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Note 2 - Loans and Allowance for Credit Losses - Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Dec. 31, 2020
Loans, gross	$ 3,005,284		$ 2,495,938
Net deferred loan fees	(13,959)		(12,024)
Total loans	2,991,325		2,483,914
Less: Allowance for credit losses	(37,580)	$ (35,238)	(39,632)	$ (39,311)	$ (39,314)	$ (38,539)
Net loans	2,953,745		2,444,282
Real Estate Portfolio Segment [Member] \| Residential 1 to 4 Family [Member]
Loans, gross	812,433		689,579
Total loans	812,433
Less: Allowance for credit losses	(6,995)	(6,291)	(9,242)	(8,881)	(8,540)	(8,203)
Real Estate Portfolio Segment [Member] \| Commercial and Multifamily [Member]
Loans, gross	993,647		908,673
Total loans	993,647
Less: Allowance for credit losses	(14,568)	(13,609)	(16,846)	(16,965)	(17,583)	(18,343)
Real Estate Portfolio Segment [Member] \| Construction, Land Development and Farmland [Member]
Loans, gross	853,326		612,659
Total loans	853,326
Less: Allowance for credit losses	(12,012)	(11,696)	(9,757)	(9,855)	(9,353)	(8,090)
Real Estate Portfolio Segment [Member] \| Home Equity Loan [Member]
Loans, gross	142,043		92,229
Total loans	142,043
Less: Allowance for credit losses	(1,086)	(916)	(1,098)	(1,050)	(1,048)	(997)
Commercial, Industrial and Agricultural Portfolio [Member]
Loans, gross	124,115		118,155
Total loans	124,115
Less: Allowance for credit losses	(1,672)	(1,542)	(1,329)	(1,273)	(1,294)	(1,391)
Consumer Portfolio Segment [Member]
Loans, gross	79,720		74,643
Total loans	79,720
Less: Allowance for credit losses	$ (1,247)	$ (1,184)	$ (1,360)	$ (1,287)	$ (1,496)	$ (1,515)