Goodwill and Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Rollforward of goodwill by reportable segment

	TES		LTL		Ascent		Total
Goodwill	$	92,926	$	—	$	171,900	$	264,826

ScheduleofAccumulatedImpairmentLoss [Table Text Block]

	TES		LTL		Ascent		Total
Accumulated goodwill impairment charges	$	132,408	$	197,312	$	46,763	$	376,483

Intangible assets

	March 31, 2019							December 31, 2018
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Value		Gross Carrying Amount		Accumulated Amortization			Net Carrying Value
TES	$	55,008	$	(24,051	)	$	30,957	$	55,008	$	(22,959	)	$	32,049
LTL	2,498		(1,967		)	531		2,498		(1,925		)	573
Ascent	27,152		(17,861		)	9,291		27,152		(17,248		)	9,904
Total	$	84,658	$	(43,879	)	$	40,779	$	84,658	$	(42,132	)	$	42,526

Estimated amortization expense

Remainder 2019	$	5,072
2020	6,447
2021	6,265
2022	5,826
2023	5,462
Thereafter	11,707
Total	$	40,779