Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Cash Flows from Operations
Net Income	$ 81,891	$ 42,293	$ 37,442
Adjustments to reconcile net income to cash provided by operations:
Depreciation and amortization	33,140	39,725	39,352
Deferred income taxes	424	10,627	941
Net losses (gains) on disposal of property	140	(1,177)	(524)
Losses on impairment of property	312	0	576
Net income attributable to noncontrolling interests	(466)	(295)	(165)
Changes in assets and liabilities:
Trade receivables	(119,505)	(100,812)	82,378
Merchandise inventory	(5,774)	(80,728)	64,191
Other current assets	(7,616)	11,462	3,520
Other non-current assets	(33,547)	(2,429)	(1,397)
Trade accounts payable	93,649	69,076	(60,218)
Accrued payroll and benefit costs	22,454	28,572	(53,645)
Other current liabilities	(3,520)	(11,662)	13,529
Other non-current liabilities	33,326	(14,892)	(11,615)
Total adjustments to net income	13,017	(52,533)	76,923
Net cash provided (used) by operations	94,908	(10,240)	114,365
Cash Flows from Investing Activities
Proceeds from disposal of property	296	3,880	1,633
Capital expenditures for property	(62,162)	(33,624)	(27,263)
Investment in affiliated company	870	624	618
Net cash used by investing activities	(60,996)	(29,120)	(25,012)
Cash Flows from Financing Activities
Net increase (decrease) in short-term borrowings	22,867	4,463	(5,217)
Repayment of long-term debt	(43,864)	(32,160)	(32,085)
Proceeds from long-term debt	0	8,528	0
Principal payments under capital leases	(3,306)	(1,968)	(801)
Sales of common stock	11,121	9,799	11,392
Purchases of treasury stock	(9,264)	(10,448)	(11,901)
Sales of noncontrolling interests' common stock	512	0	464
Purchases of noncontrolling interests' common stock	(109)	(151)	(109)
Dividends paid	(22,258)	(20,211)	(17,675)
Net cash used by financing activities	(44,301)	(42,148)	(55,932)
Net (Decrease) Increase in Cash	(10,389)	(81,508)	33,421
Cash, Beginning of Year	82,356	163,864	130,443
Cash, End of Year	71,967	82,356	163,864
Non-cash Investing and Financing Activities
Acquisition of equipment under capital leases	2,332	5,009	2,792
Interest, net of amounts capitalized	10,880	8,562	10,470
Income taxes, net of refunds	$ 55,136	$ 15,037	$ 19,965