Summary of Significant Accounting Policies - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Disaggregation of Revenue [Line Items]
Resident fees and services	$ 634,519	$ 501,285	$ 1,244,286	$ 998,461
SHOP
Disaggregation of Revenue [Line Items]
Resident fees and services	121,641	71,935	228,665	140,419
ISHC
Disaggregation of Revenue [Line Items]
Resident fees and services	512,878	429,350	1,015,621	858,042
Resident Fees and Services [Member]
Disaggregation of Revenue [Line Items]
Resident fees and services	634,519	501,285	1,244,286	998,461
Resident Fees and Services [Member] \| Over Time [Member]
Disaggregation of Revenue [Line Items]
Resident fees and services	557,148	426,635	1,100,785	851,530
Resident Fees and Services [Member] \| Point in Time [Member]
Disaggregation of Revenue [Line Items]
Resident fees and services	77,371	74,650	143,501	146,931
Resident Fees and Services [Member] \| Private and Other Payors [Member]
Disaggregation of Revenue [Line Items]
Resident fees and services	311,655	224,970	603,005	448,713
Resident Fees and Services [Member] \| Medicare [Member]
Disaggregation of Revenue [Line Items]
Resident fees and services	142,877	128,183	285,626	258,813
Resident Fees and Services [Member] \| Medicaid [Member]
Disaggregation of Revenue [Line Items]
Resident fees and services	116,079	106,563	231,137	211,020
Resident Fees and Services [Member] \| Medicare Advantage [Member]
Disaggregation of Revenue [Line Items]
Resident fees and services	63,908	41,569	124,518	79,915
Resident Fees and Services [Member] \| SHOP
Disaggregation of Revenue [Line Items]
Resident fees and services	121,641	71,935	228,665	140,419
Resident Fees and Services [Member] \| SHOP \| Over Time [Member]
Disaggregation of Revenue [Line Items]
Resident fees and services	117,620	69,864	221,359	136,363
Resident Fees and Services [Member] \| SHOP \| Point in Time [Member]
Disaggregation of Revenue [Line Items]
Resident fees and services	4,021	2,071	7,306	4,056
Resident Fees and Services [Member] \| SHOP \| Private and Other Payors [Member]
Disaggregation of Revenue [Line Items]
Resident fees and services	112,168	62,791	209,465	121,973
Resident Fees and Services [Member] \| SHOP \| Medicare [Member]
Disaggregation of Revenue [Line Items]
Resident fees and services	0	0	0	0
Resident Fees and Services [Member] \| SHOP \| Medicaid [Member]
Disaggregation of Revenue [Line Items]
Resident fees and services	9,473	9,144	19,200	18,446
Resident Fees and Services [Member] \| SHOP \| Medicare Advantage [Member]
Disaggregation of Revenue [Line Items]
Resident fees and services	0	0	0	0
Resident Fees and Services [Member] \| ISHC
Disaggregation of Revenue [Line Items]
Resident fees and services	512,878	429,350	1,015,621	858,042
Resident Fees and Services [Member] \| ISHC \| Over Time [Member]
Disaggregation of Revenue [Line Items]
Resident fees and services	439,528	356,771	879,426	715,167
Resident Fees and Services [Member] \| ISHC \| Point in Time [Member]
Disaggregation of Revenue [Line Items]
Resident fees and services	73,350	72,579	136,195	142,875
Resident Fees and Services [Member] \| ISHC \| Private and Other Payors [Member]
Disaggregation of Revenue [Line Items]
Resident fees and services	199,487	162,179	393,540	326,740
Resident Fees and Services [Member] \| ISHC \| Medicare [Member]
Disaggregation of Revenue [Line Items]
Resident fees and services	142,877	128,183	285,626	258,813
Resident Fees and Services [Member] \| ISHC \| Medicaid [Member]
Disaggregation of Revenue [Line Items]
Resident fees and services	106,606	97,419	211,937	192,574
Resident Fees and Services [Member] \| ISHC \| Medicare Advantage [Member]
Disaggregation of Revenue [Line Items]
Resident fees and services	$ 63,908	$ 41,569	$ 124,518	$ 79,915