Business Acquisitions - Acquired Intangible Assets (Details) - Kay Flow Industries, Inc. $ in Thousands	May. 18, 2015 USD ($)
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	$ 53,091
Useful life (years)	10 years	[1]
Unpatented technology
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	$ 13,400
Useful life (years)	10 years
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	$ 22,800
Useful life (years)	10 years
Trade names
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	$ 15,500
Noncompete agreements
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	$ 1,342
Useful life (years)	5 years
Favorable leasehold interest
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	$ 49
Useful life (years)	5 years
Minimum | Trade names
Acquired Finite-Lived Intangible Assets [Line Items]
Useful life (years)	7 years
Maximum | Trade names
Acquired Finite-Lived Intangible Assets [Line Items]
Useful life (years)	10 years

[1] weighted average number of years