CONSOLIDATED STATEMENTS OF EARNINGS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
CONSOLIDATED STATEMENTS OF EARNINGS [Abstract]
Revenue	$ 1,380,264	$ 1,332,001	$ 1,322,934
Cost of products sold	925,603	908,254	908,061
Selling and administrative expenses	284,633	271,091	293,763
Operating income	170,028	152,656	121,110
Interest expense	12,544	14,811	20,107
Earnings before income taxes	157,484	137,845	101,003
Income taxes	38,739	28,373	18,956
Net earnings	$ 118,745	$ 109,472	$ 82,047
Earnings per common share:
Basic (in dollars per share)	$ 2.82	$ 2.59	$ 1.94
Diluted (in dollars per share)	$ 2.81	$ 2.59	$ 1.94
Weighted average number of common shares outstanding:
Basic (in shares)	42,077	42,301	42,263
Diluted (in shares)	42,258	42,346	42,294