Note 3 - Loans and Allowance for Credit Losses - Components of Loan Portfolio (Details) - USD ($)		6 Months Ended
		Jun. 30, 2022	Dec. 31, 2021
Loans		$ 3,723,800,000	$ 3,453,459,000
Percent of portfolio		100.00%	100.00%
Period increase (decrease)		7.80%
Commercial Portfolio Segment [Member]
Loans		$ 3,071,760,000	$ 2,950,424,000
Percent of portfolio		82.50%	85.40%
Period increase (decrease)		4.10%
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Loans	[1]	$ 1,187,650,000	$ 1,137,419,000
Percent of portfolio	[1]	31.90%	32.90%
Period increase (decrease)	[1]	4.40%
Commercial Portfolio Segment [Member] | Vacant Land and Land Development and Residential Construction Loan [Member]
Loans		$ 57,808,000	$ 43,239,000
Percent of portfolio		1.60%	1.30%
Period increase (decrease)		33.70%
Commercial Portfolio Segment [Member] | Real Estate Owner Occupied Loan [Member]
Loans		$ 598,593,000	$ 565,758,000
Percent of portfolio		16.10%	16.40%
Period increase (decrease)		5.80%
Commercial Portfolio Segment [Member] | Real Estate Non Owner Occupied Loan [Member]
Loans		$ 1,003,118,000	$ 1,027,415,000
Percent of portfolio		26.90%	29.70%
Period increase (decrease)		(2.40%)
Commercial Portfolio Segment [Member] | Real Estate Multi Family and Residential Rental Loan [Member]
Loans		$ 224,591,000	$ 176,593,000
Percent of portfolio		6.00%	5.10%
Period increase (decrease)		27.20%
Retail Portfolio Segment [Member]
Loans		$ 652,040,000	$ 503,035,000
Percent of portfolio		17.50%	14.60%
Period increase (decrease)		29.60%
Retail Portfolio Segment [Member] | One to Four Family Mortgages [Member]
Loans		$ 623,599,000	$ 442,547,000
Percent of portfolio		16.70%	12.80%
Period increase (decrease)		40.90%
Retail Portfolio Segment [Member] | Other Consumer Loans [Member]
Loans	[2]	$ 28,441,000	$ 60,488,000
Percent of portfolio	[2]	0.80%	1.80%
Period increase (decrease)	[2]	(53.00%)

[1] For June 30, 2022, and December 31, 2021, includes $2.9 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 $33.3 million and $29.5 million as of June 30, 2022 and December 31, 2021, respectively.