Quarterly report pursuant to Section 13 or 15(d)

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

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Note 3 - Securities - Securities with Gross Unrealized Losses Not Recognized in Income (Details)
$ in Thousands
Sep. 30, 2021
USD ($)
Dec. 31, 2020
USD ($)
Estimated fair value, less than 12 months $ 275,644 $ 18,792
Unrealized losses, less than 12 months (5,478) (62)
Estimated fair value, 12 months or longer 3,751 929
Unrealized losses, 12 months or longer (1,292) (1,253)
Estimated fair value, total 279,395 19,721
Unrealized losses, total $ (6,770) $ (1,315)
Number of securities, unrealized losses, less than 12 months 211 8
Number of securities, unrealized losses, 12 months or longer 3 2
Number of securitiesunrealized losses, total 214 10
US Government-sponsored Enterprises Debt Securities [Member]    
Estimated fair value, less than 12 months $ 8,753 $ 4,975
Unrealized losses, less than 12 months (130) (24)
Estimated fair value, 12 months or longer 0 0
Unrealized losses, 12 months or longer 0 0
Estimated fair value, total 8,753 4,975
Unrealized losses, total (130) (24)
Collateralized Mortgage Obligations and Residential Mortgage Backed Securities [Member]    
Estimated fair value, less than 12 months 133,551 11,953
Unrealized losses, less than 12 months (2,693) (36)
Estimated fair value, 12 months or longer 2,740 0
Unrealized losses, 12 months or longer (130) 0
Estimated fair value, total 136,291 11,953
Unrealized losses, total (2,823) (36)
US States and Political Subdivisions Debt Securities [Member]    
Estimated fair value, less than 12 months 133,340 1,864
Unrealized losses, less than 12 months (2,655) (2)
Estimated fair value, 12 months or longer 0 0
Unrealized losses, 12 months or longer 0 0
Estimated fair value, total 133,340 1,864
Unrealized losses, total (2,655) (2)
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 1,011 929
Unrealized losses, 12 months or longer (1,162) (1,253)
Estimated fair value, total 1,011 929
Unrealized losses, total $ (1,162) $ (1,253)