Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Schedule of Residual Interests Securitized Receivables and Derivatives Carried at Fair Value (Parenthetical) (Detail)

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Fair Value Measurements - Schedule of Residual Interests Securitized Receivables and Derivatives Carried at Fair Value (Parenthetical) (Detail) (USD $)
Sep. 30, 2014
Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Allowance for loan losses on financing receivables $ 11,000,000 $ 11,000,000
Amortized costs 42,100,000  
Financing Receivable [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Net fair value collateral impaired loan 800,000 800,000
Allowance for loan losses on financing receivables $ 11,000,000 $ 11,000,000