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Commitments and Contingencies - Additional Information (Detail) (USD $)
 1 Months Ended 9 Months Ended
Nov. 30, 2013
Sep. 30, 2014
Class_Member
Dec. 31, 2013
Commitments And Contingencies [Line Items]      
License bonds outstanding amount   $ 1,700,000 $ 2,400,000
Number of class member opted out of settlement before finalization   18  
Damages sought amount   87,000,000  
Litigation settlement amount 0    
Guarantor [Member]
      
Commitments And Contingencies [Line Items]      
Letters of credit outstanding   1,900,000 1,900,000
Ashkenazi [Member]
      
Commitments And Contingencies [Line Items]      
Damages sought amount   92,000,000  
Victims Recovery [Member]
      
Commitments And Contingencies [Line Items]      
Damages sought amount   53,000,000  
Marsh Facciola Rader And ML Liquidating Trust [Member]
      
Commitments And Contingencies [Line Items]      
Damages sought amount   200,000,000  
Rader [Member]
      
Commitments And Contingencies [Line Items]      
Damages sought amount   15,000,000  
Marsh [Member]
      
Commitments And Contingencies [Line Items]      
Damages sought amount   115,000,000  
Baldino Group [Member]
      
Commitments And Contingencies [Line Items]      
Damages sought amount   16,000,000  
Number of Plaintiffs   2  
Letters of Credit [Member]
      
Commitments And Contingencies [Line Items]      
Letters of credit outstanding   $ 2,500,000 $ 2,500,000