Loans and Leases Held for Investment, Net of Allowance For Loan and Lease Losses - Nonaccrual and Past Due Table (Details) $ in Thousands	12 Months Ended
Dec. 31, 2021 USD ($)
Financing Receivable, Past Due [Line Items]
Nonaccrual	$ 9,985
Nonaccrual with no related ACL	$ 6,434
Nonaccrual ratios	0.30%
Allowance for loan and lease losses to nonaccrual loans and leases, percent	1446.00%
Nonaccuring Loans And Leases, Excluding PPP Loans \| Loans And Leases, Class \| Credit Concentration Risk
Financing Receivable, Past Due [Line Items]
Concentration risk, percentage	0.40%
Consumer Portfolio Segment
Financing Receivable, Past Due [Line Items]
Nonaccrual	$ 6,060
Nonaccrual with no related ACL	$ 4,384
Nonaccrual ratios	0.30%
Consumer Portfolio Segment \| Unsecured personal
Financing Receivable, Past Due [Line Items]
Nonaccrual	$ 1,676
Nonaccrual with no related ACL	0
Consumer Portfolio Segment \| Residential mortgages
Financing Receivable, Past Due [Line Items]
Nonaccrual	1,373
Nonaccrual with no related ACL	1,373
Consumer Portfolio Segment \| Secured consumer
Financing Receivable, Past Due [Line Items]
Nonaccrual	3,011
Nonaccrual with no related ACL	3,011
Commercial Portfolio Segment
Financing Receivable, Past Due [Line Items]
Nonaccrual	3,925
Nonaccrual with no related ACL	$ 2,050
Nonaccrual ratios	0.40%
Commercial Portfolio Segment \| Equipment finance
Financing Receivable, Past Due [Line Items]
Nonaccrual	$ 603
Nonaccrual with no related ACL	0
Commercial Portfolio Segment \| Commercial real estate
Financing Receivable, Past Due [Line Items]
Nonaccrual	989
Nonaccrual with no related ACL	989
Commercial Portfolio Segment \| Commercial and industrial
Financing Receivable, Past Due [Line Items]
Nonaccrual	2,333
Nonaccrual with no related ACL	$ 1,061

Percentage of allowance for credit loss to nonaccrual financing receivable.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph (a)
-Subparagraph (3)

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