CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Total
Balance at beginning of period at Dec. 31, 2022	$ 122,000	$ 42,445,000	$ 543,875,000	$ (53,355,000)		$ 533,087,000
Net income			20,456,000			20,456,000
Stock issued under Stock Option Plan		425,000			$ 45,000	470,000
Common cash dividends declared			(4,854,000)			(4,854,000)
Change in fair value of cash flow hedges				5,029,000		5,029,000
Change in unrealized loss on held-to-maturity securities				(17,000)		(17,000)
Change in unrealized gain on available-for-sale securities				6,915,000		6,915,000
Purchase of the Company's common stock					(5,575,000)	(5,575,000)
Reclassification of treasury stock per Maryland law	(1,000)		(5,529,000)		5,530,000
Balance at ending of period at Mar. 31, 2023	121,000	42,870,000	553,948,000	(41,428,000)		555,511,000
Balance at beginning of period at Dec. 31, 2023	118,000	44,320,000	569,872,000	(42,481,000)		571,829,000
Net income			13,407,000			13,407,000
Stock issued under Stock Option Plan		487,000			205,000	692,000
Common cash dividends declared			(4,680,000)			(4,680,000)
Change in fair value of cash flow hedges				(4,532,000)		(4,532,000)
Change in unrealized loss on held-to-maturity securities				(36,000)		(36,000)
Change in unrealized gain on available-for-sale securities				(5,460,000)		(5,460,000)
Purchase of the Company's common stock					(5,835,000)	(5,835,000)
Reclassification of treasury stock per Maryland law	(1,000)		(5,629,000)		$ 5,630,000
Balance at ending of period (Accounting Standards Update 2023-02) at Mar. 31, 2024			(223,000)			(223,000)
Balance at ending of period at Mar. 31, 2024	$ 117,000	$ 44,807,000	$ 572,747,000	$ (52,509,000)		$ 565,162,000