Par Sterile Acquisition - Business Combination, Source of Funds and Use of Funds for Acquisition (Details) (USD $)	0 Months Ended
	Feb. 20, 2014		Dec. 31, 2014	Dec. 31, 2013
Business Acquisition [Line Items]
Company cash on hand			$ 244,440,000	$ 130,080,000
Par Sterile [Member]
Business Acquisition [Line Items]
Cash purchase of equity	487,429,000	[1]
Sponsor equity contribution	110,000,000
Transaction costs	12,350,000
Company cash on hand	1,133,000	[1]
Accrued interest on Company debt	6,354,000
Aggregate consideration	506,133,000
Senior Secured Term Loan [Member] | Par Sterile [Member]
Business Acquisition [Line Items]
Senior secured term loan	$ 395,000,000

[1] Adjusted to reflect the finalization of working capital adjustments noted above.