Restructuring Costs (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2015	Dec. 31, 2015
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost Remaining		$ 0.4
Restructuring and Related Cost, Cost Incurred to Date		5.0
Special Termination Benefits	$ 2.7
Estimated restructuring costs		5.4
Special Termination Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date		2.6
Relocation of Employees		2.4
Estimated restructuring costs		2.6
Employee Relocation [Member]
Restructuring Cost and Reserve [Line Items]
Estimated restructuring costs		$ 2.8