Revenue and Segment Information - Revenue, Income, Goodwill and Identifiable Assets by Location (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Segment Reporting Information [Line Items]
Net Sales	$ 338,311	$ 291,759	$ 997,050	$ 874,842
Income from Operations	30,043	30,923	89,071	77,440
Goodwill	193,572		193,572		$ 195,132
Total Identifiable Assets	1,217,778		1,217,778		1,121,859
Industrial
Segment Reporting Information [Line Items]
Net Sales	218,988	196,241	662,106	608,473
Income from Operations	15,951	19,238	52,004	51,453
Goodwill	180,094		180,094		181,338
Total Identifiable Assets	920,525		920,525		875,081
Agricultural
Segment Reporting Information [Line Items]
Net Sales	119,323	95,518	334,944	266,369
Income from Operations	14,092	$ 11,685	37,067	$ 25,987
Goodwill	13,478		13,478		13,794
Total Identifiable Assets	$ 297,253		$ 297,253		$ 246,778