Goodwill and Other Intangible Assets - Major Categories of Intangible Assets (Details) $ in Thousands	3 Months Ended			6 Months Ended		9 Months Ended		12 Months Ended
	Dec. 31, 2015 USD ($)	Mar. 31, 2015 USD ($)	Mar. 31, 2014 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Dec. 31, 2015 USD ($) item	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Oct. 01, 2015 USD ($)
Major categories of intangible assets
Gross Carrying Amount	$ 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 - indefinite lived intangible assets				(2,627)		(2,627)
Total impairment								(36,627)
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
Number of previous IPR&D assets reclassified | item								1
Product Licensing Rights [Member]
Major categories of intangible assets
Gross Carrying Amount	782,269							$ 782,269
Accumulated Amortization	(132,642)							(132,642)			$ (3,600)
Reclassifications (1)								38,000
Impairment of product licensing rights, stated at gross carrying cost								(34,000)
Net Carrying amount	653,627							$ 653,627
Weighted Average Remaining Amortization Period								13 years 2 months 12 days
Impairment of intangible assets								$ (30,376)
Weighted Average Remaining Amortization Period (years)								13 years 2 months 12 days
Trademarks [Member]
Major categories of intangible assets
Gross Carrying Amount	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
Weighted Average Remaining Amortization Period (years)		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]
Major categories of intangible assets
Gross Carrying Amount	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
Weighted Average Remaining Amortization Period (years)		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]
Major categories of intangible assets
Gross Carrying Amount	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
Weighted Average Remaining Amortization Period (years)		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]
Major categories of intangible assets
Gross Carrying Amount	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
Weighted Average Remaining Amortization Period (years)		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]
Major categories of intangible assets
Gross Carrying Amount	227,559							227,559
Reclassifications (1)								(38,000)
Impairment - indefinite lived intangible assets								(2,627)
Net Carrying Amount - IPR&D	$ 186,932							$ 186,932