Quarterly report [Sections 13 or 15(d)]

Note 4 - Securities - Investment Securities Continuous Unrealized Loss Position (Details)

v3.25.1
Note 4 - Securities - Investment Securities Continuous Unrealized Loss Position (Details) - USD ($)
$ in Thousands
Mar. 31, 2025
Dec. 31, 2024
Debt securities available for sale, less than twelve months, gross unrealized losses $ (416) $ (1,758)
Debt securities available for sale, less than twelve months, fair value 48,968 276,720
Debt Securities Available for Sale, Twelve Months or More, Gross Unrealized Losses (38,309) (44,570)
Debt Securities, Available for Sale, Twelve Months or More, Fair Value 468,986 472,739
Debt Securities, Available for Sale, Gross Unrealized Losses (38,725) (46,328)
Debt Securities, Available for Sale, Fair Value 517,954 749,459
State and municipal securities (38,309) (44,570)
State and municipal securities (38,725) (46,328)
U.S. Treasury securities (194) (536)
U.S. Treasury securities 27,978 40,115
U.S. Treasury securities (62,173) (74,835)
U.S. Treasury securities 593,504 593,233
U.S. Treasury securities (62,367) (75,371)
U.S. Treasury securities 621,482 633,348
U.S. Treasury securities (416) (1,758)
U.S. Treasury securities 48,968 276,720
US Treasury Securities [Member]    
Debt securities available for sale, less than twelve months, gross unrealized losses (2) (445)
Debt securities available for sale, less than twelve months, fair value 29,490 250,547
Debt Securities Available for Sale, Twelve Months or More, Gross Unrealized Losses 0 0
Debt Securities, Available for Sale, Twelve Months or More, Fair Value 0 0
Debt Securities, Available for Sale, Gross Unrealized Losses (2) (445)
Debt Securities, Available for Sale, Fair Value 29,490 250,547
State and municipal securities 0 0
State and municipal securities (2) (445)
U.S. Treasury securities 0 0
U.S. Treasury securities 0 0
U.S. Treasury securities (15,765) (19,632)
U.S. Treasury securities 233,692 229,771
U.S. Treasury securities (15,765) (19,632)
U.S. Treasury securities 233,692 229,771
U.S. Treasury securities (2) (445)
U.S. Treasury securities 29,490 250,547
Collateralized Mortgage-Backed Securities [Member]    
Debt securities available for sale, less than twelve months, gross unrealized losses (1) (6)
Debt securities available for sale, less than twelve months, fair value 351 577
Debt Securities Available for Sale, Twelve Months or More, Gross Unrealized Losses (20,067) (24,204)
Debt Securities, Available for Sale, Twelve Months or More, Fair Value 174,934 179,178
Debt Securities, Available for Sale, Gross Unrealized Losses (20,068) (24,210)
Debt Securities, Available for Sale, Fair Value 175,285 179,755
State and municipal securities (20,067) (24,204)
State and municipal securities (20,068) (24,210)
U.S. Treasury securities (194) (536)
U.S. Treasury securities 27,978 40,115
U.S. Treasury securities (45,911) (54,614)
U.S. Treasury securities 352,468 356,215
U.S. Treasury securities (46,105) (55,150)
U.S. Treasury securities 380,446 396,330
U.S. Treasury securities (1) (6)
U.S. Treasury securities 351 577
US States and Political Subdivisions Debt Securities [Member]    
Debt securities available for sale, less than twelve months, gross unrealized losses 0 0
Debt securities available for sale, less than twelve months, fair value 0 0
Debt Securities Available for Sale, Twelve Months or More, Gross Unrealized Losses (830) (1,000)
Debt Securities, Available for Sale, Twelve Months or More, Fair Value 9,240 9,072
Debt Securities, Available for Sale, Gross Unrealized Losses (830) (1,000)
Debt Securities, Available for Sale, Fair Value 9,240 9,072
State and municipal securities (830) (1,000)
State and municipal securities (830) (1,000)
U.S. Treasury securities 0 0
U.S. Treasury securities 0 0
U.S. Treasury securities (497) (589)
U.S. Treasury securities 7,344 7,247
U.S. Treasury securities (497) (589)
U.S. Treasury securities 7,344 7,247
U.S. Treasury securities 0 0
U.S. Treasury securities 0 0
Corporate Debt Securities [Member]    
Debt securities available for sale, less than twelve months, gross unrealized losses (413) (1,307)
Debt securities available for sale, less than twelve months, fair value 19,127 25,596
Debt Securities Available for Sale, Twelve Months or More, Gross Unrealized Losses (17,412) (19,366)
Debt Securities, Available for Sale, Twelve Months or More, Fair Value 284,812 284,489
Debt Securities, Available for Sale, Gross Unrealized Losses (17,825) (20,673)
Debt Securities, Available for Sale, Fair Value 303,939 310,085
State and municipal securities (17,412) (19,366)
State and municipal securities (17,825) (20,673)
U.S. Treasury securities (413) (1,307)
U.S. Treasury securities $ 19,127 $ 25,596