CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($)	Common Stock	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total
Balance at Dec. 31, 2021	$ 245,000	$ 311,127,000	$ 97,631,000	$ 1,112,000	$ 410,115,000
Balance, shares at Dec. 31, 2021	24,574,619
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income			9,484,000		9,484,000
Changes in other comprehensive income (loss) on investment securities, net of tax				(19,038,000)	(19,038,000)
Dividends on common stock			(4,922,000)		(4,922,000)
Shares retired to unallocated	(538)
Stock option exercises	$ 1,000	278,000			279,000
Stock option exercises (in shares)	27,500
Restricted stock granted	1,500
Repurchase of restricted stock		(8,000)			(8,000)
Stock-based compensation expense		843,000			843,000
Shares issued in lieu of cash bonus, shares	47,158
Balance at Jun. 30, 2022	$ 246,000	312,240,000	102,193,000	(17,926,000)	396,753,000
Balance, shares, ending at Jun. 30, 2022	24,650,239
Balance at Mar. 31, 2022	$ 245,000	311,872,000	99,710,000	(9,455,000)	402,372,000
Balance, shares at Mar. 31, 2022	24,622,739
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	$ 0	0	4,948,000	0	4,948,000
Changes in other comprehensive income (loss) on investment securities, net of tax	0	0	0	(8,471,000)	(8,471,000)
Dividends on common stock	0	0	(2,465,000)	0	(2,465,000)
Stock option exercises	$ 1,000	278,000	0	0	279,000
Stock option exercises (in shares)	27,500
Repurchase of restricted stock	$ 0	(2,000)	0	0	(2,000)
Stock-based compensation expense	0	92,000	0	0	92,000
Balance at Jun. 30, 2022	$ 246,000	312,240,000	102,193,000	(17,926,000)	396,753,000
Balance, shares, ending at Jun. 30, 2022	24,650,239
Balance at Dec. 31, 2022	$ 246,000	312,722,000	105,247,000	(25,850,000)	$ 392,365,000
Balance, shares at Dec. 31, 2022	24,680,097				24,680,097
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income			5,765,000		$ 5,765,000
Changes in other comprehensive income (loss) on investment securities, net of tax				(231,000)	(231,000)
Dividends on common stock			(4,937,000)		(4,937,000)
Shares retired to unallocated	(1,033)
Stock option exercises	$ 8,000	85,000			85,000
Restricted stock granted	5,000
Restricted stock forfeited	(2,000)
Repurchase of restricted stock		(12,000)			(12,000)
Stock-based compensation expense		181,000			181,000
Balance at Jun. 30, 2023	$ 246,000	312,976,000	106,075,000	(26,081,000)	$ 393,216,000
Balance, shares, ending at Jun. 30, 2023	24,690,064				24,690,064
Balance at Mar. 31, 2023	$ 246,000	312,903,000	108,732,000	(23,475,000)	$ 398,406,000
Balance, shares at Mar. 31, 2023	24,685,064
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	$ 0	0	(188,000)	0	(188,000)
Changes in other comprehensive income (loss) on investment securities, net of tax	0	0	0	(2,606,000)	(2,606,000)
Dividends on common stock	$ 0	0	(2,469,000)	0	(2,469,000)
Restricted stock granted	5,000
Stock-based compensation expense	$ 0	73,000	0	0	73,000
Balance at Jun. 30, 2023	$ 246,000	$ 312,976,000	$ 106,075,000	$ (26,081,000)	$ 393,216,000
Balance, shares, ending at Jun. 30, 2023	24,690,064				24,690,064