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Restricted Cash (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Restricted Cash And Cash Equivalents Items [Line Items]    
Restricted cash $ 21 $ 2,805
Noninterest-bearing deposits - securing a letter of credit
   
Restricted Cash And Cash Equivalents Items [Line Items]    
Restricted cash 21 784
Noninterest-bearing deposits - legal settlement reserve funds
   
Restricted Cash And Cash Equivalents Items [Line Items]    
Restricted cash   $ 2,021