Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash flows from operating activities:
Net income	$ 27,489	$ 3,316
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	17,625	16,945
Equity method earnings	(104)	0
Japan customs expense	0	31,355
Foreign currency (gains)/losses	791	2,411
Stock-based compensation	3,929	2,447
Deferred taxes	4,522	3,668
Changes in operating assets and liabilities:
Accounts receivable	3,269	4,254
Inventories, net	2,340	(6,906)
Prepaid expenses and other	(12,088)	(68,479)
Other assets	(2,023)	2,361
Accounts payable	(125)	4,607
Accrued expenses	(26,282)	5,128
Other liabilities	1,984	(3,823)
Net cash provided by (used in) operating activities	21,327	(2,716)
Cash flows from investing activities:
Purchases of property and equipment	(15,928)	(10,942)
Proceeds on investment sales	4,188	3,902
Purchases of investments	(4,716)	(4,538)
Acquisitions	0	(3,300)
Investment in equity investee	(12,600)	0
Net cash used in investing activities	(29,056)	(14,878)
Cash flows from financing activities:
Exercise of employee stock options and taxes paid related to the net shares settlement of stock awards	164	2,271
Payments on long-term debt	(17,830)	(15,308)
Payment of cash dividends	(18,987)	(19,840)
Income tax benefit of equity awards	0	3,402
Proceeds from long-term debt	25,000	23,721
Repurchases of shares of common stock	(6,816)	(20,006)
Net cash used in financing activities	(18,469)	(25,760)
Effect of exchange rate changes on cash	4,530	4,087
Net decrease in cash and cash equivalents	(21,668)	(39,267)
Cash and cash equivalents, beginning of period	357,246	289,354
Cash and cash equivalents, end of period	$ 335,578	$ 250,087