Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Statement of Cash Flows [Abstract]
Net income	$ 45,362	$ 54,970
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	27,756	24,905
Share-based compensation expense	4,190	3,449
Provision for losses on accounts and notes receivable	334	315
Deferred income tax (benefit) expense	(5,151)	5,777
Changes in operating assets and liabilities:
Accounts and notes receivable	28,477	1,789
Merchandise inventories	(48,575)	(31,176)
Accounts payable	54,922	191,406
Net change in other assets and liabilities	(32,765)	(69,462)
Other, net	(1,078)	(2,794)
Cash provided by operating activities	73,472	179,179
Investing activities:
Additions to property and equipment	(25,657)	(16,221)
Additions to computer software and intangible assets	(13,166)	(14,826)
Proceeds from sale of investment	1,937	0
Proceeds from sale of property and equipment	45	68
Cash used for investing activities	(36,841)	(30,979)
Financing activities:
Cash dividends paid	(31,564)	(30,411)
Repurchases of common stock	(9,448)	(8,297)
Excess tax benefits related to share-based compensation	444	550
Proceeds from exercise of stock options	1,180	4,195
Purchase of noncontrolling interest	(1,500)	0
Other, net	(4,441)	(5,167)
Cash used for financing activities	(45,329)	(39,130)
Effect of exchange rate changes on cash and cash equivalents	(1,180)	868
Net increase (decrease) in cash and cash equivalents	(9,878)	109,938
Cash and cash equivalents at beginning of period	101,905	97,888
Cash and cash equivalents at end of period	92,027	207,826
Supplemental disclosure of cash flow information:
Income taxes paid, net	40,680	40,364
Interest paid	$ 7,402	$ 7,691