Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash flows from operating activities:
Net income	$ 133,046	$ 189,176	$ 364,888
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	71,365	54,924	34,923
Foreign currency (gains)/losses	27,235	53,828	(1,077)
Stock-based compensation	7,400	17,504	32,620
Deferred taxes	17,362	10,399	(41,748)
Changes in operating assets and liabilities:
Accounts receivable	(2,246)	30,766	(34,304)
Inventories, net	59,652	(16,518)	(207,436)
Prepaid expenses and other	13,572	(25,167)	(23,317)
Other assets	(15,752)	(16,219)	(22,619)
Accounts payable	(4,297)	(45,953)	32,643
Accrued expenses	15,902	(309,180)	389,093
Other liabilities	(1,130)	(24)	6,510
Net cash provided by (used in) operating activities	322,109	(56,464)	530,176
Cash flows from investing activities:
Purchases of property and equipment	(56,622)	(101,476)	(185,103)
Proceeds on investment sales	11,526	27,328	13,075
Purchases of investments	(15,750)	(17,522)	(21,671)
Net cash used in investing activities	(60,846)	(91,670)	(193,699)
Cash flows from financing activities:
Payment of cash dividends	(81,187)	(81,371)	(70,514)
Repurchase of shares of common stock	(164,094)	(45,724)	(140,865)
Exercise of employee stock options and taxes paid related to the net shares settlement of stock awards	3,315	(2,420)	34,370
Income tax benefit of equity awards	5,337	11,801	45,187
Payments on long-term debt	(35,508)	(333,803)	(37,903)
Payment of debt issuance costs	0	(5,739)	0
Proceeds from long-term debt	36,217	416,180	49,000
Net cash used in financing activities	(235,920)	(41,076)	(120,725)
Effect of exchange rate changes on cash	(24,404)	(47,528)	(10,624)
Net increase (decrease) in cash and cash equivalents	939	(236,738)	205,128
Cash and cash equivalents, beginning of period	288,415	525,153	320,025
Cash and cash equivalents, end of period	$ 289,354	$ 288,415	$ 525,153