Significant Accounting Policies Sales Allowances and Accruals (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash Discounts [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Sales Allowances and Accurals, Beginning of Period	$ 2,662	$ 2,010	$ 1,849
Allowance for Sales, Current Period	18,299	15,943	12,240
Allowance for Sales, Prior Period	0	0	0
Actual Sales Credits, Prior Period	(2,411)	(1,871)	(1,849)
Actual Sales Credits, Current Period	(14,408)	(13,420)	(10,230)
Sales Allowances and Accurals, End of Period	4,142	2,662	2,010
Returns [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Sales Allowances and Accurals, Beginning of Period	2,433	1,113	3,871
Allowance for Sales, Current Period	5,836	2,524	854
Allowance for Sales, Prior Period	0	0	0
Actual Sales Credits, Prior Period	(1,724)	(1,204)	(3,612)
Actual Sales Credits, Current Period	(3,196)	0	0
Sales Allowances and Accurals, End of Period	3,349	2,433	1,113
Chargebacks [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Sales Allowances and Accurals, Beginning of Period	25,040	14,843	15,640
Allowance for Sales, Current Period	175,001	130,374	68,179
Allowance for Sales, Prior Period	0	0	0
Actual Sales Credits, Prior Period	(25,888)	(10,244)	(9,673)
Actual Sales Credits, Current Period	(129,754)	(109,933)	(59,303)
Sales Allowances and Accurals, End of Period	44,399	25,040	14,843
Rebates [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Sales Allowances and Accurals, Beginning of Period	0	0	1,170
Allowance for Sales, Current Period	0	0	0
Allowance for Sales, Prior Period	0	0	0
Actual Sales Credits, Prior Period		0	(1,170)
Actual Sales Credits, Current Period	0	0	0
Sales Allowances and Accurals, End of Period	0	0	0
Fees-for-Service [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Sales Allowances and Accurals, Beginning of Period	3,127	3,577	3,269
Allowance for Sales, Current Period	12,453	12,059	9,914
Allowance for Sales, Prior Period	0	0	0
Actual Sales Credits, Prior Period	(3,246)	(3,049)	(2,885)
Actual Sales Credits, Current Period	(11,410)	(9,460)	(6,721)
Sales Allowances and Accurals, End of Period	$ 924	$ 3,127	$ 3,577