Summary of Significant Accounting Policies - Narrative (Details) - USD ($) $ in Thousands, shares in Millions	1 Months Ended	12 Months Ended				36 Months Ended
	Jun. 30, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2016	May 31, 2017
Summary Of Significant Accounting Policies [Line Items]
Noncurrent restricted cash		$ 1,800	$ 3,300			$ 3,300
Chargeback period, extended period		84 days
Chargebacks		$ 953,326	$ 1,218,560	$ 1,065,244
Sales chargebacks as a percentage of gross sales		40.50%	42.10%
Gross sales		$ 2,351,071	$ 2,891,267	2,511,693
Change in ratio of direct to indirect sales for chargeback reserves used in sensitivity analysis		4.40%
Potential increase in chargeback expense based on sensitivity analysis		$ 200
Potential decrease in chargeback expense based on sensitivity analysis		2,300
Rebates, administrative fees and others		$ 476,601	$ 463,724	367,514
Rebates, administrative and other fees as a percentage of gross sales		20.30%	16.00%
Change in ratio of direct to indirect sales for rebates, administrative and other fees used in sensitivity analysis		4.40%
Potential increase in rebates, administrative and other fees expense based on sensitivity analysis		$ 0
Potential decrease in rebates, administrative and other fees expense based on sensitivity analysis		1,100
Product returns		$ 26,874	$ 28,285	34,272
Sales returns as a percentage of gross sales		1.10%	1.00%
Change in lag time to process returns for sales returns reserve used in sensitivity analysis		9 months 18 days
Potential increase in sales returns expense based on sensitivity analysis		$ 1,400
Potential decrease in sales returns expense based on sensitivity analysis		2,200
Past due gross accounts receivable		16,900
Past due gross accounts receivable, aged over 60 days		4,700
Provision for Inventory obsolescence		21,369	$ 32,072	8,800
Allowance for inventory obsolescence		34,402	33,532	21,537		33,532
Research and development reserve		1,500	2,400
Depreciation		$ 23,700	$ 22,200	$ 19,900
Shares excluded from the computation of diluted net earnings per share (in Shares)		3.2	3.6	0.9
Available-for-sale securities		$ 35	$ 1,106			1,106
Gain on sale of available-for-sale security		199	45	$ 237
Nicox
Summary Of Significant Accounting Policies [Line Items]
Available-for-sale securities							$ 3,000
Original cost basis		1,500			$ 10,800
Unrealized gain from original cost basis					1,700
Available-for-sale securities sold		1,500				$ 9,200
Gain realized on sale of securities		$ 200
Proceeds from sale	$ 2,600		$ 6,000	$ 2,500
Gain on sale of available-for-sale security	$ 400
Nicox | Initial Value
Summary Of Significant Accounting Policies [Line Items]
Available-for-sale securities					$ 12,500
Minimum
Summary Of Significant Accounting Policies [Line Items]
Chargeback period		28 days
Maximum
Summary Of Significant Accounting Policies [Line Items]
Chargeback period		42 days