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Subsequent Events - Additional Information (Detail) (USD $)
3 Months Ended 0 Months Ended 1 Months Ended
Mar. 31, 2014
Mar. 31, 2013
May 12, 2014
Subsequent Event
Community
May 01, 2014
Subsequent Event
May 05, 2014
Subsequent Event
Apr. 01, 2014
Subsequent Event
Apr. 30, 2014
Subsequent Event
Subsequent Event [Line Items]              
Purchase Price $ 190,612,000   $ 72,700,000        
Number of senior housing communities acquired     3        
Monthly cash distribution, per share       $ 0.0338   $ 0.0338  
Stock distribution, shares 454,950 157,449   0.0025   0.0025  
Cash and stock distribution to be paid and distributed, date Jun. 30, 2014            
Additional subscription received         30,100,000    
Additional subscription proceeds received, shares         3,000,000    
Aggregate maximum principal amount available for borrowing $ 240,000,000           $ 275,000,000