CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock, Common [Member]
Common stock, shares outstanding, beginning balance at Dec. 31, 2020		17,265,000
Stockholders' equity, beginning balance at Dec. 31, 2020	$ 534,195	$ 1,085	$ 125,610	$ 418,246	$ (7,391)	$ (3,355)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	76,870			76,870
Total other comprehensive income (loss), net of tax	(12,590)				(12,590)
Cash dividends declared	(36,806)			(36,806)
Share-based compensation	3,316		3,316
Exercise of stock options, issuance of other compensation-related equity awards, net of awards surrendered, shares		66,000
Exercise of stock options, issuance of other compensation-related equity awards, net of awards surrendered	(177)	$ 0	(2,415)			2,238
Common stock, shares outstanding, ending balance at Dec. 31, 2021		17,331,000
Stockholders' equity, ending balance at Dec. 31, 2021	564,808	$ 1,085	126,511	458,310	(19,981)	(1,117)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	71,681			71,681
Total other comprehensive income (loss), net of tax	(137,819)				(137,819)
Cash dividends declared	(37,948)			(37,948)
Share-based compensation	3,247		3,247
Exercise of stock options, issuance of other compensation-related equity awards, net of awards surrendered, shares		46,000
Exercise of stock options, issuance of other compensation-related equity awards, net of awards surrendered	(821)	$ 0	(2,702)			1,881
Treasury shares purchased, shares		(194,000)
Treasury stock purchased	$ (9,479)					(9,479)
Common stock, shares outstanding, ending balance at Dec. 31, 2022	17,182,753	17,183,000
Stockholders' equity, ending balance at Dec. 31, 2022	$ 453,669	$ 1,085	127,056	492,043	(157,800)	(8,715)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	48,176			48,176
Total other comprehensive income (loss), net of tax	16,647				16,647
Cash dividends declared	(38,302)			(38,302)
Share-based compensation	2,064		2,064
Exercise of stock options, issuance of other compensation-related equity awards, net of awards surrendered, shares		48,000
Exercise of stock options, issuance of other compensation-related equity awards, net of awards surrendered	(754)	$ 0	(2,970)			2,216
Treasury shares purchased, shares		(200,000)
Treasury stock purchased	$ (8,814)					(8,814)	[1]
Common stock, shares outstanding, ending balance at Dec. 31, 2023	17,030,987	17,031,000
Stockholders' equity, ending balance at Dec. 31, 2023	$ 472,686	$ 1,085	$ 126,150	$ 501,917	$ (141,153)	$ (15,313)

[1] Treasury stock includes $73 thousand of excise tax attributable to shares repurchased in 2023.