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Management Transition Charges (Details) (USD $)
1 Months Ended 12 Months Ended
Jun. 30, 2011
Dec. 31, 2012
Dec. 31, 2011
Management Transition Charges [Line Items]      
Severance Costs $ 3,700,000    
Professional fees and expenses related to hiring a new Company President 1,200,000    
Accelerated vestings   362,000 1,980,000
Management transition charges   1,172,000 6,875,000
RioCan Real Estate Investment Trust [Member]
     
Management Transition Charges [Line Items]      
Severance Costs   $ 1,200,000