CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - UNAUDITED - USD ($) $ in Thousands	Total	Common Stock	Additional Contributed Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock
Beginning Balance at Dec. 31, 2022	$ 506,224	$ 316,803	$ 46,144	$ 546,703	$ (671)	$ (402,755)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss)	18,344			18,344
Changes in fair market value of derivatives, net of tax	379				379
Changes in unrealized pension cost, net of tax	(34)				(34)
Cumulative translation adjustment, net of tax	1,024				1,024
Cash dividends	(1,260)			(1,260)
Acquired shares for treasury stock	(8,802)					(8,802)
Issued shares on vesting of restricted stock units	(3,143)	1,982	(5,125)
Stock compensation	1,404		1,404
Ending Balance at Mar. 31, 2023	514,136	318,785	42,423	563,787	698	(411,557)
Beginning Balance at Dec. 31, 2023	526,822	319,269	45,097	602,232	4,264	(444,040)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss)	11,119			11,119
Changes in fair market value of derivatives, net of tax	730				730
Changes in unrealized pension cost, net of tax	65				65
Cumulative translation adjustment, net of tax	(2,121)				(2,121)
Cash dividends	(1,227)			(1,227)
Acquired shares for treasury stock	(12,035)					(12,035)
Issued shares on vesting of restricted stock units	(3,116)	2,589	(5,705)
Stock compensation	1,048		1,048
Ending Balance at Mar. 31, 2024	$ 521,285	$ 321,858	$ 40,440	$ 612,124	$ 2,938	$ (456,075)