v3.26.1
Fair Value (Narrative) (Details) - USD ($)
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2024
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Loans Receivable, Fair Value Disclosure $ 9,520,842,000   $ 9,520,842,000   $ 7,856,990,000      
Alternative Investment 50,732,000   50,732,000   51,867,000      
Loans Held-for-sale, Fair Value Disclosure 16,327,000   16,327,000   4,004,000      
Impaired Financing Receivable, Carrying Value 53,238,000   $ 53,238,000   46,185,000      
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     $ 277,000   4,740,000      
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment 4,424,000   4,424,000   739,000      
Impaired Loan Fair Value 3,804,000   3,804,000   4,061,000      
Partial Charge-Offs On Impaired Loans carried at Fair Value     165,000   4,640,000      
Book Value Of Impaired Loans Carried At Fair Value 4,083,000   4,083,000   4,081,000      
Impaired Financing Receivable, carried at fair value, related expense (200,000) $ 116,000 (1,400,000) $ 48,000        
MSR recorded at lower of cost or fair value 13,497,000 13,729,000 13,497,000 13,729,000 13,697,000 $ 13,623,000 $ 13,760,000 $ 13,918,000
Mortgage Servicing Rights Fair Value 29,000   29,000   35,000      
Valuation allowance of MSR 4,000 23,000 4,000 23,000 3,000 $ 4,000 $ 17,000 $ 19,000
MSRs recorded at cost 13,500,000   13,500,000   13,700,000      
Changes due to fair value adjustments 0 6,000 1,000 4,000        
Other Real Estate, Foreclosed Assets, and Repossessed Assets 19,836,000   19,836,000   729,000      
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Unfunded Commitments 11,700,000   11,700,000   $ 12,600,000      
Alternative Investment, income recognized 414,000 182,000 920,000 (117,000)        
Other Real Estate, Valuation Adjustments $ 585,000 $ 60,000 $ 607,000 $ 60,000        
Maximum [Member]                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Credit Spread Assumption 3.67%   3.67%   4.45%      
Minimum [Member]                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Credit Spread Assumption   0.75%   0.75% 3.67%      
Fair Value Measured at Net Asset Value Per Share [Member]                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Alternative Investment $ 39,100,000   $ 39,100,000   $ 39,300,000      
Fair Value, Inputs, Level 3 [Member]                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Loans Receivable, Fair Value Disclosure 9,504,378,000   9,504,378,000   7,852,871,000      
Impaired Loan Fair Value 3,804,000   3,804,000   4,061,000      
Fair Value, Nonrecurring [Member]                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Loans Receivable, Fair Value Disclosure 3,804,000   3,804,000   4,061,000      
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 3,804,000   3,804,000   4,061,000      
Other Real Estate, Foreclosed Assets, and Repossessed Assets $ 19,678,000   $ 19,678,000   $ 0