Allowances (Schedule Of Allowances and Reserves) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Balance	$ 49,364	$ 32,392	$ 10,513
Reduction in revenues	82,031	82,755	75,231
Expense	6,079	26,225	12,087
Recoveries, applied amounts, and write-offs	(89,336)	(92,008)	(65,439)
Ending Balance	48,138	49,364	32,392
Allowance for Doubtful Accounts [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Balance	36,368	13,609	3,656
Reduction in revenues	0	0	0
Expense	6,079	26,225	12,087
Recoveries, applied amounts, and write-offs	(9,591)	(3,466)	(2,134)
Ending Balance	32,856	36,368	13,609
Reserve for Sales Returns and Allowances [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Balance	4,639	7,214	5,410
Reduction in revenues	72,995	71,649	69,834
Expense	0	0	0
Recoveries, applied amounts, and write-offs	(71,513)	(74,224)	(68,030)
Ending Balance	6,121	4,639	7,214
Reserve For Unapplied Rebates [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Balance	8,357	11,569	1,447
Reduction in revenues	9,036	11,106	5,397
Expense	0	0	0
Recoveries, applied amounts, and write-offs	(8,232)	(14,318)	4,725
Ending Balance	9,161	8,357	11,569
China [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Balance	36,444	21,106	1,300
Reduction in revenues	10,623	11,280	6,921
Expense	1,097	23,163	8,552
Recoveries, applied amounts, and write-offs	(15,340)	(19,105)	4,333
Ending Balance	32,824	36,444	21,106
China [Member] | Allowance for Doubtful Accounts [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Balance	30,288	8,440	24
Reduction in revenues	0	0	0
Expense	1,097	23,163	8,552
Recoveries, applied amounts, and write-offs	(5,752)	(1,315)	(136)
Ending Balance	25,633	30,288	8,440
China [Member] | Reserve for Sales Returns and Allowances [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Balance	194	4,043	225
Reduction in revenues	9,243	7,769	6,921
Expense	0	0	0
Recoveries, applied amounts, and write-offs	(8,575)	(11,618)	(3,103)
Ending Balance	862	194	4,043
China [Member] | Reserve For Unapplied Rebates [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Balance	5,962	8,623	1,051
Reduction in revenues	1,380	3,511	0
Expense	0	0	0
Recoveries, applied amounts, and write-offs	(1,013)	(6,172)	7,572
Ending Balance	$ 6,329	$ 5,962	$ 8,623