CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ 37,446	$ 28,749
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization of property, plant and equipment	37,371	33,701
Provision for bad debt expense	248	1,425
Other amortization	325	325
Debt issuance cost amortization	1,250	966
Debt discount amortization, net of premium amortization	150	83
Stock-based compensation expense	5,634	4,743
Deferred income taxes	11,192	8,396
Net distributions from equity investee	35	82
Asset impairment charges	151	16,661
Loss (gain) on disposal of dealerships and property and equipment	(149)	(1,202)
Loss (gain) on exit of leased dealerships	(139)	707
Changes in assets and liabilities that relate to operations:
Receivables	70,389	65,824
Inventories	9,365	(129,446)
Other assets	46,560	(4,163)
Notes payable - floor plan - trade	(106,336)	51,905
Trade accounts payable and other liabilities	(6,773)	(24,422)
Total adjustments	69,273	25,585
Net cash provided by (used in) operating activities	106,719	54,334
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of land, property and equipment	(108,970)	(82,922)
Proceeds from sales of property and equipment	887	775
Proceeds from sales of dealerships		1,250
Net cash provided by (used in) investing activities	(108,083)	(80,897)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net (repayments) borrowings on notes payable - floor plan - non-trade	29,915	(5,217)
Borrowings on revolving credit facilities	155,208	238,672
Repayments on revolving credit facilities	(159,411)	(229,674)
Proceeds from issuance of long-term debt	76,409	46,075
Debt issuance costs	(293)
Principal payments on long-term debt	(9,633)	(9,149)
Purchases of treasury stock	(87,504)	(14,766)
Income tax benefit (expense) associated with stock compensation plans	(364)	416
Issuance of shares under stock compensation plans	6	2,132
Dividends paid	(4,175)	(2,556)
Net cash provided by (used in) financing activities	158	25,933
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	(1,206)	(630)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	3,625	4,182
CASH AND CASH EQUIVALENTS, END OF PERIOD	2,419	3,552
SUPPLEMENTAL SCHEDULE OF NON-CASH FINANCING ACTIVITIES:
Change in fair value of cash flow interest rate swap agreements (net of tax benefit of $2,916 and $19 in the six months ended June 30, 2016 and 2015, respectively)	(4,760)	(31)
Cash paid (received) during the period for:
Interest, including amount capitalized	37,576	35,825
Income taxes	$ 10,875	$ 7,768