Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Schedule of Reconciliation of Residual Assets (Detail)

v2.4.0.8
Fair Value Measurements - Schedule of Reconciliation of Residual Assets (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Unrealized loss on residual assets $ (13) $ (208)
Residual Assets [Member]
   
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Balance, beginning of period 4,863 4,638
Accretion 150 127
Collections (510) (121)
Unrealized loss on residual assets (13) (208)
Balance, end of period $ 4,490 $ 4,436