(1) Summary of Significant Accounting Policies (Details Narrative) shares in Thousands, $ in Thousands	12 Months Ended
Dec. 31, 2020 USD ($) shares	Dec. 31, 2019 USD ($) shares	Dec. 31, 2018 USD ($) shares
Product Information [Line Items]
Cash and Cash Equivalents, at Carrying Value	$ 13,466	$ 5,295
[custom:MarkToFinanceReceivablesMeasuredAtFairValue]	29,528	(0)	$ (0)
Other assets	$ 32,317	$ 39,852
Incremental shares excluded from EPS calculation \| shares	13,600	11,300	10,300
Provision for Loan and Lease Losses	$ 14,113	$ 85,773	$ 133,080
Repossessed Vehicles [Member]
Product Information [Line Items]
Other assets	$ 3,800	$ 7,500
Repossessed Vehicles [Member]
Product Information [Line Items]
Ownership percentage in subsidiary	0.80
Dealer concentration [Member] \| Geographic Concentration Risk [Member] \| CALIFORNIA
Product Information [Line Items]
Concentration percentage	13.50%	12.60%
Dealer concentration [Member] \| Geographic Concentration Risk [Member] \| OHIO
Product Information [Line Items]
Concentration percentage	11.10%	10.80%
Dealer concentration [Member] \| Geographic Concentration Risk [Member] \| TEXAS
Product Information [Line Items]
Concentration percentage	5.40%	6.30%
Dealer concentration [Member] \| Geographic Concentration Risk [Member] \| NORTH CAROLINA
Product Information [Line Items]
Concentration percentage	5.30%	5.40%
Dealer concentration [Member] \| Geographic Concentration Risk [Member] \| INDIANA
Product Information [Line Items]
Concentration percentage	5.10%	4.20%

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