Note 3 - Loans and Allowance for Credit Losses - Components of Loan Portfolio (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2026	Dec. 31, 2025
Loans	$ 4,915,553	$ 4,821,888
Percent of portfolio	100.00%	100.00%
Period increase (decrease)	1.90%
Commercial Portfolio Segment [Member]
Loans	$ 4,050,396	$ 3,918,662
Percent of portfolio	82.40%	81.30%
Period increase (decrease)	3.40%
Commercial Portfolio Segment [Member] \| Commercial and Industrial [Member]
Loans	$ 1,537,029	$ 1,374,522
Percent of portfolio	31.30%	28.50%
Period increase (decrease)	11.80%
Commercial Portfolio Segment [Member] \| Vacant Land and Land Development and Residential Construction Loan [Member]
Loans	$ 119,387	$ 117,373
Percent of portfolio	2.40%	2.40%
Period increase (decrease)	1.70%
Commercial Portfolio Segment [Member] \| Real Estate Owner Occupied Loan [Member]
Loans	$ 803,883	$ 778,869
Percent of portfolio	16.40%	16.20%
Period increase (decrease)	3.20%
Commercial Portfolio Segment [Member] \| Real Estate Non Owner Occupied Loan [Member]
Loans	$ 1,091,844	$ 1,110,674
Percent of portfolio	22.20%	23.00%
Period increase (decrease)	(1.70%)
Commercial Portfolio Segment [Member] \| Real Estate Multi Family and Residential Rental Loan [Member]
Loans	$ 498,253	$ 537,224
Percent of portfolio	10.10%	11.20%
Period increase (decrease)	(7.30%)
Retail Portfolio Segment [Member]
Loans	$ 865,157	$ 903,226
Percent of portfolio	17.60%	18.70%
Period increase (decrease)	(4.20%)
Retail Portfolio Segment [Member] \| One to Four Family Mortgages [Member]
Loans	$ 750,526	$ 790,857
Percent of portfolio	15.30%	16.40%
Period increase (decrease)	(5.10%)
Retail Portfolio Segment [Member] \| Other Consumer Loans [Member]
Loans	$ 114,631	$ 112,369
Percent of portfolio	2.30%	2.30%
Period increase (decrease)	2.00%