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Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)
 3 Months Ended 12 Months Ended
Mar. 31, 2014
Dec. 31, 2013
Mar. 31, 2013
Dec. 31, 2013
Dec. 31, 2012
Summary Of Significant Accounting Policies [Line Items]          
Cash and cash equivalents $ 273,340,000 $ 488,777,000 $ 366,619,000 $ 488,777,000 $ 394,701,000
Cash equivalents 66,500,000 247,800,000   247,800,000  
Cash and cash equivalents held in domestic bank accounts 134,100,000 236,700,000   236,700,000  
Cash and cash equivalents held in foreign bank accounts 139,200,000 252,100,000   252,100,000  
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 At least 90 days      
Total allowances for doubtful accounts 5,186,000 5,215,000   5,215,000  
Current retainage balances 194,600,000 194,500,000   194,500,000  
Non-current retainage balances 55,600,000 50,800,000   50,800,000  
Unbilled receivables 211,900,000 179,200,000   179,200,000  
Decrease in fair value of reporting units considered, for impairment calculation   10.00%   10.00%  
Percent change in contract estimates impact on operating results is less than this percentage 5.00%        
Change orders and/or claims 247,200,000 241,800,000   241,800,000  
Fiber Optic Licensing Terms, Minimum in years 5 years   5 years 5 years  
Fiber Optic Licensing Terms, Maximum in years 25 years   25 years 25 years  
Fiber optic deferred revenue 49,700,000 48,800,000   48,800,000  
Fiber optic non-current deferred revenue 41,600,000 40,200,000   40,200,000  
Total amount of unrecognized tax benefits relating to uncertain tax positions 51,200,000        
Amount of unrecognized tax benefits change from year-end relating to uncertain tax positions 2,400,000        
Reasonably possible reduction to the balance of unrecognized tax benefits in succeeding 12 months upper bound 11,000,000        
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 1        
Sunrise Powerlink Project [Member]
          
Summary Of Significant Accounting Policies [Line Items]          
Revenue associated with change order $ 165,000,000        
Minimum [Member]
          
Summary Of Significant Accounting Policies [Line Items]          
Equity Method Investment ownership 20.00%        
Minimum [Member] | Restricted Stock Units to be Settled in Cash [Member]
          
Summary Of Significant Accounting Policies [Line Items]          
Vesting period for restricted stock units to be settled in cash 2 years        
Maximum [Member]
          
Summary Of Significant Accounting Policies [Line Items]          
Equity Method Investment ownership 50.00%        
Maximum [Member] | Restricted Stock Units to be Settled in Cash [Member]
          
Summary Of Significant Accounting Policies [Line Items]          
Vesting period for restricted stock units to be settled in cash 3 years