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Equity-Method Investment And Other Assets (Narrative) (Details) (USD $)
9 Months Ended
Sep. 30, 2014
properties
Jun. 30, 2014
Sep. 30, 2013
Dec. 31, 2013
Jun. 30, 2013
Investment [Line Items]          
Equity Method Investment, Difference Between Carrying Amount and Underlying Equity         $ 8,986,000
Number of Real Estate Properties 163        
Net Assets Received In Acquisition of Equity-Method Investee 0   817,000    
Variable Interest Entity, Financial or Other Support, Amount   0      
Proceeds from Equity Method Investment, Dividends or Distributions 0   0    
Lease escrow deposits 22,775,000     22,775,000  
Payments for Delayed Tax Exempt Exchange 23,813,000        
Bickford Senior Living [Member]
         
Investment [Line Items]          
Number of Real Estate Properties         17
Lease Security [Member]
         
Investment [Line Items]          
Lease escrow deposits 21,275,000        
Capital Improvements Reserve [Member]
         
Investment [Line Items]          
Lease escrow deposits $ 1,500,000        
Holiday Acquisition Holdings [Member]
         
Investment [Line Items]          
Number of Real Estate Properties 25        
Lessor Leasing Arrangements, Operating Leases, Term of Contract 17 years 0 months 0 days