Defined Benefit Plans (Schedule of Net Benefit Costs and Amounts Recognized in Other Comprehensive Income (Loss)) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2012 U.S. Pension Plans [Member]	Mar. 31, 2011 U.S. Pension Plans [Member]	Dec. 31, 2011 Non-U.S. Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 286	$ 268	$ 960
Interest cost	2,294	2,699	1,896
Amortization of unrecognized net loss	201	98
Expected return on plan assets	(2,613)	(2,573)
Net periodic benefit cost	$ 168	$ 492	$ 2,856