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Supplemental Disclosure of Cash Flow Information - Additional Information (Details)
$ in Thousands
3 Months Ended 9 Months Ended
Jun. 30, 2019
USD ($)
community
Sep. 30, 2019
USD ($)
Sep. 30, 2018
USD ($)
Related Party Transaction [Line Items]      
Net cash paid for termination of operating leases   $ 0 $ 33,596
Joint Venture      
Related Party Transaction [Line Items]      
Payments to acquire interest in joint venture $ 13,300    
Number of communities owned | community 3    
Percentage ownership 50.00%    
Promissory Note | Joint Venture      
Related Party Transaction [Line Items]      
Notes receivable $ 6,600    
Lease termination And modification, net      
Related Party Transaction [Line Items]      
Net cash paid for termination of operating leases   46,600  
Payments (proceeds) for termination of capital and financing leases, financing activities   $ 12,500