Annual report pursuant to Section 13 and 15(d)

Note 3 - Securities - Securities with Gross Unrealized Losses Not Recognized in Income (Details)

v3.24.1
Note 3 - Securities - Securities with Gross Unrealized Losses Not Recognized in Income (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Estimated fair value, less than 12 months $ 0 $ 204,281
Unrealized losses, less than 12 months 0 (40,890)
Estimated fair value, 12 months or longer 362,299 163,050
Unrealized losses, 12 months or longer (67,963) (43,698)
Estimated fair value, total 362,299 367,331
Unrealized losses, total $ (67,963) $ (84,588)
percentage 97.60% 99.00%
Number of securities, unrealized losses, less than 12 months 0 311
Number of securities, unrealized losses, 12 months or longer 434 135
Number of securitiesunrealized losses, total 434 446
US Government-sponsored Enterprises Debt Securities [Member]    
Estimated fair value, less than 12 months $ 0 $ 0
Unrealized losses, less than 12 months 0 0
Estimated fair value, 12 months or longer 7,883 7,625
Unrealized losses, 12 months or longer (1,001) (1,258)
Estimated fair value, total 7,883 7,625
Unrealized losses, total $ (1,001) $ (1,258)
percentage 100.00% 100.00%
Collateralized Mortgage Obligations and Residential Mortgage Backed Securities [Member]    
Estimated fair value, less than 12 months $ 0 $ 32,700
Unrealized losses, less than 12 months 0 (4,955)
Estimated fair value, 12 months or longer 123,464 101,416
Unrealized losses, 12 months or longer (25,946) (23,929)
Estimated fair value, total 123,464 134,116
Unrealized losses, total $ (25,946) $ (28,884)
percentage 100.00% 100.00%
US States and Political Subdivisions Debt Securities [Member]    
Estimated fair value, less than 12 months $ 0 $ 171,581
Unrealized losses, less than 12 months 0 (35,935)
Estimated fair value, 12 months or longer 229,595 52,961
Unrealized losses, 12 months or longer (40,203) (17,386)
Estimated fair value, total 229,595 224,542
Unrealized losses, total $ (40,203) $ (53,321)
percentage 96.20% 98.60%
Collateralized Debt Obligations [Member]    
Estimated fair value, less than 12 months $ 0 $ 0
Unrealized losses, less than 12 months 0 0
Estimated fair value, 12 months or longer 1,357 1,048
Unrealized losses, 12 months or longer (813) (1,125)
Estimated fair value, total 1,357 1,048
Unrealized losses, total $ (813) $ (1,125)
percentage 100.00% 100.00%