Restructuring Charges - Facilities Restructuring Initiative (Details) - Facilities Restructuring Initiative [Member] $ in Millions	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2015 USD ($)	Sep. 30, 2015 USD ($)	Dec. 31, 2014 USD ($)	Jan. 27, 2014 ft²	Jan. 23, 2014 ft²
Restructuring Cost and Reserve [Line Items]
Area of Real Estate Property				47,000	21,300
Restructuring and Related Cost, Incurred Cost | $	$ 0.1	$ 0.6	$ 0.7