Restructuring (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended		12 Months Ended
	Dec. 31, 2009	Apr. 11, 2011	Dec. 31, 2011 2011 Restructuring Program [Member]
Restructuring And Related Cost [Line Items]
Number of senior management members entered into separation agreements		4
Restructuring expenses			$ 10,931
Number of senior executives included in restructuring expense related to severance benefits	3