Segment Reporting (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Segment Reporting Information [Line Items]
Net Revenue	$ 171,250	$ 158,429
Operating Income	10,631	9,739
Goodwill	31,980	30,870	32,073
Total Identifiable Assets	465,443	427,240	438,476
Industrial
Segment Reporting Information [Line Items]
Net Revenue	77,314	69,334
Operating Income	6,300	5,197
Goodwill	13,042	13,328
Total Identifiable Assets	171,722	149,005
Agricultural
Segment Reporting Information [Line Items]
Net Revenue	49,845	49,636
Operating Income	2,415	2,636
Goodwill	0	0
Total Identifiable Assets	151,253	134,790
European
Segment Reporting Information [Line Items]
Net Revenue	44,091	39,459
Operating Income	1,916	1,906
Goodwill	18,938	17,542
Total Identifiable Assets	$ 142,468	$ 143,445