Consolidated 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, 2020	$ 361,259	$ 37,221		$ 44,964	$ 314,850	$ 1,313	$ (37,089)
Net earnings	60,884				60,884
Pension and postretirement benefits (net of tax effect)	339					339
Foreign currency translation	(1,516)					(1,516)
Cash dividends	(22,199)				(22,199)
Stock options exercised	2,036			1,622			414
Stock-based compensation	2,330			2,330
Purchase of common stock for treasury stock	(460)						(460)
Issuance of treasury stock	397			308			89
Balance at end of period at Dec. 31, 2021	403,070	37,221		49,224	353,535	136	(37,046)
Net earnings	66,496				66,496
Pension and postretirement benefits (net of tax effect)	600					600
Foreign currency translation	(6,719)					(6,719)
Cash dividends	(24,876)				(24,876)
Stock options exercised	703			581			122
Stock-based compensation	3,148			3,148
Purchase of common stock for treasury stock	(427)						(427)
Issuance of treasury stock	427			329			98
Balance at end of period at Dec. 31, 2022	442,422	37,221		53,282	395,155	(5,983)	(37,253)
Net earnings	92,598				92,598
Pension and postretirement benefits (net of tax effect)	(74)					(74)
Foreign currency translation	4,411					4,411
Cash dividends	(29,034)				(29,034)
Stock options exercised	967			824			143
Stock-based compensation	5,188			5,188
Issuance of treasury stock	4			(109)			113
Balance at end of period at Dec. 31, 2023	$ 516,482	$ 37,221		$ 59,185	$ 458,719	$ (1,646)	$ (36,997)

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