Note 2 - Acquisitions and Divestitures (Details Textual) - USD ($) $ in Thousands		12 Months Ended
	Sep. 16, 2022	Dec. 31, 2022	Dec. 31, 2021		Dec. 31, 2020	Dec. 31, 2023
Deposits, Total		$ 2,678,815	$ 2,729,391	[1]
Interest-Bearing Domestic Deposit, Demand		679,609	676,254
Interest-Bearing Domestic Deposit, Savings		578,974	561,576
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal		1,658	0		$ 0
Assets, Total		$ 3,135,572	$ 3,194,519	[1]
Forecast [Member] | Minimum [Member]
Assets, Total						$ 3,600,000
Disposal Group, Not Discontinued Operations [Member] | Emporia, Virginia Branch [Member] | Benchmark Community Bank [Member]
Disposal Group, Proceeds From Real Estate and Property	$ 1,500
Deposits, Total	61,050
Noninterest-Bearing Domestic Deposit, Demand	18,380
Interest-Bearing Domestic Deposit, Demand	28,460
Interest-Bearing Domestic Deposit, Savings	11,520
Interest-Bearing Domestic Deposit, Time Deposits, Total	2,690
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal	$ 1,660

[1] Derived from audited financial statements