Consolidated Statements of Changes in Shareholders' Equity (Unaudited) - USD ($)	Cumulative Effect, Period of Adoption, Adjustment [Member] Retained Earnings [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member]	Preferred Stock [Member]	Common Stock Including Additional Paid in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balances at Dec. 31, 2020			$ 0	$ 302,029,000	$ 134,039,000	$ 5,486,000	$ 441,554,000
Employee stock purchase plan				11,000			11,000
Dividend reinvestment plan				213,000			213,000
Stock-based compensation expense				643,000			643,000
Cash dividends					(4,636,000)		(4,636,000)
Net income					14,239,000		14,239,000
Change in net unrealized holding gain/(loss) on securities available for sale, net of tax effect						(7,243,000)	(7,243,000)
Share repurchase program				(3,538,000)			(3,538,000)
Balances at Mar. 31, 2021			0	299,358,000	143,642,000	(1,757,000)	441,243,000
Balances (Accounting Standards Update 2016-13 [Member]) at Dec. 31, 2021	$ 316,000	$ 316,000
Balances at Dec. 31, 2021			0	285,752,000	174,536,000	(3,729,000)	456,559,000
Employee stock purchase plan				10,000			10,000
Dividend reinvestment plan				222,000			222,000
Stock option exercises				36,000			36,000
Stock-based compensation expense				811,000			811,000
Cash dividends					(4,812,000)		(4,812,000)
Net income					11,492,000		11,492,000
Change in net unrealized holding gain/(loss) on securities available for sale, net of tax effect						(28,163,000)	(28,163,000)
Balances at Mar. 31, 2022			$ 0	$ 286,831,000	$ 181,532,000	$ (31,892,000)	$ 436,471,000