CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (unaudited) - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Cumulative Effect, Period of Adoption, Adjusted Balance	Total Stockholders’ Equity	Total Stockholders’ Equity Cumulative Effect, Period of Adoption, Adjustment	Total Stockholders’ Equity Cumulative Effect, Period of Adoption, Adjusted Balance	Common Stock	Common Stock Cumulative Effect, Period of Adoption, Adjusted Balance	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Retained Earnings Cumulative Effect, Period of Adoption, Adjusted Balance	Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) Cumulative Effect, Period of Adoption, Adjusted Balance	Treasury Stock	Treasury Stock Cumulative Effect, Period of Adoption, Adjusted Balance	Noncontrolling Interest	Noncontrolling Interest Cumulative Effect, Period of Adoption, Adjusted Balance
Beginning balance (in shares) at Dec. 31, 2023							25,430,566	25,430,566
Beginning balance at Dec. 31, 2023	$ 649,793	$ (532)	$ 649,261	$ 649,704	$ (532)	$ 649,172	$ 127,692	$ 127,692	$ 692,760	$ (532)	$ 692,228	$ (155,195)	$ (155,195)	$ (15,553)	$ (15,553)	$ 89	$ 89
Comprehensive income:
Net income	69,288			69,288					69,288
Other comprehensive income, net of tax	17,059			17,059								17,059
Cash dividends declared and paid	(36,966)			(36,966)					(36,966)
Treasury shares purchased under deferred directors' plan (in shares)							(8,088)
Treasury shares purchased under deferred directors' plan	0			0			$ 506							(506)
Treasury shares sold and distributed under deferred directors' plan (in shares)							13,275
Treasury shares sold and distributed under deferred directors' plan	0			0			$ (391)							391
Stock activity under equity compensation plans (in shares)							70,331
Stock activity under equity compensation plans	(2,596)			(2,596)			$ (2,596)
Stock based compensation expense	3,135			3,135			$ 3,135
Ending balance (in shares) at Sep. 30, 2024							25,506,084	25,506,084
Ending balance at Sep. 30, 2024	699,181		699,181	699,092		699,092	$ 128,346	$ 128,346	724,550		724,550	(138,136)	(138,136)	(15,668)	(15,668)	89	89
Beginning balance (in shares) at Jun. 30, 2024							25,503,744
Beginning balance at Jun. 30, 2024	654,590			654,501			$ 126,871		713,541			(170,458)		(15,453)		89
Comprehensive income:
Net income	23,338			23,338					23,338
Other comprehensive income, net of tax	32,322			32,322								32,322
Cash dividends declared and paid	(12,329)			(12,329)					(12,329)
Treasury shares purchased under deferred directors' plan (in shares)							(3,510)
Treasury shares purchased under deferred directors' plan	0			0			$ 215							(215)
Stock activity under equity compensation plans (in shares)							5,850
Stock activity under equity compensation plans	0			0			$ 0
Stock based compensation expense	1,260			1,260			$ 1,260
Ending balance (in shares) at Sep. 30, 2024							25,506,084	25,506,084
Ending balance at Sep. 30, 2024	$ 699,181		699,181	699,092		699,092	$ 128,346	$ 128,346	724,550		724,550	(138,136)	(138,136)	(15,668)	(15,668)	89	89
Beginning balance (in shares) at Dec. 31, 2024	25,509,592							25,509,592
Beginning balance at Dec. 31, 2024	$ 683,911		683,911			683,822		$ 129,664			736,412	(166,500)	(166,500)		(15,754)		89
Comprehensive income:
Net income	73,455			73,455					73,455
Other comprehensive income, net of tax	25,797			25,797								25,797
Cash dividends declared and paid	(38,576)			(38,576)					(38,576)
Treasury shares purchased under share repurchase plan (in shares)							(30,300)
Treasury shares purchased under share repurchase plan	(1,705)			(1,705)										(1,705)
Treasury shares purchased under deferred directors' plan (in shares)							(8,117)
Treasury shares purchased under deferred directors' plan	0			0			$ 524							(524)
Treasury shares sold and distributed under deferred directors' plan (in shares)							12,744
Treasury shares sold and distributed under deferred directors' plan	0			0			$ (375)							375
Stock activity under equity compensation plans (in shares)							44,813
Stock activity under equity compensation plans	(1,493)			(1,493)			$ (1,493)
Stock based compensation expense	$ 6,114			6,114			$ 6,114					0
Ending balance (in shares) at Sep. 30, 2025	25,528,732						25,528,732	25,528,732
Ending balance at Sep. 30, 2025	$ 747,503		747,503	747,414		747,414	$ 134,434	$ 134,434	771,291		771,291	(140,703)	(140,703)	(17,608)	(17,608)	89	89
Beginning balance (in shares) at Jun. 30, 2025							25,525,105
Beginning balance at Jun. 30, 2025	709,987			709,898			$ 130,664		757,739			(161,121)		(17,384)		89
Comprehensive income:
Net income	26,404			26,404					26,404
Other comprehensive income, net of tax	20,418			20,418								20,418
Cash dividends declared and paid	(12,852)			(12,852)					(12,852)
Treasury shares purchased under deferred directors' plan (in shares)							(3,523)
Treasury shares purchased under deferred directors' plan	0			0			$ 224							(224)
Stock activity under equity compensation plans (in shares)							7,150
Stock activity under equity compensation plans	0			0			$ 0
Stock based compensation expense	$ 3,546			3,546			$ 3,546
Ending balance (in shares) at Sep. 30, 2025	25,528,732						25,528,732	25,528,732
Ending balance at Sep. 30, 2025	$ 747,503		$ 747,503	$ 747,414		$ 747,414	$ 134,434	$ 134,434	$ 771,291		$ 771,291	$ (140,703)	$ (140,703)	$ (17,608)	$ (17,608)	$ 89	$ 89