Selected Quarterly Financial Data (Unaudited) - Goodwill and Other Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended		9 Months Ended		12 Months Ended
	Dec. 31, 2015	Mar. 31, 2015	Mar. 31, 2014	Jun. 30, 2015	Jun. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 1,045,723	$ 1,042,140	$ 181,140	$ 1,042,857	$ 516,172	$ 1,045,136	$ 987,591	$ 1,045,723	$ 1,042,063	$ 169,598
Accumulated Amortization	(144,107)	(98,060)	(43,924)	(114,260)	(51,581)	(130,706)	(65,308)	(144,107)	(81,660)	(39,093)
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)				(2,627)		(2,627)
Net Carrying amount	864,989	944,080	137,216	925,970	464,591	911,803	922,283	864,989	960,403	130,505
Impairment of intangible assets	30,376							30,376
Licensing Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross		778,734	162,887	779,234	476,659	781,569	729,628		778,734	151,504
Accumulated Amortization		(89,244)	(39,954)	(104,547)	(46,871)	(120,126)	(58,501)		(73,943)	(35,604)
Reclassifications						38,000
Net Carrying amount		$ 689,490	$ 122,933	$ 674,687	$ 429,788	$ 699,443	$ 671,127		$ 704,791	$ 115,900
Weighted Average Remaining Amortization Period		13 years 10 months 24 days	10 years	13 years 8 months 12 days	13 years 9 months 18 days	13 years 4 months 24 days	12 years 7 months 6 days		12 years 1 month 6 days	9 years 9 months 18 days
Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	16,000	$ 16,000	$ 9,500	$ 16,000	$ 15,000	$ 16,000	$ 16,000	16,000	$ 16,000	$ 9,500
Accumulated Amortization	(2,982)	(2,036)	(924)	(2,352)	(1,128)	(2,667)	(1,406)	(2,982)	(1,721)	(844)
Net Carrying amount	13,018	$ 13,964	$ 8,576	$ 13,648	$ 13,872	$ 13,333	$ 14,594	$ 13,018	$ 14,279	$ 8,656
Weighted Average Remaining Amortization Period		22 years 7 months 6 days	27 years 2 months 12 days	22 years 3 months 18 days	19 years 10 months 24 days	22 years 1 month 6 days	18 years 7 months 6 days	21 years 9 months 18 days	18 years 7 months 6 days	27 years 4 months 24 days
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	6,493	$ 6,464	$ 6,243	$ 6,424	$ 6,561	$ 6,342	$ 6,502	$ 6,493	$ 6,502	$ 6,166
Accumulated Amortization	(3,716)	(3,569)	(1,736)	(3,607)	(2,002)	(3,590)	(3,327)	(3,716)	(3,467)	(1,528)
Net Carrying amount	2,777	$ 2,895	$ 4,507	$ 2,817	$ 4,559	$ 2,752	$ 3,175	$ 2,777	$ 3,035	$ 4,638
Weighted Average Remaining Amortization Period		12 years 6 months	9 years 7 months 6 days	12 years 2 months 12 days	9 years	12 years	11 years	11 years 8 months 12 days	11 years	9 years 9 months 18 days
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	11,235	$ 11,234		$ 11,234	$ 6,000	$ 11,234	$ 11,200	$ 11,235	$ 11,235
Accumulated Amortization	(2,600)	(1,309)		(1,739)	(68)	(2,170)	(445)	(2,600)	(879)
Net Carrying amount	8,635	$ 9,925		$ 9,495	$ 5,932	$ 9,064	$ 10,755	$ 8,635	$ 10,356
Weighted Average Remaining Amortization Period		8 years 8 months 12 days		8 years 4 months 24 days	4 years 9 months 18 days	8 years 2 months 12 days	7 years 7 months 6 days	7 years 10 months 24 days	7 years 6 months	0 years
Noncompete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	2,167	$ 2,449	$ 2,510	$ 2,406	$ 2,552	$ 2,431	$ 2,490	$ 2,167	$ 2,333	$ 2,428
Accumulated Amortization	$ (2,167)	(1,902)	(1,310)	(2,015)	(1,512)	(2,153)	(1,629)	$ (2,167)	(1,650)	(1,117)
Net Carrying amount		$ 547	$ 1,200	$ 391	$ 1,040	$ 279	$ 861		$ 683	$ 1,311
Weighted Average Remaining Amortization Period		9 months 18 days	1 year 10 months 24 days	6 months	1 year 8 months 12 days	3 months 18 days	1 year 4 months 24 days		1 year 4 months 24 days	2 years 2 months 12 days
IPR&D [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross		$ 227,259		$ 227,559	$ 9,400	$ 227,559	$ 221,771		$ 227,259
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)				(2,627)		(2,627)
Reclassifications						(38,000)
Net Carrying amount		$ 227,259		$ 224,932	$ 9,400	$ 186,932	$ 221,771		$ 227,259
Weighted Average Remaining Amortization Period				0 years	0 years		0 years		0 years	0 years