v3.25.2
Fair Value (Narrative) (Details) - USD ($)
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
Mar. 31, 2025
Mar. 31, 2024
Dec. 31, 2023
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Loans Receivable, Fair Value Disclosure $ 7,734,551,000   $ 7,734,551,000   $ 7,594,692,000      
Alternative Investment 50,808,000   50,808,000   50,142,000      
Loans Held-for-sale, Fair Value Disclosure 4,385,000   4,385,000   5,550,000      
Impaired Financing Receivable, Carrying Value 45,773,000   $ 45,773,000   51,850,000      
Discount percentage applied to real estate appraised values     15.00%          
Discount percentage applied to lot development appraised values     6.00%          
Partial Charge-Offs On Impaired Loans     $ 3,501,000   5,009,000      
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment 774,000   774,000   1,299,000      
Impaired Loan Fair Value 1,613,000   1,613,000   2,946,000      
Partial Charge-Offs On Impaired Loans carried at Fair Value     556,000   488,000      
Book Value Of Impaired Loans Carried At Fair Value 1,695,000   1,695,000   2,986,000      
Impaired Financing Receivable, carried at fair value, related expense 116,000 $ (23,000) 48,000 $ (58,000)        
MSR recorded at lower of cost or fair value 13,729,000 14,271,000 13,729,000 14,271,000 13,918,000 $ 13,760,000 $ 14,435,000 $ 14,656,000
Mortgage Servicing Rights Fair Value 400,000   400,000   400,000      
Valuation allowance of MSR 23,000 28,000 23,000 28,000 19,000 $ 17,000 $ 69,000 $ 94,000
MSRs recorded at cost 13,400,000   13,400,000   13,500,000      
Changes due to fair value adjustments 6,000 (41,000) 4,000 (66,000)        
Other Real Estate, Foreclosed Assets, and Repossessed Assets 638,000   638,000   938,000      
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Unfunded Commitments 15,600,000   15,600,000   $ 17,600,000      
Alternative Investment, income recognized 182,000 $ (92,000) (117,000) (782,000)        
Other Real Estate, Valuation Adjustments $ 60,000   $ 21,000 $ 0        
Credit Spread Assumption 3.67%   3.67%   3.67%      
Fair Value Measured at Net Asset Value Per Share [Member]                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Alternative Investment $ 35,200,000   $ 35,200,000   $ 32,600,000      
Fair Value, Inputs, Level 3 [Member]                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Loans Receivable, Fair Value Disclosure 7,730,006,000   7,730,006,000   7,589,057,000      
Impaired Loan Fair Value 1,613,000   1,613,000   2,946,000      
Commercial Receivables, excluding Commercial, Financial, and Agricultural [Domain]                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Impaired Financing Receivable, Related Allowance 82,000   82,000   40,000      
Financing Receivable, not collateral dependent [Domain]                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Impaired Financing Receivable, Related Allowance 692,000   692,000   1,259,000      
Fair Value, Nonrecurring [Member]                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Loans Receivable, Fair Value Disclosure 1,613,000   1,613,000   2,946,000      
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member]                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Loans Receivable, Fair Value Disclosure 1,613,000   1,613,000   2,946,000      
Other Real Estate, Foreclosed Assets, and Repossessed Assets $ 0   $ 0   $ 938,000