Goodwill and Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2020

Goodwill and Intangible Assets [Abstract]

Changes in Carrying Amount of Goodwill

					Specialty
(in thousands)	Civil			Building	Contractors		Total
Gross goodwill	$	492,074	$	424,724	$	156,193	$	1,072,991
Accumulated impairment		(286,931)		(424,724)		(156,193)		(867,848)
Balance as of December 31, 2019		205,143		—		—		205,143
Current year activity		—		—		—		—
Balance as of March 31, 2020	$	205,143	$	—	$	—	$	205,143

Intangible Assets

	As of March 31, 2020								Weighted
					Accumulated				Average
				Accumulated	Impairment		Carrying		Amortization
(in thousands)	Cost			Amortization	Charge		Value		Period
Trade names (non-amortizable)	$	117,600	$	—	$	(67,190)	$	50,410	Indefinite
Trade names (amortizable)		74,350		(21,889)		(23,232)		29,229	20 years
Contractor license		6,000		—		(6,000)		—	N/A
Customer relationships		39,800		(21,311)		(16,645)		1,844	12 years
Construction contract backlog		149,290		(81,315)		—		67,975	3 years
Total	$	387,040	$	(124,515)	$	(113,067)	$	149,458

	As of December 31, 2019								Weighted
					Accumulated				Average
				Accumulated	Impairment		Carrying		Amortization
(in thousands)	Cost			Amortization	Charge		Value		Period
Trade names (non-amortizable)	$	117,600	$	—	$	(67,190)	$	50,410	Indefinite
Trade names (amortizable)		74,350		(21,267)		(23,232)		29,851	20 years
Contractor license		6,000		—		(6,000)		—	N/A
Customer relationships		39,800		(21,048)		(16,645)		2,107	12 years
Construction contract backlog		149,290		(76,388)		—		72,902	3 years
Total	$	387,040	$	(118,703)	$	(113,067)	$	155,270