Segment Information (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2025 USD ($) segment	Mar. 31, 2024 USD ($)	Dec. 31, 2024 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment	3
Total revenue	$ 813,864	$ 782,831
Total facility operating expenses	556,987	542,550
Total segment operating income	223,087	204,309
General and administrative expense (including non-cash stock-based compensation expense)	47,874	45,732
Facility operating lease expense:	52,874	51,496
Depreciation and amortization:	90,976	86,127
Asset impairment:	1,787	1,708
Income (loss) from operations	29,576	19,246
Interest expense:	65,031	57,687
Capital expenditures:	43,149	51,058
Total assets	6,205,691		$ 6,335,562
Goodwill	27,321		27,321
Independent Living
Segment Reporting Information [Line Items]
Goodwill	27,300		27,300
Operating Segments | Independent Living
Segment Reporting Information [Line Items]
Total revenue	157,117	148,948
Community labor expenses:	58,284	57,140
Other facility operating expenses	44,601	43,165
Total segment operating income	54,232	48,643
Facility operating lease expense:	9,820	9,431
Depreciation and amortization:	25,837	22,043
Interest expense:	15,588	16,186
Capital expenditures:	10,270	12,720
Total assets	1,230,952		1,252,736
Operating Segments | Assisted Living and Memory Care
Segment Reporting Information [Line Items]
Total revenue	533,379	510,872
Community labor expenses:	252,710	246,574
Other facility operating expenses	131,116	126,840
Total segment operating income	149,553	137,458
Facility operating lease expense:	39,906	37,908
Depreciation and amortization:	51,640	49,023
Asset impairment:	1,387	1,708
Interest expense:	37,671	36,002
Capital expenditures:	26,526	31,048
Total assets	3,944,748		3,983,311
Operating Segments | CCRCs
Segment Reporting Information [Line Items]
Total revenue	86,958	84,421
Community labor expenses:	46,293	46,054
Other facility operating expenses	23,983	22,777
Total segment operating income	16,682	15,590
Facility operating lease expense:	3,381	3,125
Depreciation and amortization:	8,732	8,837
Asset impairment:	400	0
Interest expense:	5,357	5,804
Capital expenditures:	3,462	4,533
Total assets	635,147		640,720
Operating Segments | Corporate and All Other
Segment Reporting Information [Line Items]
Total revenue	36,410	38,590
Total segment operating income	2,620	2,618
Facility operating lease expense:	(233)	1,032
Depreciation and amortization:	4,767	6,224
Interest expense:	6,415	(305)
Capital expenditures:	2,891	$ 2,757
Total assets	$ 394,844		$ 458,795