2. Allowance for Finance Credit Losses (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Finance Receivables Details
Balance at beginning of period	$ 32,101	$ 14,093	$ 19,594	$ 10,351
Provision for credit losses	20,220	9,465	52,739	22,012
Charge-offs	(20,952)	(9,578)	(47,229)	(26,158)
Recoveries	3,095	2,966	9,360	10,741
Balance at end of period	$ 34,464	$ 16,946	$ 34,464	$ 16,946