CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (unaudited) - USD ($) $ in Thousands	Total	Common Stock	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Total Stockholders’ Equity	Noncontrolling Interest
Beginning balance (in shares) at Dec. 31, 2021		25,300,793
Beginning balance at Dec. 31, 2021	$ 704,906	$ 120,615	$ 583,134	$ 16,093	$ (15,025)	$ 704,817	$ 89
Net income	49,315		49,315			49,315
Other comprehensive income (loss), net of tax	(174,627)			(174,627)		(174,627)
Cash dividends declared and paid	(20,423)		(20,423)			(20,423)
Treasury shares purchased under deferred directors' plan (in shares)		(3,574)
Treasury shares purchased under deferred directors' plan	0	$ 285			(285)	0
Treasury shares sold and distributed under deferred directors' plan (in shares)		8,555
Treasury shares sold and distributed under deferred directors' plan	0	$ (221)			221	0
Stock activity under equity compensation plans (in shares)		39,388
Stock activity under equity compensation plans	(1,728)	$ (1,728)				(1,728)
Stock based compensation expense	4,620	$ 4,620				4,620
Ending balance (in shares) at Jun. 30, 2022		25,345,162
Ending balance at Jun. 30, 2022	562,063	$ 123,571	612,026	(158,534)	(15,089)	561,974	89
Beginning balance (in shares) at Mar. 31, 2022		25,346,149
Beginning balance at Mar. 31, 2022	609,102	$ 121,138	596,578	(93,687)	(15,016)	609,013	89
Net income	25,673		25,673			25,673
Other comprehensive income (loss), net of tax	(64,847)			(64,847)		(64,847)
Cash dividends declared and paid	(10,225)		(10,225)			(10,225)
Treasury shares purchased under deferred directors' plan (in shares)		(987)
Treasury shares purchased under deferred directors' plan	0	$ 73			(73)	0
Treasury shares sold and distributed under deferred directors' plan	0					0
Stock activity under equity compensation plans	0					0
Stock based compensation expense	2,360	$ 2,360				2,360
Ending balance (in shares) at Jun. 30, 2022		25,345,162
Ending balance at Jun. 30, 2022	$ 562,063	$ 123,571	612,026	(158,534)	(15,089)	561,974	89
Beginning balance (in shares) at Dec. 31, 2022	25,349,225	25,349,225
Beginning balance at Dec. 31, 2022	$ 568,887	$ 127,004	646,100	(188,923)	(15,383)	568,798	89
Net income	38,889		38,889			38,889
Other comprehensive income (loss), net of tax	11,278			11,278		11,278
Cash dividends declared and paid	(23,542)		(23,542)			(23,542)
Treasury shares purchased under deferred directors' plan (in shares)		(4,501)
Treasury shares purchased under deferred directors' plan	0	$ 285			(285)	0
Treasury shares sold and distributed under deferred directors' plan (in shares)		12,855
Treasury shares sold and distributed under deferred directors' plan	0	$ (405)			405	0
Stock activity under equity compensation plans (in shares)		71,637
Stock activity under equity compensation plans	(3,124)	$ (3,124)				(3,124)
Stock based compensation expense	$ (393)	$ (393)				(393)
Ending balance (in shares) at Jun. 30, 2023	25,429,216	25,429,216
Ending balance at Jun. 30, 2023	$ 591,995	$ 123,367	661,447	(177,645)	(15,263)	591,906	89
Beginning balance (in shares) at Mar. 31, 2023		25,430,917
Beginning balance at Mar. 31, 2023	602,006	$ 125,840	658,629	(167,370)	(15,182)	601,917	89
Net income	14,611		14,611			14,611
Other comprehensive income (loss), net of tax	(10,275)			(10,275)		(10,275)
Cash dividends declared and paid	(11,793)		(11,793)			(11,793)
Treasury shares purchased under deferred directors' plan (in shares)		(1,701)
Treasury shares purchased under deferred directors' plan	0	$ 81			(81)	0
Treasury shares sold and distributed under deferred directors' plan	0					0
Stock activity under equity compensation plans	0					0
Stock based compensation expense	$ (2,554)	$ (2,554)				(2,554)
Ending balance (in shares) at Jun. 30, 2023	25,429,216	25,429,216
Ending balance at Jun. 30, 2023	$ 591,995	$ 123,367	$ 661,447	$ (177,645)	$ (15,263)	$ 591,906	$ 89