Revenue (Tables)

12 Months Ended

Dec. 31, 2019

Revenue

Schedule of contract assets

Contract assets consist of the following (in thousands):

	December 31,
	2019		2018
Unbilled revenue	$	251,429	$	249,577
Retention receivable		81,393		88,953
Contract materials (not yet installed)		11,984		25,715
	$	344,806	$	364,245

Schedule of contract liabilities

Contract liabilities consist of the following (in thousands):

	December 31,
	December 31,		December 31,
	2019		2018
Deferred revenue	$	186,081	$	182,232
Accrued loss provision		6,316		7,307
	$	192,397	$	189,539

Schedule of revenue disaggregation by various categories

MSA and Non-MSA revenue was as follows (in thousands):

	For the year ended December 31, 2019
Segment	MSA		Non-MSA		Total
Power	$	186,504	$	542,844	$	729,348
Pipeline		114,710		390,446		505,156
Utilities		651,028		235,476		886,504
Transmission		401,823		95,479		497,302
Civil		2,477		485,542		488,019
Total	$	1,356,542	$	1,749,787	$	3,106,329

	For the year ended December 31, 2018
Segment	MSA		Non-MSA		Total
Power	$	141,193	$	552,855	$	694,048
Pipeline		47,143		543,794		590,937
Utilities		699,998		202,774		902,772
Transmission (1)		240,228		46,521		286,749
Civil		—		464,972		464,972
Total	$	1,128,562	$	1,810,916	$	2,939,478

(1) Represents results from the June 1, 2018 acquisition date of Willbros to December 31, 2018.

Revenue by contract type was as follows (in thousands):

	For the year ended December 31, 2019
Segment	Fixed-price		Unit-price		Cost reimbursable (1)		Total
Power	$	458,566	$	13,982	$	256,800	$	729,348
Pipeline		60,157		37,963		407,036		505,156
Utilities		117,015		486,496		282,993		886,504
Transmission		57,818		423,371		16,113		497,302
Civil		81,931		327,449		78,639		488,019
Total	$	775,487	$	1,289,261	$	1,041,581	$	3,106,329

(1) Includes time and material and cost reimbursable plus fee contracts.

	For the year ended December 31, 2018
Segment	Fixed-price		Unit-price		Cost reimbursable (1)		Total
Power	$	393,555	$	45,339	$	255,154	$	694,048
Pipeline		107,519		58,651		424,767		590,937
Utilities		184,649		460,122		258,001		902,772
Transmission (2)		48,679		230,077		7,993		286,749
Civil		69,398		345,510		50,064		464,972
Total	$	803,800	$	1,139,699	$	995,979	$	2,939,478

(1) Includes time and material and cost reimbursable plus fee contracts.

(2) Represents results from the June 1, 2018 acquisition date of Willbros to December 31, 2018.