Loans and Leases Held for Investment at Amortized Cost, Net of Allowance for Loan and Lease Losses - Schedule of Nonaccrual Loans and Leases (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Financing Receivable, Past Due [Line Items]
Nonaccrual	$ 56,964	$ 72,304
Nonaccrual with no related ACL	$ 15,451	$ 13,141
Nonaccrual ratios (as a percent)	1.30%	1.80%
Consumer
Financing Receivable, Past Due [Line Items]
Nonaccrual	$ 16,204	$ 22,019
Nonaccrual with no related ACL	$ 358	$ 295
Nonaccrual ratios (as a percent)	0.40%	0.60%
Consumer \| Unsecured personal
Financing Receivable, Past Due [Line Items]
Nonaccrual	$ 15,518	$ 21,387
Nonaccrual with no related ACL	0	0
Consumer \| Residential mortgages
Financing Receivable, Past Due [Line Items]
Nonaccrual	358	295
Nonaccrual with no related ACL	358	295
Consumer \| Secured consumer
Financing Receivable, Past Due [Line Items]
Nonaccrual	328	337
Nonaccrual with no related ACL	0	0
Commercial
Financing Receivable, Past Due [Line Items]
Nonaccrual	40,760	50,285
Nonaccrual with no related ACL	$ 15,093	$ 12,846
Nonaccrual ratios (as a percent)	6.20%	8.20%
Commercial \| Loans guaranteed by the Small Business Association
Financing Receivable, Past Due [Line Items]
Nonaccrual	$ 29,500	$ 31,200
Commercial \| Equipment finance
Financing Receivable, Past Due [Line Items]
Nonaccrual	4,042	4,516
Nonaccrual with no related ACL	0	0
Commercial \| Commercial real estate
Financing Receivable, Past Due [Line Items]
Nonaccrual	10,809	18,280
Nonaccrual with no related ACL	5,896	5,345
Commercial \| Commercial and industrial
Financing Receivable, Past Due [Line Items]
Nonaccrual	25,909	27,489
Nonaccrual with no related ACL	$ 9,197	$ 7,501

Percentage of nonaccrual to total financing receivable outstanding.

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