Segment Reporting (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Segment Reporting Information [Line Items]
Net Sales	$ 233,175	$ 174,738	$ 610,778	$ 511,231
Income from Operations	21,526	15,326	46,953	42,626
Goodwill	71,996	32,073	71,996	32,073	32,073
Total Identifiable Assets	654,340	438,476	654,340	438,476	438,476
Industrial
Segment Reporting Information [Line Items]
Net Sales	125,952	71,890	308,348	218,863
Income from Operations	12,201	6,489	28,629	20,030
Goodwill	52,382	13,176	52,382	13,176
Total Identifiable Assets	376,852	161,080	376,852	161,080
Agricultural
Segment Reporting Information [Line Items]
Net Sales	57,668	61,157	160,144	168,048
Income from Operations	4,594	6,250	9,384	16,261
Goodwill	743	0	743	0
Total Identifiable Assets	116,361	123,352	116,361	123,352
European
Segment Reporting Information [Line Items]
Net Sales	49,555	41,691	142,286	124,320
Income from Operations	4,731	2,587	8,940	6,335
Goodwill	18,871	18,897	18,871	18,897
Total Identifiable Assets	$ 161,127	$ 154,044	$ 161,127	$ 154,044