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Summary Of Significant Accounting Policies (Tables)
12 Months Ended
Dec. 31, 2011
Summary Of Significant Accounting Policies [Abstract]  
Components Of Property, Plant And Equipment And Depreciation
 

Buildings and improvements

  

10– 40 years

  
 

Furniture, fixtures and equipment

  

3– 20 years

  
 

Leasehold improvements

  

5– 40 years