Segment Reporting (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Segment Reporting Information [Line Items]
Net Sales	$ 211,489	$ 215,734	$ 422,460	$ 423,532
Income from Operations	18,041	16,435	34,330	28,563
Goodwill	75,919		75,919		$ 75,509
Total Identifiable Assets	645,328		645,328		603,503
Industrial
Segment Reporting Information [Line Items]
Net Sales	117,146	118,521	240,424	235,433
Income from Operations	9,171	10,100	20,698	19,437
Goodwill	56,660		56,660		56,293
Total Identifiable Assets	370,278		370,278		370,642
Agricultural
Segment Reporting Information [Line Items]
Net Sales	51,845	52,981	100,507	101,438
Income from Operations	6,048	3,722	8,807	4,514
Goodwill	3,548		3,548		2,984
Total Identifiable Assets	132,894		132,894		110,489
European
Segment Reporting Information [Line Items]
Net Sales	42,498	44,232	81,529	86,661
Income from Operations	2,822	$ 2,613	4,825	$ 4,612
Goodwill	15,711		15,711		16,232
Total Identifiable Assets	$ 142,156		$ 142,156		$ 122,372