Valuation And Qualifying Accounts (In Thousands) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Allowance for doubtful accounts
Valuation Allowance for Impairment of Recognized Servicing Assets [Roll Forward]
Balance at Beginning of Period	$ 900	$ 0
Additions	3,209	900
Deductions Charged to Reserves	(948)	0
Balance at End of Period	3,161	900	$ 0
Accounts receivable allowances
Valuation Allowance for Impairment of Recognized Servicing Assets [Roll Forward]
Balance at Beginning of Period	10,783	11,618	2,728
Additions	122,792	93,887	60,054
Deductions Charged to Reserves	(124,042)	(94,722)	(51,164)
Balance at End of Period	9,533	10,783	11,618
Rebates, fees and returns reserves
Valuation Allowance for Impairment of Recognized Servicing Assets [Roll Forward]
Balance at Beginning of Period	45,162	43,892	4,819
Additions	186,941	120,293	52,548
Deductions Charged to Reserves	(142,637)	(119,023)	(13,475)
Balance at End of Period	89,466	45,162	43,892
Valuation allowance for deferred tax assets
Valuation Allowance for Impairment of Recognized Servicing Assets [Roll Forward]
Balance at Beginning of Period	11,859	33,557	166,416
Additions	632	0	20,299
Deductions Charged to Reserves	(11,062)	21,698	(153,158)
Balance at End of Period	$ 1,429	$ 11,859	$ 33,557