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Supplemental Disclosure of Cash Flow Information - Additional Information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($) community	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Aug. 31, 2020 community
Related Party Transaction [Line Items]
Net cash paid for termination of operating leases	$ 0	$ 0	$ 33,596
Net cash paid for termination of capital and financing leases			12,500
Number of communities owned | community				16
Ownership Percentage	50.00%
Proceeds from notes receivable	$ 5,419	$ 34,109	1,580
Joint Venture
Related Party Transaction [Line Items]
Payments to acquire interest in joint venture	$ 13,300
Number of communities owned | community	2
Distributions to partners	$ 6,300
Proceeds from notes receivable	3,100
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			$ 54,600

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Fair value portion of an agreement for an unconditional promise by the maker to pay the holder a definite sum of money at a future date.

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