Segment Reporting (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($) Segment	Mar. 31, 2018 USD ($)	Dec. 31, 2018 USD ($)
Segment Reporting Information [Line Items]
Number of operating segments | Segment	3
Schedule of financial data of reportable segments
Revenues	$ 507,148	$ 569,984
Impairment charges	778	0
Operating Income	(20,776)	(13,430)
Interest expense:	3,882	9,543
Loss on debt restructuring	2,270	0
Income before provision for income taxes	(26,928)	(22,973)
Depreciation and amortization	15,542	9,065
Capital expenditures, cash and non-cash	36,314	5,975
Total assets	982,279		$ 853,457
Operating Segments | TES [Member]
Schedule of financial data of reportable segments
Revenues	274,857	326,067
Impairment charges	0	0
Operating Income	(3,721)	4,400
Depreciation and amortization	11,187	6,296
Capital expenditures, cash and non-cash	6,872	2,997
Total assets	422,432		379,956
Operating Segments | LTL
Schedule of financial data of reportable segments
Revenues	102,823	113,125
Impairment charges	0	0
Operating Income	(5,834)	(8,684)
Depreciation and amortization	638	913
Capital expenditures, cash and non-cash	1,772	200
Total assets	121,364		73,706
Operating Segments | Ascent [Member]
Schedule of financial data of reportable segments
Revenues	131,692	134,943
Impairment charges	0	0
Operating Income	5,372	6,707
Depreciation and amortization	1,682	1,188
Capital expenditures, cash and non-cash	1,837	354
Total assets	304,956		276,994
Eliminations
Schedule of financial data of reportable segments
Revenues	(2,224)	(4,151)
Total assets	(1,008)		(1,120)
Corporate
Schedule of financial data of reportable segments
Impairment charges	778	0
Operating Income	(16,593)	(15,853)
Depreciation and amortization	2,035	668
Capital expenditures, cash and non-cash	25,833	$ 2,424
Total assets	$ 134,535		$ 123,921
Rolling Stock Assets [Member] | TES [Member]
Schedule of financial data of reportable segments
Percent of assets leased	100.00%
Rolling Stock Assets [Member] | Corporate
Schedule of financial data of reportable segments
Capital expenditures, cash and non-cash	$ 22,100