Commitments and Contingencies (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Commitments and Contingencies Disclosure [Abstract]
Standby letters of credit, required to perform on financial guarantees	$ 0	$ 0
Standby letters of credit that expire within one year	198,500,000
Standby letters of credit that expire thereafter	14,000,000
Standby letters of credit fees	2,500,000	$ 1,900,000
Residential mortgage loan repurchase reserve liability	$ 200,000
Days past due of GNMA loans available for repurchase	90 days
GNMA Loans past due by 90 days, but not yet repurchased	$ 1,000,000
Loss Contingency Accrual	5,700,000
Concentration Risk [Line Items]
Prior Bankruptcy Recoveries by Plaintiffs	110,000,000
Minimum
Concentration Risk [Line Items]
Loss Contingency, Damages Sought, Value	386,200,000
Maximum
Concentration Risk [Line Items]
Loss Contingency, Damages Sought, Value	$ 429,800,000
Product Concentration Risk | Revenue Benchmark | Real Estate Loans as Part of Loan portfolio
Concentration Risk [Line Items]
Concentration risk, percentage	75.00%	78.00%
Product Concentration Risk | Revenue Benchmark | Multifamily Loans as Part of Loan portfolio [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	19.00%
Product Concentration Risk | Revenue Benchmark | Commercial Office Loans as Part of Loan portfolio [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	8.00%