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Acquisitions - Summary of Purchase Price Allocation (Detail) (USD $) In Thousands, except Share data, unless otherwise specified |  |  |  | 1 Months Ended
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Dec. 31, 2011 | Jan. 13, 2011 | Sep. 30, 2010 Fairfax, LLC [Member] | Jan. 31, 2012 JVB Holdings [Member] | Jan. 31, 2011 JVB Holdings [Member] | Jan. 13, 2011 JVB Holdings [Member]
Schedule Of Business Acquisitions Purchase Price Allocation [Line Items] |  |  |  |  |  |
Restricted cash |  |  | $ 100 |  |  |
Other assets |  |  | 220 |  |  |
Accounts payable |  |  | (23) |  |  |
Purchase price |  |  | 297 |  | 16,813 |
Number of units/shares issued |  |  |  | 186,339 | 313,051 | 313,051
Multiplied by |  |  |  |  | $ 4.89 |
Value of stock consideration |  |  |  |  | 1,531 |
Cash consideration | 14,956 | 15,044 |  |  | 14,956 | 5,646
Contingent payments due |  |  |  |  | 326 |
Fair value obligation of business combination | $ 0 | $ 326 |  |  |  |

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- Definition Amount of potential cash payments that could result from the contingent consideration arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 51 -Subparagraph f -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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. + Details
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- Definition Amount of cash paid to acquire the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141R -Paragraph 68 -Subparagraph f(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 2: 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Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 51 -Subparagraph d -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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. + Details
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- Definition The total cost of the acquired entity including the cash paid to shareholders of acquired entities, fair value of debt and equity securities issued to shareholders of acquired entities, the fair value of the liabilities assumed, and direct costs of the acquisition. + References Reference 1: 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. + Details
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- Definition The amount of acquisition cost of a business combination allocated to accounts payable of the acquired entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 51 -Subparagraph e -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. + Details
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