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 earnings	14,360				14,360
Foreign currency translation	(2,315)					(2,315)
Cash dividends	(5,849)				(5,849)
Stock-based compensation	615			615
Issuance of treasury stock				(81)			81
Balance at end of period at Mar. 31, 2022	409,881	37,221		49,758	362,046	(2,179)	(36,965)
Balance at beginning of period at Dec. 31, 2022	442,422	37,221		53,282	395,155	(5,983)	(37,253)
Net earnings	19,415				19,415
Pension and postretirement benefits (net of $(1) tax effect)	(33)					(33)
Foreign currency translation	1,758					1,758
Cash dividends	(6,591)				(6,591)
Stock options exercised	58			50			8
Stock-based compensation	1,006			1,006
Issuance of treasury stock	2			(93)			95
Balance at end of period at Mar. 31, 2023	$ 458,037	$ 37,221		$ 54,245	$ 407,979	$ (4,258)	$ (37,150)

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