Goodwill and Intangible Assets (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($)
Goodwill [Line Items]
Goodwill, Beginning Balance	$ 108,869
Currency translation	11
Goodwill, Ending Balance	108,880
Hydraulics [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	2,496
Currency translation	11
Goodwill, Ending Balance	2,507
Electronics [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	106,373
Currency translation	0
Goodwill, Ending Balance	$ 106,373