Goodwill and Other Intangible Assets (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 6.1	$ 5.2	$ 4.8
PowerSteering [Member] | Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life			3 years
Amortization expense			$ 1.1