11. Fair Value measurements (Details 3) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Residual Interest in Securitizations:
Balance at beginning of period	$ 3,505	$ 4,612	$ 4,824	$ 4,414
Cash paid (received) during period	(1,259)	4	(2,578)	(22)
Included in earnings		234		458
Balance at end of period	2,246	4,850	2,246	4,850
Warrant Derivative Liability:
Balance at beginning of period		114	355	967
Included in earnings		188	228	391
Reclassification to equity		(251)	(583)	(1,307)
Balance at end of period		$ 51		$ 51