Note 3 - Loans and Allowance for Credit Losses - Components of Loan Portfolio (Details) - USD ($)		9 Months Ended
		Sep. 30, 2023	Dec. 31, 2022
Loans		$ 4,104,376,000	$ 3,916,619,000
Percent of portfolio		100.00%	100.00%
Period increase (decrease)		4.80%
Commercial Portfolio Segment [Member]
Loans		$ 3,218,831,000	$ 3,131,830,000
Percent of portfolio		78.40%	80.00%
Period increase (decrease)		2.80%
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Loans		$ 1,166,187,000	$ 1,185,083,000
Percent of portfolio		28.40%	30.30%
Period increase (decrease)		(1.60%)
Commercial Portfolio Segment [Member] | Vacant Land and Land Development and Residential Construction Loan [Member]
Loans		$ 72,921,000	$ 61,873,000
Percent of portfolio		1.70%	1.60%
Period increase (decrease)		17.90%
Commercial Portfolio Segment [Member] | Real Estate Owner Occupied Loan [Member]
Loans		$ 671,083,000	$ 639,192,000
Percent of portfolio		16.40%	16.30%
Period increase (decrease)		5.00%
Commercial Portfolio Segment [Member] | Real Estate Non Owner Occupied Loan [Member]
Loans	[1]	$ 1,000,411,000	$ 979,214,000
Percent of portfolio		24.40%	25.00%
Period increase (decrease)		2.20%
Commercial Portfolio Segment [Member] | Real Estate Multi Family and Residential Rental Loan [Member]
Loans	[1]	$ 308,229,000	$ 266,468,000
Percent of portfolio		7.50%	6.80%
Period increase (decrease)		15.70%
Retail Portfolio Segment [Member]
Loans		$ 885,545,000	$ 784,789,000
Percent of portfolio		21.60%	20.00%
Period increase (decrease)		12.80%
Retail Portfolio Segment [Member] | One to Four Family Mortgages [Member]
Loans		$ 854,175,000	$ 755,036,000
Percent of portfolio		20.80%	19.30%
Period increase (decrease)		13.10%
Retail Portfolio Segment [Member] | Other Consumer Loans [Member]
Loans		$ 31,370,000	$ 29,753,000
Percent of portfolio		0.80%	0.70%
Period increase (decrease)		5.40%

[1] We have made certain reclassifications of how multi-family construction loans are disaggregated by loan segment. The table above reflects an increase of $54.5 million in Real Estate – Multi-Family and Residential Rental loans and a corresponding decrease in Real Estate – Non-Owner Occupied loans as of December 31, 2022. All the tables that follow have been adjusted to reflect the reclassifications as of the applicable dates.