Segment Reporting (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Segment Reporting Information [Line Items]
Net Sales	$ 231,614	$ 234,783	$ 655,146	$ 615,144
Income from Operations	23,570	21,526	52,133	46,953
Goodwill	76,082		76,082		$ 75,691
Total Identifiable Assets	644,922		644,922		632,886
Industrial
Segment Reporting Information [Line Items]
Net Sales	127,385	126,356	362,818	309,543
Income from Operations	11,741	12,201	31,178	28,629
Goodwill	56,498		56,498		57,320
Total Identifiable Assets	385,522		385,522		367,096
Agricultural
Segment Reporting Information [Line Items]
Net Sales	58,919	58,872	160,357	163,315
Income from Operations	7,778	4,594	12,292	9,384
Goodwill	2,963		2,963		695
Total Identifiable Assets	109,325		109,325		113,286
European
Segment Reporting Information [Line Items]
Net Sales	45,310	49,555	131,971	142,286
Income from Operations	4,051	$ 4,731	8,663	$ 8,940
Goodwill	16,621		16,621		17,676
Total Identifiable Assets	$ 150,075		$ 150,075		$ 152,504