Note 3 - Loans and Allowance for Credit Losses - Components of Loan Portfolio (Details) - USD ($)		9 Months Ended
		Sep. 30, 2022	Dec. 31, 2021
Loans		$ 3,880,958,000	$ 3,453,459,000
Percent of portfolio		100.00%	100.00%
Period increase (decrease)		12.40%
Commercial Portfolio Segment [Member]
Loans		$ 3,145,063,000	$ 2,950,424,000
Percent of portfolio		81.00%	85.40%
Period increase (decrease)		6.60%
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Loans	[1]	$ 1,213,630,000	$ 1,137,419,000
Percent of portfolio	[1]	31.30%	32.90%
Period increase (decrease)	[1]	6.70%
Commercial Portfolio Segment [Member] | Vacant Land and Land Development and Residential Construction Loan [Member]
Loans		$ 60,970,000	$ 43,239,000
Percent of portfolio		1.60%	1.30%
Period increase (decrease)		41.00%
Commercial Portfolio Segment [Member] | Real Estate Owner Occupied Loan [Member]
Loans		$ 643,577,000	$ 565,758,000
Percent of portfolio		16.60%	16.40%
Period increase (decrease)		13.80%
Commercial Portfolio Segment [Member] | Real Estate Non Owner Occupied Loan [Member]
Loans		$ 1,002,638,000	$ 1,027,415,000
Percent of portfolio		25.80%	29.70%
Period increase (decrease)		(2.40%)
Commercial Portfolio Segment [Member] | Real Estate Multi Family and Residential Rental Loan [Member]
Loans		$ 224,248,000	$ 176,593,000
Percent of portfolio		5.70%	5.10%
Period increase (decrease)		27.00%
Retail Portfolio Segment [Member]
Loans		$ 735,895,000	$ 503,035,000
Percent of portfolio		19.00%	14.60%
Period increase (decrease)		46.30%
Retail Portfolio Segment [Member] | One to Four Family Mortgages [Member]
Loans		$ 705,441,000	$ 442,547,000
Percent of portfolio		18.20%	12.80%
Period increase (decrease)		59.40%
Retail Portfolio Segment [Member] | Other Consumer Loans [Member]
Loans	[2]	$ 30,454,000	$ 60,488,000
Percent of portfolio	[2]	0.80%	1.80%
Period increase (decrease)	[2]	(49.70%)

[1] For September 30, 2022, and December 31, 2021, includes $2.6 million and $40.1 million in loans originated under the Paycheck Protection Program, respectively.

[2] In conjunction with the adoption of the CECL methodology effective January 1, 2022, home equity lines of credit were reclassified to 1-4 family mortgage loans from other consumer loans. Home equity lines of credit totaled $35.6 million and $29.5 million as of September 30, 2022 and December 31, 2021, respectively.