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Commitments and Contingencies - Additional Information (Detail) (USD $) | 0 Months Ended | 3 Months Ended | 9 Months Ended |  |  |  |  | 9 Months Ended |  | 9 Months Ended |  |  | 3 Months Ended | 9 Months Ended | 12 Months Ended |  | 1 Months Ended | 3 Months Ended | 9 Months Ended
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Oct. 09, 2013 | Sep. 30, 2014 Customer | Sep. 30, 2013 Customer | Sep. 30, 2014 Customer | Sep. 30, 2013 Customer | Jul. 31, 2014 | Dec. 31, 2013 Customer | Dec. 31, 2011 | Dec. 31, 2013 Customer One [Member] | Sep. 30, 2013 Customer One [Member] Consolidated Revenues [Member] | Dec. 31, 2013 Other Customer [Member] | Sep. 30, 2014 Sunrise Powerlink Project [Member] | Apr. 21, 2010 Sunrise Powerlink Project [Member] mi | Sep. 30, 2014 Fiber Optic Committed Capital [Member] | Sep. 30, 2014 Vehicle Fleet Committed Capital [Member] | Sep. 30, 2014 Minimum [Member] | Sep. 30, 2014 Minimum [Member] Consolidated Revenues [Member] | Sep. 30, 2013 Minimum [Member] Consolidated Revenues [Member] | Sep. 30, 2014 Minimum [Member] Consolidated Revenues [Member] | Sep. 30, 2013 Minimum [Member] Consolidated Revenues [Member] | Sep. 30, 2014 Minimum [Member] Net Position [Member] | Dec. 31, 2013 Minimum [Member] Net Position [Member] | Sep. 30, 2014 Maximum [Member] | Apr. 30, 2014 National Gas Company of Trinidad and Tobago Arbitration [Member] | Mar. 31, 2014 National Gas Company of Trinidad and Tobago Arbitration [Member] | Sep. 30, 2014 National Gas Company of Trinidad and Tobago Arbitration [Member]
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding capital commitment |  | $ 10,300,000 |  | $ 10,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Rent expense related to operating leases |  | 38,400,000 | 28,500,000 | 115,900,000 | 80,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum guaranteed residual value |  | 387,600,000 |  | 387,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated committed capital remainder of current year |  |  |  |  |  |  |  |  |  |  |  |  |  | 13,800,000 | 5,700,000 |  |  |  |  |  |  |  |  |  |  |
Estimated committed capital expenditures in 2015 |  |  |  |  |  |  |  |  |  |  |  |  |  | 10,200,000 |  |  |  |  |  |  |  |  |  |  |  |
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 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Provision for contract receivable |  | 52,542,000 |  | 52,542,000 |  |  |  |  |  |  |  | 52,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
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 |
Amount of arbitration damages and attorneys fee paid |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 28,300,000 |  |
Written Off of accounts receivable |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10,500,000 |
Selling, general and administrative expenses |  | 200,521,000 | 124,949,000 | 513,292,000 | 357,661,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 38,800,000 | 38,800,000
Percentage of net position |  |  |  |  |  |  |  |  | 15.00% |  | 11.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of customers representing ten percent or more of net position |  |  |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of customers representing ten percent or more of consolidated revenues |  | 0 | 0 | 0 | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Concentration risk percentage |  |  |  |  |  |  |  |  |  | 10.00% |  |  |  |  |  |  | 10.00% | 10.00% | 10.00% | 10.00% | 10.00% | 10.00% |  |  |  |
Employer's liability claims subject to deductible per occurrence |  |  |  | 1,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
General liability insurance claims deductible |  |  |  | 10,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Worker's compensation claims per occurrence |  |  |  | 5,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Auto liability insurance claims deductible |  |  |  | 10,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Employee health care benefit plans subject to deductible per claimant |  |  |  | 375,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gross amount accrued for insurance claims |  | 171,000,000 |  | 171,000,000 |  |  | 161,800,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term insurance claims |  | 131,400,000 |  | 131,400,000 |  |  | 122,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related insurance recoveries/receivables |  | 9,000,000 |  | 9,000,000 |  |  | 9,100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related insurance recoveries/receivables included in prepaid expenses and other current assets |  | 700,000 |  | 700,000 |  |  | 700,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related insurance recoveries/receivables included in other assets net |  | 8,300,000 |  | 8,300,000 |  |  | 8,400,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Letters of credit and bank guarantees under the credit facility |  | 320,200,000 |  | 320,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total amount of outstanding performance bonds |  | 3,500,000,000 |  | 3,500,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated cost to complete bonded projects |  | 694,000,000 |  | 694,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Multi-employer plan withdrawal obligation |  |  |  |  |  | 39,600,000 |  | 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 |  |  |  | 3,400,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash proceeds deposited in Escrow account | $ 2,100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant