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Leases (Details)
 9 Months Ended
Sep. 30, 2020
community
lease
Leases [Abstract]  
Operating and financing leases, number of communities | community 302
Operating lease, number of communities 236
Financing leases, number of communities 66
Minimum  
Lessee, Lease, Description [Line Items]  
Finance and operating lease, renewal term 5 years
Maximum  
Lessee, Lease, Description [Line Items]  
Finance and operating lease, renewal term 20 years