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Long-Term Debt and Capital Lease Obligations - Additional Information (Detail) (USD $)
 3 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended 12 Months Ended 1 Months Ended 1 Months Ended 1 Months Ended 12 Months Ended
Dec. 31, 2012
Dec. 31, 2012
Y
Dec. 31, 2011
Dec. 31, 2010
Mar. 31, 2011
Dec. 31, 2011
FD International (Holdings) Limited
Dec. 31, 2012
FS Asia Advisory Limited
Sep. 30, 2010
FS Asia Advisory Limited
Dec. 31, 2012
New Revolving Senior Bank Credit Facility
Dec. 31, 2012
Former Credit Facility
Dec. 31, 2012
6 3/4 % Senior Notes Due 2020
Dec. 31, 2012
6 3/4 % Senior Notes Due 2020
Minimum
D
Dec. 31, 2012
6 3/4 % Senior Notes Due 2020
Maximum
D
Nov. 01, 2010
7 5/8 % Senior Notes Due 2013
Sep. 14, 2010
7 5/8 % Senior Notes Due 2013
Dec. 31, 2009
7 5/8 % Senior Notes Due 2013
Aug. 31, 2005
7 5/8 % Senior Notes Due 2013
Dec. 31, 2012
3 3/4% Senior Subordinated Convertible Notes Due 2012
Dec. 31, 2011
3 3/4% Senior Subordinated Convertible Notes Due 2012
Nov. 27, 2012
6.0% Senior Notes Due 2022
Dec. 31, 2012
6.0% Senior Notes Due 2022
Nov. 27, 2012
6.0% Senior Notes Due 2022
Minimum
D
Nov. 27, 2012
6.0% Senior Notes Due 2022
Maximum
D
Nov. 27, 2012
6.0% Senior Notes Due 2022
First Installment
Nov. 27, 2012
6.0% Senior Notes Due 2022
Second Installment
Dec. 27, 2012
7 3/4 % Senior Notes Due 2016
Nov. 27, 2012
7 3/4 % Senior Notes Due 2016
Nov. 12, 2012
7 3/4 % Senior Notes Due 2016
Dec. 31, 2012
7 3/4 % Senior Notes Due 2016
Dec. 31, 2012
Letter of Credit
Dec. 31, 2011
Letter of Credit
Dec. 31, 2012
Unsecured Notes
FS Asia Advisory Limited
Debt Instrument [Line Items]                                                                
Aggregate principal amount senior note issued $ 723,000,000 $ 723,000,000                             $ 200,000,000   $ 149,900,000 $ 300,000,000                        
Percentage of principal amount of notes received and accepted                                       100.00%                        
Interest percentage                     6.75%           7.625% 3.75%   6.00% 6.00%               7.75%     8.00%
Debt maturity period                     2020           2013 2012   2022 2022               2016      
Net proceeds from issuance of senior notes                             185,800,000         292,600,000           86,700,000 128,300,000          
Net proceeds used to repay outstanding principal and accrued interest   75,000,000 25,000,000 20,000,000                               75,300,000                        
Senior notes, semi-annual interest payment date                                               --11-15 --05-15              
Senior notes, commencement date of interest payment                                       May 15, 2013                        
Notes maturity date                     Apr. 01, 2011             Jul. 15, 2012   Nov. 15, 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                     9,800,000                 7,400,000                        
Price per principal amount of notes for cash tender offer for outstanding senior notes                             $ 1,021.56                         $ 1,029.58        
Principal amount for cash tender price                             1,000                         1,000        
Tender offer consideration in a cash tender offer                             $ 1,001.56                         $ 1,019.58        
Senior notes issued, tender offer amount                                                     133,700,000          
Net proceeds used to repay outstanding principal and accrued interest                                                     1,600,000          
Redemption price percentage                           101.906%                       102.583%            
Loss on early extinguishment of debt (4,850,000) (4,850,000)   (5,161,000)                                                 (4,600,000)      
Aggregate notional amount on interest rate swap         215,000,000                       60,000,000                              
Gain on termination                               2,300,000                                
Effective interest rate                               6.50%   7.625%                            
Consent payment for tender offer                             20.00                                  
Senior notes issued, principal amount     149,940,000                     14,200,000                                    
Repayment of outstanding convertible notes                                   151,300,000                            
Accrued interest on convertible notes                                   2,800,000                            
Senior secured revolving line of credit 425,000,000 425,000,000             350,000,000 250,000,000                                            
Line of credit, maturity date                 Nov. 25, 2017                                              
Credit facility, Term (Years)   5                                                            
Line of credit, borrowing limit used                                                           1,400,000 1,400,000  
Outstanding balance of notes 6,000,000 6,000,000 153,312,000     400,000                                                    
Notes issued in connection with acquisition         2,900,000     35,000,000                                                
Repayments of Notes payable             12,000,000                                                  
Guarantee obligation by domestic subsidiaries for borrowings under bank credit facility $ 700,000,000 $ 700,000,000