Loans - Amortized Cost Basis of Loan Modifications (Details) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2023 USD ($)	Sep. 30, 2023 USD ($)
Financing Receivable, Modified [Line Items]
Financing receivable, excluding accrued interest, modified in period, amount	$ 14,036	$ 14,555
Financing receivable, excluding accrued interest, modified in period, to total financing receivables, percentage
Payment Delay
Financing Receivable, Modified [Line Items]
Financing receivable, excluding accrued interest, modified in period, amount	$ 267	$ 332
Term Extension
Financing Receivable, Modified [Line Items]
Financing receivable, excluding accrued interest, modified in period, amount	13,379	$ 13,379
Debt instrument, convertible, conversion ratio		1.84
Loans held-for-investment	18,000	$ 18,000
Payment Delay and Interest Rate Reduction
Financing Receivable, Modified [Line Items]
Financing receivable, excluding accrued interest, modified in period, amount	0	208
Payment Delay, Term Extension, and Interest Rate Reductions
Financing Receivable, Modified [Line Items]
Financing receivable, excluding accrued interest, modified in period, amount	390	636
Commercial mortgage
Financing Receivable, Modified [Line Items]
Financing receivable, excluding accrued interest, modified in period, amount	$ 171	$ 236
Financing receivable, excluding accrued interest, modified in period, to total financing receivables, percentage	0.02%	0.03%
Commercial mortgage | Payment Delay
Financing Receivable, Modified [Line Items]
Financing receivable, excluding accrued interest, modified in period, amount	$ 171	$ 236
Commercial mortgage | Term Extension
Financing Receivable, Modified [Line Items]
Financing receivable, excluding accrued interest, modified in period, amount	0	0
Commercial mortgage | Payment Delay and Interest Rate Reduction
Financing Receivable, Modified [Line Items]
Financing receivable, excluding accrued interest, modified in period, amount	0	0
Commercial mortgage | Payment Delay, Term Extension, and Interest Rate Reductions
Financing Receivable, Modified [Line Items]
Financing receivable, excluding accrued interest, modified in period, amount	0	0
Commercial and industrial loans
Financing Receivable, Modified [Line Items]
Financing receivable, excluding accrued interest, modified in period, amount	$ 13,865	$ 14,319
Financing receivable, excluding accrued interest, modified in period, to total financing receivables, percentage	9.58%	9.89%
Commercial and industrial loans | Payment Delay
Financing Receivable, Modified [Line Items]
Financing receivable, excluding accrued interest, modified in period, amount	$ 96	$ 96
Commercial and industrial loans | Term Extension
Financing Receivable, Modified [Line Items]
Financing receivable, excluding accrued interest, modified in period, amount	13,379	13,379
Commercial and industrial loans | Payment Delay and Interest Rate Reduction
Financing Receivable, Modified [Line Items]
Financing receivable, excluding accrued interest, modified in period, amount	0	208
Commercial and industrial loans | Payment Delay, Term Extension, and Interest Rate Reductions
Financing Receivable, Modified [Line Items]
Financing receivable, excluding accrued interest, modified in period, amount	$ 390	$ 636