Leases (Narrative) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Operating Leased Assets [Line Items]
Capital Leased Assets, Gross	$ 3.6
Capital Leases, Lessee Balance Sheet, Assets by Major Class, Accumulated Depreciation	$ 0.4
Number of real estate leases	45
Number Of Service Center Locations	225
Aggregate expense under operating leases	$ 15.2	$ 16.5	$ 17.9