Quarterly report pursuant to Section 13 or 15(d)

Note 2 - Securities (Details Textual)

v3.23.3
Note 2 - Securities (Details Textual)
3 Months Ended 9 Months Ended
Jan. 01, 2022
USD ($)
Sep. 30, 2023
USD ($)
Sep. 30, 2022
USD ($)
Sep. 30, 2023
USD ($)
Sep. 30, 2022
USD ($)
Dec. 31, 2022
USD ($)
Proceeds From Sale Of Securities   $ 0 $ 0 $ 0 $ 0  
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions   455   455   444
Debt Securities, Available-for-Sale, Unrealized Loss Position   $ 501,217,000   $ 501,217,000   $ 464,449,000
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss   $ 42,561,000   $ 42,561,000   $ 40,143,000
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions   81   81   76
Debt Securities, Held-to-Maturity, Unrealized Loss Position, Fair Value   $ 306,963,000   $ 306,963,000   $ 317,022,000
Debt Securities, Held-to-Maturity, Unrealized Loss Position, Accumulated Loss   15,600,000   15,600,000   16,530,000
Debt Securities, Available-for-Sale, Allowance for Credit Loss   0   0    
Asset Pledged as Collateral [Member] | Public Deposits Letters Of Credit And For Other Purposes [Member]            
Debt Securities   3,600,000   3,600,000   3,500,000
US Treasury Securities [Member]            
Number of Securities Reclassified 10          
Debt Securities, Available-for-Sale, Transfer to Held-to-Maturity, Amortized Cost $ 123,500,000          
Debt Securities, Available-for-Sale, Transfer to Held-to-Maturity, Unrealized Gain $ 113,000          
Debt Securities, Held-to-Maturity, Unrealized Loss Position, Fair Value   238,972,000   238,972,000   237,630,000
Debt Securities, Held-to-Maturity, Unrealized Loss Position, Accumulated Loss   $ 12,277,000   $ 12,277,000   $ 13,677,000