v3.26.1
Securities - Narrative (Details)
 3 Months Ended
Mar. 31, 2026
USD ($)
security
Mar. 31, 2025
USD ($)
Dec. 31, 2025
USD ($)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Amortized cost $ 1,912,515,000   $ 1,687,817,000
Estimated fair values 1,826,037,000   1,615,954,000
Tax benefit (provision) on net realized gains and losses (411,800) $ (200)  
Allowance for credit loss on available for sale debt securities $ 0   0
Securities unrealized loss | security 478    
Impairment existed based on a combination of factors $ 0    
Investment in federal home loan bank 30,500,000   26,800,000
Investment in federal reserve bank 14,800,000   14,800,000
Restricted stock, at cost 45,811,000   42,187,000
Asset Pledged as Collateral      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Amortized cost 1,100,000,000   1,100,000,000
Estimated fair values 1,000,000,000.0   1,100,000,000
Community Bankers' Bank      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Restricted stock, at cost 111,000   111,000
U.S. Treasuries and government agencies      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Amortized cost 158,733,000   159,088,000
Estimated fair values $ 149,463,000   150,124,000
Securities in unrealized loss positions | security 10    
Residential mortgage backed - agency      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Amortized cost $ 60,008,000   57,731,000
Estimated fair values $ 57,375,000   55,385,000
Securities in unrealized loss positions | security 11    
Commercial mortgage backed - agency      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Amortized cost $ 72,465,000   74,253,000
Estimated fair values $ 71,684,000   73,896,000
Securities in unrealized loss positions | security 15    
State and Municipal Securities      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Securities in unrealized loss positions | security 347    
Residential mortgage backed - non-agency      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Amortized cost $ 379,401,000   221,443,000
Estimated fair values $ 372,486,000   218,092,000
Securities in unrealized loss positions | security 63    
Commercial mortgage backed - non-agency      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Amortized cost $ 100,064,000   112,082,000
Estimated fair values $ 98,377,000   111,109,000
Securities in unrealized loss positions | security 8    
Asset-backed      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Amortized cost $ 50,732,000   53,954,000
Estimated fair values $ 50,300,000   53,466,000
Securities in unrealized loss positions | security 17    
Other      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Amortized cost $ 36,954,000   32,162,000
Estimated fair values $ 36,083,000   $ 31,308,000
Securities in unrealized loss positions | security 7