Note 13 - Assets and Liabilities Measured and Reported at Fair Value - Assets Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Securities available-for-sale	$ 993,808	$ 1,031,179
Derivative	10,823	5,133
Rate Lock Loan Commitments [Member]
Derivative	452	174
Mandatory Forward Contract [Member]
Derivative	(41)	(43)
US Government-sponsored Enterprises Debt Securities [Member]
Securities available-for-sale	90,896	99,847
Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member]
Securities available-for-sale	660,620	688,039
US States and Political Subdivisions Debt Securities [Member]
Securities available-for-sale	121,257	123,490
Other Debt Obligations [Member]
Securities available-for-sale	3,557	3,534
Fair Value, Recurring [Member]
Securities available-for-sale	993,808	1,031,179
Mortgage loans held for sale	6,462	6,056
Interest rate swap assets	10,823	5,133
Total assets	1,011,545	1,042,542
Interest rate swap liabilities	7,743	5,378
Total liabilities	7,784	5,421
Fair Value, Recurring [Member] | Rate Lock Loan Commitments [Member]
Derivative	452	174
Fair Value, Recurring [Member] | Mandatory Forward Contract [Member]
Mandatory forward contracts	41	43
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Securities available-for-sale	117,478	116,269
Mortgage loans held for sale	0	0
Interest rate swap assets	0	0
Total assets	117,478	116,269
Interest rate swap liabilities	0	0
Total liabilities	0	0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Rate Lock Loan Commitments [Member]
Derivative	0	0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Mandatory Forward Contract [Member]
Mandatory forward contracts	0	0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Securities available-for-sale	876,330	914,910
Mortgage loans held for sale	6,462	6,056
Interest rate swap assets	10,823	5,133
Total assets	894,067	926,273
Interest rate swap liabilities	7,743	5,378
Total liabilities	7,784	5,421
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Rate Lock Loan Commitments [Member]
Derivative	452	174
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Mandatory Forward Contract [Member]
Mandatory forward contracts	41	43
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Securities available-for-sale	0	0
Mortgage loans held for sale	0	0
Interest rate swap assets	0	0
Total assets	0	0
Interest rate swap liabilities	0	0
Total liabilities	0	0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Rate Lock Loan Commitments [Member]
Derivative	0	0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Mandatory Forward Contract [Member]
Mandatory forward contracts	0	0
Fair Value, Recurring [Member] | US Treasury and Government [Member]
Securities available-for-sale	117,478	116,269
Fair Value, Recurring [Member] | US Treasury and Government [Member] | Fair Value, Inputs, Level 1 [Member]
Securities available-for-sale	117,478	116,269
Fair Value, Recurring [Member] | US Treasury and Government [Member] | Fair Value, Inputs, Level 2 [Member]
Securities available-for-sale	0	0
Fair Value, Recurring [Member] | US Treasury and Government [Member] | Fair Value, Inputs, Level 3 [Member]
Securities available-for-sale	0	0
Fair Value, Recurring [Member] | US Government-sponsored Enterprises Debt Securities [Member]
Securities available-for-sale	90,896	99,847
Fair Value, Recurring [Member] | US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Securities available-for-sale	0	0
Fair Value, Recurring [Member] | US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Securities available-for-sale	90,896	99,847
Fair Value, Recurring [Member] | US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Securities available-for-sale	0	0
Fair Value, Recurring [Member] | Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member]
Securities available-for-sale	660,620	688,039
Fair Value, Recurring [Member] | Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member] | Fair Value, Inputs, Level 1 [Member]
Securities available-for-sale	0	0
Fair Value, Recurring [Member] | Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member] | Fair Value, Inputs, Level 2 [Member]
Securities available-for-sale	660,620	688,039
Fair Value, Recurring [Member] | Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member] | Fair Value, Inputs, Level 3 [Member]
Securities available-for-sale	0	0
Fair Value, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member]
Securities available-for-sale	121,257	123,490
Fair Value, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Securities available-for-sale	0	0
Fair Value, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Securities available-for-sale	121,257	123,490
Fair Value, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Securities available-for-sale	0	0
Fair Value, Recurring [Member] | Other Debt Obligations [Member]
Securities available-for-sale	3,557	3,534
Fair Value, Recurring [Member] | Other Debt Obligations [Member] | Fair Value, Inputs, Level 1 [Member]
Securities available-for-sale	0	0
Fair Value, Recurring [Member] | Other Debt Obligations [Member] | Fair Value, Inputs, Level 2 [Member]
Securities available-for-sale	3,557	3,534
Fair Value, Recurring [Member] | Other Debt Obligations [Member] | Fair Value, Inputs, Level 3 [Member]
Securities available-for-sale	$ 0	$ 0