Summary Of Significant Accounting Policies (Accumulated Other Comprehensive Income) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Summary Of Significant Accounting Policies [Abstract]
Foreign translation adjustment, beginning balance	$ 176,982	$ 296,182
Pensions, beginning balance	1,115	735
Beginning balance	178,097	296,917
Foreign translation adjustment	(42,006)	(119,200)	36,089
Pensions	(452)	380	(914)
Comprehensive income net during the period	(42,458)	(118,820)
Pensions, ending balance	663	1,115	735
Foreign translation adjustment, ending balance	134,976	176,982	296,182
Ending balance	$ 135,639	$ 178,097	$ 296,917