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Revenue (Tables)

12 Months Ended

Dec. 31, 2018

Schedule of contract assets

Contract assets consist of the following (in thousands):


		December 31,			December 31,
		2018			2017
Unbilled revenue		$	249,577		$	160,092
Retention receivable			88,953			66,586
Contract materials (not yet installed)			25,715			39,224
		$	364,245		$	265,902

Schedule of contract liabilities

Contract liabilities consist of the following (in thousands):


		December 31,			December 31,
		2018			2017
Deferred revenue		$	182,232		$	159,310
Accrued loss provision			7,307			10,067
		$	189,539		$	169,377

Schedule of revenue disaggregation by various categories

Master Service Agreements (“MSA”) and Non-MSA revenue was as follows (in thousands):


		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			240,228			46,521			286,749
Civil			—			464,972			464,972
Total		$	1,128,562		$	1,810,916		$	2,939,478

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


		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			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.