Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash flows from operating activities:
Net income	$ 143,086	$ 133,046	$ 189,176
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	72,397	71,365	54,924
Japan customs expense	31,355	0	0
Foreign currency (gains)/losses	8,863	27,235	53,828
Stock-based compensation	8,890	7,400	17,504
Deferred taxes	(17,652)	17,362	10,399
Changes in operating assets and liabilities:
Accounts receivable	3,357	(2,246)	30,766
Inventories, net	9,801	59,652	(16,518)
Prepaid expenses and other	37,789	13,572	(25,167)
Other assets	(3,969)	(15,752)	(16,219)
Accounts payable	13,443	(4,297)	(45,953)
Accrued expenses	(33,624)	15,902	(309,180)
Other liabilities	1,527	(1,130)	(24)
Net cash provided by (used in) operating activities	275,263	322,109	(56,464)
Cash flows from investing activities:
Purchases of property and equipment	(50,221)	(56,622)	(101,476)
Proceeds on investment sales	18,132	11,526	27,328
Purchases of investments	(17,080)	(15,750)	(17,522)
Acquisitions	(8,692)	0	0
Net cash used in investing activities	(57,861)	(60,846)	(91,670)
Cash flows from financing activities:
Payment of cash dividends	(78,438)	(81,187)	(81,371)
Repurchase of shares of common stock	(247,208)	(164,094)	(45,724)
Exercise of employee stock options and taxes paid related to the net shares settlement of stock awards	14,307	3,315	(2,420)
Income tax benefit of equity awards	5,651	5,337	11,801
Payments on long-term debt	(56,151)	(35,508)	(333,803)
Payment of debt issuance costs	(6,596)	0	(5,739)
Proceeds from long-term debt	233,721	36,217	416,180
Net cash used in financing activities	(134,714)	(235,920)	(41,076)
Effect of exchange rate changes on cash	(14,796)	(24,404)	(47,528)
Net increase (decrease) in cash and cash equivalents	67,892	939	(236,738)
Cash and cash equivalents, beginning of period	289,354	288,415	525,153
Cash and cash equivalents, end of period	$ 357,246	$ 289,354	$ 288,415