Supplemental Disclosure of Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Supplemental Disclosure of Cash Flow Information:
Interest paid			$ 114,194	$ 92,673
Income taxes paid, net of refunds			(946)	598
Net cash paid			109,825	96,851
Prepaid expenses and other assets, net			11,711	(5,550)
Investment in unconsolidated ventures			0	(167)
Other non-operating loss (income)	$ (3,197)	$ 111	(6,346)	138
Refundable fees and deferred revenue			13,021	3,956
Non-operating (gain) loss on sale of assets, net			(860)	(667)
Loss (gain) on sale of communities, net	$ (36,296)	$ 0	(36,296)	0
Capital expenditures, net of related payables
Supplemental Disclosure of Cash Flow Information:
Net cash paid			109,825	96,851
Trade accounts payable			(21,050)	(2,684)
Acquisition of assets, net of cash acquired
Supplemental Disclosure of Cash Flow Information:
Prepaid expenses and other assets, net			23	0
Property, plant and equipment and leasehold intangibles, net			6,872	4
Investment in unconsolidated ventures			(3,395)	0
Financing lease obligations			0	6,000
Other liabilities			(384)	0
Other non-operating loss (income)			(2,542)	0
Net cash paid			574	6,004
Proceeds from sale of assets, net
Supplemental Disclosure of Cash Flow Information:
Prepaid expenses and other assets, net			(1,538)	(1,264)
Property, plant and equipment and leasehold intangibles, net			(23,733)	0
Other liabilities			10,021	(140)
Assets held for sale			0	(3,668)
Refundable fees and deferred revenue			9,347	0
Loss (gain) on sale of communities, net			(36,296)	0
Net cash received			(43,059)	(5,739)
Non-cash lease transactions, net
Supplemental Disclosure of Cash Flow Information:
Property, plant and equipment and leasehold intangibles, net			(51,584)	11,056
Financing lease obligations			88,886	(6,296)
Operating lease right-of-use assets			178,409	10,780
Operating lease obligations			(215,711)	(15,540)
Net			0	0
Non-development | Capital expenditures, net of related payables
Supplemental Disclosure of Cash Flow Information:
Net cash paid			127,727	85,012
Development | Capital expenditures, net of related payables
Supplemental Disclosure of Cash Flow Information:
Net cash paid			904	2,690
Non-development - reimbursable from lessor | Capital expenditures, net of related payables
Supplemental Disclosure of Cash Flow Information:
Net cash paid			$ 2,244	$ 11,833