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Commitments and Contingencies - Additional Information (Detail) (USD $)
 0 Months Ended 3 Months Ended 3 Months Ended 3 Months Ended 3 Months Ended 3 Months Ended
Oct. 09, 2013
Mar. 31, 2014
Customer
Mar. 31, 2013
Customer
Dec. 31, 2013
Customer
Dec. 31, 2011
Mar. 31, 2014
Minimum [Member]
Mar. 31, 2014
Maximum [Member]
Mar. 31, 2014
Consolidated Revenues [Member]
Minimum [Member]
Mar. 31, 2013
Consolidated Revenues [Member]
Minimum [Member]
Mar. 31, 2014
Consolidated Net Position [Member]
Minimum [Member]
Mar. 31, 2013
Consolidated Net Position [Member]
Minimum [Member]
Mar. 31, 2014
Customer One [Member]
Dec. 31, 2013
Customer One [Member]
Mar. 31, 2013
Customer One [Member]
Consolidated Revenues [Member]
Mar. 31, 2014
Other Customer [Member]
Dec. 31, 2013
Other Customer [Member]
Mar. 31, 2014
2014 [Member]
Mar. 31, 2014
Sunrise Powerlink Project [Member]
Apr. 21, 2010
Sunrise Powerlink Project [Member]
mi
Mar. 31, 2014
National Gas Company of Trinidad and Tobago Arbitration [Member]
Loss Contingencies [Line Items]                                        
Outstanding capital commitment   $ 13,100,000                                    
Commitment in next twelve months   500,000                                    
Rent expense related to operating leases   34,800,000 24,300,000                                  
Maximum guaranteed residual value   329,500,000                                    
Estimated committed capital remainder of current year   29,900,000                                    
Estimated committed capital expenditures in 2015   400,000                                    
Purchase commitments related to operating equipment and vehicles                                 18,100,000      
Damages sought by Company in arbitration, value                                       16,500,000
Loss contingency, damages sought by customer in arbitration counterclaim, value                                       79,500,000
Arbitration Damages Liability                                       17,300,000
Interest Payable On Arbitration Damages And Related Attorney Fees Payable                                       11,000,000
Written Off of accounts receivable                                       10,500,000
Selling, general and administrative expenses   173,331,000 113,681,000                                 38,800,000
Length of electrical transmission line to be constructed under contract                                     117  
Claim for breach of contract                                   165,000,000    
Counterclaim for alleged untimely performance and breach of contract                                   32,000,000    
Percentage of net position                       13.00% 15.00%   10.00% 11.00%        
Number of customer represent ten percent or more of accounts receivable   2   2                                
Number of customers representing ten percent or more of consolidated revenues   0 1                                  
Concentration risk percentage               10.00% 10.00% 10.00% 10.00%     14.00%            
Employer's liability claims subject to deductible per occurrence   1,000,000 1,000,000                                  
General liability insurance claims deductible   10,000,000 5,000,000                                  
Worker's compensation claims per occurrence   5,000,000 5,000,000                                  
Auto liability insurance claims deductible   10,000,000 5,000,000                                  
Employee health care benefit plans subject to deductible per claimant   375,000 375,000                                  
Gross amount accrued for insurance claims   163,100,000   161,800,000                                
Long-term insurance claims   122,000,000   122,600,000                                
Related insurance recoveries/receivables   9,300,000   9,100,000                                
Related insurance recoveries/receivables included in prepaid expenses and other current assets   700,000   700,000                                
Related insurance recoveries/receivables included in other assets net   8,600,000   8,400,000                                
Letters of credit outstanding issued under credit facility   213,500,000                                    
Total amount of outstanding performance bonds   2,500,000,000                                    
Estimated cost to complete bonded projects   717,200,000                                    
Multi-employer plan withdrawal obligation         32,600,000 40,100,000 55,400,000                          
Multi-employer Plan Withdrawal Obligation, amount suggested by Plan which is different than amount recorded by company 6,900,000                                      
Multi-employer plan withdrawal obligation complete withdrawal 4,800,000                                      
Multi-employer plan withdrawal obligation accrued   4,100,000                                    
Cash proceeds deposited in Escrow account $ 2,100,000