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Acquisitions - Summary of Purchase Price Allocation (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified
1 Months Ended
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