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 earnings	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, 2022	506,224	316,803	46,144	546,703	(671)	(402,755)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	31,241
Changes in fair market value of derivatives, net of tax	1,209
Changes in unrealized pension cost, net of tax	(30)
Cumulative translation adjustment, net of tax	3,183
Ending Balance at Jun. 30, 2023	521,395	319,111	43,488	575,422	3,691	(420,317)
Beginning Balance at Mar. 31, 2023	514,136	318,785	42,423	563,787	698	(411,557)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	12,897			12,897
Changes in fair market value of derivatives, net of tax	830				830
Changes in unrealized pension cost, net of tax	4				4
Cumulative translation adjustment, net of tax	2,159				2,159
Cash dividends	(1,262)			(1,262)
Acquired shares for treasury stock	(8,760)					(8,760)
Issued shares on vesting of restricted stock units	(97)	326	(423)
Stock compensation	1,488		1,488
Ending Balance at Jun. 30, 2023	521,395	319,111	43,488	575,422	3,691	(420,317)
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 earnings	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)
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 earnings	25,826
Changes in fair market value of derivatives, net of tax	(944)
Changes in unrealized pension cost, net of tax	99
Cumulative translation adjustment, net of tax	(2,644)
Ending Balance at Jun. 30, 2024	522,751	321,894	41,586	625,614	775	(467,118)
Beginning Balance at Mar. 31, 2024	521,285	321,858	40,440	612,124	2,938	(456,075)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	14,707			14,707
Changes in fair market value of derivatives, net of tax	(1,675)				(1,675)
Changes in unrealized pension cost, net of tax	35				35
Cumulative translation adjustment, net of tax	(523)				(523)
Cash dividends	(1,217)			(1,217)
Acquired shares for treasury stock	(11,043)					(11,043)
Issued shares on vesting of restricted stock units	(13)	36	(49)
Stock compensation	1,195		1,195
Ending Balance at Jun. 30, 2024	$ 522,751	$ 321,894	$ 41,586	$ 625,614	$ 775	$ (467,118)