10. Fair Value Measurements (Details - Fair Value Financial Assets) - USD ($) $ in Thousands	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016
Assets:
Cash and cash equivalents	$ 17,435		$ 12,731
Restricted cash and equivalents	119,940		111,965
Finance receivables, net	1,800,111		2,171,846
Finance receivables measured at fair value	412,895	$ 209,847	0	$ 0	$ 0	$ 0
Accrued interest receivable	37,517		46,753
Liabilities:
Warehouse lines of credit	137,930		112,408
Accrued interest payable	4,614		4,212
Securitization trust debt	2,031,704		2,089,678
Subordinated renewable notes	15,831		16,566
Carrying Value [Member]
Assets:
Cash and cash equivalents	17,435		12,731
Restricted cash and equivalents	119,940		111,965
Finance receivables, net	1,793,154		2,195,797
Finance receivables measured at fair value	412,895
Accrued interest receivable	37,517		46,753
Liabilities:
Warehouse lines of credit	137,930		112,408
Accrued interest payable	4,614		4,212
Securitization trust debt	2,030,705		2,083,215
Subordinated renewable notes	15,831		16,566
Level 1 [Member]
Assets:
Cash and cash equivalents	17,435		12,731
Restricted cash and equivalents	119,940		111,965
Finance receivables, net	0		0
Finance receivables measured at fair value	0
Accrued interest receivable	0		0
Liabilities:
Warehouse lines of credit	0		0
Accrued interest payable	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
Accrued interest receivable	0		0
Liabilities:
Warehouse lines of credit	0		0
Accrued interest payable	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	1,800,111		2,171,846
Finance receivables measured at fair value	412,895
Accrued interest receivable	37,517		46,753
Liabilities:
Warehouse lines of credit	137,930		112,408
Accrued interest payable	4,614		4,212
Securitization trust debt	2,031,704		2,089,678
Subordinated renewable notes	$ 15,831		$ 16,566