Condensed Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Stock
Beginning balance, shares at Dec. 31, 2023		29,511,721
Beginning balance at Dec. 31, 2023	$ 839,208	$ 157,784	$ 301,066	$ 474,691	$ (50,646)	$ (43,687)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	38,412			38,412
Other comprehensive (loss) income	(3,478)
Other comprehensive income, net of income tax	(3,478)
Cash dividends declared	(12,332)			(12,332)
Stock-based compensation	2,059		2,348	(289)
Stock issued under dividend reinvestment and employee stock purchase plans, shares		59,227
Stock issued under dividend reinvestment and employee stock purchase plans	1,268		12			1,256
Vesting of restricted stock unit awards, shares		107,377
Vesting of restricted stock units, net of shares withheld to cover taxes	(857)		(3,212)			2,355
Shares under option, exercised		19,788
Exercise of stock options	373		(48)			421
Purchases of treasury stock, shares		(507,473)
Purchases of treasury stock	(10,516)					(10,516)
Ending balance, shares at Jun. 30, 2024		29,190,640
Ending balance at Jun. 30, 2024	854,137	$ 157,784	300,166	500,482	(54,124)	(50,171)
Beginning balance, shares at Mar. 31, 2024		29,337,919
Beginning balance at Mar. 31, 2024	843,669	$ 157,784	298,914	488,790	(54,740)	(47,079)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	18,107			18,107
Other comprehensive (loss) income					616
Other comprehensive income, net of income tax	616
Cash dividends declared	(6,143)			(6,143)
Stock-based compensation	1,106		1,378	(272)
Stock issued under dividend reinvestment and employee stock purchase plans, shares		27,321
Stock issued under dividend reinvestment and employee stock purchase plans	620		17			603
Vesting of restricted stock unit awards, shares		4,208
Vesting of restricted stock units, net of shares withheld to cover taxes	(23)		(111)			88
Shares under option, exercised		12,000
Exercise of stock options	223		(32)			255
Purchases of treasury stock, shares		(190,808)
Purchases of treasury stock	(4,038)					(4,038)
Ending balance, shares at Jun. 30, 2024		29,190,640
Ending balance at Jun. 30, 2024	854,137	$ 157,784	300,166	500,482	(54,124)	(50,171)
Beginning balance, shares at Dec. 31, 2024		29,045,877
Beginning balance at Dec. 31, 2024	887,301	$ 157,784	302,829	525,780	(43,992)	(55,100)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	42,373			42,373
Other comprehensive (loss) income	9,023
Other comprehensive income, net of income tax	9,023
Cash dividends declared	(12,441)			(12,441)
Stock-based compensation	2,027		2,335	(308)
Stock issued under dividend reinvestment and employee stock purchase plans, shares		38,117
Stock issued under dividend reinvestment and employee stock purchase plans	1,149		98	(1)		1,052
Vesting of restricted stock unit awards, shares		108,328
Vesting of restricted stock units, net of shares withheld to cover taxes	$ (1,582)		(3,656)			2,074
Shares under option, exercised	13,000	13,000
Exercise of stock options	$ 323		34			289
Purchases of treasury stock, shares		(394,517)
Purchases of treasury stock	(11,440)					(11,440)
Ending balance, shares at Jun. 30, 2025		28,810,805
Ending balance at Jun. 30, 2025	916,733	$ 157,784	301,640	555,403	(34,969)	(63,125)
Beginning balance, shares at Mar. 31, 2025		28,962,648
Beginning balance at Mar. 31, 2025	903,472	$ 157,784	300,634	541,776	(37,922)	(58,800)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	19,978			19,978
Other comprehensive (loss) income					2,953
Other comprehensive income, net of income tax	2,953
Cash dividends declared	(6,353)			(6,353)
Stock-based compensation	968		965	3
Stock issued under dividend reinvestment and employee stock purchase plans, shares		18,981
Stock issued under dividend reinvestment and employee stock purchase plans	575		48	(1)		528
Vesting of restricted stock unit awards, shares		433
Vesting of restricted stock units, net of shares withheld to cover taxes	(7)		(15)			8
Shares under option, exercised		1,500
Exercise of stock options	43		8			35
Purchases of treasury stock, shares		(172,757)
Purchases of treasury stock	(4,896)					(4,896)
Ending balance, shares at Jun. 30, 2025		28,810,805
Ending balance at Jun. 30, 2025	$ 916,733	$ 157,784	$ 301,640	$ 555,403	$ (34,969)	$ (63,125)