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Long-Term Debt and Capital Lease Obligations - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
 1 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended 12 Months Ended
Mar. 31, 2011
Dec. 31, 2012
Y
Dec. 31, 2013
Sep. 30, 2010
FS Asia Advisory Limited
Dec. 31, 2013
FS Asia Advisory Limited
Dec. 31, 2012
New Revolving Senior Bank Credit Facility
Dec. 31, 2012
Former Credit Facility
Dec. 31, 2013
6 3/4 % Senior Notes Due 2020
Dec. 31, 2013
6 3/4 % Senior Notes Due 2020
Minimum
D
Dec. 31, 2013
6 3/4 % Senior Notes Due 2020
Maximum
D
Dec. 31, 2013
6.0% Senior Notes Due 2022
Dec. 31, 2013
6.0% Senior Notes Due 2022
Minimum
D
Dec. 31, 2013
6.0% Senior Notes Due 2022
Maximum
D
Dec. 31, 2013
Letter of Credit
Dec. 31, 2012
Letter of Credit
Dec. 31, 2013
Unsecured Notes
FS Asia Advisory Limited
Debt Instrument [Line Items]                                
Interest percentage               6.75%     6.00%         8.00%
Debt maturity period               2020     2022          
Senior notes, redemption date                     Nov. 15, 2017          
Number of days prior notice required for redemption of notes                 30 60   30 60      
Debt issue costs               $ 9.8     $ 7.6          
Notes maturity date               Apr. 01, 2011                
Senior secured revolving line of credit   425.0       350.0 250.0                  
Line of credit, maturity date           Nov. 25, 2017                    
Credit facility, Term (Years)   5                            
Line of credit, borrowing limit used                           1.4 1.4  
Notes issued in connection with acquisition 2.9     35.0                        
Repayments of Notes payable         18.0                      
Guarantee obligation by domestic subsidiaries for borrowings under bank credit facility     $ 700.0