Segment Reporting (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Segment Reporting Information [Line Items]
Net Sales	$ 215,389	$ 210,971
Income from Operations	20,101	16,289
Goodwill	75,298		$ 74,825
Total Identifiable Assets	635,139		552,776
Industrial
Segment Reporting Information [Line Items]
Net Sales	125,816	123,278
Income from Operations	12,463	11,527
Goodwill	56,496		56,447
Total Identifiable Assets	350,935		339,064
Agricultural
Segment Reporting Information [Line Items]
Net Sales	51,777	48,662
Income from Operations	4,816	2,759
Goodwill	3,648		3,489
Total Identifiable Assets	138,395		111,120
European
Segment Reporting Information [Line Items]
Net Sales	37,796	39,031
Income from Operations	2,822	$ 2,003
Goodwill	15,154		14,889
Total Identifiable Assets	$ 145,809		$ 102,592