Note 2 - Loans and Allowance for Loan Losses - Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Loans, gross	$ 2,093,042	$ 2,050,199
Net deferred loan fees	(7,141)	(7,020)
Total loans	2,085,901	2,043,179
Less: Allowance for loan losses	(28,726)	(27,174)	$ (23,909)
Loans, net	2,057,175	2,016,005
Real Estate Portfolio Segment [Member]
Loans, gross	1,929,325	1,911,886
Real Estate Portfolio Segment [Member] \| Residential 1 to 4 Family [Member]
Loans, gross	511,250	460,692
Less: Allowance for loan losses	(7,144)	(6,297)	(5,156)
Real Estate Portfolio Segment [Member] \| Multifamily Real Estate [Member]
Loans, gross	97,104	134,613
Less: Allowance for loan losses	(1,117)	(1,481)	(1,011)
Real Estate Portfolio Segment [Member] \| Commercial Real Estate [Member]
Loans, gross	793,379	701,055
Less: Allowance for loan losses	(11,114)	(9,753)	(9,267)
Real Estate Portfolio Segment [Member] \| Construction Loans [Member]
Loans, gross	425,185	518,245
Less: Allowance for loan losses	(5,997)	(7,084)	(6,094)
Real Estate Portfolio Segment [Member] \| Farmland [Member]
Loans, gross	19,268	24,071
Less: Allowance for loan losses	(187)	(221)	(487)
Real Estate Portfolio Segment [Member] \| Second Mortgages [Member]
Loans, gross	10,760	11,197
Less: Allowance for loan losses	(123)	(118)	(94)
Real Estate Portfolio Segment [Member] \| Home Equity Line of Credit [Member]
Loans, gross	72,379	62,013
Less: Allowance for loan losses	(889)	(731)	(723)
Commercial Portfolio Segment [Member]
Loans, gross	98,265	78,245
Less: Allowance for loan losses	(1,044)	(622)	$ (401)
Agricultural Portfolio Segment [Member]
Loans, gross	1,569	1,985
Consumer Portfolio Segment [Member]
Loans, gross	54,834	48,759
Consumer Portfolio Segment [Member] \| Personal Loan [Member]
Loans, gross	50,532	45,072
Consumer Portfolio Segment [Member] \| Credit Card Receivable [Member]
Loans, gross	4,302	3,687
Unallocated Financing Receivables [Member]
Loans, gross	$ 9,049	$ 9,324

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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