Quarterly report pursuant to Section 13 or 15(d)

Note 4 - Securities - Securities with Gross Unrealized Losses Not Recognized in Income (Details)

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Note 4 - Securities - Securities with Gross Unrealized Losses Not Recognized in Income (Details)
$ in Thousands
Sep. 30, 2019
USD ($)
Dec. 31, 2018
USD ($)
Estimated fair value, less than 12 months $ 9,733 $ 51,066
Unrealized losses, less than 12 months (76) (671)
Estimated fair value, 12 months or longer 19,421 98,644
Unrealized losses, 12 months or longer (1,449) (4,104)
Estimated fair value, total 29,154 149,710
Unrealized losses, total $ (1,525) $ (4,775)
Unrealized losses, less than 12 months, number of securities 8 52
Unrealized losses, 12 months or longer, number of securities 19 75
Unrealized losses, total, number of securities 27 127
US Government-sponsored Enterprises Debt Securities [Member]    
Estimated fair value, less than 12 months $ 1,427
Unrealized losses, less than 12 months (3)
Estimated fair value, 12 months or longer 3,866
Unrealized losses, 12 months or longer (131)
Estimated fair value, total 1,427 3,866
Unrealized losses, total (3) (131)
Collateralized Mortgage Obligations and Residential Mortgage Backed Securities [Member]    
Estimated fair value, less than 12 months 5,727 28,388
Unrealized losses, less than 12 months (34) (304)
Estimated fair value, 12 months or longer 17,351 89,234
Unrealized losses, 12 months or longer (71) (2,384)
Estimated fair value, total 23,078 117,622
Unrealized losses, total (105) (2,688)
US States and Political Subdivisions Debt Securities [Member]    
Estimated fair value, less than 12 months 2,579 22,678
Unrealized losses, less than 12 months (39) (367)
Estimated fair value, 12 months or longer 3,495
Unrealized losses, 12 months or longer (157)
Estimated fair value, total 2,579 26,173
Unrealized losses, total (39) (524)
Collateralized Debt Obligations [Member]    
Estimated fair value, less than 12 months
Unrealized losses, less than 12 months
Estimated fair value, 12 months or longer 2,070 2,049
Unrealized losses, 12 months or longer (1,378) (1,432)
Estimated fair value, total 2,070 2,049
Unrealized losses, total $ (1,378) $ (1,432)