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Fair Value Measurement - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2016	Sep. 30, 2017
Swap [Member]
Derivatives Details
Derivative, Gain (Loss) on Derivative, Net	$ (0.6)	$ 1.0
Designated as Hedging Instrument [Member] \| Level 2
Derivatives Details
Derivative Asset			$ 0.8
Derivative Liability	1.3	1.3
Not Designated as Hedging Instrument [Member] \| Level 2
Derivatives Details
Derivative Asset	$ 1.1	$ 1.1