Description of Business and Basis of Presentation (Error Correction) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Finance receivables	$ 27,714	$ 17,772
Net cash from operating activities - continuing operations	65,924	(29,550)
Net cash from operating activities	65,924	(67,355)
Purchases of investment securities	(64,473)	(107,312)
Proceeds from sales/maturities of investment securities	28,008	104,222
Net change in short-term and other investing activities	(7,316)	1,071
Net investment in loan receivables		1,071
Other investing activities	0	8,081
Net cash from investing activities - continuing operations	(87,109)	(20,997)
Net cash from investing activities	(87,109)	(23,499)
Customer deposits at the Bank		(888)
Net cash from financing activities	$ (218,300)	(160,484)
As Previously Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Finance receivables		18,843
Net cash from operating activities - continuing operations		(28,479)
Net cash from operating activities		(66,284)
Purchases of investment securities		(67,312)
Proceeds from sales/maturities of investment securities		24,102
Net change in short-term and other investing activities		48,431
Customer deposits at the Bank		(888)
Other investing activities		(230)
Net cash from investing activities - continuing operations		(22,956)
Net cash from investing activities		(25,458)
Net cash from financing activities		(159,596)
Adjustments
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Finance receivables		(1,071)
Net cash from operating activities - continuing operations		(1,071)
Net cash from operating activities		(1,071)
Purchases of investment securities		(40,000)
Proceeds from sales/maturities of investment securities		80,120
Net change in short-term and other investing activities		(48,431)
Net investment in loan receivables		1,071
Customer deposits at the Bank		888
Other investing activities		8,311
Net cash from investing activities - continuing operations		1,959
Net cash from investing activities		1,959
Customer deposits at the Bank		(888)
Net cash from financing activities		$ (888)