v3.26.3
Securities (Summary of Investments) (Details) - USD ($)
$ in Thousands
Sep. 30, 2026
Dec. 31, 2025
Schedule of Available for Sale and Held to Maturity Securities [Line Items]    
Available for sale debt securities, amortized cost $ 958,701 $ 1,035,205
Available for sale debt securities, unrealized gains 28 5,208
Available for sale debt securities, unrealized losses (140,928) (100,071)
Available for sale debt securities, allowance for credit losses 0 0
Available for sale debt securities, fair value 817,801 940,342
Obligations of U.S. government agencies and U.S. government-sponsored enterprises    
Schedule of Available for Sale and Held to Maturity Securities [Line Items]    
Available for sale debt securities, amortized cost 41,642 41,639
Available for sale debt securities, unrealized gains 1 93
Available for sale debt securities, unrealized losses (2,184) (1,774)
Available for sale debt securities, allowance for credit losses 0 0
Available for sale debt securities, fair value 39,459 39,958
Mortgage-backed securities issued by U.S. government-sponsored agencies and U.S. government-sponsored enterprises    
Schedule of Available for Sale and Held to Maturity Securities [Line Items]    
Available for sale debt securities, amortized cost 898,998 973,520
Available for sale debt securities, unrealized gains 27 5,100
Available for sale debt securities, unrealized losses (138,089) (97,726)
Available for sale debt securities, allowance for credit losses 0 0
Available for sale debt securities, fair value 760,936 880,894
Obligations of states and political subdivisions    
Schedule of Available for Sale and Held to Maturity Securities [Line Items]    
Available for sale debt securities, amortized cost 650 650
Available for sale debt securities, unrealized gains 0 13
Available for sale debt securities, unrealized losses (70) 0
Available for sale debt securities, allowance for credit losses 0 0
Available for sale debt securities, fair value 580 663
Individual name issuer trust preferred debt securities    
Schedule of Available for Sale and Held to Maturity Securities [Line Items]    
Available for sale debt securities, amortized cost 6,190 6,186
Available for sale debt securities, unrealized gains 0 0
Available for sale debt securities, unrealized losses (60) (83)
Available for sale debt securities, allowance for credit losses 0 0
Available for sale debt securities, fair value 6,130 6,103
Corporate bonds    
Schedule of Available for Sale and Held to Maturity Securities [Line Items]    
Available for sale debt securities, amortized cost 11,221 13,210
Available for sale debt securities, unrealized gains 0 2
Available for sale debt securities, unrealized losses (525) (488)
Available for sale debt securities, allowance for credit losses 0 0
Available for sale debt securities, fair value $ 10,696 $ 12,724