Consolidated Statements of Income and Comprehensive Income (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Revenues:
New and used commercial vehicle sales	$ 600,900	$ 489,610
Parts and service sales	308,974	231,479
Lease and rental	40,989	30,140
Finance and insurance	4,076	3,133
Other	3,728	2,426
Total revenue	958,667	756,788
Cost of products sold:
New and used commercial vehicle sales	558,142	452,574
Parts and service sales	198,703	145,713
Lease and rental	35,897	24,713
Total cost of products sold	792,742	623,000
Gross profit	165,925	133,788
Selling, general and administrative	134,445	102,106
Depreciation and amortization	8,818	7,110
Gain on sale of assets	84	41
Operating income	22,746	24,613
Interest expense, net	3,131	2,513
Income before taxes	19,615	22,100
Provision for income taxes	7,601	8,553
Net income	12,014	13,547
Earnings per common share:
Earnings per common share - Basic (in Dollars per share)	$ 0.31	$ 0.35
Earnings per common share - Diluted (in Dollars per share)	$ 0.30	$ 0.34
Weighted average shares outstanding:
Basic (in Shares)	39,332	39,119
Diluted (in Shares)	40,511	40,269
Comprehensive income	$ 12,128	$ 13,718