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Subsequent Events (Details) (USD $)
In Millions, except Per Share data, unless otherwise specified
0 Months Ended
Feb. 12, 2013
Jan. 02, 2013
Subsequent Event [Line Items]    
Holding Period Operating Partnership Units   2 years
Subsequent Event [Member]
   
Subsequent Event [Line Items]    
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners   1.00%
Proceeds from Noncontrolling Interests   $ 4.7
Declared date Feb. 12, 2013  
Payment Date Mar. 15, 2013  
Record Date Mar. 01, 2013  
Subsequent Event [Member] | Regular Dividend [Member]
   
Subsequent Event [Line Items]    
Dividend Per Share 0.77  
Subsequent Event [Member] | Special Dividend [Member]
   
Subsequent Event [Line Items]    
Dividend Per Share 0.75