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 (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-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)
Stock option exercises				36,000			36,000
Balances at Mar. 31, 2022			0	286,831,000	181,532,000	(31,892,000)	436,471,000
Balances at Dec. 31, 2022			0	290,436,000	216,313,000	(65,341,000)	441,408,000
Employee stock purchase plan				10,000			10,000
Dividend reinvestment plan				217,000			217,000
Stock-based compensation expense				853,000			853,000
Cash dividends					(5,164,000)		(5,164,000)
Net income					20,974,000		20,974,000
Change in net unrealized holding gain/(loss) on securities available for sale, net of tax effect						9,074,000	9,074,000
Balances at Mar. 31, 2023			$ 0	$ 291,516,000	$ 232,123,000	$ (56,267,000)	$ 467,372,000