Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Cash flows from operating activities:
Net income	$ 40,094	$ 9,340
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Asset impairments	872	14,751
Stock-based compensation	1,686	1,450
Gain on disposal of other assets	(134)	(59)
(Gain) loss from disposal activities within discontinued operations	(116)	294
Deferred income taxes	3,325	(2,610)
Excess tax benefit from share-based payment arrangements	(360)	(89)
(Increase) decrease, net of effects from acquisitions and divestitures:
Accounts receivable, net	(7,177)	(17,754)
Inventories	(53,389)	(57,040)
Other current assets	(1,078)	2,564
Other non-current assets	(4,079)	(1,313)
Increase (decrease), net of effects from acquisitions and divestitures:
Floor plan notes payable	(10,637)	3,111
Trade payables	3,759	6,167
Accrued liabilities	9,890	11,181
Other long-term liabilities and deferred revenue	8,018	623
Net cash provided by (used in) operating activities	3,427	(15,987)
Cash flows from investing activities:
Principal payments received on notes receivable	97	62
Capital expenditures	(22,996)	(3,689)
Proceeds from sales of assets	11,217	9,879
Payments for life insurance policies, net of proceeds received	(900)
Cash paid for acquisitions, net of cash acquired	(58,420)	(23,691)
Proceeds from sales of stores	6,517	941
Net cash used in investing activities	(64,485)	(16,498)
Cash flows from financing activities:
Net borrowings on floor plan notes payable: non-trade	67,402	13,807
Borrowings on line of credit	38,000	40,000
Repayments on lines of credit	(9,000)	(24,000)
Proceeds from issuance of long-term debt	22,674	44,120
Proceeds from issuance of common stock	2,848	2,155
Repurchase of common stock	(11,436)	(819)
Excess tax benefit from share-based payment arrangements	360	89
Dividends paid	(5,006)	(2,607)
Increase in restricted cash	(3,300)
Net cash provided by financing activities	67,688	35,010
Increase in cash and cash equivalents	6,630	2,525
Cash and cash equivalents at beginning of period	9,306	12,776
Cash and cash equivalents at end of period	15,936	15,301
Supplemental disclosure of cash flow information:
Cash paid during the period for interest	18,485	19,008
Cash paid during the period for income taxes, net	20,210	3,215
Scheduled Payments [Member]
Cash flows from financing activities:
Principal payments on long-term debt and capital leases	(6,175)	(3,192)
Other Payments [Member]
Cash flows from financing activities:
Principal payments on long-term debt and capital leases	(28,679)	(34,543)
Segment, Continuing Operations [Member]
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	12,593	13,221
Segment, Discontinued Operations [Member]
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	$ 160	$ 176