Interest Income and Interest Expense (Details - Interest expense) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Interest expense	$ 146,631	$ 87,524	$ 75,239
Securitization Trust Debt [Member]
Debt Instrument [Line Items]
Interest expense	121,409	70,627	64,387
Warehouse Lines Of Credit [Member]
Debt Instrument [Line Items]
Interest expense	19,192	10,310	4,448
Residual interest financing [Member]
Debt Instrument [Line Items]
Interest expense	4,199	4,243	3,763
Subordinated renewable notes [Member]
Debt Instrument [Line Items]
Interest expense	$ 1,831	$ 2,344	$ 2,641