Quarterly report pursuant to Section 13 or 15(d)

Nonrecourse Debt - Additional Information (Detail)

v2.4.0.8
Nonrecourse Debt - Additional Information (Detail) (USD $)
 6 Months Ended 1 Months Ended 6 Months Ended
Jun. 30, 2014
Dec. 31, 2013
Jun. 30, 2014
Other Nonrecourse Debt [Member]
Dec. 31, 2013
Other Nonrecourse Debt [Member]
Dec. 31, 2013
Asset-Backed Nonrecourse Notes [Member]
Jun. 30, 2014
Asset-Backed Nonrecourse Notes [Member]
Jun. 30, 2014
Asset-Backed Nonrecourse Notes [Member]
Other Assets [Member]
Debt Instrument [Line Items]              
Nonrecourse Asset-Backed Notes $ 97,393,000 $ 100,081,000     $ 100,000,000    
Nonrecourse Asset-Backed Notes, interest rate         2.79%    
Nonrecourse Asset-Backed Notes, maturity period         2019-12    
Outstanding Notes         100,100,000 97,400,000  
Amount of financing receivables pledged for Asset-Backed Notes     141,600,000 156,400,000 109,500,000 108,200,000  
Anticipated debt balance at maturity         57,000,000    
Prepayment penalty, maturity date         2018-12    
Make whole payment discount rate         0.50%    
Cost on issuance of Notes $ 10,200,000           $ 200,000
Debt issuance cost amortization period             72 months