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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
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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 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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