Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Cash flows from operating activities:
Net income	$ 80,939	$ 74,361
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	34,101	24,965
Foreign currency (gains)/losses	13,811	48,264
Stock-based compensation	7,424	13,726
Deferred taxes	7,001	3,871
Changes in operating assets and liabilities:
Accounts receivable	(8,493)	27,121
Inventories, net	27,709	(54,218)
Prepaid expenses and other	11,333	(31,157)
Other assets	(16,500)	(14,797)
Accounts payable	5,112	(46,503)
Accrued expenses	4,910	(233,532)
Other liabilities	(7,745)	3,034
Net cash provided by operating activities	159,602	(184,865)
Cash flows from investing activities:
Purchases of property and equipment	(34,842)	(57,136)
Proceeds of investment sales	8,155	22,011
Purchases of investments	(8,155)	(13,655)
Net cash used in investing activities	(34,842)	(48,780)
Cash flows from financing activities:
Exercise of employee stock options	(1,039)	(2,656)
Payment of debt	(14,556)	(39,915)
Payment of cash dividends	(41,179)	(40,511)
Income tax benefit of options exercised	3,195	9,267
Proceeds from debt	20,000	65,680
Repurchases of shares of common stock	(75,862)	(25,002)
Net cash used in financing activities	(109,441)	(33,137)
Effect of exchange rate changes on cash	(11,320)	(38,870)
Net increase in cash and cash equivalents	3,999	(305,652)
Cash and cash equivalents, beginning of period	288,415	525,153
Cash and cash equivalents, end of period	$ 292,414	$ 219,501