v3.26.3
Note 3 - Investment Securities Available for Sale - Investment Securities With Unrealized Losses (Details) - USD ($)
$ in Thousands
Sep. 30, 2026
Dec. 31, 2025
Less than 12 months fair value $ 345,185 $ 26,220
Less than 12 months unrealized losses 16,325 151
12 months or more fair value 121,131 150,589
12 months or more unrealized losses 28,052 19,736
Total fair value 466,316 176,809
Total unrealized losses 44,377 19,887
Residential Mortgage Backed Securities Issued by US Government Sponsored Enterprises [Member]    
Less than 12 months fair value 189,335 16,496
Less than 12 months unrealized losses 8,441 109
12 months or more fair value 49,482 63,328
12 months or more unrealized losses 9,505 6,955
Total fair value 238,817 79,824
Total unrealized losses 17,946 7,064
Commercial Mortgage Backed Securities Issued by US Government Agencies [Member]    
Less than 12 months fair value 100,447 6,941
Less than 12 months unrealized losses 4,838 35
12 months or more fair value 46,760 51,781
12 months or more unrealized losses 11,027 8,307
Total fair value 147,207 58,722
Total unrealized losses 15,865 8,342
US States and Political Subdivisions Debt Securities [Member]    
Less than 12 months fair value 55,403 2,783
Less than 12 months unrealized losses 3,046 7
12 months or more fair value 24,889 35,480
12 months or more unrealized losses 7,520 4,474
Total fair value 80,292 38,263
Total unrealized losses $ 10,566 $ 4,481