CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Common Stock [Member]	Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss)	Treasury Stock [Member]
Common stock, shares outstanding at Dec. 31, 2023		17,031,000
Shareholders' equity at Dec. 31, 2023	$ 472,686	$ 1,085	$ 126,150	$ 501,917	$ (141,153)	$ (15,313)
Net income	32,732			32,732
Total other comprehensive income (loss), net of tax	23,995				23,995
Cash dividends declared	(28,995)			(28,995)
Share-based compensation	2,078		2,078
Exercise of stock options and issuance of other compensation-related equity awards, net of awards surrendered, shares		27,000
Exercise of stock options and issuance of other compensation-related equity awards, net of awards surrendered, value	(267)	$ 0	(1,530)			1,263
Common stock, shares outstanding at Sep. 30, 2024		17,058,000
Shareholders' equity at Sep. 30, 2024	502,229	$ 1,085	126,698	505,654	(117,158)	(14,050)
Common stock, shares outstanding at Jun. 30, 2024		17,058,000
Shareholders' equity at Jun. 30, 2024	470,957	$ 1,085	125,898	504,350	(146,326)	(14,050)
Net income	10,981			10,981
Total other comprehensive income (loss), net of tax	29,168				29,168
Cash dividends declared	(9,677)			(9,677)
Share-based compensation	800		800
Common stock, shares outstanding at Sep. 30, 2024		17,058,000
Shareholders' equity at Sep. 30, 2024	$ 502,229	$ 1,085	126,698	505,654	(117,158)	(14,050)
Common stock, shares outstanding at Dec. 31, 2024	19,273,583	19,274,000
Shareholders' equity at Dec. 31, 2024	$ 499,728	$ 1,223	196,947	434,014	(119,171)	(13,285)
Net income	36,270			36,270
Total other comprehensive income (loss), net of tax	34,343				34,343
Cash dividends declared	(32,739)			(32,739)
Share-based compensation	2,486		2,486
Exercise of stock options and issuance of other compensation-related equity awards, net of awards surrendered, shares		23,000
Exercise of stock options and issuance of other compensation-related equity awards, net of awards surrendered, value	(335)	$ 0	(1,375)			1,040
Treasury stock purchased under Stock Repurchase Program, amount acquired	$ (6,732)					(6,732)
Treasury stock repurchased	(246,803)	(247,000)
Common stock, shares outstanding at Sep. 30, 2025	19,050,016	19,050,000
Shareholders' equity at Sep. 30, 2025	$ 533,021	$ 1,223	198,058	437,545	(84,828)	(18,977)
Common stock, shares outstanding at Jun. 30, 2025		19,283,000
Shareholders' equity at Jun. 30, 2025	527,519	$ 1,223	197,392	437,520	(95,949)	(12,667)
Net income	10,846			10,846
Total other comprehensive income (loss), net of tax	11,121				11,121
Cash dividends declared	(10,821)			(10,821)
Share-based compensation	833		833
Exercise of stock options and issuance of other compensation-related equity awards, net of awards surrendered, shares		4,000
Exercise of stock options and issuance of other compensation-related equity awards, net of awards surrendered, value	(41)	$ 0	(167)			126
Treasury stock purchased under Stock Repurchase Program, amount acquired	$ (6,436)					(6,436)
Treasury stock repurchased		(237,000)
Common stock, shares outstanding at Sep. 30, 2025	19,050,016	19,050,000
Shareholders' equity at Sep. 30, 2025	$ 533,021	$ 1,223	$ 198,058	$ 437,545	$ (84,828)	$ (18,977)