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Acquisition of Construction Services Businesses - Revised Preliminary Estimated Fair Values of Assets Acquired and Liabilities Assumed (Detail) - USD ($)
$ in Thousands
Jun. 30, 2015
Dec. 31, 2014
Oct. 01, 2014
Business Acquisition [Line Items]      
Goodwill $ 138,257 $ 143,160  
Link-Line, W.S. Nicholls, and Brigadier [Member]      
Business Acquisition [Line Items]      
Cash, cash equivalents, and restricted cash     $ 3,000
Contracts receivable and other receivables     62,000
Property, plant and equipment     17,000
Other assets     15,000
Intangible assets     52,000
Goodwill     131,000
Total assets acquired     280,000
Current liabilities     40,000
Deferred income tax - long-term     17,000
Other long-term liabilities     4,000
Net assets acquired     $ 219,000