11. Fair Value measurements (Details-fair values) - USD ($) $ in Thousands	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013
Assets:
Cash and cash equivalents	$ 18,436		$ 17,859
Restricted cash and equivalents	200,122		175,382
Finance receivables, net	1,687,552		1,512,567
Finance receivables measured at fair value	316	$ 743	1,664	$ 5,686	$ 9,058	$ 14,476
Residual interest in securitizations	20		68
Accrued interest receivable	28,079		23,372
Liabilities:
Warehouse lines of credit	61,771		56,839
Accrued interest payable	3,055		2,613
Residual interest financing	11,274		12,327
Debt secured by receivables measured at fair value	0		1,250
Securitization trust debt	1,788,334		1,619,742
Subordinated renewable notes	14,982		15,233
Carrying Value [Member]
Assets:
Cash and cash equivalents	18,436		17,859
Restricted cash and equivalents	200,122		175,382
Finance receivables, net	1,710,257		1,534,496
Finance receivables measured at fair value	316		1,664
Residual interest in securitizations	20		68
Accrued interest receivable	28,079		23,372
Liabilities:
Warehouse lines of credit	61,771		56,839
Accrued interest payable	3,055		2,613
Residual interest financing	11,274		12,327
Debt secured by receivables measured at fair value	0		1,250
Securitization trust debt	1,775,574		1,598,496
Subordinated renewable notes	14,982		15,233
Fair Value Inputs Level 1 [Member]
Assets:
Cash and cash equivalents	18,436		17,859
Restricted cash and equivalents	200,122		175,382
Finance receivables, net	0		0
Finance receivables measured at fair value	0		0
Residual interest in securitizations	0		0
Accrued interest receivable	0		0
Liabilities:
Warehouse lines of credit	0		0
Accrued interest payable	0		0
Residual interest financing	0		0
Debt secured by receivables measured at fair value	0		0
Securitization trust debt	0		0
Subordinated renewable notes	0		0
Level 2 [Member]
Assets:
Cash and cash equivalents	0		0
Restricted cash and equivalents	0		0
Finance receivables, net	0		0
Finance receivables measured at fair value	0		0
Residual interest in securitizations	0		0
Accrued interest receivable	0		0
Liabilities:
Warehouse lines of credit	0		0
Accrued interest payable	0		0
Residual interest financing	0		0
Debt secured by receivables measured at fair value	0		0
Securitization trust debt	0		0
Subordinated renewable notes	0		0
Level 3 [Member]
Assets:
Cash and cash equivalents	0		0
Restricted cash and equivalents	0		0
Finance receivables, net	1,687,552		1,512,567
Finance receivables measured at fair value	316		1,664
Residual interest in securitizations	20		68
Accrued interest receivable	28,079		23,372
Liabilities:
Warehouse lines of credit	61,771		56,839
Accrued interest payable	3,055		2,613
Residual interest financing	11,274		12,327
Debt secured by receivables measured at fair value	0		1,250
Securitization trust debt	1,788,334		1,619,742
Subordinated renewable notes	$ 14,982		$ 15,233