Description of Business (Details)
$ in Millions
3 Months Ended
Sep. 30, 2015
property
Jun. 30, 2015
property
Dec. 31, 2015
property
Aug. 18, 2015
property
Aug. 17, 2015
USD ($)
property
installment
Real estate properties          
Spin-off common stock conversion         0.25
Properties classified as held for sale     10    
Ventas, Inc.          
Real estate properties          
Number of real estate properties   358     355
Number of properties not transferred in separation   2      
Number of real estate properties sold 5 1      
Properties classified as held for sale       5  
Net Parent Investment          
Real estate properties          
Service fee owed | $         $ 2.5
Number of quarterly installments due to Ventas | installment         4