryforwards, foreign net operating loss carryforwards and other temporary differences. We maintain a valuation allowance against certain U.S. state and foreign deferred tax assets. Each reporting period, we evaluate the need for a valuation allowance on our deferred tax assets by jurisdiction.
	We are required to recognize the financial statement effects of a tax position when it is more likely than not, based on the technical merits, that the position will be sustained upon examination. As a result, we have established a liability for certain tax benefits which we judge may not be sustained upon examination. We file income tax returns in Ireland, in the United States (both at the federal level and in various state jurisdictions) and in certain other foreign jurisdictions, all of which typically have three to four tax years open at any point in time. Because of our net operating loss carryforwards and tax credit carryforwards, substantially all of our tax years remain open to federal, state, and foreign tax examination. Certain of our subsidiaries are currently under examination by the French tax authorities for fiscal years 2010, 2011 and 2012 and by the U.S. Internal Revenue Service for fiscal year 2010. We do not anticipate that the amount of our existing liability for unrecognized tax benefits will significantly change within the next 12 months.

Subsequent_Event

Subsequent Event	6 Months Ended
	Jun. 30, 2014
Subsequent Events [Abstract]	'
Subsequent Event	'
	Subsequent Event
	At the time of the Gentium Acquisition, Gentium had licensed to Sigma-Tau the rights to commercialize defibrotide for the treatment and prevention of VOD in North America, Central America and South America, subject to receipt of marketing authorization, if any, in the applicable territory. On July 1, 2014, we entered into a definitive agreement to acquire the rights to defibrotide in the Americas from Sigma-Tau. Pursuant to the agreement, upon the closing of the transaction on August 4, 2014, we paid Sigma-Tau an upfront payment of $75.0 million. This transaction is being accounted for as a purchase of IPR&D assets with no alternative future use. Accordingly, the $75.0 million upfront payment was charged to acquired IPR&D expense upon closing of the transaction. Sigma-Tau is also eligible to receive milestone payments of $25.0 million upon the acceptance for filing by the FDA of the first NDA for defibrotide for VOD and up to an additional $150.0 million based on the timing of potential FDA approval of defibrotide for VOD. We funded the upfront payment with cash on hand.

The_Company_and_Summary_of_Sig1

The Company and Summary of Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2014
Accounting Policies [Abstract]	'
Basis of Presentation	'
	Basis of Presentation
	These unaudited condensed consolidated financial statements have been prepared following the requirements of the Securities and Exchange Commission, or SEC, for interim reporting. As permitted under those rules, certain footnotes and other financial information that are normally required by U.S. generally accepted accounting principles, or GAAP, can be condensed or omitted. The information included in this Quarterly Report on Form 10-Q should be read in conjunction with the annual consolidated financial statements and accompanying notes of Jazz Pharmaceuticals plc included in its Annual Report on Form 10-K for the year ended December 31, 2013. The results of operations of the acquired Gentium business, along with the estimated fair values of the assets acquired and liabilities assumed in the transaction, have been included in our condensed consolidated financial statements since we acquired control of Gentium on January 23, 2014, which date we refer to in this report as the closing date of the Gentium Acquisition.
	In the opinion of management, these condensed consolidated financial statements have been prepared on the same basis as the annual consolidated financial statements and include all adjustments, consisting only of normal recurring adjustments, considered necessary for the fair presentation of our financial position and operating results. The results for the three and six months ended June 30, 2014 are not necessarily indicative of the results to be expected for the year ending December 31, 2014, for any other interim period or for any future period.
	These condensed consolidated financial statements include the accounts of Jazz Pharmaceuticals plc and our subsidiaries and intercompany transactions and balances have been eliminated. We record noncontrolling interests in our condensed consolidated financial statements which represent the ownership interest of minority shareholders in the equity of Gentium. Our condensed consolidated financial statements include the results of operations of businesses we have acquired from the date of each acquisition for the applicable reporting periods.
	Reclassifications
	Certain prior period amounts presented in these condensed consolidated financial statements and the accompanying footnotes have been reclassified to conform to current period presentation. Upfront license fees of $4.0 million, previously classified as research and development expense, have been reclassified to acquired in-process research and development, or IPR&D, in the condensed consolidated statements of operations and reclassified from operating activities to investing activities in the condensed consolidated statements of cash flows to conform to current period presentation. Inventories of $1.4 million previously classified as raw materials as of December 31, 2013 have been reclassified to work-in-process to conform to current period presentation.
Significant Risks and Uncertainties	'
	Significant Risks and Uncertainties
	Our financial results are significantly influenced by sales of Xyrem® (sodium oxybate) oral solution. In the three and six months ended June 30, 2014, net product sales of Xyrem were $191.4 million and $351.7 million, respectively, which represented 66.2% and 65.9% of total net product sales, respectively. Maintaining or increasing sales of Xyrem in its approved indications is subject to a number of risks and uncertainties, including the potential introduction of generic competition, changed or increased regulatory restrictions, and continued acceptance of Xyrem as safe and effective by physicians and patients. Four abbreviated new drug applications, or ANDAs, have been filed with the U.S. Food and Drug Administration, or FDA, by third parties seeking to market generic versions of Xyrem. We initiated lawsuits against all four third parties, and the litigation proceedings are ongoing. We cannot predict the timing or outcome of these proceedings. Although no trial date has been scheduled in the lawsuit against the first ANDA filer, Roxane Laboratories, Inc., or Roxane, we anticipate that trial on some of the patents in that case could occur as early as the first quarter of 2015. In addition, between late June and early August 2014, petitions for covered business method, or CBM, post-grant patent review by the Patent Trial and Appeal Board, or PTAB, of the U.S. Patent and Trademark Office, or USPTO, were filed by certain of the ANDA filers with respect to the validity of our patents covering the distribution system for Xyrem. To date, these petitions have not been accepted by the PTAB. We cannot predict the outcome of the PTAB’s decision on whether to institute any of the petitioned CBM review proceedings, whether additional post-grant patent review challenges will be filed, the outcome of any CBM review or other proceeding if the PTAB decides to institute one or more CBM review or other proceedings, or the impact any CBM review or other proceeding might have on ongoing ANDA litigation proceedings. We expect that the approval of an ANDA that results in the launch of a generic version of Xyrem, or the approval and launch of other sodium oxybate products that compete with Xyrem, would have a material adverse effect on our business, financial condition, results of operations and growth prospects.
	In addition, we are continuing our efforts on various regulatory matters, including updating documents that we have submitted to the FDA on our risk management and controlled distribution system for Xyrem, which we refer to as the Xyrem Risk Management Program. We have not reached agreement with the FDA on certain significant terms of our risk evaluation and mitigation strategies, or REMS, documents for Xyrem. For example, we disagree with the FDA’s current position that, as part of the current REMS process, the Xyrem deemed REMS should be modified to enable the distribution of Xyrem through more than one pharmacy, or potentially through retail pharmacies and wholesalers, as well as with certain modifications proposed by the FDA that would, in the FDA’s view, be sufficient to ensure that the REMS includes only those elements necessary to ensure that the benefits of Xyrem outweigh its risks, and that would, in the FDA’s view, reduce the burden on the healthcare system.
	The FDA notified us that it would exercise its claimed authority to modify our REMS and that it would finalize the REMS as modified by the FDA unless we initiated dispute resolution procedures with respect to the modification of the Xyrem deemed REMS.  Given these circumstances, we initiated dispute resolution procedures with the FDA at the end of February 2014. We received the FDA’s denial of our initial dispute resolution submission in the second quarter of 2014 and have submitted a request for further supervisory review to the next administrative level of the FDA. We expect to receive the FDA’s response to this further appeal in the third quarter of 2014. We cannot predict whether, or on what terms, we will reach agreement with the FDA on final REMS documents for Xyrem, the outcome or timing of the current dispute resolution procedure, whether we will initiate additional dispute resolution proceedings with the FDA or other legal proceedings prior to finalizing the REMS documents, or the outcome or timing of any such proceedings. We expect that final REMS documents for Xyrem will include modifications to, and/or requirements that are not currently implemented in, the Xyrem Risk Management Program. Any such modifications or additional requirements could potentially make it more difficult or expensive for us to distribute Xyrem, make it easier for future generic competitors, and/or negatively affect sales of Xyrem.
	We also expect to face pressure to license or share our Xyrem Risk Management Program, which is the subject of multiple issued patents, or elements of it, with generic competitors. In January 2014, the FDA held an initial meeting with us and the then-current Xyrem ANDA applicants to facilitate the development of a single shared system REMS for Xyrem (sodium oxybate), and we expect these interactions to continue among the parties and the new ANDA applicant. We cannot predict the outcome or impact on our business of any future action that we may take with respect to the development of a single shared system REMS for Xyrem (sodium oxybate), licensing or sharing our REMS, or the FDA’s response to a certification that a third party had been unable to obtain a license.
	Sales of our second largest product, Erwinaze® (asparaginase Erwinia chrysanthemi), called Erwinase® in markets outside of the United States, continue to grow. In the three and six months ended June 30, 2014, net product sales of Erwinaze/Erwinase were $47.9 million and $94.8 million, respectively, which represented 16.6% and 17.7% of total net product sales, respectively. We seek to maintain and increase sales of Erwinaze, as well as to make Erwinaze more widely available, through ongoing research and development activities. However, our ability to successfully and sustainably maintain and grow sales of Erwinaze is subject to a number of risks and uncertainties, including the limited population of patients with acute lymphoblastic leukemia, or ALL, and the incidence of hypersensitivity reactions to E. coli-derived asparaginase within that population, our ability to obtain data on the use of Erwinaze in young adults age 18 to 39 with ALL who are hypersensitive to E. coli-derived asparaginase, as well as our need to apply for and receive marketing authorizations, through the European Union’s, or EU’s, mutual recognition procedure or otherwise, in certain additional countries so we can launch promotional efforts in those countries. Another significant challenge to our ability to maintain the current sales level and continue to increase sales is our need to assure sufficient supply of Erwinaze on a timely basis. We have limited inventory of Erwinaze, and, during 2013, our supply of Erwinaze was nearly completely absorbed by demand for the product. In the past, we have experienced a disruption of supply of Erwinase in the European market due to manufacturing challenges, including shortages related to the failure of a batch to meet certain specifications in 2013, and we may experience similar or other manufacturing challenges in the future. If our continued efforts to avoid supply shortages are not successful, we could experience Erwinaze supply interruptions in the future, which could have a material adverse effect on our sales of and revenues from Erwinaze and limit our potential future maintenance and growth of the market for this product. In addition, while we continue to work with the manufacturer of Erwinaze to evaluate potential steps to increase the supply of Erwinaze over the longer term to address expected growing worldwide demand, our ability to increase sales of Erwinaze may be limited by our ability to obtain an increased supply of the product.
	We have made a significant investment in Defitelio® (defibrotide). We added the product to our portfolio as a result of the Gentium Acquisition and recently secured worldwide rights to the product by acquiring rights to defibrotide in the Americas. Our ability to realize the anticipated benefits from this product is subject to a number of risks and uncertainties, including our ability to successfully commercialize Defitelio in Europe and to obtain marketing approval in other countries, including the United States. We commenced the launch of Defitelio in certain countries in Europe in March 2014 and expect to launch in additional European countries on a rolling basis during the remainder of 2014 and in 2015. A key challenge to our success in commercializing Defitelio in Europe is our ability to obtain appropriate pricing and reimbursement approvals in those European countries where we have not yet launched Defitelio, including in countries where pricing and reimbursement approvals are required for launch. If we experience delays and unforeseen difficulties in obtaining favorable pricing and reimbursement approvals, planned launches in the affected countries would be delayed and our anticipated revenue from Defitelio in 2014 and our growth prospects in Europe could be negatively affected. Our anticipated revenue and growth prospects would also be negatively affected in the event that we are unable to ultimately obtain favorable pricing and reimbursement approvals in countries that represent significant markets. We are also engaged in activities related to the potential approval of defibrotide in the United States and are assessing the potential for approval in other countries and for development of defibrotide in indications in addition to the treatment of severe hepatic veno-occlusive disease, or VOD. While we believe that it may be possible to submit a new drug application, or NDA, for defibrotide for the treatment of severe VOD in patients undergoing hematopoietic stem cell transplantation, or HSCT, therapy without the need for data from an additional clinical trial, we may be unable to acquire and remediate key information required for the NDA data package in a timely manner and/or we may be required to conduct additional time-consuming and costly clinical trials in order to submit an NDA to the FDA or to otherwise obtain any regulatory approval of defibrotide in the United States. If we fail to obtain approval for defibrotide in the United States in a timely manner, in other countries or for new indications, our anticipated revenue from defibrotide and our growth prospects would be negatively affected.
	In addition to risks related specifically to Xyrem, Erwinaze and Defitelio/defibrotide, we are subject to other challenges and risks specific to our business, as well as risks and uncertainties common to companies in the pharmaceutical industry with development and commercial operations, including: the challenges of protecting and enhancing our intellectual property rights; delays or problems in the supply or manufacture of our products, particularly because we maintain limited inventories of certain products, including products for which our supply demands are growing, and we are dependent on single source suppliers to continue to meet our ongoing commercial demand or our requirements for clinical trial supplies; the need to obtain appropriate pricing and reimbursement for our products in an increasingly challenging environment due to, among other things, the attention being paid to healthcare cost containment and other austerity measures in the United States and worldwide, and in particular the need to maintain reimbursement for Xyrem in the United States; and the ongoing regulation and oversight by the FDA, the U.S. Drug Enforcement Administration, or DEA, and non-U.S. regulatory agencies, including with respect to product labeling, requirements for distribution, obtaining sufficient DEA quotas where needed, marketing and promotional activities, adverse event reporting and product recalls or withdrawals.  For example, in April 2014, we received a Form FDA 483 at the conclusion of a pharmacovigilance inspection conducted by the FDA. The Form FDA 483 included observations relating to certain aspects of our adverse drug experience reporting system for all of our products, including Xyrem. In light of the fact that we have previously received observations relating to adverse drug experience reporting, we do not know whether the FDA will take further action, including the issuance of a warning letter as a follow-up to its inspection, or require us to take further action, with respect to the matters covered in the Form FDA 483.
	Other risks and uncertainties related to our ability to execute on our strategy include: the challenges of achieving and maintaining commercial success of our products, such as obtaining sustained acceptance of our products by patients, physicians and payors; the risks associated with business combination or product or product candidate acquisition transactions, such as the challenges inherent in the integration of acquired businesses, including the acquired Gentium business, with our historic business, the increase in geographic dispersion among our centers of operation and taking on the operation of a manufacturing plant as a result of the Gentium Acquisition, and the risks that we may otherwise fail to realize the anticipated benefits (commercial or otherwise) from such acquisition transactions; the difficulty and uncertainty of pharmaceutical product development, including the timing thereof, and the uncertainty of clinical success, such as the risk that results from preclinical studies and/or early clinical trials may not be predictive of results obtained in later and larger clinical trials planned or anticipated to be conducted for our product candidates; the inherent uncertainty associated with the regulatory approval process, especially as we continue to undertake increased activities and make growing investment in our product pipeline development projects; our ability to identify and acquire, in-license or develop additional products or product candidates to grow our business; and possible restrictions on our ability and flexibility to pursue certain future opportunities as a result of our substantial outstanding debt obligations, which have increased significantly as a result of, among other things, the Gentium Acquisition.
Business Acquisitions	'
	Business Acquisitions
	Our consolidated financial statements include the results of operations of an acquired business from the date of acquisition. We account for acquired businesses using the acquisition method of accounting. The acquisition method of accounting for acquired businesses requires, among other things, that assets acquired, liabilities assumed and any noncontrolling interests in the acquired business be recognized at their estimated fair values as of the acquisition date, with limited exceptions, and that the fair value of acquired IPR&D be recorded on the balance sheet. Also, transaction costs are expensed as incurred. Any excess of the acquisition consideration over the assigned values of the net assets acquired is recorded as goodwill. Contingent consideration is included within the acquisition cost and is recognized at its fair value on the acquisition date. A liability resulting from contingent consideration is remeasured to fair value at each reporting date until the contingency is resolved and changes in fair value are recognized in earnings.
Acquired In-Process Research and Development	'
	Acquired In-Process Research and Development
	The initial costs of rights to IPR&D projects acquired in an asset acquisition are expensed as IPR&D unless the project has an alternative future use. The fair value of IPR&D projects acquired in a business combination are capitalized and accounted for as indefinite-lived intangible assets until the underlying project receives regulatory approval, at which point the intangible asset will be accounted for as a finite-lived intangible asset, or discontinued, at which point the intangible asset will be written off. Development costs incurred after an acquisition are expensed as incurred.
Intangible Assets	'
	Intangible Assets
	Intangible assets with finite useful lives consist primarily of purchased developed technology and are amortized on a straight-line basis over their estimated useful lives, which range from two to 16 years. The estimated useful lives associated with finite-lived intangible assets are consistent with the estimated lives of the associated products and may be modified when circumstances warrant. Such assets are reviewed for impairment when events or circumstances indicate that the carrying value of an asset may not be recoverable. An impairment loss would be recognized when estimated undiscounted future cash flows expected to result from the use of an asset and its eventual disposition are less than its carrying amount. The amount of any impairment is measured as the difference between the carrying amount and the fair value of the impaired asset.
Concentrations of Risk	'
	Concentrations of Risk
	Financial instruments that potentially subject us to concentrations of credit risk consist of cash, cash equivalents and marketable securities. Our investment policy permits investments in U.S. federal government and federal agency securities, corporate bonds or commercial paper issued by U.S. corporations, money market instruments, certain qualifying money market mutual funds, certain repurchase agreements, and tax-exempt obligations of U.S. states, agencies and municipalities and places restrictions on credit ratings, maturities, and concentration by type and issuer. We are exposed to credit risk in the event of a default by the financial institutions holding our cash, cash equivalents and marketable securities and issuers of investments to the extent recorded on the balance sheet.
	We are also subject to credit risk from our accounts receivable related to our product sales. We monitor our exposure within accounts receivable and record a reserve against uncollectible accounts receivable as necessary. We extend credit to pharmaceutical wholesale distributors and specialty pharmaceutical distribution companies, primarily in the United States, and to other international distributors and hospitals. Customer creditworthiness is monitored and collateral is not required. We monitor deteriorating economic conditions in certain European countries which may result in variability of the timing of cash receipts and an increase in the average length of time that it takes to collect accounts receivable outstanding. Historically, we have not experienced significant credit losses on our accounts receivable and we do not expect to have write-offs or adjustments to accounts receivable which would have a material adverse effect on our financial position, liquidity or results of operations. As of June 30, 2014, five customers accounted for 81% of gross accounts receivable, including Express Scripts Specialty Distribution Services, Inc. and its affiliate CuraScript, Inc., or Express Scripts, which accounted for 65% of gross accounts receivable, Idis Limited, which accounted for 8% of gross accounts receivable, and Accredo Health Group, Inc., or Accredo, which accounted for 5% of gross accounts receivable.  As of December 31, 2013, five customers accounted for 85% of gross accounts receivable, including Express Scripts, which accounted for 69% of gross accounts receivable, and Accredo, which accounted for 9% of gross accounts receivable.
	We depend on single source suppliers and manufacturers for each of our products, product candidates and their active pharmaceutical ingredients.
Use of Estimates	'
	Use of Estimates
	The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses, and related disclosures in the condensed consolidated financial statements and accompanying notes. Management bases its estimates on historical experience and on assumptions believed to be reasonable under the circumstances. Actual results could differ materially from those estimates.
Net Income per Ordinary Share Attributable to Jazz Pharmaceuticals plc	'
	Net Income (Loss) per Ordinary Share Attributable to Jazz Pharmaceuticals plc
	Basic net income (loss) per ordinary share attributable to Jazz Pharmaceuticals plc is based on the weighted-average number of ordinary shares outstanding. Diluted net income (loss) per ordinary share attributable to Jazz Pharmaceuticals plc is based on the weighted-average number of ordinary shares outstanding and potentially dilutive ordinary shares outstanding.
	Basic and diluted net income (loss) per ordinary share attributable to Jazz Pharmaceuticals plc were computed as follows (in thousands, except per share amounts):
		Three Months Ended				Six Months Ended
		June 30,				June 30,
		2014		2013		2014			2013
	Numerator:
	Net income (loss) attributable to Jazz Pharmaceuticals plc	$	43,659	$	42,185	$	(48,991	)	$	85,610
	Denominator:
	Weighted-average ordinary shares used in calculating net income (loss) per ordinary share attributable to Jazz Pharmaceuticals plc - basic	59,519		58,737		59,025			58,548
	Dilutive effect of employee equity incentive and purchase plans	2,293		1,414		—			1,456
	Dilutive effect of warrants	566		1,417		—			1,537
	Weighted-average ordinary shares used in calculating net income (loss) per ordinary share attributable to Jazz Pharmaceuticals plc - diluted	62,378		61,568		59,025			61,541
	Net income (loss) per ordinary share attributable to Jazz Pharmaceuticals plc:
	Basic	$	0.73	$	0.72	$	(0.83	)	$	1.46
	Diluted	$	0.7	$	0.69	$	(0.83	)	$	1.39
	Potentially dilutive ordinary shares from employee equity incentive and purchase plans and warrants were not included in the diluted net loss per ordinary share attributable to Jazz Pharmaceuticals plc for the six months ended June 30, 2014 because the inclusion of such shares would have an anti-dilutive effect.
	Potentially dilutive ordinary shares from employee equity incentive and purchase plans and warrants are determined by applying the treasury stock method to the assumed exercise of warrants and share options, the assumed vesting of outstanding restricted stock units, or RSUs, and the assumed issuance of ordinary shares under our employee stock purchase plan, or ESPP.

The_Company_and_Summary_of_Sig2

The Company and Summary of Significant Accounting Policies (Tables)	6 Months Ended
	Jun. 30, 2014
Accounting Policies [Abstract]	'
Basic and Diluted Net Income per Ordinary Share Computation	'
	Basic and diluted net income (loss) per ordinary share attributable to Jazz Pharmaceuticals plc were computed as follows (in thousands, except per share amounts):
		Three Months Ended						Six Months Ended
		June 30,						June 30,
		2014			2013			2014			2013
	Numerator:
	Net income (loss) attributable to Jazz Pharmaceuticals plc	$	43,659		$	42,185		$	(48,991	)	$	85,610
	Denominator:
	Weighted-average ordinary shares used in calculating net income (loss) per ordinary share attributable to Jazz Pharmaceuticals plc - basic	59,519			58,737			59,025			58,548
	Dilutive effect of employee equity incentive and purchase plans	2,293			1,414			—			1,456
	Dilutive effect of warrants	566			1,417			—			1,537
	Weighted-average ordinary shares used in calculating net income (loss) per ordinary share attributable to Jazz Pharmaceuticals plc - diluted	62,378			61,568			59,025			61,541
	Net income (loss) per ordinary share attributable to Jazz Pharmaceuticals plc:
	Basic	$	0.73		$	0.72		$	(0.83	)	$	1.46
	Diluted	$	0.7		$	0.69		$	(0.83	)	$	1.39
Weighted-Average Ordinary Shares Excluded from Computation of Diluted Net Income per Share	'
	The following table represents the weighted-average ordinary shares that were excluded from the computation of diluted net income (loss) per ordinary share attributable to Jazz Pharmaceuticals plc for the periods presented because including them would have an anti-dilutive effect (in thousands):
		Three Months Ended					Six Months Ended
		June 30,					June 30,
		2014		2013			2014		2013
	Options to purchase ordinary shares and RSUs	1,088		2,839			5,526		2,596
	Warrants to purchase ordinary shares	—		—			928		—
	Ordinary shares under ESPP	—		—			137		—

Business_Combination_and_Asset1

Business Combination and Asset Acquisitions (Tables)	6 Months Ended
	Jun. 30, 2014
Business Combinations [Abstract]	'
Summary of acquisition consideration given	'
	The acquisition consideration (not including the acquisition cost of $119.2 million to acquire the 12% noncontrolling interests in the subsequent offering period of the tender offer and the acquisition cost of $17.5 million to acquire the 1.7% noncontrolling interests in June 2014) was comprised of (in thousands):
	Cash consideration for shares acquired in initial tender offer period	$	697,917
	Liability for shares committed under guaranteed delivery procedures	76,666
	Liability for options committed for exercise	82,503
	Total acquisition consideration	$	857,086
Summary of assets and liabilities assumed in acquisition	'
	The fair values of assets acquired and liabilities assumed at the closing date of the Gentium Acquisition, as well as the fair value at the acquisition date of the noncontrolling interests in Gentium, are summarized below (in thousands):
	Cash and cash equivalents	$	28,410
	Short-term deposit	5,418
	Accounts receivable (1)	13,855
	Inventories	13,525
	Prepaid and other current assets	1,383
	Intangible assets	960,350
	Goodwill	308,642
	Deferred tax assets	22,999
	Property, plant and equipment	10,201
	Other long-term assets	431
	Accounts payable	(11,778		)
	Accrued expenses	(51,477		)
	Income taxes payable	(502		)
	Other long-term liabilities	(654		)
	Debt (current and long-term)	(2,351		)
	Deferred tax liabilities	(304,788		)
	Noncontrolling interests	(136,578		)
	Total acquisition consideration	$	857,086
	___________________
	-1	The estimated fair value of trade receivables acquired was $13.9 million and the gross contractual amount was $14.9 million, of which we expect that $1.0 million will be uncollectible.
Summary of intangible assets acquired	'
	The intangible assets as of the closing date of the Gentium Acquisition included (in thousands):
	Finite-lived intangible assets:
	Currently marketed product:
	Defibrotide VOD (Non Americas)	$	719,500
	Manufacturing contracts	14,500
	Tradename	350
	Total finite-lived intangible assets	734,350
	IPR&D:
	Defibrotide VOD Prophylaxis	168,000
	Defibrotide VOD (Americas)	58,000
	Total IPR&D	226,000
	Total intangible assets	$	960,350
Summary of pro forma information	'
	The unaudited pro forma results do not assume any operating efficiencies as a result of the consolidation of operations and are as follows (in thousands, except per share data):
		Three Months Ended					Six Months Ended
		June 30,					June 30,
		2014			2013		2014			2013
	Revenues	$	291,230		$	220,772	$	541,452		$	427,013
	Net income (loss) attributable to Jazz Pharmaceuticals plc	$	49,473		$	22,953	$	(28,204	)	$	37,088
	Net income (loss) per ordinary share attributable to Jazz Pharmaceuticals plc - basic	$	0.83		$	0.39	$	(0.48	)	$	0.63
	Net income (loss) per ordinary share attributable to Jazz Pharmaceuticals plc - diluted	$	0.79		$	0.37	$	(0.48	)	$	0.6

Inventories_Tables

Inventories (Tables)	6 Months Ended
	Jun. 30, 2014
Inventory Disclosure [Abstract]	'
Components of Inventories	'
	Inventories consisted of the following (in thousands):
		June 30,		December 31,
		2014		2013
	Raw materials	$	3,155	$	3,506
	Work in process	12,246		10,301
	Finished goods	17,697		14,862
	Total inventories	$	33,098	$	28,669

Fair_Value_Measurement_Tables

Fair Value Measurement (Tables)	6 Months Ended
	Jun. 30, 2014
Fair Value Disclosures [Abstract]	'
Cash Cash Equivalents and Marketable Securities	'
	Cash and cash equivalents consisted of the following (in thousands):
		30-Jun-14
		Amortized		Gross		Gross		Estimated		Cash
		Cost		Unrealized		Unrealized		Fair Value
				Gains		Losses
	Cash	$	268,255	$	—	$	—	$	268,255	$	268,255
		31-Dec-13
		Amortized		Gross		Gross		Estimated		Cash and
		Cost		Unrealized		Unrealized		Fair Value		Cash
				Gains		Losses				Equivalents
	Cash	$	495,990	$	—	$	—	$	495,990	$	495,990
	Time deposits	140,514		—		—		140,514		140,514
	Totals	$	636,504	$	—	$	—	$	636,504	$	636,504
Available-for-Sale Securities and Other Assets and Liabilities Measured at Fair Value on Recurring Basis	'
	The following table summarizes, by major security type, our available-for-sale securities and liabilities as of December 31, 2013 that were measured at fair value on a recurring basis and were categorized using the fair value hierarchy (in thousands):
		30-Jun-14				31-Dec-13
		Significant Other		Total		Significant		Total
		Observable		Estimated		Other		Estimated
		Inputs		Fair Value		Observable		Fair Value
		(Level 2)				Inputs
						(Level 2)
	Assets:
	Available-for-sale securities
	Time deposits	$	—	$	—	$	140,514	$	140,514
	Liabilities:
	Contingent consideration	$	—	$	—	$	50,000	$	50,000

Certain_Balance_Sheet_Items_Ta

Certain Balance Sheet Items (Tables)	6 Months Ended
	Jun. 30, 2014
Certain Balance Sheet Items [Abstract]	'
Property and Equipment	'
	Property and equipment consisted of the following (in thousands):
		June 30,			December 31,
		2014			2013
	Construction-in-progress	$	18,041		$	4,388
	Computer software	8,476			7,960
	Machinery and equipment	7,495			417
	Leasehold improvements	6,753			4,587
	Computer equipment	6,550			5,610
	Furniture and fixtures	2,279			1,897
	Land and buildings	1,686			—
	Subtotal	51,280			24,859
	Less accumulated depreciation and amortization	(12,818		)	(10,613		)
	Property and equipment, net	$	38,462		$	14,246
Accrued Liabilities	'
	Accrued liabilities consisted of the following (in thousands):
		June 30,			December 31,
		2014			2013
	Rebates and other sales deductions	$	45,871		$	38,772
	Employee compensation and benefits	39,782			31,829
	Sales returns reserve	17,214			21,110
	Royalties	7,328			6,082
	Accrued interest	6,174			4,150
	Accrued construction-in-progress	3,298			450
	Professional fees	3,209			5,225
	Other	19,967			12,100
	Total accrued liabilities	$	142,843		$	119,718

Goodwill_and_Intangible_Assets1

Goodwill and Intangible Assets (Tables)	6 Months Ended
	Jun. 30, 2014
Goodwill and Intangible Assets Disclosure [Abstract]	'
Gross Carrying Amount of Goodwill	'
	The gross carrying amount of goodwill was as follows (in thousands):
	Balance at December 31, 2013	$	450,456
	Goodwill arising from the Gentium Acquisition	308,642
	Foreign exchange	1,216
	Balance at June 30, 2014	$	760,314
Gross Carrying Amounts and Net Book Values of Intangible Assets	'
	The gross carrying amounts and net book values of our intangible assets were as follows (in thousands):
		June 30, 2014									December 31, 2013
		Remaining		Gross		Accumulated			Net Book		Gross		Accumulated			Net Book
		Weighted-		Carrying		Amortization			Value		Carrying		Amortization			Value
		Average Useful		Amount							Amount
		Life
		(In years)
	Acquired developed technologies	13.3		$	1,632,060	$	(227,380	)	$	1,404,680	$	957,089	$	(179,225	)	$	777,864
	Manufacturing contracts	3.6		14,612		(1,610		)	13,002		—		—			—
	Trademarks	0.5		2,953		(2,619		)	334		2,600		(2,327		)	273
	Total finite-lived intangible assets			1,649,625		(231,609		)	1,418,016		959,689		(181,552		)	778,137
	Acquired IPR&D assets			261,988		—			261,988		34,259		—			34,259
	Total intangible assets			$	1,911,613	$	(231,609	)	$	1,680,004	$	993,948	$	(181,552	)	$	812,396
Estimated Future Amortization Costs	'
	Based on finite-lived intangible assets recorded as of June 30, 2014, and assuming the underlying assets will not be further impaired and that we will not change the expected lives of the assets, future amortization expenses were estimated as follows (in thousands):
	Year Ending December 31,	Estimated
		Amortization
		Expense
	2014 (remainder)	$	62,124
	2015	119,472
	2016	115,121
	2017	115,030
	2018	111,525
	Thereafter	894,744
	Total	$	1,418,016

LongTerm_Debt_Tables

Long-Term Debt (Tables)	6 Months Ended
	Jun. 30, 2014
Debt Disclosure [Abstract]	'
Schedule of Long-term Debt	'
	The following table summarizes the carrying amount of our borrowings (in thousands):
		June 30, 2014		December 31, 2013
	Term loan facility	$	894,328	$	549,976
	Revolving credit facility	300,000		—
	Other borrowings	2,105		—
	Total debt	1,196,433		549,976
	Less current portion	9,473		5,572
	Total long-term debt	$	1,186,960	$	544,404
Schedule of Maturities of New Term Loans	'
	Scheduled maturities with respect to our long-term debt are as follows (in thousands):
	Year Ending December 31,	Scheduled Long-Term Debt Maturities
	2014 (remainder)	$	4,736
	2015	9,475
	2016	9,481
	2017	309,487
	2018	868,510
	Thereafter	296
	Total	$	1,201,985

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	6 Months Ended
	Jun. 30, 2014
Commitments and Contingencies Disclosure [Abstract]	'
Future Minimum Lease Payments under Noncancelable Operating Leases	'
	Future minimum lease payments under our noncancelable operating leases at June 30, 2014 were as follows (in thousands):
	Year Ending December 31,	Lease
		Payments
	2014 (remainder)	$	5,414
	2015	10,021
	2016	7,292
	2017	3,956
	2018	910
	Thereafter	174
	Total	$	27,767

Shareholders_Equity_Tables

Shareholders' Equity (Tables)	6 Months Ended
	Jun. 30, 2014
Stockholders' Equity Note [Abstract]	'
Summary of stockholders equity	'
	The following tables present a reconciliation of our beginning and ending balances in shareholders’ equity for the six months ended June 30, 2014 and 2013, respectively (in thousands):
		Attributable to:
		Jazz Pharmaceuticals plc			Noncontrolling interests			Total Shareholders' Equity
	Shareholders' equity at January 1, 2014	$	1,295,534		$	—		$	1,295,534
	Noncontrolling interests from the Gentium Acquisition				136,578			136,578
	Acquisition of noncontrolling interests	(1,517		)	(135,123		)	(136,640		)
	Issuance of ordinary shares in conjunction with employee equity incentive and purchase plans and warrant exercises	31,642			—			31,642
	Employee withholding taxes related to share-based awards	(10,551		)	—			(10,551		)
	Share-based compensation	32,476			—			32,476
	Tax benefit from employee share options	792			—			792
	Shares repurchased	(23,487		)	—			(23,487		)
	Other comprehensive income	3,793			3			3,796
	Net loss	(48,991		)	(1,062		)	(50,053		)
	Shareholders' equity at June 30, 2014	$	1,279,691		$	396		$	1,280,087
		Jazz Pharmaceuticals plc
	Shareholders' equity at January 1, 2013	$	1,121,292
	Issuance of ordinary shares in conjunction with employee equity incentive and purchase plans and warrant exercises	15,463
	Employee withholding taxes related to share-based awards	(1,597		)
	Share-based compensation	20,089
	Tax benefit from employee share options	—
	Shares repurchased	(53,578		)
	Other comprehensive income	(11,826		)
	Net income	85,610
	Shareholders' equity at June 30, 2013	$	1,175,453
Component of Accumulated Other Comprehensive Loss	'
	The components of accumulated other comprehensive income as of June 30, 2014 and December 31, 2013 were as follows (in thousands):
		Foreign			Total
		Currency			Accumulated
		Translation			Other
		Adjustments			Comprehensive
					Income
	Balance at December 31, 2013	$	56,153		$	56,153
	Other comprehensive income	3,793			3,793
	Balance at June 30, 2014	$	59,946		$	59,946

ShareBased_Compensation_Tables

Share-Based Compensation (Tables)	6 Months Ended
	Jun. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Share-Based Compensation Expense	'
	Share-based compensation expense related to share options, RSUs and grants under our ESPP was as follows (in thousands):
		Three Months Ended						Six Months Ended
		June 30,						June 30,
		2014			2013			2014			2013
	Selling, general and administrative	$	14,042		$	9,539		$	25,217		$	16,544
	Research and development	3,226			1,479			5,685			2,522
	Cost of product sales	1,284			488			1,465			1,197
	Total share-based compensation expense, pre-tax	18,552			11,506			32,367			20,263
	Tax benefit from share-based compensation expense	(5,416		)	(3,535		)	(9,702		)	(6,348		)
	Total share-based compensation expense, net of tax	$	13,136		$	7,971		$	22,665		$	13,915
Weighted-Average Assumptions Used in Black-Scholes Option Pricing Model which was Used to Estimate Grant Date Fair Value per Share	'
	The table below shows the number of shares underlying options granted to purchase our ordinary shares, the weighted-average assumptions used in the Black-Scholes option pricing model and the resulting weighted-average grant date fair value of share options granted:
		Three Months Ended						Six Months Ended
		June 30,						June 30,
		2014			2013			2014			2013
	Shares underlying options granted (in thousands)	101			161			807			1,172
	Grant date fair value	$	53.26		$	27.53		$	61.85		$	27.72
	Black-Scholes option pricing model assumption information:
	Volatility	45		%	58		%	46		%	59		%
	Expected term (years)	4.3			4.4			4.3			4.4
	Range of risk-free rates	1.3-1.4%			0.5-0.8%			1.1-1.4%			0.5-0.8%
	Expected dividend yield	—		%	—		%	—		%	—		%
Schedule of Restricted Stock Unit activity	'
	The table below shows the number of RSUs granted covering an equal number of our ordinary shares and the weighted-average grant date fair value of RSUs granted:
		Three Months Ended						Six Months Ended
		June 30,						June 30,
		2014			2013			2014			2013
	RSUs granted (in thousands)	51			75			392			522
	Grant date fair value	$	141.36		$	59.43		$	162.48		$	59

Segment_and_Other_Information_

Segment and Other Information (Tables)	6 Months Ended
	Jun. 30, 2014
Segment Reporting [Abstract]	'
Summary of Total Revenues	'
	The following table presents a summary of total revenues (in thousands):
		Three Months Ended							Six Months Ended
		June 30,							June 30,
		2014			2013				2014			2013
	Xyrem® (sodium oxybate) oral solution	$	191,366		$	133,742			$	351,744		$	251,268
	Erwinaze® (asparaginase Erwinia chrysanthemi)/Erwinase®	47,869			44,860				94,789			86,676
	Defitelio® (defibrotide)/defibrotide	20,244			—				32,453			—
	Prialt® (ziconotide) intrathecal infusion	5,831			4,694				10,140			9,680
	Psychiatry	11,732			11,764				21,598			29,414
	Other	12,058			11,504				23,362			24,178
	Product sales, net	289,100			206,564				534,086			401,216
	Royalties and contract revenues	2,130			1,688				4,063			3,273
	Total revenues	$	291,230		$	208,252			$	538,149		$	404,489
Summary of Total Revenues Attributed to Geographic Sources	'
	The following table presents a summary of total revenues attributed to geographic sources (in thousands):
		Three Months Ended							Six Months Ended
		June 30,							June 30,
		2014			2013				2014			2013
	United States	$	247,525		$	191,274			$	462,481		$	368,185
	Europe	30,687			13,074				55,030			27,436
	All other	13,018			3,904				20,638			8,868
	Total revenues	$	291,230		$	208,252			$	538,149		$	404,489
Summary of Revenues from Customers Representing More Than 10% of Total Revenues	'
	The following table presents a summary of the percentage of total revenues from customers that represented more than 10% of our total revenues:
		Three Months Ended					Six Months Ended
		June 30,					June 30,
		2014		2013			2014			2013
	Express Scripts	65	%	64	%		65	%		62	%
	Accredo	13	%	18	%		14	%		17	%
Total Long-Lived Assets by Location	'
	The following table presents total long-lived assets, consisting of property and equipment, by location (in thousands):
		June 30,			December 31,
		2014			2013
	Ireland	$	19,481		$	5,799
	Italy	10,043			—
	United States	8,021			7,734
	Other	917			713
	Total long-lived assets	$	38,462		$	14,246

The_Company_and_Summary_of_Sig3

The Company and Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)

3 Months Ended

6 Months Ended

1 Months Ended

5 Months Ended

0 Months Ended

3 Months Ended

6 Months Ended

3 Months Ended

6 Months Ended

3 Months Ended

6 Months Ended

3 Months Ended

6 Months Ended

12 Months Ended

6 Months Ended

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Feb. 28, 2014

Jun. 30, 2014

Feb. 20, 2014

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2013

Dec. 31, 2013

Jun. 30, 2014

Jun. 30, 2014

Customer

Customer

Customer

Express Scripts [Member]

Express Scripts [Member]

Idis Limited [Member]

Accredo Health Group, Inc. [Member]

Accredo Health Group, Inc. [Member]

Gentium [Member]

Gentium [Member]

Gentium [Member]

Gentium [Member]

Xyrem [Member]

Xyrem [Member]

Xyrem [Member]

Xyrem [Member]

Erwinaze And Erwinase [Member]

Erwinaze And Erwinase [Member]

Erwinaze And Erwinase [Member]

Erwinaze And Erwinase [Member]

Sales Revenue, Product Line [Member]

Sales Revenue, Product Line [Member]

Sales Revenue, Product Line [Member]

Sales Revenue, Product Line [Member]

Reclassification from R&D to IPR&D [Member]

Reclassification of Inventories [Member]

Minimum [Member]

Maximum [Member]

Ordinary Options and American Depositary Shares [Member]

Product Concentration Risk [Member]

Product Concentration Risk [Member]

Product Concentration Risk [Member]

Product Concentration Risk [Member]

Xyrem [Member]

Xyrem [Member]

Erwinaze And Erwinase [Member]

Erwinaze And Erwinase [Member]

Summary Of Significant Accounting Policies [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Ownership interest acquired, percentage

'

'

'

'

'

'

'

'

'

'

'

'

'

98.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Additional interest acquired, percentage

'

'

'

'

'

'

'

'

'

'

1.70%

'

'

12.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Acquisition cost of noncontrolling interest

'

'

$136,640,000

$0

'

'

'

'

'

'

$17,500,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net acquisition consideration

'

'

'

'

'

'

'

'

'

'

'

'

993,700,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total acquisition consideration, including subsequent acquisition

'

'

'

'

'

'

'

'

'

'

'

'

1,010,800,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Proceeds from exercise of acquired share options

'

'

'

'

'

'

'

'

'

'

'

17,100,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Amount reclassified

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

4,000,000

1,400,000

'

'

Product sales, net

$289,100,000

$206,564,000

$534,086,000

$401,216,000

'

'

'

'

'

'

'

'

'

'

$191,366,000

$133,742,000

$351,744,000

$251,268,000

$47,869,000

$44,860,000

$94,789,000

$86,676,000

'

'

'

'

'

'

'

'

Percentage of product sales, net

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

66.20%

65.90%

16.60%

17.70%

'

'

'

'

Intangible assets, useful life

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'2 years

'16 years

Number of customers with significant accounts receivable

5

'

5

'

5

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Percentage of gross accounts receivable

81.00%

'

81.00%

'

85.00%

65.00%

69.00%

8.00%

5.00%

9.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Basic_and_Diluted_Net_Income_L

Basic and Diluted Net Income (Loss) per Common Share (Detail) (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Numerator:	'	'	'	'
Net income (loss) attributable to Jazz Pharmaceuticals plc	$43,659	$42,185	($48,991)	$85,610
Denominator:	'	'	'	'
Weighted-average ordinary shares used in calculating net income (loss) per ordinary share attributable to Jazz Pharmaceuticals plc - basic (in shares)	59,519	58,737	59,025	58,548
Dilutive effect of employee equity incentive and purchase plans (in shares)	2,293	1,414	0	1,456
Dilutive effect of warrants (in shares)	566	1,417	0	1,537
Weighted-average ordinary shares - diluted (in shares)	62,378	61,568	59,025	61,541
Basic net income (in dollars per share)	$0.73	$0.72	($0.83)	$1.46
Diluted net income (in dollars per share)	$0.70	$0.69	($0.83)	$1.39

WeightedAverage_Ordinary_Share

Weighted-Average Ordinary Shares Excluded from Computation of Diluted Net Income per Share (Detail)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Equity Options [Member]	'	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'	'
Ordinary shares	1,088	2,839	5,526	2,596
Warrants [Member]	'	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'	'
Ordinary shares	0	0	928	0
Ordinary shares under ESPP [Member]	'	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'	'
Ordinary shares	0	0	137	0

Business_Combination_and_Asset2

Business Combination and Asset Acquisitions Consideration Transferred (Details) (Gentium [Member], USD $)	0 Months Ended
In Thousands, unless otherwise specified	Jan. 23, 2014
Business Acquisition [Line Items]	'
Cash consideration for shares acquired in initial tender offer period	$697,917
Total acquisition consideration	857,086
American Depositary Shares [Member]	'
Business Acquisition [Line Items]	'
Liability for shares committed under guaranteed delivery procedures	76,666
Ordinary Options [Member]	'
Business Acquisition [Line Items]	'
Liability for shares committed under guaranteed delivery procedures	$82,503

Business_Combination_and_Asset3

Business Combination and Asset Acquisitions Assets and Liabilities Assumed (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013	Jan. 23, 2014
In Thousands, unless otherwise specified			Gentium [Member]
Business Acquisition [Line Items]	'	'	'
Cash and cash equivalents	'	'	$28,410
Short-term deposit	'	'	5,418
Accounts receivable	'	'	13,855	[1]
Inventories	'	'	13,525
Prepaid and other current assets	'	'	1,383
Intangible assets	'	'	960,350
Goodwill	760,314	450,456	308,642
Deferred tax assets	'	'	22,999
Property, plant and equipment	'	'	10,201
Other long-term assets	'	'	431
Accounts payable	'	'	-11,778
Accrued expenses	'	'	-51,477
Income taxes payable	'	'	-502
Other long-term liabilities	'	'	-654
Debt (current and long-term)	'	'	-2,351
Deferred tax liabilities	'	'	-304,788
Noncontrolling interests	'	'	-136,578
Total acquisition consideration	'	'	$857,086
[1]	The estimated fair value of trade receivables acquired was $13.9 million and the gross contractual amount was $14.9 million, of which we expect that $1.0 million will be uncollectible.

Business_Combination_and_Asset4

Business Combination and Asset Acquisitions Intangible Assets Acquired (Details) (Gentium [Member], USD $)	0 Months Ended
In Thousands, unless otherwise specified	Jan. 23, 2014
Acquired Intangible Assets [Line Items]	'
Finite and Indefinite-lived Intangible Assets Acquired	$960,350
Manufacturing Contracts [Member]	'
Acquired Intangible Assets [Line Items]	'
Total finite-lived intangible assets	14,500
Trade Names [Member]	'
Acquired Intangible Assets [Line Items]	'
Total finite-lived intangible assets	350
Acquired Intangible Assets Excluding In-process Research and Development [Member]	'
Acquired Intangible Assets [Line Items]	'
Total finite-lived intangible assets	734,350
In Process Research and Development [Member]	'
Acquired Intangible Assets [Line Items]	'
Total indefinite-lived intangible assets	226,000
Defibrotide VOD TX (Non-US) [Member] | Acquired developed technologies [Member]	'
Acquired Intangible Assets [Line Items]	'
Total finite-lived intangible assets	719,500
Defibrotide VOD Prophalaxis [Member] | In Process Research and Development [Member]	'
Acquired Intangible Assets [Line Items]	'
Total indefinite-lived intangible assets	168,000
Defibrotide VOD Tx (US) [Member] | In Process Research and Development [Member]	'
Acquired Intangible Assets [Line Items]	'
Total indefinite-lived intangible assets	$58,000

Business_Combination_and_Asset5

Business Combination and Asset Acquisitions Pro Forma Information (Details) (Gentium [Member], USD $)	3 Months Ended		6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Gentium [Member]	'	'	'	'
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]	'	'	'	'
Revenues	$291,230	$220,772	$541,452	$427,013
Net income (loss) attributable to Jazz Pharmaceuticals plc	$49,473	$22,953	($28,204)	$37,088
Net income (loss) per ordinary share - basic (in dollars per share)	$0.83	$0.39	($0.48)	$0.63
Net income (loss) per ordinary share - diluted (in dollars per share)	$0.79	$0.37	($0.48)	$0.60

Business_Combination_and_Asset6

Business Combination and Asset Acquisitions Narrative (Details) (USD $)

3 Months Ended

6 Months Ended

0 Months Ended

6 Months Ended

0 Months Ended

1 Months Ended

3 Months Ended

5 Months Ended

6 Months Ended

0 Months Ended

3 Months Ended

6 Months Ended

0 Months Ended

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Jan. 13, 2014

Jan. 13, 2014

Jun. 30, 2014

Jun. 30, 2014

Jan. 23, 2014

Jun. 30, 2014

Feb. 28, 2014

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2013

Dec. 19, 2013

Jan. 23, 2014

Jan. 23, 2014

Jun. 30, 2014

Jun. 30, 2014

Feb. 20, 2014

Jan. 23, 2014

Jan. 23, 2014

Jan. 23, 2014

Jan. 23, 2014

Aerial [Member]

Aerial [Member]

Aerial [Member]

Noncontrolling Interest [Member]

Gentium [Member]

Gentium [Member]

Gentium [Member]

Gentium [Member]

Gentium [Member]

Gentium [Member]

Gentium [Member]

Gentium [Member]

Gentium [Member]

Gentium [Member]

Gentium [Member]

Gentium [Member]

Gentium [Member]

Gentium [Member]

Gentium [Member]

Gentium [Member]

Tender Offer Agreement [Member]

Tender Offer Agreement [Member]

Upfront Fees [Member]

Upfront Fees [Member]

Product [Member]

Manufacturing Contracts [Member]

Selling, general and administrative [Member]

Selling, general and administrative [Member]

Ordinary Options and American Depositary Shares [Member]

Ordinary Options and American Depositary Shares [Member]

Noncontrolling Interest [Member]

American Depositary Shares [Member]

Ordinary Options [Member]

Business Acquisition [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Share price of cash tender offer (in dollars per share)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$57

'

'

'

'

'

'

'

'

'

Shares tendered

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

12,244,156

'

'

'

Issued and outstanding shares acquired, percentage

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

79.00%

'

'

'

Fully diluted shares acquired, percentage

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

69.00%

'

'

'

Total ownership interest acquired, percentage

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

98.00%

'

'

'

'

Acquisition cost of noncontrolling interest

'

'

$136,640,000

$0

'

'

'

'

'

$17,500,000

'

'

'

'

'

'

'

'

'

'

'

'

'

$136,600,000

'

'

Net acquisition consideration

'

'

'

'

'

'

'

'

'

'

'

'

'

993,700,000

'

'

'

'

'

'

'

'

'

'

'

'

Total acquisition consideration, including subsequent acquisition

'

'

'

'

'

'

'

'

'

'

'

'

'

1,010,800,000

'

'

'

'

'

'

'

'

'

'

'

'

Proceeds from exercise of acquired share options

'

'

'

'

'

'

'

'

'

'

17,100,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total acquisition consideration

'

'

'

'

'

'

'

'

857,086,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Shares committed to tender offering

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1,345,023

'

Options subject to support agreements

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1,666,608

Ownership percentage

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

86.00%

'

'

'

Acquisition cost of a noncontrolling interest

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

119,200,000

'

'

'

'

Additional ownership interest acquired, percentage

'

'

'

'

'

'

'

'

'

1.70%

'

'

'

'

'

'

'

'

'

'

'

12.00%

'

'

'

'

Transaction costs

'

'

'

'

'

'

'

'

'

'

'

'

'

'

10,000,000

'

'

'

'

'

'

'

'

'

'

'

Change in control obligation expenses

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

3,300,000

4,400,000

'

'

'

'

'

Revenue

291,230,000

208,252,000

538,149,000

404,489,000

'

'

'

'

'

'

'

22,500,000

'

'

35,900,000

'

'

'

'

'

'

'

'

'

'

'

Net income (loss)

43,586,000

42,185,000

-50,053,000

85,610,000

'

'

'

-1,062,000

'

'

'

-11,200,000

'

'

-29,100,000

'

'

'

'

'

'

'

'

'

'

'

Estimated fair value of trade receivables acquired

'

'

'

'

'

'

'

'

13,900,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Gross contractual amount of trade receivables acquired

'

'

'

'

'

'

'

'

14,900,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Estimated uncollectible amount of trade accounts receivables acquired

'

'

'

'

'

'

'

'

1,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Estimated remaining life

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'16 years

'4 years

'

'

'

'

'

'

'

Issued and outstanding shares held by noncontrolling interests

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2,007,452

'

'

Options not subject to support agreements held by noncontrolling interests

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

484,097

'

'

Pro forma adjustment, amortization expense

'

'

'

'

'

'

'

'

'

'

'

-100,000

12,300,000

'

2,800,000

24,500,000

'

'

'

'

'

'

'

'

'

'

Pro forma adjustment, transaction-related expense

'

'

'

'

'

'

'

'

'

'

'

'

'

'

40,700,000

'

'

'

'

'

'

'

'

'

'

'

Pro forma adjustment, interest expense

'

'

'

'

'

'

'

'

'

'

'

'

5,600,000

'

1,400,000

11,200,000

'

'

'

'

'

'

'

'

'

'

Pro forma adjustment, non-recurring expenses

'

'

'

'

'

'

'

'

'

'

'

-6,600,000

4,500,000

'

-39,500,000

17,300,000

'

'

'

'

'

'

'

'

'

'

Acquired in-process research and development

0

0

127,000,000

4,000,000

'

125,000,000

2,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Maximum potential milestones payments

'

'

'

'

$272,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Components_of_Inventories_Deta

Components of Inventories (Detail) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Inventory Disclosure [Abstract]	'	'
Raw materials	$3,155	$3,506
Work in process	12,246	10,301
Finished goods	17,697	14,862
Total inventories	$33,098	$28,669

Inventories_Additional_Informa

Inventories - Additional Information (Detail) (USD $)	Dec. 31, 2013
In Millions, unless otherwise specified
Inventory Disclosure [Abstract]	'
Inventory, Step-up value	$0.20

Summary_of_Cash_Cash_Equivalen

Summary of Cash, Cash Equivalents and Marketable Securities (Detail) (USD $)	12 Months Ended				6 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2014	Dec. 31, 2013	Dec. 31, 2013
					Cash [Member]	Cash [Member]	Time deposits [Member]
Cash, cash equivalents and marketable securities [Line Items]	'	'	'	'	'	'	'
Amortized Cost	$636,504	'	'	'	$268,255	$495,990	$140,514
Gross Unrealized Gains	0	'	'	'	0	0	0
Gross Unrealized Losses	0	'	'	'	0	0	0
Estimated Fair Value	636,504	'	'	'	268,255	495,990	140,514
Cash and cash equivalents	$636,504	$268,255	$504,307	$387,196	$268,255	$495,990	$140,514

Fair_Value_Measurement_Availab

Fair Value Measurement Available-For-Sale Investments Measured at Fair Value on Recurring Basis (Detail) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Schedule of Available-for-sale Securities and Liabilities that are Measured at Fair Value [Line Items]	'	'
Estimated Fair Value	'	$636,504
Time deposits [Member]	'	'
Schedule of Available-for-sale Securities and Liabilities that are Measured at Fair Value [Line Items]	'	'
Estimated Fair Value	'	140,514
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Time deposits [Member]	'	'
Schedule of Available-for-sale Securities and Liabilities that are Measured at Fair Value [Line Items]	'	'
Estimated Fair Value	0	140,514
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Contingent consideration [Member]	'	'
Schedule of Available-for-sale Securities and Liabilities that are Measured at Fair Value [Line Items]	'	'
Contingent consideration	0	50,000
Estimate of Fair Value, Fair Value Disclosure [Member] | Fair Value, Measurements, Recurring [Member] | Time deposits [Member]	'	'
Schedule of Available-for-sale Securities and Liabilities that are Measured at Fair Value [Line Items]	'	'
Estimated Fair Value	0	140,514
Estimate of Fair Value, Fair Value Disclosure [Member] | Fair Value, Measurements, Recurring [Member] | Contingent consideration [Member]	'	'
Schedule of Available-for-sale Securities and Liabilities that are Measured at Fair Value [Line Items]	'	'
Contingent consideration	$0	$50,000

Fair_Value_Additional_Informat

Fair Value - Additional Information (Detail) (Term Loans [Member], USD $)	Jun. 30, 2014
Term Loans [Member]	'
Fair Value Measurements [Line Items]	'
Principal amount of term loan	$899,900,000
Fair value of term loan	901,000,000
Carrying value of term loan	$894,300,000

Property_and_Equipment_Detail

Property and Equipment (Detail) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Certain Balance Sheet Items [Abstract]	'	'
Construction-in-progress	$18,041	$4,388
Computer software	8,476	7,960
Machinery and equipment	7,495	417
Leasehold improvements	6,753	4,587
Computer equipment	6,550	5,610
Furniture and fixtures	2,279	1,897
Land and buildings	1,686	0
Subtotal	51,280	24,859
Less accumulated depreciation and amortization	-12,818	-10,613
Property and equipment, net	$38,462	$14,246

Accrued_Liabilities_Detail

Accrued Liabilities (Detail) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Certain Balance Sheet Items [Abstract]	'	'
Rebates and other sales deductions	$45,871	$38,772
Employee compensation and benefits	39,782	31,829
Sales returns reserve	17,214	21,110
Royalties	7,328	6,082
Accrued interest	6,174	4,150
Accrued construction-in-progress	3,298	450
Professional fees	3,209	5,225
Other	19,967	12,100
Total accrued liabilities	$142,843	$119,718

Goodwill_and_Intangible_Assets2

Goodwill and Intangible Assets - Additional Information (Detail) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014
Goodwill [Roll Forward]	'
Goodwill, beginning of period	$450,456
Goodwill arising from the Gentium Acquisition	308,642
Foreign exchange	1,216
Goodwill, end of period	$760,314

Gross_Carrying_Amounts_and_Net

Gross Carrying Amounts and Net Book Values of Intangible Assets (Detail) (USD $)	6 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount - Finite-Lived Intangible Assets	$1,649,625	$959,689
Accumulated Amortization - Finite-Lived Intangible Assets	-231,609	-181,552
Total	1,418,016	778,137
Gross Carrying Amount - Total Intangible Assets	1,911,613	993,948
Net Book Value - Total Intangible Assets	1,680,004	812,396
Acquired IPR&D assets [Member]	'	'
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]	'	'
In-process research and development	261,988	34,259
Acquired developed technologies [Member]	'	'
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]	'	'
Remaining Weighted- Average Useful Life (In years)	'13 years 3 months	'
Gross Carrying Amount - Finite-Lived Intangible Assets	1,632,060	957,089
Accumulated Amortization - Finite-Lived Intangible Assets	-227,380	-179,225
Total	1,404,680	777,864
Manufacturing Contracts [Member]	'	'
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]	'	'
Remaining Weighted- Average Useful Life (In years)	'3 years 7 months	'
Gross Carrying Amount - Finite-Lived Intangible Assets	14,612	0
Accumulated Amortization - Finite-Lived Intangible Assets	-1,610	0
Total	13,002	0
Trademarks [Member]	'	'
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]	'	'
Remaining Weighted- Average Useful Life (In years)	'0 years 6 months	'
Gross Carrying Amount - Finite-Lived Intangible Assets	2,953	2,600
Accumulated Amortization - Finite-Lived Intangible Assets	-2,619	-2,327
Total	$334	$273

Estimated_Future_Amortization_

Estimated Future Amortization Costs (Detail) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Estimated Amortization Expense	'	'
2014 (remainder)	$62,124	'
2015	119,472	'
2016	115,121	'
2017	115,030	'
2018	111,525	'
Thereafter	894,744	'
Total	$1,418,016	$778,137

Goodwill_and_Intangible_Assets3

Goodwill and Intangible Assets Narrative (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Goodwill and Intangible Assets Disclosure [Abstract]	'	'	'	'
Intangible asset impairment	$32,806	$0	$32,806	$0

LongTerm_Debt_Schedule_of_Debt

Long-Term Debt Schedule of Debt (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Debt Instrument [Line Items]	'	'
Total debt	$1,196,433	$549,976
Less current portion	9,473	5,572
Total long-term debt	1,186,960	544,404
Term Loans [Member]	'	'
Debt Instrument [Line Items]	'	'
Total debt	894,328	549,976
Other borrowings [Member]	'	'
Debt Instrument [Line Items]	'	'
Total debt	2,105	0
Revolving Credit Facility [Member] | Line of Credit [Member]	'	'
Debt Instrument [Line Items]	'	'
Total debt	$300,000	$0

Schedule_of_Maturities_Details

Schedule of Maturities (Details) (Second Credit Amendment [Member], USD $)	Jun. 30, 2014
In Thousands, unless otherwise specified
Second Credit Amendment [Member]	'
Long-term Debt, Fiscal Year Maturity [Abstract]	'
2014 (remainder)	$4,736
2015	9,475
2016	9,481
2017	309,487
2018	868,510
Thereafter	296
Total debt	$1,201,985

Debt_Details

Debt (Details) (USD $)

6 Months Ended

0 Months Ended

0 Months Ended

0 Months Ended

0 Months Ended

0 Months Ended

0 Months Ended

0 Months Ended

Jun. 30, 2014

Jun. 30, 2013

Dec. 31, 2013

Jun. 30, 2012

Jun. 30, 2013

Jun. 13, 2013

Jan. 23, 2014

Jan. 23, 2014

Jan. 23, 2014

Jun. 30, 2014

Jan. 23, 2014

Dec. 31, 2013

Jun. 30, 2012

Jun. 13, 2013

Jun. 30, 2013

Jan. 23, 2014

Jan. 23, 2014

Jan. 23, 2014

Jan. 23, 2014

Jun. 30, 2014

Jan. 23, 2014

Dec. 31, 2013

Jun. 30, 2014

Jan. 23, 2014

Jan. 23, 2014

Jan. 23, 2014

Jan. 23, 2014

Jan. 23, 2014

Jan. 23, 2014

Jan. 23, 2014

Jan. 23, 2014

Revolving Credit Facility [Member]

First Credit Amendment [Member]

First Credit Amendment [Member]

Second Credit Amendment [Member]

Second Credit Amendment [Member]

Additional Term Loan [Member]

Term Loans [Member]

Term Loans [Member]

Term Loans [Member]

Term Loans [Member]

Term Loans [Member]

Term Loans [Member]

Term Loans [Member]

Term Loans [Member]

Term Loans [Member]

Term Loans [Member]

Line of Credit [Member]

Line of Credit [Member]

Line of Credit [Member]

Revolving Credit Facility [Member]

Rate One [Member]

Rate One [Member]

Rate Two [Member]

Rate Two [Member]

Rate Three [Member]

Maximum [Member]

Maximum [Member]

Minimum [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Second Credit Amendment [Member]

First Credit Amendment [Member]

First Credit Amendment [Member]

Second Credit Amendment [Member]

Second Credit Amendment [Member]

Second Credit Amendment [Member]

Second Credit Amendment [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Second Credit Amendment [Member]

Term Loans [Member]

Second Credit Amendment [Member]

Term Loans [Member]

Term Loans [Member]

Rate Two [Member]

Rate Three [Member]

Rate Two [Member]

Prime Rate [Member]

LIBOR [Member]

Prime Rate [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Second Credit Amendment [Member]

Revolving Credit Facility [Member]

Second Credit Amendment [Member]

Second Credit Amendment [Member]

Term Loans [Member]

Term Loans [Member]

Term Loans [Member]

LIBOR [Member]

Second Credit Amendment [Member]

Second Credit Amendment [Member]

Second Credit Amendment [Member]

Debt Instrument [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Principal amount of term loan

'

'

'

'

'

'

'

'

$350,000,000

'

$554,400,000

'

$475,000,000

$557,200,000

'

$904,400,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Credit facility borrowing capacity

'

'

'

100,000,000

'

200,000,000

425,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Repayments of Secured Debt

4,804,000

463,124,000

'

'

'

'

'

'

'

'

'

'

'

457,200,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Interest Rate Reduction, Basis Points

'

'

'

'

1.50%

'

'

'

'

'

'

'

'

'

1.50%

0.25%

'

'

'

'

'

'

'

0.25%

'

0.50%

'

'

'

'

'

Long-term Debt

1,196,433,000

'

549,976,000

'

'

'

'

'

'

894,328,000

'

549,976,000

'

'

'

'

'

'

'

300,000,000

'

0

'

'

'

'

'

'

'

'

'

Debt maturity date

'

'

'

'

'

'

12-Jun-17

'

'

'

'

'

'

'

'

12-Jun-18

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Basis spread on variable rate

'

'

'

'

'

'

'

1.50%

'

'

'

'

'

'

'

'

'

1.50%

2.50%

'

'

'

'

'

'

'

'

'

'

'

'

Term loan interest rate minimum percentage

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0.75%

1.75%

'

'

'

'

'

'

'

'

'

'

'

'

'

Commitment fee on credit facility, percentage

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0.25%

'

0.50%

'

'

'

'

'

Mandatory prepayments as percentage of excess cash flow beginning in 2014

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

50.00%

'

25.00%

0.00%

'

'

'

Debt Instrument, Mandatory Prepayments Secured Leverage Ratio

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2.25

1.25

1.25

Term loan, frequency of periodic payment

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'quarterly

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Percentage of principal amount for repayment

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Current portion of long-term debt

9,473,000

'

5,572,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Deferred financing costs, gross

'

'

'

'

'

'

'

'

'

'

21,700,000

'

'

'

'

'

'

'

'

'

5,400,000

'

'

'

'

'

'

'

'

'

'

Debt Instrument, Unamortized Discount

'

'

'

'

'

'

'

'

'

'

$6,100,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Interest rate

'

'

'

'

'

'

'

'

'

3.25%

'

'

'

'

'

'

'

'

'

'

'

'

2.65%

'

'

'

'

'

'

'

'

Term loan effective interest rate

'

'

'

'

'

'

'

'

'

4.10%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Future_Minimum_Lease_Payments_

Future Minimum Lease Payments under Noncancelable Operating Leases (Detail) (USD $)	Jun. 30, 2014
In Thousands, unless otherwise specified
Lease Payments	'
2014 (remainder)	$5,414
2015	10,021
2016	7,292
2017	3,956
2018	910
Thereafter	174
Total	$27,767

Commitments_and_Contingencies_1

Commitments and Contingencies - Additional Information (Detail) (USD $)	Jun. 30, 2014	Oct. 19, 2011	Oct. 18, 2010	Jun. 04, 2014	4-May-14	Nov. 21, 2013	Dec. 10, 2012	Oct. 18, 2010	Dec. 31, 2008	Jan. 31, 2014
		Pending Litigation [Member]	Xyrem ANDA Matters [Member]	Xyrem ANDA Matters [Member]	Xyrem ANDA Matters [Member]	Xyrem ANDA Matters [Member]	Xyrem ANDA Matters [Member]	Xyrem ANDA Matters [Member]	FazaClo ANDA Matters [Member]	Gentium [Member]
				Pending Litigation [Member]	Pending Litigation [Member]	Pending Litigation [Member]	Pending Litigation [Member]	Pending Litigation [Member]	Pending Litigation [Member]	Pending Litigation [Member]
				patent		patent	patent	patent	manufacturer
Commitments and Contingencies Disclosure [Line Items]	'	'	'	'	'	'	'	'	'	'
Noncancelable purchase commitments, due within one year	$37,400,000	'	'	'	'	'	'	'	'	'
Number of patents allegedly infringed upon	'	'	'	11	'	10	7	5	'	'
Court ordered stay period	'	'	'30 months	'	'30 months	'	'	'	'	'
Number of generic manufacturers that certifications were received from	'	'	'	'	'	'	'	'	3	'
Amounts sought in alleged breach of contractual obligations - minimum	'	10,500,000	'	'	'	'	'	'	'	'
Amounts sought in alleged breach of contractual obligations - maximum	'	$25,000,000	'	'	'	'	'	'	'	'
Share price (in dollars per share)	'	'	'	'	'	'	'	'	'	$57

Share_Repurchase_Program_Detai

Share Repurchase Program (Detail) (Ordinary Options [Member], USD $)	1 Months Ended	3 Months Ended	6 Months Ended
Share data in Millions, except Per Share data, unless otherwise specified	31-May-13	Jun. 30, 2014	Jun. 30, 2014
Ordinary Options [Member]	'	'	'
Stock Activity [Line Items]	'	'	'
Total amount authorized for repurchase of shares under share repurchase program	$200,000,000	'	'
Shares repurchased	'	23,500,000	23,500,000
Shares repurchased (in shares)	'	0.2	0.2
Average price of shares repurchased (in dollars per share)	'	$127.96	$127.96
Remaining amount authorized for repurchase of shares	'	'	$40,100,000

Shareholders_Equity_Details

Shareholders Equity (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'
Shareholders equity, beginning of period	'	'	$1,295,534	'
Noncontrolling interests from the Gentium Acquisition	'	'	136,578	'
Acquisition of noncontrolling interests	'	'	-136,640	'
Issuance of ordinary shares in conjunction with employee equity incentive and purchase plans and warrant exercises	'	'	31,642	'
Employee withholding taxes related to share-based awards	'	'	-10,551	'
Share-based compensation	'	'	32,476	'
Tax benefit from employee share options	'	'	792	'
Shares repurchased	'	'	-23,487	'
Other comprehensive income	'	'	3,796	'
Net income (loss)	43,586	42,185	-50,053	85,610
Shareholders equity, end of period	1,280,087	'	1,280,087	'
Parent [Member]	'	'	'	'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'
Shareholders equity, beginning of period	'	'	1,295,534	1,121,292
Acquisition of noncontrolling interests	'	'	-1,517	'
Issuance of ordinary shares in conjunction with employee equity incentive and purchase plans and warrant exercises	'	'	31,642	15,463
Employee withholding taxes related to share-based awards	'	'	-10,551	-1,597
Share-based compensation	'	'	32,476	20,089
Tax benefit from employee share options	'	'	792	0
Shares repurchased	'	'	-23,487	-53,578
Other comprehensive income	'	'	3,793	-11,826
Net income (loss)	'	'	-48,991	85,610
Shareholders equity, end of period	1,279,691	1,175,453	1,279,691	1,175,453
Noncontrolling Interest [Member]	'	'	'	'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'
Noncontrolling interests from the Gentium Acquisition	'	'	136,578	'
Acquisition of noncontrolling interests	'	'	-135,123	'
Other comprehensive income	'	'	3	'
Net income (loss)	'	'	-1,062	'
Shareholders equity, end of period	$396	'	$396	'

Component_of_Accumulated_Other

Component of Accumulated Other Comprehensive Income (Detail) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
Increase (Decrease) in Accumulated Other Comprehensive Income (Loss) [Roll Forward]	'	'
Balance at December 31, 2013	$56,153	'
Other comprehensive income	3,796	'
Balance at June 30, 2014	59,946	'
Foreign Currency Translation Adjustments [Member]	'	'
Increase (Decrease) in Accumulated Other Comprehensive Income (Loss) [Roll Forward]	'	'
Balance at December 31, 2013	56,153	'
Other comprehensive income	3,793	'
Balance at June 30, 2014	59,946	'
Parent [Member]	'	'
Increase (Decrease) in Accumulated Other Comprehensive Income (Loss) [Roll Forward]	'	'
Balance at December 31, 2013	56,153	'
Other comprehensive income	3,793	-11,826
Balance at June 30, 2014	$59,946	'

ShareBased_Compensation_Expens

Share-Based Compensation Expense (Detail) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'	'
Share-based compensation expense	$18,552	$11,506	$32,367	$20,263
Tax benefit from share-based compensation expense	-5,416	-3,535	-9,702	-6,348
Total share-based compensation expense, net of tax	13,136	7,971	22,665	13,915
Selling, general and administrative [Member]	'	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'	'
Share-based compensation expense	14,042	9,539	25,217	16,544
Research and development [Member]	'	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'	'
Share-based compensation expense	3,226	1,479	5,685	2,522
Cost of product sales [Member]	'	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'	'
Share-based compensation expense	$1,284	$488	$1,465	$1,197

WeightedAverage_Assumptions_Us

Weighted-Average Assumptions Used in Black-Scholes Option Pricing Model Which Was Used to Estimate Grant Date Fair Value per Share (Detail) (Employee Stock Option [Member], USD $)	3 Months Ended		6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Employee Stock Option [Member]	'	'	'	'
Schedule of Weighted Average Assumptions for Fair Values of Stock Options[Line Items]	'	'	'	'
Shares underlying options granted (in shares)	101	161	807	1,172
Weighted-average grant date fair value (in dollars per share)	$53.26	$27.53	$61.85	$27.72
Weighted-average volatility	45.00%	58.00%	46.00%	59.00%
Weighted-average expected term (years)	'4 years 3 months 24 days	'4 years 4 months 24 days	'4 years 3 months 24 days	'4 years 4 months 24 days
Range of risk-free rates, minimum	1.30%	0.50%	1.10%	0.50%
Range of risk-free rates, maximum	1.40%	0.80%	1.40%	0.80%
Expected dividend yield	0.00%	0.00%	0.00%	0.00%

ShareBased_Compensation_Restri

Share-Based Compensation Restricted Units (Details) (Restricted Stock Units (RSUs) [Member], USD $)	3 Months Ended		6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Restricted Stock Units (RSUs) [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Units granted	51	75	392	522
Weighted average grand date fair value (in dollars per share)	$141.36	$59.43	$162.48	$59

ShareBased_Compensation_Additi

Share-Based Compensation - Additional Information (Detail) (USD $)	6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014
Stock Options [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Unrecognized compensation cost related to unvested stock option and RSUs	$78.40
Weighted-average period expected to be recognized	'2 years 7 months 24 days
Restricted Stock Units (RSUs) [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Vesting period	'4 years
Unrecognized compensation cost related to unvested stock option and RSUs	$79.50
Weighted-average period expected to be recognized	'2 years 8 months 24 days

Related_Party_Transactions_Add

Related Party Transactions - Additional Information (Detail) (Affiliated Entity [Member], Exercise of Warrant [Member], USD $)	1 Months Ended
In Millions, except Share data, unless otherwise specified	Feb. 28, 2014
Affiliated Entity [Member] | Exercise of Warrant [Member]	'
Related Party Transaction [Line Items]	'
Number of shares purchased with warrants exercised	947,867
Proceeds from warrant exercises	$3.80
Expenses paid by Company related to warrant transactions	$0.10

Segment_and_Other_Information_1

Segment and Other Information - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2014
	Segment
Segment Reporting [Abstract]	'
Number of operating business segment	1

Summary_of_Total_Revenues_Deta

Summary of Total Revenues (Detail) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Revenue from External Customer [Line Items]	'	'	'	'
Product sales, net	$289,100	$206,564	$534,086	$401,216
Royalties and contract revenues	2,130	1,688	4,063	3,273
Total revenues	291,230	208,252	538,149	404,489
Xyrem [Member]	'	'	'	'
Revenue from External Customer [Line Items]	'	'	'	'
Product sales, net	191,366	133,742	351,744	251,268
Erwinaze And Erwinase [Member]	'	'	'	'
Revenue from External Customer [Line Items]	'	'	'	'
Product sales, net	47,869	44,860	94,789	86,676
Defitelio [Member]	'	'	'	'
Revenue from External Customer [Line Items]	'	'	'	'
Product sales, net	20,244	0	32,453	0
Prialt [Member]	'	'	'	'
Revenue from External Customer [Line Items]	'	'	'	'
Product sales, net	5,831	4,694	10,140	9,680
Psychiatry [Member]	'	'	'	'
Revenue from External Customer [Line Items]	'	'	'	'
Product sales, net	11,732	11,764	21,598	29,414
Other [Member]	'	'	'	'
Revenue from External Customer [Line Items]	'	'	'	'
Product sales, net	$12,058	$11,504	$23,362	$24,178

Summary_of_Total_Revenues_Attr

Summary of Total Revenues Attributed to Geographic Sources (Detail) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'	'
Total revenues	$291,230	$208,252	$538,149	$404,489
United States [Member]	'	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'	'
Total revenues	247,525	191,274	462,481	368,185
Europe [Member]	'	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'	'
Total revenues	30,687	13,074	55,030	27,436
Other [Member]	'	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'	'
Total revenues	$13,018	$3,904	$20,638	$8,868

Summary_of_Revenues_from_Custo

Summary of Revenues from Customers Representing at Least 10% of Total Revenues (Detail) (Sales Revenue, Goods, Net [Member])	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Express Scripts [Member]	'	'	'	'
Revenue, Major Customer [Line Items]	'	'	'	'
Percentage of total revenues	65.00%	64.00%	65.00%	62.00%
Accredo Health Group, Inc. [Member]	'	'	'	'
Revenue, Major Customer [Line Items]	'	'	'	'
Percentage of total revenues	13.00%	18.00%	14.00%	17.00%

Total_LongLived_Assets_by_Loca

Total Long-Lived Assets by Location (Detail) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'
Property and equipment, net	$38,462	$14,246
Ireland [Member]	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'
Property and equipment, net	19,481	5,799
Italy [Member]	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'
Property and equipment, net	10,043	0
United States [Member]	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'
Property and equipment, net	8,021	7,734
Other [Member]	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'
Property and equipment, net	$917	$713

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Income Taxes [Line Items]	'	'	'	'
Income tax provision	$19,350	$23,605	$36,377	$41,239
Effective income tax rate, percentage	30.70%	35.90%	32.10%	32.50%
Acquired in-process research and development	$0	$0	$127,000	$4,000
Ireland [Member]	'	'	'	'
Income Taxes [Line Items]	'	'	'	'
Effective statutory income tax rate, percentage	12.50%	'	12.50%	'

Subsequent_Event_Details

Subsequent Event (Details) (USD $)	3 Months Ended		6 Months Ended		0 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Aug. 04, 2014	Jul. 01, 2014
					Subsequent Event [Member]	Subsequent Event [Member]
					Sigma Tau [Member]	Sigma Tau [Member]
Subsequent Event [Line Items]	'	'	'	'	'	'
Acquired IPR&D assets	$0	$0	$127,000,000	$4,000,000	$75,000,000	'
Potential milestone payments under agreement	'	'	'	'	'	25,000,000
Potential milestone payments for FDA approval of defibrotide (up to $150.0 million)	'	'	'	'	'	$150,000,000