Accounts Receivable - Schedule of Accounts Receivable (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Sep. 28, 2012	Dec. 31, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, net	$ 158,732	$ 143,279
Successor [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross trade accounts receivable	565,694	383,347
Deductions from trade accounts receivable	(406,608)	(240,061)	(195,702)		(163,025)
Allowance for doubtful accounts	(354)	(7)	0	(100)
Accounts receivable, net	158,732	143,279
Successor [Member] | Chargebacks [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Deductions from trade accounts receivable	(96,492)	(48,766)	(41,670)		(24,223)
Successor [Member] | Rebates and incentive programs [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Deductions from trade accounts receivable	(138,989)	(75,321)	(59,426)		(43,866)
Successor [Member] | Returns [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Deductions from trade accounts receivable	(84,330)	(78,181)	(68,062)		(64,119)
Successor [Member] | Cash discounts and other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Deductions from trade accounts receivable	$ (86,797)	$ (37,793)	$ (26,544)		$ (30,817)