Note 2 - Loans and Allowance for Loan Losses - Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Loans, gross	$ 2,330,600	$ 2,093,042
Net deferred loan fees	(9,295)	(7,141)
Total loans	2,321,305	2,085,901
Less: Allowance for loan losses	(38,539)	(28,726)	$ (27,174)
Loans, net	2,282,766	2,057,175
Real Estate Portfolio Segment [Member]
Loans, gross	2,076,783	1,929,325
Real Estate Portfolio Segment [Member] \| Residential 1 to 4 Family [Member]
Loans, gross	535,994	511,250
Less: Allowance for loan losses	(8,098)	(7,144)	(6,297)
Real Estate Portfolio Segment [Member] \| Multifamily Real Estate [Member]
Loans, gross	111,646	97,104
Less: Allowance for loan losses	(1,541)	(1,117)	(1,481)
Real Estate Portfolio Segment [Member] \| Commercial Real Estate [Member]
Loans, gross	837,766	793,379
Less: Allowance for loan losses	(16,802)	(11,114)	(9,753)
Real Estate Portfolio Segment [Member] \| Construction Loans [Member]
Loans, gross	488,626	425,185
Less: Allowance for loan losses	(7,936)	(5,997)	(7,084)
Real Estate Portfolio Segment [Member] \| Farmland [Member]
Loans, gross	15,429	19,268
Less: Allowance for loan losses	(154)	(187)	(221)
Real Estate Portfolio Segment [Member] \| Second Mortgages [Member]
Loans, gross	8,433	10,760
Less: Allowance for loan losses	(105)	(123)	(118)
Real Estate Portfolio Segment [Member] \| Home Equity Line of Credit [Member]
Loans, gross	78,889	72,379
Less: Allowance for loan losses	(997)	(889)	(731)
Commercial Portfolio Segment [Member]
Loans, gross	172,811	98,265
Less: Allowance for loan losses	(1,378)	(1,044)	$ (622)
Agricultural Portfolio Segment [Member]
Loans, gross	1,206	1,569
Consumer Portfolio Segment [Member]
Loans, gross	70,517	54,834
Consumer Portfolio Segment [Member] \| Personal Loan [Member]
Loans, gross	66,193	50,532
Consumer Portfolio Segment [Member] \| Credit Card Receivable [Member]
Loans, gross	4,324	4,302
Unallocated Financing Receivables [Member]
Loans, gross	$ 9,283	$ 9,049

Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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