Revenue and Segment Information - Revenue, Income, Goodwill and Identifiable Assets by Location (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Segment Reporting Information [Line Items]
Net Sales	$ 347,550	$ 268,635	$ 658,739	$ 583,083
Income from Operations	33,590	22,661	59,028	46,517
Goodwill	194,936		194,936		$ 195,132
Total Identifiable Assets	1,208,826		1,208,826		1,109,329
Industrial
Segment Reporting Information [Line Items]
Net Sales	231,207	182,257	443,118	412,232
Income from Operations	19,934	13,898	36,025	32,215
Goodwill	180,827		180,827		181,338
Total Identifiable Assets	917,336		917,336		868,688
Agricultural
Segment Reporting Information [Line Items]
Net Sales	116,343	86,378	215,621	170,851
Income from Operations	13,656	$ 8,763	23,003	$ 14,302
Goodwill	14,109		14,109		13,794
Total Identifiable Assets	$ 291,490		$ 291,490		$ 240,641