Loans and Allowance for Credit Losses (Narrative) (Details)	3 Months Ended			12 Months Ended
	Jun. 30, 2023	Mar. 31, 2023 USD ($) Default	Mar. 31, 2022 USD ($) Loan	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022 USD ($)
Accounts Notes And Loans Receivable [Line Items]
Accrued interest		$ 107,900,000					$ 100,200,000
Weighted average percentage of forecast			40.00%
Base line economic forecast probability percentage		40.00%
Description of post modification defaults		A payment default occurs if the loan is either 90 days or more delinquent or has been charged off as of the end of the period presented.
Number of post modification defaults | Default		0
Nonaccrual loans		$ 54,344,000					38,991,000
Unfunded commitment to borrowers related to MEFD or TDR		0					0
Loans held for sale		23,436,000					26,385,000
Troubled Debt Restructurings [Member]
Accounts Notes And Loans Receivable [Line Items]
Nonaccrual loans							2,600,000
Accruing and nonaccruing							4,500,000
Reduced interest rate			$ 100,000
Troubled Debt Restructurings [Member] | Loans With Other Modifications [Member]
Accounts Notes And Loans Receivable [Line Items]
Other modifications		100
Modified Loans To Borrowers Experiencing Financial Difficulty [Member]
Accounts Notes And Loans Receivable [Line Items]
Nonaccrual loans		1,600,000
Accruing and nonaccruing		$ 1,618,000
Slower Near-term Growth/Mild Recessionary Scenario S-2 [Member]
Accounts Notes And Loans Receivable [Line Items]
Unemployment percentage rate forecast					5.80%	4.80%
Gross domestic product annual growth percentage				3.20%	0.30%	0.90%
Description of decline in gross domestic product due to mild recession		This leads to a mild recession that starts in the second quarter of 2023 lasting three quarters, with a peak to trough decline of 1.3% resulting in forecasted annual GDP growth of only
Moderate Recessionary Scenario S-3 [Member]
Accounts Notes And Loans Receivable [Line Items]
Allowance for credit losses probability weighting percentage		10.00%
Unemployment percentage rate forecast				6.30%	7.60%	5.60%
Gross domestic product annual growth percentage				2.60%	(0.30%)	0.30%
Mild Recessionary Scenario S-2 [Member]
Accounts Notes And Loans Receivable [Line Items]
Allowance for credit losses probability weighting percentage		50.00%
Downside Scenario S-2 [Member]
Accounts Notes And Loans Receivable [Line Items]
Weighted average percentage of forecast			60.00%
Forecast [Member]
Accounts Notes And Loans Receivable [Line Items]
Unemployment percentage rate forecast				4.00%	3.90%	3.50%
Gross domestic product annual growth percentage	(1.30%)			2.70%	1.90%	1.90%
Residential Mortgages [Member]
Accounts Notes And Loans Receivable [Line Items]
Nonaccrual loans		$ 30,111,000					25,269,000
Loans carried at fair value option		14,900,000					10,800,000
Unpaid principal balance		14,600,000					10,600,000
Residential Mortgages [Member] | Troubled Debt Restructurings [Member]
Accounts Notes And Loans Receivable [Line Items]
Number of TDRs subsequently defaulted | Loan			2
Recorded Investment			$ 100,000
Consumer [Member]
Accounts Notes And Loans Receivable [Line Items]
Nonaccrual loans		6,697,000					6,692,000
Real estate in process of foreclosure		3,800,000					4,900,000
Real estate acquired through foreclosure		400,000					400,000
Consumer [Member] | Troubled Debt Restructurings [Member]
Accounts Notes And Loans Receivable [Line Items]
Number of TDRs subsequently defaulted | Loan			2
Recorded Investment		$ 100,000
Minimum [Member]
Accounts Notes And Loans Receivable [Line Items]
Reportable modification period		9 months
Maximum [Member]
Accounts Notes And Loans Receivable [Line Items]
Reportable modification period		5 years
Total Commercial And Industrial [Member] | Modified Loans To Borrowers Experiencing Financial Difficulty [Member]
Accounts Notes And Loans Receivable [Line Items]
Accruing and nonaccruing		$ 1,618,000
Total Commercial And Industrial [Member] | Total Commercial [Member]
Accounts Notes And Loans Receivable [Line Items]
Nonaccrual loans		15,695,000					5,481,000
Commercial Non-Real Estate [Member] | Troubled Debt Restructurings [Member]
Accounts Notes And Loans Receivable [Line Items]
Number of TDRs subsequently defaulted | Loan			2
Recorded Investment			$ 3,100,000
Commercial Non-Real Estate [Member] | Total Commercial And Industrial [Member] | Modified Loans To Borrowers Experiencing Financial Difficulty [Member]
Accounts Notes And Loans Receivable [Line Items]
Accruing and nonaccruing		934,000
Commercial Non-Real Estate [Member] | Total Commercial And Industrial [Member] | Total Commercial [Member]
Accounts Notes And Loans Receivable [Line Items]
Nonaccrual loans		$ 13,302,000					$ 4,020,000