Quarterly report pursuant to Section 13 or 15(d)

Nonrecourse Debt - Additional Information (Detail)

v2.4.0.8
Nonrecourse Debt - Additional Information (Detail) (USD $)
 1 Months Ended 1 Months Ended 3 Months Ended
Jul. 31, 2013
Mar. 31, 2014
Dec. 31, 2013
Dec. 31, 2013
Asset-Backed Nonrecourse Notes [Member]
Mar. 31, 2014
Asset-Backed Nonrecourse Notes [Member]
Mar. 31, 2014
Asset-Backed Nonrecourse Notes [Member]
Other Assets [Member]
Mar. 31, 2014
Other Nonrecourse Debt [Member]
Dec. 31, 2013
Other Nonrecourse Debt [Member]
Debt Instrument [Line Items]                
Nonrecourse Asset-Backed Notes   $ 98,742,000 $ 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 98,700,000      
Amount of financing receivables pledged for Asset-Backed Notes       109,500,000 108,400,000   147,300,000 156,400,000
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 $ 8,700,000         $ 200,000    
Debt issuance cost amortization period           72 months