Consolidated Statements Of Changes In Shareholders' Equity - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Cumulative Effect, Period of Adoption, Adjusted Balance	Common Stock	Common Stock Cumulative Effect, Period of Adoption, Adjusted Balance	Capital Surplus	Capital Surplus Cumulative Effect, Period of Adoption, Adjusted Balance	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjusted Balance	Treasury Stock	Treasury Stock Cumulative Effect, Period of Adoption, Adjusted Balance	Accumulated Other Comprehensive (Loss) Income	Accumulated Other Comprehensive (Loss) Income Cumulative Effect, Period of Adoption, Adjusted Balance
Beginning balance at Dec. 31, 2021			$ 681,105		$ 47,619		$ 170,942		$ 641,826		$ (193,542)		$ 14,260
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 102,071			$ 0		$ 0		$ 102,071		$ 0		$ 0
Other comprehensive loss, net of tax	(145,748)			0		0		0		0		(145,748)
Cash dividends declared	(37,201)			0		0		(37,201)		0		0
Stock-based compensation expense, net	3,276					3,276
Restricted awards granted	$ 0			0		(2,821)		0		2,821		0
Exercise of stock options	15,000
Exercise of stock options	$ 798			0		(417)		0		1,215		0
Purchase of treasury shares	(26,449)									(26,449)
Ending balance at Dec. 31, 2022	577,852			47,619		170,980		706,696		(215,955)		(131,488)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture				0				0		0		0
Treasury Stock, Value, Acquired, Cost Method				0				0				0
Net income	114,365			0		0		114,365		0		0
Other comprehensive loss, net of tax	20,949			0		0		0		0		20,949
Cash dividends declared	(40,937)			0		0		(40,937)		0		0
Stock-based compensation expense, net	3,213					3,213
Restricted awards granted	0			0		(3,848)		0		3,848		0
Purchase of treasury shares	(60,134)									(60,134)
Stock Issued During Period, Value, Acquisitions	61,583			0		7,079		0		54,504		0
Ending balance at Dec. 31, 2023	677,066			47,619		177,424		780,299		(217,737)		(110,539)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture				0				0		0		0
Treasury Stock, Value, Acquired, Cost Method				0		0		0				0
Net income	117,101			0		0		117,101		0		0
Other comprehensive loss, net of tax	(5,180)			0		0		0		0		(5,180)
Cash dividends declared	(44,643)			0		0		(44,643)		0		0
Stock-based compensation expense, net	3,522					3,522
Restricted awards granted	$ 0			0		(4,030)		0		4,030		0
Exercise of stock options	11,074
Exercise of stock options	$ 694			0		(410)		0		1,104		0
Purchase of treasury shares	(17,896)									(17,896)
Ending balance at Dec. 31, 2024	$ 730,664	$ 175	$ 578,027	47,619	$ 47,619	176,506	$ 170,980	852,757	$ 706,871	(230,499)	$ (215,955)	(115,719)	$ (131,488)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture				0				0		$ 0		0
Treasury Stock, Value, Acquired, Cost Method				$ 0		$ 0		$ 0				$ 0