Loans Held For Investment, Loans Held For Sale, Notes, Certificates and Secured Borrowings - Nonaccrual and Past Due Table (Details) $ in Thousands	Jun. 30, 2021 USD ($)
Financing Receivable, Past Due [Line Items]
Nonaccrual	$ 17,014
Nonaccrual with no related ACL	5,302
Consumer Portfolio Segment
Financing Receivable, Past Due [Line Items]
Nonaccrual	12,556
Nonaccrual with no related ACL	3,922
Consumer Portfolio Segment | Unsecured personal
Financing Receivable, Past Due [Line Items]
Nonaccrual	80
Nonaccrual with no related ACL	0
Consumer Portfolio Segment | Residential mortgages
Financing Receivable, Past Due [Line Items]
Nonaccrual	2,973
Nonaccrual with no related ACL	2,719
Consumer Portfolio Segment | Secured consumer
Financing Receivable, Past Due [Line Items]
Nonaccrual	9,503
Nonaccrual with no related ACL	1,203
Consumer Portfolio Segment | Other consumer
Financing Receivable, Past Due [Line Items]
Nonaccrual	0
Nonaccrual with no related ACL	0
Commercial Portfolio Segment
Financing Receivable, Past Due [Line Items]
Nonaccrual	4,458
Nonaccrual with no related ACL	1,380
Commercial Portfolio Segment | Equipment finance
Financing Receivable, Past Due [Line Items]
Nonaccrual	846
Nonaccrual with no related ACL	0
Commercial Portfolio Segment | Commercial real estate
Financing Receivable, Past Due [Line Items]
Nonaccrual	1,624
Nonaccrual with no related ACL	317
Commercial Portfolio Segment | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Nonaccrual	1,988
Nonaccrual with no related ACL	$ 1,063