Summary Of Significant Accounting Policies Summary of Siginificant Accounting Policies (Schedule of Change in Accumulated Other Comprehensive Income) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Accounting Policies [Abstract]
Foreign transaltion adjustment, Balance	$ 160,661	$ 134,976	$ 176,982	$ 296,182
Pensions, Balance	(928)	663	1,115	735
Total, Balance	159,733	135,639	178,097	296,917
Foreign translation adjustment, Activity	25,685	(42,006)	(119,200)
Pensions, Activity	1,591	452	(380)
Total, Activity	$ 24,094	$ (42,458)	$ (118,820)