Supplemental Disclosure of Cash Flow Information - Supplemental Disclosure of Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Supplemental Disclosure of Cash Flow Information:
Interest paid	$ 243,071	$ 231,786	$ 200,308
Income taxes paid, net of (refunds)	1,051	(1,429)	(330)
Capital expenditures, net of related payables	201,250	233,205	196,924
Prepaid expenses and other assets, net	(21,560)	21,629	(21,240)
Investment in unconsolidated ventures	0	(7,589)	(218)
Other non-operating loss (income)	(9,376)	(21,687)	(12,114)
Refundable fees and deferred revenue	5,221	(654)	(1,934)
Loss (gain) on sale of communities, net	0	(36,296)	(73,850)
Capital expenditures, net of related payables:
Supplemental Disclosure of Cash Flow Information:
Capital expenditures, net of related payables	201,250	233,205	196,924
Trade accounts payable	(3,100)	4,613	(3,085)
Acquisition of assets, net of cash acquired:
Supplemental Disclosure of Cash Flow Information:
Prepaid expenses and other assets, net	0	23	0
Property, plant and equipment and leasehold intangibles, net	277,997	6,872	4
Investment in unconsolidated ventures	0	(3,395)	0
Operating lease right-of-use assets	(51,968)	0	0
Long-term debt	(188,634)	0	0
Financing lease obligations	0	0	6,000
Operating lease obligations	71,016	0	0
Other liabilities	0	(384)	0
Other non-operating loss (income)	0	(2,542)	0
Net cash paid	108,411	574	6,004
Proceeds from sale of assets, net:
Supplemental Disclosure of Cash Flow Information:
Prepaid expenses and other assets, net	(362)	(1,889)	(1,308)
Property, plant and equipment and leasehold intangibles, net	(6,291)	(36,545)	(107)
Investment in unconsolidated ventures	0	(27,392)	0
Other liabilities	559	10,690	1,025
Refundable fees and deferred revenue	0	9,347	0
Non-operating loss (gain) on sale of assets, net	(923)	(1,441)	(595)
Loss (gain) on sale of communities, net	0	(36,296)	0
Assets held for sale	0	0	(3,668)
Net cash received	(7,017)	(83,526)	(4,653)
Non-Development | Capital expenditures, net of related payables:
Supplemental Disclosure of Cash Flow Information:
Capital expenditures, net of related payables	186,755	216,511	168,166
Development | Capital expenditures, net of related payables:
Supplemental Disclosure of Cash Flow Information:
Capital expenditures, net of related payables	637	1,762	6,193
Non-development - Reimbursable | Capital expenditures, net of related payables:
Supplemental Disclosure of Cash Flow Information:
Capital expenditures, net of related payables	$ 16,958	$ 10,319	$ 25,650