Revenue Recognition - Additional Information (Detail)		3 Months Ended
		Mar. 31, 2016 USD ($) Project	Mar. 31, 2015 USD ($)
Revenue Recognition Multiple Deliverable Arrangements [Line Items]
Unapproved change orders		$ 122,000,000	$ 240,000,000
Revenues	[1]	729,032,000	550,463,000
Cost of operations		616,033,000	475,459,000
MEA [Member] | Unconsolidated joint ventures [Member]
Revenue Recognition Multiple Deliverable Arrangements [Line Items]
Revenues		0	0
Cost of operations		0	0
MEA [Member] | Claims Revenue [Member]
Revenue Recognition Multiple Deliverable Arrangements [Line Items]
Revenues		16,000,000	7,000,000
Cost of operations		16,000,000	7,000,000
Backlog [Member]
Revenue Recognition Multiple Deliverable Arrangements [Line Items]
Unapproved change orders		20,000,000	$ 73,000,000
Backlog Related To Active Projects [Member]
Revenue Recognition Multiple Deliverable Arrangements [Line Items]
Loss on contracts		$ 5,000,000
Active Projects [Member]
Revenue Recognition Multiple Deliverable Arrangements [Line Items]
Number of projects accounted under deferred profit recognition policy | Project		1

[1] Intersegment transactions included in revenues were not significant for either of the periods presented.