Segment Reporting (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2017 USD ($) Segment	Mar. 31, 2016 USD ($)	Dec. 31, 2016 USD ($)
Segment Reporting Information [Line Items]
Number of operating segments | Segment	3
Number of operating segments realigned | Segment	2
Schedule of financial data of reportable segments
Revenues	$ 478,920	$ 466,546
Operating Income	(17,910)	7,076
Interest expense	6,525	5,608
Income before provision for income taxes	(24,435)	1,468
Depreciation and amortization	9,305	9,209
Capital expenditures, cash and non-cash	3,930	6,047
Total assets	899,807		$ 933,554
Operating Segments | TL
Schedule of financial data of reportable segments
Revenues	283,847	273,344
Operating Income	(233)	3,798
Depreciation and amortization	6,667	6,742
Capital expenditures, cash and non-cash	3,409	3,138
Total assets	449,031		498,330
Operating Segments | LTL
Schedule of financial data of reportable segments
Revenues	108,776	114,353
Operating Income	(2,721)	1,745
Depreciation and amortization	961	869
Capital expenditures, cash and non-cash	244	1,111
Total assets	87,151		129,899
Operating Segments | Ascent
Schedule of financial data of reportable segments
Revenues	88,383	83,378
Operating Income	6,316	7,404
Depreciation and amortization	1,265	1,222
Capital expenditures, cash and non-cash	217	1,689
Total assets	289,340		302,164
Eliminations
Schedule of financial data of reportable segments
Revenues	(2,086)	(4,529)
Total assets	(956)		(1,028)
Corporate
Schedule of financial data of reportable segments
Operating Income	(21,272)	(5,871)
Depreciation and amortization	412	376
Capital expenditures, cash and non-cash	60	$ 109
Total assets	$ 75,241		$ 4,189