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Commitments and Contingencies - Additional Information (Detail) (USD $)
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2013
Customer
Sep. 30, 2012
Customer
Mar. 31, 2012
Dec. 31, 2011
Sep. 30, 2013
Customer
Sep. 30, 2012
Customer
Dec. 31, 2012
Customer
Apr. 21, 2010
mi
Loss Contingencies [Line Items]                
Rent expense related to operating leases $ 28,500,000 $ 22,400,000     $ 80,200,000 $ 66,200,000    
Maximum guaranteed residual value 278,400,000       278,400,000      
Estimated committed capital remainder of current year 10,100,000       10,100,000      
Estimated committed capital in 2014 17,700,000       17,700,000      
Related insurance recoveries receivables 12,600,000       12,600,000   22,200,000  
Length of electrical transmission line to be constructed under contract               117
Commencement of arbitration         2013-10-02      
Per annum statutory interest under California law on amounts affirmed in arbitration         10.00%      
Number of customer represent ten percent or more of accounts receivable 2       2   2  
Number of customers representing ten percent or more of consolidated revenues 0 0     0 0    
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      
Gross amount accrued for insurance claims 164,900,000       164,900,000   160,800,000  
Long-term insurance claims 122,900,000       122,900,000   120,200,000  
Related insurance recoveries/receivables included in prepaid expenses and other current assets 800,000       800,000   2,300,000  
Related insurance recoveries receivables included in other assets net 11,800,000       11,800,000   19,900,000  
Letters of credit outstanding issued under credit facility 226,400,000       226,400,000      
Total amount of outstanding performance bonds 2,350,000,000       2,350,000,000      
Estimated cost to complete bonded projects 433,000,000       433,000,000      
Partial withdrawal liability       32,600,000        
Multiemployer Plan Withdrawal Obligation, amount suggested by Plan which is different than amount recorded by company     39,700,000 32,800,000     40,100,000  
Sales [Member] | Minimum [Member]
                
Loss Contingencies [Line Items]                
Concentration risk percentage         10.00%      
Consolidated Net Position [Member] | Minimum [Member]
                
Loss Contingencies [Line Items]                
Concentration risk percentage 10.00%       10.00%   10.00%  
Customer One [Member]
                
Loss Contingencies [Line Items]                
Percentage of net position 13.00%       13.00%   16.00%  
Customer One [Member] | Sales [Member] | Minimum [Member]
                
Loss Contingencies [Line Items]                
Concentration risk percentage         10.00%      
Other Customer [Member]
                
Loss Contingencies [Line Items]                
Percentage of net position 10.00%       10.00%   11.00%  
2013 [Member]
                
Loss Contingencies [Line Items]                
Purchase commitments related to operating equipment and vehicles 9,600,000       9,600,000      
2014 [Member]
                
Loss Contingencies [Line Items]                
Purchase commitments related to operating equipment and vehicles 9,200,000       9,200,000      
National Gas Company of Trinidad and Tobago Arbitration [Member]
                
Loss Contingencies [Line Items]                
Damages Sought by Company in Arbitration, Value         16,500,000      
Loss Contingency, Damages Sought by Customer in Arbitration counterclaim, Value         79,500,000      
Howard Midstream Energy Partners, LLC. [Member]
                
Loss Contingencies [Line Items]                
Outstanding capital commitment to be paid in fourth quarter of 2013 8,300,000       8,300,000      
Unconsolidated Affiliates [Member]
                
Loss Contingencies [Line Items]                
Additional capital commitment to be paid before the end of 2015 13,200,000       13,200,000      
California Wildfire Amador County [Member]
                
Loss Contingencies [Line Items]                
Land damaged due to wildfire, in acres         16,800      
Demand for payment of fire suppression costs 8,500,000       8,500,000      
Liability recorded for fire claims 8,500,000       8,500,000      
Related insurance recoveries receivables 8,500,000       8,500,000      
USDA intends to seek amount for restoration and other damages $ 51,300,000       $ 51,300,000