v3.26.1
Investment Securities - Unrealized Gross Losses and Fair Values of Securities in a Continuous Loss Position (Details)
6 Months Ended 12 Months Ended
Jun. 30, 2026
USD ($)
security
Dec. 31, 2025
USD ($)
security
Securities in the available-for-sale portfolio in a continuous loss position    
Number of individual securities in a continuous loss position | security 153 137
Time in Continuous Loss, Unrealized Losses    
Less Than 12 Months Unrealized Losses $ (3,673,000) $ (731,000)
12 Months or More Unrealized Losses (180,180,000) (176,649,000)
Total Unrealized Losses (183,853,000) (177,380,000)
Time in Continuous Loss, Fair Value    
Less Than 12 Months Fair Value 335,729,000 103,476,000
12 Months or More Fair Value 1,218,204,000 1,305,827,000
Total Fair Value $ 1,553,933,000 $ 1,409,303,000
Number of securities with intent to sell 0 0
Credit losses recognized on securities $ 0 $ 0
Investment securities comprised of collateralized loan obligations rated AA or better, obligations issued by local state and political subdivisions rated AA or better and non-agency commercial mortgage-backed securities rated AAA 7.00% 7.00%
Allowance for credit losses, investment securities $ 0 $ 0
Residential - Government agency    
Time in Continuous Loss, Unrealized Losses    
12 Months or More Unrealized Losses (1,086,000) (1,079,000)
Total Unrealized Losses (1,086,000) (1,079,000)
Time in Continuous Loss, Fair Value    
12 Months or More Fair Value 7,855,000 8,304,000
Total Fair Value 7,855,000 8,304,000
Residential - Government-sponsored enterprises    
Time in Continuous Loss, Unrealized Losses    
Less Than 12 Months Unrealized Losses (2,566,000) (509,000)
12 Months or More Unrealized Losses (58,745,000) (57,597,000)
Total Unrealized Losses (61,311,000) (58,106,000)
Time in Continuous Loss, Fair Value    
Less Than 12 Months Fair Value 202,269,000 70,705,000
12 Months or More Fair Value 496,773,000 545,262,000
Total Fair Value 699,042,000 615,967,000
Commercial - Government agency    
Time in Continuous Loss, Unrealized Losses    
12 Months or More Unrealized Losses (46,674,000) (46,015,000)
Total Unrealized Losses (46,674,000) (46,015,000)
Time in Continuous Loss, Fair Value    
12 Months or More Fair Value 183,542,000 191,177,000
Total Fair Value 183,542,000 191,177,000
Commercial - Government-sponsored enterprises    
Time in Continuous Loss, Unrealized Losses    
12 Months or More Unrealized Losses (754,000) (1,199,000)
Total Unrealized Losses (754,000) (1,199,000)
Time in Continuous Loss, Fair Value    
12 Months or More Fair Value 39,022,000 41,599,000
Total Fair Value 39,022,000 41,599,000
Commercial - Non-agency    
Time in Continuous Loss, Unrealized Losses    
Less Than 12 Months Unrealized Losses (23,000) (39,000)
12 Months or More Unrealized Losses (26,000)  
Total Unrealized Losses (49,000) (39,000)
Time in Continuous Loss, Fair Value    
Less Than 12 Months Fair Value 14,482,000 14,475,000
12 Months or More Fair Value 7,018,000  
Total Fair Value 21,500,000 14,475,000
Government agency    
Time in Continuous Loss, Unrealized Losses    
Less Than 12 Months Unrealized Losses (498,000)  
12 Months or More Unrealized Losses (38,543,000) (36,640,000)
Total Unrealized Losses (39,041,000) (36,640,000)
Time in Continuous Loss, Fair Value    
Less Than 12 Months Fair Value 81,179,000  
12 Months or More Fair Value 267,192,000 287,275,000
Total Fair Value 348,371,000 287,275,000
Government-sponsored enterprises    
Time in Continuous Loss, Unrealized Losses    
Less Than 12 Months Unrealized Losses (586,000) (183,000)
12 Months or More Unrealized Losses (34,352,000) (34,119,000)
Total Unrealized Losses (34,938,000) (34,302,000)
Time in Continuous Loss, Fair Value    
Less Than 12 Months Fair Value 37,799,000 18,296,000
12 Months or More Fair Value 216,802,000 232,210,000
Total Fair Value $ 254,601,000 $ 250,506,000