Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015
Income Statement [Abstract]
Revenues	[1]	$ 466,546	$ 488,834
Operating expenses:
Purchased transportation costs	[1]	308,039	327,377
Personnel and related benefits	[1]	68,349	62,964
Other operating expenses	[1]	73,873	71,212
Depreciation and amortization	[1]	9,209	6,807
Total operating expenses	[1]	459,470	468,360
Operating income	[1]	7,076	20,474
Interest expense	[1]	5,608	4,609
Income before provision for income taxes	[1]	1,468	15,865
Provision for income taxes	[1]	568	6,045
Net income	[1],[2]	$ 900	$ 9,820
Earnings per share:
Basic (in dollars per share)	[1]	$ 0.02	$ 0.26
Diluted (in dollars per share)	[1]	$ 0.02	$ 0.25
Weighted average common stock outstanding:
Basic (in shares)	[1]	38,284	38,011
Diluted (in shares)	[1]	38,372	39,324

[1] See Note 13 “Restatement of Previously Issued Financial Statements

[2] See Note 13 “Restatement of Previously Issued Financial Statements.”