Business Acquisition (Details 1) - Kay Flow Industries, Inc. $ in Thousands	May 18, 2015 USD ($)
Intangible assets acquisition
Acquired identifiable intangible assets	$ 53,091
Weighted average useful life	10 years	[1]
Unpatented Technology
Intangible assets acquisition
Acquired identifiable intangible assets	$ 13,400
Weighted average useful life	10 years
Customer relationships
Intangible assets acquisition
Acquired identifiable intangible assets	$ 22,800
Weighted average useful life	10 years
Trade name
Intangible assets acquisition
Acquired identifiable intangible assets	$ 15,500
Trade name | Minimum
Intangible assets acquisition
Weighted average useful life	7 years
Trade name | Maximum
Intangible assets acquisition
Weighted average useful life	10 years
Non-compete agreement
Intangible assets acquisition
Acquired identifiable intangible assets	$ 1,342
Weighted average useful life	5 years
Favorable leasehold interest
Intangible assets acquisition
Acquired identifiable intangible assets	$ 49
Weighted average useful life	5 years

[1] weighted average number of years