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Debt (Effect Of The Derivative Financial Instruments On The Consolidated Statements Of Operations And Consolidated Statements Of Equity) (Details) (USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Amount of gain recognized in other comprehensive (loss) (effective portion) $ 21,000 $ 113,000 $ 309,000 $ 411,000
Cedar/Rio Can Joint Venture [Member]
       
Amount of gain recognized in other comprehensive (loss) (effective portion) $ 4,000   $ 58,000