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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 |  |  |
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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 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition Fair Value of the liabilities incurred by the acquirer to former owners of the acquiree, including the fair value of any contingent consideration. If liabilities transferred as consideration remain within the combined entity after the business combination (for example, because the assets or liabilities were transferred to the acquiree rather than to its former owners), and the acquirer therefore retains control of them; in that situation, the acquirer measures those liabilities at their carrying amounts immediately before the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 25 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6405-128476 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141R -Paragraph 68 -Subparagraph f(3) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 51 -Subparagraph d -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141R -Paragraph 39, 40, 41 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477 + Details
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