2. Finance Receivables (Detail 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Finance Receivables Details
Balance at beginning of period	$ 24,881	$ 11,251	$ 19,594	$ 10,351
Provision for credit losses	17,371	7,711	32,519	12,547
Charge-offs	(13,361)	(8,278)	(26,277)	(16,580)
Recoveries	3,210	3,409	6,265	7,775
Balance at end of period	$ 32,101	$ 14,093	$ 32,101	$ 14,093