Summary Of Significant Accounting Policies (Cumulative Translation Adjustments Included In Accumulated Other Comprehensive Income) (Details)

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Summary Of Significant Accounting Policies (Cumulative Translation Adjustments Included In Accumulated Other Comprehensive Income) (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008
Summary Of Significant Accounting Policies [Abstract]
Cumulative translation adjustments included in accumulated other comprehensive income	$ 1,087,000	$ 2,952,000	$ 696,000	$ (4,803,000)