Restructuring Plan (Details Textual) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
May 2012 Restructuring Plan [Member]
Restructuring and Related Cost, Cost Incurred to Date	$ 1.2
Number of Employees Reduced by Restructuring	42
February 2013 Restructuring Plan [Member]
Restructuring and Related Cost, Cost Incurred to Date	$ 2.5
Number of Employees Reduced by Restructuring	43