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Summary of Significant Accounting Policies (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Fair Value of Financial Instruments [Line Items]          
Term of residency agreements- minimum     30 days    
Term of residency agreements - maximum     1 year    
Decrease in facility operating expense $ 2.0 $ 13.7 $ 5.6 $ 13.7  
Carrying Value, Fair Value Disclosure [Member]          
Fair Value of Financial Instruments [Line Items]          
Outstanding debt $ 3,600.0   $ 3,600.0   $ 3,600.0