v3.26.1
Loans And Allowance For Credit Losses (Narrative) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Financing Receivable, Allowance for Credit Loss [Line Items]          
Pledged Financial Instruments, Not Separately Reported, Loans Receivable, for Federal Home Loan Bank Debt $ 3,900,000   $ 3,900,000    
Pledged Financial Instruments, Not Separately Reported, Loans Receivable, for Federal Reserve Bank Debt 2,600,000   2,600,000    
Financing Receivable, Nonaccrual, No Allowance 9,100   9,100   $ 0
Commitments to lend additional funds to customers with restructured loans 29,800   $ 29,800   11,400
Period after which loans are deemed in default (in days)     90 days    
Residential mortgage loans held for sale 3,376   $ 3,376   4,028
Unpaid Principal Balance on Personal Real Estate Loans Held for Sale 3,300   3,300    
HFS Loans on non accrual status 0   0    
HFS loans 90 days past due and still accruing 0   0    
Foreclosed real estate 1,200   1,200   1,200
Residential Real Estate Acquired Through Foreclosure through Obtaining Physical Possession 1,200   1,200   1,000
Personal property acquired in repossession 1,800   1,800   2,300
Loans Receivable          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Accrued Interest Receivable 80,600   80,600   74,400
Accrued Interest Receivable 80,600   80,600   $ 74,400
Commercial Portfolio Segment [Member]          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Financing Receivable, Accrued Interest, Writeoff 44 $ 91 82 $ 203  
Personal Banking Portfolio Segment [Member]          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Financing Receivable, Accrued Interest, Writeoff $ 1,600 $ 1,600 $ 3,100 $ 3,300