Supplemental Disclosure of Cash Flow Information - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Supplemental Disclosure of Cash Flow Information:
Interest paid			$ 117,143	$ 114,194
Income taxes paid, net of (refunds)			1,213	(946)
Net cash paid			95,973	109,825
Prepaid expenses and other assets, net			(855)	11,711
Other non-operating (income) loss	$ (199)	$ (3,197)	(3,537)	(6,346)
Refundable fees and deferred revenue			(1,563)	13,021
Non-operating loss (gain) on sale of assets, net			(903)	(860)
Loss (gain) on sale of communities, net	$ 0	$ (36,296)	0	(36,296)
Capital expenditures, net of related payables
Supplemental Disclosure of Cash Flow Information:
Net cash paid			95,973	109,825
Trade accounts payable			(8,676)	(21,050)
Acquisition of assets
Supplemental Disclosure of Cash Flow Information:
Prepaid expenses and other assets, net			0	23
Property, plant and equipment and leasehold intangibles, net			0	6,872
Investment in unconsolidated ventures			0	(3,395)
Other liabilities			0	(384)
Other non-operating (income) loss			0	(2,542)
Net cash paid			0	574
Proceeds from sale of assets, net
Supplemental Disclosure of Cash Flow Information:
Prepaid expenses and other assets, net			(362)	(1,538)
Property, plant and equipment and leasehold intangibles, net			(6,311)	(23,733)
Other liabilities			559	10,021
Refundable fees and deferred revenue			0	9,347
Loss (gain) on sale of communities, net			0	(36,296)
Net cash received			(7,017)	(43,059)
Non-cash lease transactions, net
Supplemental Disclosure of Cash Flow Information:
Property, plant and equipment and leasehold intangibles, net			38	(51,584)
Operating lease right-of-use assets			3,420	178,409
Financing lease obligations			(38)	88,886
Operating lease obligations			(3,420)	(215,711)
Net			0	0
Non-development | Capital expenditures, net of related payables
Supplemental Disclosure of Cash Flow Information:
Net cash paid			102,916	127,727
Development | Capital expenditures, net of related payables
Supplemental Disclosure of Cash Flow Information:
Net cash paid			433	904
Non-development - reimbursable from lessor | Capital expenditures, net of related payables
Supplemental Disclosure of Cash Flow Information:
Net cash paid			$ 1,300	$ 2,244