CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Total	Common Stock	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Noncontrolling Interest
Balance (in shares) at Dec. 31, 2020				25,239,748
Balance at Dec. 31, 2020	$ 657,184	$ (6,951)	$ 657,095	$ 114,927	$ 529,005	$ (6,951)	$ 27,744	$ (14,581)	$ 89
Increase (Decrease) in Stockholders' Equity
Net income	95,733		95,733		95,733
Other comprehensive income (loss), net of tax	(11,651)		(11,651)				(11,651)
Cash dividends declared	(34,653)		(34,653)		(34,653)
Treasury shares purchased under deferred directors' plan (in shares)				(8,820)
Treasury shares purchased under deferred directors' plan	0		0	$ 559				(559)
Treasury shares sold and distributed under deferred directors' plan (in shares)				5,664
Treasury shares sold and distributed under deferred directors’ plan	0		0	$ (115)				115
Stock activity under equity incentive plans (in shares)				64,201
Stock activity under equity incentive plans	(1,914)		(1,914)	$ (1,914)
Stock based compensation expense	7,158		7,158	$ 7,158
Balance (in shares) at Dec. 31, 2021				25,300,793
Balance at Dec. 31, 2021	704,906		704,817	$ 120,615	583,134		16,093	(15,025)	89
Increase (Decrease) in Stockholders' Equity
Net income	103,817		103,817		103,817
Other comprehensive income (loss), net of tax	(205,016)		(205,016)				(205,016)
Cash dividends declared	(40,851)		(40,851)		(40,851)
Treasury shares purchased under deferred directors' plan (in shares)				(7,641)
Treasury shares purchased under deferred directors' plan	0		0	$ 579				(579)
Treasury shares sold and distributed under deferred directors' plan (in shares)				8,555
Treasury shares sold and distributed under deferred directors’ plan	0		0	$ (221)				221
Stock activity under equity incentive plans (in shares)				47,518
Stock activity under equity incentive plans	(1,780)		(1,780)	$ (1,780)
Stock based compensation expense	7,811		7,811	$ 7,811
Balance (in shares) at Dec. 31, 2022				25,349,225
Balance at Dec. 31, 2022	568,887		568,798	$ 127,004	646,100		(188,923)	(15,383)	89
Increase (Decrease) in Stockholders' Equity
Net income	93,767		93,767		93,767
Other comprehensive income (loss), net of tax	33,728		33,728				33,728
Cash dividends declared	(47,107)		(47,107)		(47,107)
Treasury shares purchased under deferred directors' plan (in shares)				(10,073)
Treasury shares purchased under deferred directors' plan	0		0	$ 575				(575)
Treasury shares sold and distributed under deferred directors' plan (in shares)				12,855
Treasury shares sold and distributed under deferred directors’ plan	0		0	$ (405)				405
Stock activity under equity incentive plans (in shares)				78,559
Stock activity under equity incentive plans	(3,135)		(3,135)	$ (3,135)
Stock based compensation expense	3,653		3,653	$ 3,653
Balance (in shares) at Dec. 31, 2023				25,430,566
Balance at Dec. 31, 2023	$ 649,793		$ 649,704	$ 127,692	$ 692,760		$ (155,195)	$ (15,553)	$ 89