Note 2 - Loans and Allowance for Loan Losses - Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018
Loans, gross	$ 2,169,687	$ 2,093,042	$ 2,058,001
Net deferred loan fees	(7,675)	(7,141)
Total loans	2,162,012	2,085,901
Less: Allowance for loan losses	(30,281)	(28,726)	(28,280)	$ (27,174)
Net loans	2,131,731	2,057,175
Real Estate Portfolio Segment [Member]
Loans, gross	2,006,766	1,929,325
Real Estate Portfolio Segment [Member] \| Residential 1 to 4 Family [Member]
Loans, gross	519,775	511,250	458,304
Less: Allowance for loan losses	(7,351)	(7,144)	(6,565)	(6,297)
Real Estate Portfolio Segment [Member] \| Multifamily Real Estate [Member]
Loans, gross	151,929	97,104	136,385
Less: Allowance for loan losses	(1,641)	(1,117)	(1,500)	(1,481)
Real Estate Portfolio Segment [Member] \| Commercial Real Estate [Member]
Loans, gross	841,521	793,379	727,394
Less: Allowance for loan losses	(12,744)	(11,114)	(10,263)	(9,753)
Real Estate Portfolio Segment [Member] \| Construction Loans [Member]
Loans, gross	388,769	425,185	495,061
Less: Allowance for loan losses	(5,200)	(5,997)	(7,092)	(7,084)
Real Estate Portfolio Segment [Member] \| Farmland [Member]
Loans, gross	18,610	19,268	23,438
Less: Allowance for loan losses	(177)	(187)	(216)	(221)
Real Estate Portfolio Segment [Member] \| Second Mortgages [Member]
Loans, gross	11,254	10,760	11,465
Less: Allowance for loan losses	(127)	(123)	(121)	(118)
Real Estate Portfolio Segment [Member] \| Home Equity Line of Credit [Member]
Loans, gross	74,908	72,379	61,656
Less: Allowance for loan losses	(845)	(889)	(727)	(731)
Commercial Portfolio Segment [Member]
Loans, gross	95,547	98,265	77,921
Less: Allowance for loan losses	(998)	(1,044)	$ (785)	$ (622)
Agricultural Portfolio Segment [Member]
Loans, gross	1,487	1,569
Consumer Portfolio Segment [Member]
Loans, gross	55,960	54,834
Consumer Portfolio Segment [Member] \| Personal Loan [Member]
Loans, gross	51,961	50,532
Consumer Portfolio Segment [Member] \| Credit Card Receivable [Member]
Loans, gross	3,999	4,302
Unallocated Financing Receivables [Member]
Loans, gross	$ 9,927	$ 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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