Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash flows from operating activities:
Net income	$ 38,716	$ 47,430
Adjustments to reconcile net income to cash flows from operating activities:
Depreciation and amortization	17,130	18,344
Non-cash lease expense	10,581	13,298
Stock-based compensation	4,127	6,803
Foreign currency losses	370	970
Loss on disposal of assets	517	506
Deferred taxes	3,292	3,363
Changes in operating assets and liabilities:
Accounts receivable, net	(12,463)	436
Inventories, net	17,212	(53,776)
Prepaid expenses and other	(18,110)	(19,241)
Other assets	941	(2,786)
Accounts payable	(5,663)	1,869
Accrued expenses	(40,270)	(36,779)
Other liabilities	(8,839)	707
Net cash provided by/(used in) operating activities	7,541	(18,856)
Cash flows from investing activities:
Purchases of property and equipment	(10,279)	(19,373)
Proceeds on investment sales	4,076	7,550
Purchases of investments	(3,930)	(6,973)
Net cash used in investing activities	(10,133)	(18,796)
Cash flows from financing activities:
Exercise of employee stock options and taxes paid related to the net shares settlement of stock awards	3,516	(477)
Payment of cash dividends	(19,293)	(19,289)
Repurchases of shares of common stock	(10,006)	(50,406)
Finance lease principal payments	(476)	(483)
Payments of debt	(7,500)	(17,500)
Proceeds from debt	0	70,000
Net cash used in financing activities	(33,759)	(18,155)
Effect of exchange rate changes on cash	(1,026)	(7,777)
Net increase (decrease) in cash and cash equivalents	(37,377)	(63,584)
Cash and cash equivalents, beginning of period	339,593	402,683
Cash and cash equivalents, end of period	$ 302,216	$ 339,099