Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Operating activities:
Net income	$ 26,098	$ 29,360
Adjustments to reconcile net income to cash provided by operating activities
Depreciation and amortization	12,629	8,578
Share-based compensation expense	1,910	2,385
Provision for losses on accounts and notes receivable	107	190
Deferred income tax benefit	(56)	(1,465)
Changes in operating assets and liabilities:
Accounts and notes receivable	(34,575)	7,553
Merchandise inventories	21,784	82,160
Accounts payable	98,198	(38,279)
Net change in other assets and liabilities	28,981	11,609
Other, net	(465)	(194)
Cash provided by operating activities	154,611	101,897
Investing activities:
Additions to property and equipment	(7,513)	(4,536)
Additions to computer software and intangible assets	(7,264)	(3,840)
Proceeds from sale of property and equipment	44	99
Cash used for investing activities	(14,733)	(8,277)
Financing activities:
Cash dividends paid	(15,199)	(14,001)
Repurchases of common stock	(2,282)	(3,750)
Excess tax benefits related to share-based compensation	207	690
Proceeds from exercise of stock options	1,792	3,371
Other, net	(1,958)	(1,941)
Cash used for financing activities	(17,440)	(15,631)
Effect of exchange rate changes on cash and cash equivalents	(1,763)
Net increase (decrease) in cash and cash equivalents	120,675	77,989
Cash and cash equivalents at beginning of period	97,888	135,938
Cash and cash equivalents at end of period	218,563	213,927
Supplemental disclosure of cash flow information:
Income taxes paid, net	1,540	1,201
Interest paid	$ 698	$ 541