Restructuring Restructuring Expected Costs, Costs To-Date, Remaining Costs, and Costs During the Period - 2013 Projects (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		15 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Restructuring Cost and Reserve [Line Items]
Restructuring expense	$ (5,447)	$ 5,524
2013 Project [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expense			$ 26,200