Segment Reporting (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($) segment	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Segment Reporting Information [Line Items]
Number of principal reporting segments | segment	3
Net Revenue	$ 844,748	$ 879,577	$ 839,055
Income from Operations	67,620	66,528	62,664
Goodwill	74,825	75,509	75,691	$ 32,073
Total Identifiable Assets	552,776	603,503
Industrial
Segment Reporting Information [Line Items]
Net Revenue	484,088	498,761	436,018
Income from Operations	35,984	42,194	39,377
Goodwill	56,447	56,293
Total Identifiable Assets	339,064	370,642
Agricultural
Segment Reporting Information [Line Items]
Net Revenue	205,834	208,257	214,326
Income from Operations	20,720	17,295	11,714
Goodwill	3,489	2,984
Total Identifiable Assets	111,120	110,489
European
Segment Reporting Information [Line Items]
Net Revenue	154,826	172,559	188,711
Income from Operations	10,916	7,039	$ 11,573
Goodwill	14,889	16,232
Total Identifiable Assets	$ 102,592	$ 122,372