Consolidated Condensed Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock at $1 par value	[1]	Capital in excess of par value	Reinvested earnings	Accumulated other comprehensive income (loss)	Treasury stock (at cost)
Balance at beginning of period at Dec. 31, 2021	$ 403,070	$ 37,221		$ 49,224	$ 353,535	$ 136	$ (37,046)
Net Income (Loss)	48,957				48,957
Pension and postretirement benefits (net of tax effect)	(16)					(16)
Foreign currency translation	(13,104)					(13,104)
Cash dividends	(18,285)				(18,285)
Stock options exercised	61			50			11
Stock-based compensation	2,170			2,170
Purchase of common stock for treasury stock	(427)						(427)
Issuance of treasury stock	433			336			97
Balance at end of period at Sep. 30, 2022	422,859	37,221		51,780	384,207	(12,984)	(37,365)
Balance at beginning of period at Jun. 30, 2022	416,183	37,221		51,015	372,856	(7,544)	(37,365)
Net Income (Loss)	17,933				17,933
Pension and postretirement benefits (net of tax effect)	(16)					(16)
Foreign currency translation	(5,424)					(5,424)
Cash dividends	(6,582)				(6,582)
Stock options exercised	61			50			11
Stock-based compensation	704			704
Issuance of treasury stock				11			(11)
Balance at end of period at Sep. 30, 2022	422,859	37,221		51,780	384,207	(12,984)	(37,365)
Balance at beginning of period at Dec. 31, 2022	442,422	37,221		53,282	395,155	(5,983)	(37,253)
Net Income (Loss)	67,877				67,877
Pension and postretirement benefits (net of tax effect)	(103)					(103)
Foreign currency translation	(1,313)					(1,313)
Cash dividends	(21,110)				(21,110)
Stock options exercised	967			824			143
Stock-based compensation	3,963			3,963
Issuance of treasury stock	3			(107)			110
Balance at end of period at Sep. 30, 2023	492,706	37,221		57,962	441,922	(7,399)	(37,000)
Balance at beginning of period at Jun. 30, 2023	475,592	37,221		55,833	423,877	(4,203)	(37,136)
Net Income (Loss)	25,969				25,969
Pension and postretirement benefits (net of tax effect)	(38)					(38)
Foreign currency translation	(3,158)					(3,158)
Cash dividends	(7,924)				(7,924)
Stock options exercised	909			774			135
Stock-based compensation	1,356			1,356
Issuance of treasury stock				(1)			1
Balance at end of period at Sep. 30, 2023	$ 492,706	$ 37,221		$ 57,962	$ 441,922	$ (7,399)	$ (37,000)

[1] Each common share of stock equals $1 par value; therefore, the number of common shares is the same as the dollar value.