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Shareholders' Equity (Tables)
9 Months Ended
Sep. 30, 2011
Shareholders' Equity [Abstract] 
Schedule Of ATM Program

Period

    Aggregate
Number of
Shares Sold		      Aggregate
Gross Proceeds		      Aggregate
Net Proceeds		      Average Sales
Price Per Share		  

First quarter 2011

      1,516,379       $ 49,575,000       $ 48,400,000       $ 32.69