v3.26.3
Note 2 - Securities - Securities in a Continuous Loss Position (Details) - USD ($)
$ in Thousands
Sep. 30, 2026
Dec. 31, 2025
Securities available for sale, continuous unrealized loss position, less than 12 months $ 574,810 $ 48,801
Securities available for sale, continuous unrealized loss position, less than 12 months, unrealized loss 24,610 270
Securities available for sale, continuous unrealized loss position, 12 months or more 510,035 496,500
Securities available for sale, continuous unrealized loss position, 12 months or more, unrealized loss 53,596 36,586
Securities available for sale, continuous unrealized loss position 1,084,845 545,301
Securities available for sale, continuous unrealized loss position, unrealized loss 78,206 36,856
US Treasury Securities [Member]    
Securities available for sale, continuous unrealized loss position, less than 12 months 50,414 0
Securities available for sale, continuous unrealized loss position, less than 12 months, unrealized loss 1,544 0
Securities available for sale, continuous unrealized loss position, 12 months or more 0 0
Securities available for sale, continuous unrealized loss position, 12 months or more, unrealized loss 0 0
Securities available for sale, continuous unrealized loss position 50,414 0
Securities available for sale, continuous unrealized loss position, unrealized loss 1,544 0
US Government Agencies Debt Securities [Member]    
Securities available for sale, continuous unrealized loss position, less than 12 months 312,865 41,380
Securities available for sale, continuous unrealized loss position, less than 12 months, unrealized loss 11,603 234
Securities available for sale, continuous unrealized loss position, 12 months or more 367,172 350,926
Securities available for sale, continuous unrealized loss position, 12 months or more, unrealized loss 35,453 26,177
Securities available for sale, continuous unrealized loss position 680,037 392,306
Securities available for sale, continuous unrealized loss position, unrealized loss 47,056 26,411
Collateralized Mortgage-Backed Securities [Member]    
Securities available for sale, continuous unrealized loss position, less than 12 months 48,899 0
Securities available for sale, continuous unrealized loss position, less than 12 months, unrealized loss 4,984 0
Securities available for sale, continuous unrealized loss position, 12 months or more 19,720 22,945
Securities available for sale, continuous unrealized loss position, 12 months or more, unrealized loss 6,010 4,727
Securities available for sale, continuous unrealized loss position 68,619 22,945
Securities available for sale, continuous unrealized loss position, unrealized loss 10,994 4,727
Municipal General Obligation Bonds [Member]    
Securities available for sale, continuous unrealized loss position, less than 12 months 87,913 4,465
Securities available for sale, continuous unrealized loss position, less than 12 months, unrealized loss 4,714 23
Securities available for sale, continuous unrealized loss position, 12 months or more 101,275 102,736
Securities available for sale, continuous unrealized loss position, 12 months or more, unrealized loss 9,521 4,143
Securities available for sale, continuous unrealized loss position 189,188 107,201
Securities available for sale, continuous unrealized loss position, unrealized loss 14,235 4,166
Municipal Revenue Bonds [Member]    
Securities available for sale, continuous unrealized loss position, less than 12 months 38,990 2,956
Securities available for sale, continuous unrealized loss position, less than 12 months, unrealized loss 1,214 13
Securities available for sale, continuous unrealized loss position, 12 months or more 21,868 19,893
Securities available for sale, continuous unrealized loss position, 12 months or more, unrealized loss 2,612 1,539
Securities available for sale, continuous unrealized loss position 60,858 22,849
Securities available for sale, continuous unrealized loss position, unrealized loss 3,826 1,552
Other Debt and Equity Securities [Member]    
Securities available for sale, continuous unrealized loss position, less than 12 months 35,729 0
Securities available for sale, continuous unrealized loss position, less than 12 months, unrealized loss 551 0
Securities available for sale, continuous unrealized loss position, 12 months or more 0 0
Securities available for sale, continuous unrealized loss position, 12 months or more, unrealized loss 0 0
Securities available for sale, continuous unrealized loss position 35,729 0
Securities available for sale, continuous unrealized loss position, unrealized loss $ 551 $ 0