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Long-Term Debt and Capital Lease Obligations - Additional Information (Detail) - USD ($)
3 Months Ended 12 Months Ended
Sep. 23, 2015
Aug. 28, 2015
Aug. 19, 2015
Aug. 14, 2015
Sep. 30, 2015
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2010
Dec. 31, 2013
Debt Instrument [Line Items]                  
Debt issue costs included in other assets           $ 5,228,000 $ 11,596,000    
Loss on early extinguishment of debt         $ (19,589,000) (19,589,000)      
Guarantee obligation by domestic subsidiaries for borrowings under bank credit facility           500,000,000      
FS Asia Advisory Limited                  
Debt Instrument [Line Items]                  
Notes issued in connection with acquisition               $ 35,000,000  
Repayments of Notes payable     $ 11,000,000            
Senior Bank Credit Facility                  
Debt Instrument [Line Items]                  
Debt issue costs included in other assets           $ 5,500,000 $ 2,800,000   $ 3,700,000
Borrowing interest rate description           The applicable margin will fluctuate between 1.375% per annum and 2.00% per annum, in the case of LIBOR borrowings, or between 0.375% per annum and 1.00% per annum, in the case of base rate borrowings, in each case, based upon the Company’s Consolidated Total Leverage Ratio (as defined in the 2015 Credit Agreement) at such time.      
Senior secured revolving line of credit           $ 100,000,000      
Leverage ratio           350.00%      
Credit facility           $ 200,000,000      
Letters of Credit Outstanding, Amount           $ 1,400,000      
2015 Credit Facility                  
Debt Instrument [Line Items]                  
Line of credit, maturity date           Sep. 26, 2020      
Senior secured revolving line of credit           $ 550,000,000      
Former Credit Facility                  
Debt Instrument [Line Items]                  
Senior secured revolving line of credit           $ 350,000,000      
Minimum | Senior Bank Credit Facility                  
Debt Instrument [Line Items]                  
Line of credit, commitment fees on unused borrowing capacity           0.25%      
Line of credit, fronting fees           1.375%      
Minimum | Senior Bank Credit Facility | London Interbank Offered Rate (LIBOR)                  
Debt Instrument [Line Items]                  
Revolving Credit Facility, percentage points added to the reference rate           1.375%      
Minimum | Senior Bank Credit Facility | Base Rate                  
Debt Instrument [Line Items]                  
Revolving Credit Facility, percentage points added to the reference rate           0.375%      
Maximum | Senior Bank Credit Facility                  
Debt Instrument [Line Items]                  
Line of credit, commitment fees on unused borrowing capacity           0.35%      
Line of credit, fronting fees           2.00%      
Maximum | Senior Bank Credit Facility | London Interbank Offered Rate (LIBOR)                  
Debt Instrument [Line Items]                  
Revolving Credit Facility, percentage points added to the reference rate           2.00%      
Maximum | Senior Bank Credit Facility | Base Rate                  
Debt Instrument [Line Items]                  
Revolving Credit Facility, percentage points added to the reference rate           1.00%      
6.0% Senior Notes Due 2022                  
Debt Instrument [Line Items]                  
Interest percentage           6.00% 6.00%    
Debt maturity period           2022 2022    
Debt redemption period start date           Nov. 15, 2022      
Redemption price percentage           100.00%      
Debt issue costs           $ 7,600,000      
6.0% Senior Notes Due 2022 | Minimum                  
Debt Instrument [Line Items]                  
Number of days prior notice required for redemption of notes           30 days      
6.0% Senior Notes Due 2022 | Maximum                  
Debt Instrument [Line Items]                  
Number of days prior notice required for redemption of notes           60 days      
6 3/4 % Senior Notes Due 2020                  
Debt Instrument [Line Items]                  
Interest percentage         6.75% 6.75% 6.75%    
Debt maturity period         2020 2020 2020    
Debt redemption period start date Sep. 01, 2015                
Debt redemption price for each $1000 principal amount       $ 1,037.88          
Debt aggregate principal amount       $ 1,000          
Debt maturity date       Aug. 27, 2015          
Repayment of debt   $ 192,900,000              
Debt redemption amount $ 207,100,000                
Debt redemption period end date Oct. 01, 2015                
Loss on early extinguishment of debt           $ (19,600,000)      
Write-off of unamortized deferred financing costs           4,900,000      
Redemption premium           $ 14,300,000      
6 3/4 % Senior Notes Due 2020 | Tender Offer                  
Debt Instrument [Line Items]                  
Debt redemption price for each $1000 principal amount       $ 1,033.75          
Debt aggregate principal amount       $ 1,000