Acquisitions and Investments (Narrative) (Details) - USD ($)			3 Months Ended	8 Months Ended
	Mar. 09, 2015	May. 13, 2014	Jun. 30, 2015	Dec. 31, 2014	Dec. 31, 2015	May. 12, 2014	Dec. 31, 2013	Dec. 31, 2012
Business Acquisition [Line Items]
Goodwill				$ 75,691,000	$ 75,509,000		$ 32,073,000	$ 31,648,000
Industrial
Business Acquisition [Line Items]
Goodwill				57,320,000	56,293,000
Herder Implementos e Maquinas Agricolas Ltda [Member]
Business Acquisition [Line Items]
Total consideration transferred	$ 4,000,000
Specialized Industries LP
Business Acquisition [Line Items]
Total consideration transferred		$ 193,000,000
Period for post closing adjustments		90 days
New borrowings under the amended credit facility		$ 190,000,000
Purchase price allocation adjustment for unrecognized deferred tax liability related to intangible assets			$ 3,300,000
Increase in goodwill, adjustment to purchase price allocation			$ 3,300,000
Goodwill		44,611,000
Goodwill that is tax deductible		31,500,000
Acquisition costs incurred					$ 1,800,000
Net sales generated by Specialized business units				107,400,000
Net income generated by Specialized business units				$ 5,100,000
Specialized Industries LP | Industrial
Business Acquisition [Line Items]
Goodwill		44,600,000
Revolving Credit Facility | Amended and Restated Revolving Credit Agreement | Specialized Industries LP
Business Acquisition [Line Items]
Line of credit		$ 250,000,000				$ 100,000,000