Accounts Receivable (Schedule of Accounts Receivable) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Sep. 28, 2012	Dec. 31, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, net	$ 143,279	$ 123,091
Successor [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross trade accounts receivable	383,347	318,793
Deductions from trade accounts receivable	(240,061)	(195,702)		(143,164)
Allowance for doubtful accounts	(7)	0	(100)
Accounts receivable, net	143,279	123,091
Successor [Member] | Chargebacks [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Deductions from trade accounts receivable	(48,766)	(41,670)		(20,688)
Successor [Member] | Rebates and incentive programs [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Deductions from trade accounts receivable	(75,321)	(59,426)		(35,132)
Successor [Member] | Returns [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Deductions from trade accounts receivable	(78,181)	(68,062)		(58,672)
Successor [Member] | Cash discounts and other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Deductions from trade accounts receivable	$ (37,793)	$ (26,544)		$ (28,672)