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	$ 35,830	$ 22,084
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	41,220	33,205
Gain on sale of property and equipment	(457)	(34)
Gain on disposition of equipment centers		(10,091)
Stock-based compensation expense related to stock options and employee stock purchases	4,756	3,583
Provision (benefit) for deferred income tax expense	16,560	1,488
Excess tax benefits from stock-based compensation	(1,244)	(232)
Change in accounts receivable, net	(29,536)	(24,623)
Change in inventories	(161,532)	(68,307)
Change in prepaid expenses and other, net	8,813	98
Change in trade accounts payable	16,513	14,931
Change in accrued expenses	18,580	24,149
Net cash (used in) operating activities	(50,497)	(3,749)
Cash flows from investing activities:
Acquisition of property and equipment	(100,382)	(44,643)
Proceeds from the sale of property and equipment	10,526	221
Business acquisitions	(60,038)	(33,674)
Proceeds from disposition of equipment centers		26,234
Change in other assets	(82)	(985)
Net cash (used in) investing activities	(149,976)	(52,847)
Cash flows from financing activities:
Draws on floor plan notes payable, net	186,347	58,297
Proceeds from long-term debt	86,662	46,262
Principal payments on long-term debt	(52,214)	(41,834)
Principal payments on capital lease obligations	(10,166)	(5,692)
Debt issuance costs	(96)	(160)
Excess tax benefits from stock-based compensation	1,244	232
Proceeds from issuance of shares relating to employee stock options and employee stock purchases	2,965	1,298
Net cash provided by financing activities	214,742	58,403
Net increase in cash and cash equivalents	14,269	1,807
Cash and cash equivalents, beginning of period	168,976	149,095
Cash and cash equivalents, end of period	183,245	150,902
Cash paid during the period for:
Interest	10,573	9,874
Income taxes, net of refunds	(2,709)	3,749
Noncash investing activities:
Note receivable related to disposition of equipment centers		4,750
Assets acquired under capital leases	$ 11,342	$ 8,261