Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Cash Flows from Operations
Net Income	$ 86,598	$ 81,891	$ 42,293
Adjustments to reconcile net income to cash provided by operations:
Depreciation and amortization	32,449	33,140	39,725
Deferred income taxes	9,877	424	10,627
Net (gains) losses on disposal of property	(30,638)	140	(1,177)
Losses on impairment of property	1,066	312	0
Net income attributable to noncontrolling interests	(307)	(466)	(295)
Changes in assets and liabilities:
Trade receivables	33,587	(119,505)	(100,812)
Merchandise inventory	(20,629)	(5,774)	(80,728)
Other current assets	(4,108)	(7,616)	11,462
Other non-current assets	4,115	(33,547)	(2,429)
Trade accounts payable	(58,136)	93,649	69,076
Accrued payroll and benefit costs	(8,715)	22,454	28,572
Other current liabilities	7,855	(3,520)	(11,662)
Other non-current liabilities	6,843	33,326	(14,892)
Total adjustments to net income	(26,741)	13,017	(52,533)
Net cash provided (used) by operations	59,857	94,908	(10,240)
Cash Flows from Investing Activities
Proceeds from disposal of property	34,079	296	3,880
Capital expenditures for property	(61,362)	(62,162)	(33,624)
Investment in affiliated company	478	870	624
Net cash used by investing activities	(26,805)	(60,996)	(29,120)
Cash Flows from Financing Activities
Net increase in short-term borrowings	28,554	22,867	4,463
Repayment of long-term debt	(38,851)	(43,864)	(32,160)
Proceeds from long-term debt	0	0	8,528
Principal payments under capital leases	(2,960)	(3,306)	(1,968)
Sales of common stock	11,925	11,121	9,799
Purchases of treasury stock	(11,172)	(9,264)	(10,448)
Sales of noncontrolling interests' common stock	0	512	0
Purchases of noncontrolling interests' common stock	(2,863)	(109)	(151)
Dividends paid	(51,978)	(22,258)	(20,211)
Net cash used by financing activities	(67,345)	(44,301)	(42,148)
Net Decrease in Cash	(34,293)	(10,389)	(81,508)
Cash, Beginning of Year	71,967	82,356	163,864
Cash, End of Period	37,674	71,967	82,356
Non-cash Investing and Financing Activities
Acquisitions of equipment under capital leases	1,971	2,332	5,009
Interest, net of amounts capitalized	2,376	10,880	8,562
Income taxes, net of refunds	$ 58,018	$ 55,136	$ 15,037