Goodwill (Tables)

12 Months Ended

Dec. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

The changes in the carrying amount of goodwill for the twelve months ended December 31, 2015, 2016, and 2017 are as follows:

	Industrial				Agricultural				European				Consolidated
(in thousands)
Balance at December 31, 2014		$	57,320			$	695			$	17,676			$	75,691
Translation adjustment		(1,027		)		(710		)		(1,444		)		(3,181		)
Goodwill acquired		—				2,999				—				2,999
Balance at December 31, 2015		$	56,293			$	2,984			$	16,232			$	75,509
Translation adjustment		154				505				(1,343		)		(684		)
Balance at December 31, 2016		$	56,447			$	3,489			$	14,889			$	74,825
Translation adjustment		389				(27		)		1,833				2,195
Goodwill acquired		4,846				2,895				—				7,741
Balance at December 31, 2017		$	61,682			$	6,357			$	16,722			$	84,761