Restructuring Restructuring Plan (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
February 2013 Restructuring Plan [Member]
Number of Employees Reduced by Restructuring	43
Restructuring and Related Cost, Cost Incurred to Date	$ 2.5
May 2012 Restructuring Plan [Member]
Number of Employees Reduced by Restructuring	42
Restructuring and Related Cost, Cost Incurred to Date		$ 1.2