Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash flows from operating activities:
Net income	$ 104,901	$ 97,206
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	53,402	52,101
Japan customs expense	31,355	0
Foreign currency losses	14,749	24,953
Stock-based compensation	5,163	4,444
Deferred taxes	(5,718)	12,110
Changes in operating assets and liabilities:
Accounts receivable	671	(2,067)
Inventories, net	14,957	65,692
Prepaid expenses and other	(59,230)	(3,586)
Other assets	(3,842)	(18,387)
Accounts payable	10,927	2,252
Accrued expenses	19,635	15,455
Other liabilities	(1,540)	(8,209)
Net cash provided by operating activities	185,430	241,964
Cash flows from investing activities:
Purchases of property and equipment	(35,019)	(44,171)
Proceeds of investment sales	14,591	11,526
Purchases of investments	(17,024)	(11,526)
Acquisitions	(4,400)	0
Net cash used in investing activities	(41,852)	(44,171)
Cash flows from financing activities:
Exercises of employee stock options	6,295	(1,107)
Payments of cash dividends	(59,585)	(61,382)
Payments on debt financing	(50,452)	(31,954)
Proceeds from long-term debt	233,721	36,217
Payment of debt issuance costs	(6,596)	0
Income tax benefit of options exercised	4,186	4,731
Repurchases of shares of common stock	(41,693)	(104,058)
Net cash provided by (used in) financing activities	85,876	(157,553)
Effect of exchange rate changes on cash	(1,814)	(22,847)
Net increase in cash and cash equivalents	227,640	17,393
Cash and cash equivalents, beginning of period	289,354	288,415
Cash and cash equivalents, end of period	$ 516,994	$ 305,808