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3. Allowance for Finance Credit Losses (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Finance Receivables Details    
Balance at beginning of period $ 19,594 $ 10,351
Provision for credit losses 76,869 33,495
Charge-offs (69,455) (37,638)
Recoveries 12,618 13,386
Balance at end of period $ 39,626 $ 19,594