Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Per Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Condensed Consolidated Statements of Operations [Abstract]
Revenues	$ 226,193	$ 163,690	$ 605,622	$ 466,222
Operating expenses:
Purchased transportation costs	165,521	128,629	452,286	363,732
Personnel and related benefits	23,598	15,826	61,656	45,514
Other operating expenses	22,163	10,502	54,501	29,623
Depreciation and amortization	1,499	747	3,381	2,364
Acquisition transaction expenses	618	57	938	389
IPO related expenses				1,500
Total operating expenses	213,399	155,761	572,762	443,122
Operating income	12,794	7,929	32,860	23,100
Interest expense:
Interest on long-term debt	1,172	504	2,056	7,752
Dividends on preferred stock subject to mandatory redemption	50	50	150	150
Total interest expense	1,222	554	2,206	7,902
Loss on early extinguishment of debt				15,916
Income (loss) before provision (benefit) for income taxes	11,572	7,375	30,654	(718)
Provision (benefit) for income taxes	4,397	2,991	11,648	(432)
Net income (loss)	7,175	4,384	19,006	(286)
Accretion of Series B preferred stock				765
Net income (loss) available to common stockholders	$ 7,175	$ 4,384	$ 19,006	$ (1,051)
Earnings (loss) per share available to common stockholders:
Basic	$ 0.23	$ 0.15	$ 0.63	$ (0.04)
Diluted	$ 0.23	$ 0.14	$ 0.60	$ (0.04)
Weighted average common stock outstanding:
Basic	30,562	30,052	30,340	24,316
Diluted	31,758	31,089	31,576	24,316