Revenue from Customers (Tables)

12 Months Ended

Dec. 31, 2020

Revenue from Contract with Customer [Abstract]

Schedule of Backlog By Segment

The following table presents the Company’s backlog, by segment:

	December 31,
	2020		2019
Heavy Civil Backlog	$	898,183	$	834,049
Specialty Services Backlog	277,205		233,976
Total Heavy Civil and Specialty Services Backlog	$	1,175,388	$	1,068,025

Disaggregation of Revenue

The following tables present the Company’s revenues disaggregated by major end market and contract type:

	Years Ended December 31,
Revenues by major end market	2020		2019		2018
Heavy Highway	$	526,561	$	483,175	$	513,376
Aviation	109,894		141,371		111,824
Water Containment and Treatment	69,922		65,795		66,928
Other	47,447		69,984		73,510
Heavy Civil Revenues	753,824		760,325		765,638
Land Development	397,253		84,637		—
Commercial	111,641		128,187		120,333
Specialty Services Revenues	508,894		212,824		120,333
Residential Revenues	164,694		153,129		151,696
Total Revenues	$	1,427,412	$	1,126,278	$	1,037,667
Revenues by contract type
Fixed-Unit Price	$	843,401	$	708,638	$	733,047
Lump Sum	389,045		262,237		146,874
Residential and Other	194,966		155,403		157,746
Total Revenues	$	1,427,412	$	1,126,278	$	1,037,667