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Commitments, Contingencies And Guarantees (Tables)
12 Months Ended
Dec. 31, 2011
Commitments, Contingencies And Guarantees [Abstract]  
Schedule Of Minimum Annual Rental Payments
Years Ending December 31,   Amount  
         
2012   $ 12,813  
2013     10,695  
2014     7,442  
2015     6,025  
2016     5,147  
Thereafter     18,080  
    $ 60,202