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Summary of Significant Accounting Policies - Additional Information (Detail)
 3 Months Ended 12 Months Ended
Dec. 06, 2013
USD ($)
Dec. 31, 2015
USD ($)
Reporting_Unit
Dec. 31, 2015
USD ($)
shares
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Dec. 31, 2012
USD ($)
Summary Of Significant Accounting Policies [Line Items]            
Cash and cash equivalents   $ 128,771,000 $ 128,771,000 $ 190,515,000 $ 488,777,000 $ 394,701,000
Cash equivalents   1,400,000 $ 1,400,000 $ 107,600,000    
Number of days after accounts receivable are treated as delinquent     30 days 30 days    
Number of days related to outstanding accounts receivable for analysis of the allowance for doubtful accounts     At least 90 days      
Allowances for doubtful accounts on current receivable   5,226,000 $ 5,226,000 $ 6,174,000    
Current retainage balances   250,100,000 250,100,000 307,300,000    
Non-current retainage balances   4,500,000 4,500,000 19,600,000    
Unbilled receivables   233,600,000 233,600,000 163,100,000    
Depreciation expense related to property and equipment     162,845,000 141,106,000 118,830,000  
Accrued capital expenditures     5,800,000 11,800,000    
Property and equipment impairment   6,600,000   0 0  
Debt issuance costs related to amendment     3,795,000   3,244,000  
Capitalized debt issuance costs   11,400,000 11,400,000 7,600,000    
Accumulated amortization of debt issuance costs   4,800,000 4,800,000 3,500,000    
Amortization expense related to capitalized debt issuance costs     1,251,000 1,094,000 1,081,000  
Non-cash charge for impairment of goodwill   $ 39,800,000 $ 39,826,000      
Decrease in fair value of reporting units considered for impairment calculation   10.00% 10.00%      
Intangible asset impairment charges   $ 12,100,000        
Number of reporting units impacted impairment charge | Reporting_Unit   2        
Change orders and/or claims   $ 137,200,000 $ 137,200,000 106,800,000    
Total amount of unrecognized tax benefits relating to uncertain tax positions   54,541,000 54,541,000 50,668,000 48,306,000 50,555,000
Amount of unrecognized tax benefits change from year end relating to uncertain tax positions     3,900,000      
Unrecognized tax benefits increase resulting from current period tax positions     5,340,000 9,133,000 8,984,000  
Unrecognized tax benefits decrease resulting from settlements with taxing authorities     1,345,000      
General liability insurance claims deductible     10,000,000     5,000,000
Auto liability insurance claims deductible     10,000,000     5,000,000
Worker's compensation claims per occurrence     5,000,000     5,000,000
Employer's liability claims subject to deductible per occurrence     1,000,000     $ 1,000,000
Employee health care benefit plans subject to deductible per claimant     $ 375,000      
Howard Midstream Energy Partners, LLC [Member]            
Summary Of Significant Accounting Policies [Line Items]            
Proceeds from sale of equity ownership interest $ 220,900,000          
Gain on sale of equity ownership interest, Pre tax $ 112,700,000          
Equity ownership percentage held 31.00%          
Restricted Stock Units to be Settled in Cash [Member]            
Summary Of Significant Accounting Policies [Line Items]            
Number of common stock shares that may be received by RSU holder | shares     1      
Investments in Joint Ventures [Member]            
Summary Of Significant Accounting Policies [Line Items]            
Cash and cash equivalents   24,900,000 $ 24,900,000 19,100,000    
Domestic Joint Ventures [Member]            
Summary Of Significant Accounting Policies [Line Items]            
Cash and cash equivalents   11,900,000 $ 11,900,000 19,100,000    
Tax Year 2010 [Member]            
Summary Of Significant Accounting Policies [Line Items]            
Income Tax Examination, Year under Examination     2010      
Tax Year 2011 [Member]            
Summary Of Significant Accounting Policies [Line Items]            
Income Tax Examination, Year under Examination     2011      
Tax Year 2012 [Member]            
Summary Of Significant Accounting Policies [Line Items]            
Income Tax Examination, Year under Examination     2012      
Domestic Bank Accounts [Member]            
Summary Of Significant Accounting Policies [Line Items]            
Cash and cash equivalents   16,100,000 $ 16,100,000 127,200,000    
Foreign Bank Accounts [Member]            
Summary Of Significant Accounting Policies [Line Items]            
Cash and cash equivalents   $ 112,700,000 $ 112,700,000 63,300,000    
Minimum [Member]            
Summary Of Significant Accounting Policies [Line Items]            
Equity method investment ownership   20.00% 20.00%      
Annual growth rates by reporting units     (28.00%)      
Reasonably possible reduction to the balance of unrecognized tax benefits in succeeding 12 months   $ 0 $ 0 $ 0 0  
Maximum [Member]            
Summary Of Significant Accounting Policies [Line Items]            
Equity method investment ownership   50.00% 50.00%      
Annual growth rates by reporting units     54.00%      
Percent change in contract estimates impact on operating results is less than this percentage     5.00% 5.00%    
Reasonably possible reduction to the balance of unrecognized tax benefits in succeeding 12 months   $ 27,485,000 $ 27,485,000 $ 10,221,000 $ 6,554,000