Business Combinations, Intangible Assets Acquired (Details) - WANDL, Inc, [Member] $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($)
Business Acquisition [Line Items]
Acquired intangible asset, weighted average estimated useful life (in years)	7 years
Intangible assets acquired	$ 17.8
Existing technology [Member]
Business Acquisition [Line Items]
Acquired intangible asset, weighted average estimated useful life (in years)	7 years
Intangible assets acquired	$ 10.7
Customer Relationships [Member]
Business Acquisition [Line Items]
Acquired intangible asset, weighted average estimated useful life (in years)	7 years
Intangible assets acquired	$ 6.0
Trade Names [Member]
Business Acquisition [Line Items]
Acquired intangible asset, weighted average estimated useful life (in years)	4 years
Intangible assets acquired	$ 0.6
Backlog [Member]
Business Acquisition [Line Items]
Acquired intangible asset, weighted average estimated useful life (in years)	1 year
Intangible assets acquired	$ 0.2
Non-compete Agreements [Member]
Business Acquisition [Line Items]
Acquired intangible asset, weighted average estimated useful life (in years)	2 years
Intangible assets acquired	$ 0.3