Lease Accounting - Additional Information (Detail)		3 Months Ended		12 Months Ended
		Dec. 31, 2022 USD ($)	Mar. 31, 2022 USD ($) Subsidiary	Dec. 31, 2022 USD ($) Facility Land Property	Dec. 31, 2021 USD ($) Lease Subsidiary	Dec. 31, 2020 USD ($)
Leases Disclosure [Line Items]
Number of properties | Property				2
Operating expenses excluding depreciation and amortization expense				$ 662,000	$ 737,000
Number of vacant specialty facilities | Facility				2
Lessee in connection with ground leases for land | Land				14
Right-of-use land assets		$ 11,457,000		$ 11,457,000	11,495,000
Ground lease liabilities		11,457,000		11,457,000	11,495,000
Measurement of lease liabilities related to operating leases				611,000	508,000
Operating lease expense				$ 611,000	$ 508,000	$ 480,000
Wellington Regional Medical Center | Palm Beach, Florida
Leases Disclosure [Line Items]
Lessee operating lease, existence of option to extend					true
Operating lease renewal term					5 years
Monthly lease rent receivable					$ 6,300,000
Percentage of annual rental increase on cumulative and compound basis					2.50%
Lease revenue					$ 5,500,000	5,100,000
Wellington Regional Medical Center | Base Rents | Palm Beach, Florida
Leases Disclosure [Line Items]
Lease revenue					3,000,000.0	3,000,000.0
Wellington Regional Medical Center | Bonus Rents | Palm Beach, Florida
Leases Disclosure [Line Items]
Lease revenue					2,500,000	2,100,000
4058 W. Melrose Specialty Facility, Chicago, Illinois
Leases Disclosure [Line Items]
Lease expiration date				Dec. 31, 2021
Specialty Hospital In Chicago, Illinois
Leases Disclosure [Line Items]
Lease revenue					1,600,000
Operating lease lease income, percentage				2.00%
Lease settlement and release agreement amount		$ 1,250,000
Lease Demolition Cost				$ 1,400,000
Other operating expenses demolition costs				332,000
Operating expenses including demolition costs				$ 1,600,000
Number of vacant properties | Property				3
Operating expenses excluding demolition				$ 1,300,000
Evansville Rehabilitation Hospital Evansville, Indiana and Corpus Christi Facility Corpus Christi, Texas
Leases Disclosure [Line Items]
Number of specialty facilities | Facility				2
Aiken Regional Medical Center and Canyon Creek Behavioral Health
Leases Disclosure [Line Items]
Fair market value of real estate assets received				$ 83,600,000	$ 82,400,000
Monthly lease rent receivable			$ 5,700,000
Percentage of annual rental increase on cumulative and compound basis				2.25%
Lease revenue				$ 0
Lease expiration date					Dec. 31, 2033
Interest income on financing leases - UHS facilities				5,500,000
Aiken Regional Medical Center and Canyon Creek Behavioral Health | Bonus Rents
Leases Disclosure [Line Items]
Monthly lease rent receivable			5,700,000
Lease revenue				0
Aiken Regional Medical Center and Canyon Creek Behavioral Health | Southwest Healthcare System Inland Valley Campus
Leases Disclosure [Line Items]
Lease revenue					$ 4,500,000	4,400,000
Aiken Regional Medical Center and Canyon Creek Behavioral Health | Southwest Healthcare System Inland Valley Campus | Base Rents
Leases Disclosure [Line Items]
Lease revenue					2,600,000	2,600,000
Aiken Regional Medical Center and Canyon Creek Behavioral Health | Southwest Healthcare System Inland Valley Campus | Bonus Rents
Leases Disclosure [Line Items]
Lease revenue					1,900,000	1,800,000
Aiken Regional Medical Center
Leases Disclosure [Line Items]
Monthly lease rent receivable			3,900,000
Canyon Creek Behavioral Health
Leases Disclosure [Line Items]
Monthly lease rent receivable			$ 1,800,000
Universal Health Services, Inc
Leases Disclosure [Line Items]
Lease revenue	[1]			29,954,000	29,896,000	24,571,000
Interest income on financing leases - UHS facilities				5,474,000
Universal Health Services, Inc | Base Rents
Leases Disclosure [Line Items]
Lease revenue				24,485,000	21,498,000	17,302,000
Universal Health Services, Inc | Bonus Rents
Leases Disclosure [Line Items]
Lease revenue	[2]			$ 2,801,000	6,906,000	6,116,000
Universal Health Services, Inc | Wellington Regional Medical Center
Leases Disclosure [Line Items]
Percentage of annual rental increase on cumulative and compound basis				2.50%
Universal Health Services, Inc | Wellington Regional Medical Center | Palm Beach, Florida
Leases Disclosure [Line Items]
Operating lease renewal term		5 years		5 years
Monthly lease rent receivable		$ 6,300,000		$ 6,300,000
Percentage of annual rental increase on cumulative and compound basis				2.50%
Lease revenue					5,500,000	5,100,000
Universal Health Services, Inc | Wellington Regional Medical Center | Base Rents | Palm Beach, Florida
Leases Disclosure [Line Items]
Lease revenue					3,000,000.0	3,000,000.0
Universal Health Services, Inc | Wellington Regional Medical Center | Bonus Rents | Palm Beach, Florida
Leases Disclosure [Line Items]
Lease revenue					$ 2,500,000	$ 2,100,000
Universal Health Services, Inc | Subsidiary
Leases Disclosure [Line Items]
Number of wholly-owned subsidiaries | Subsidiary			2		2
Financing Arrangements
Leases Disclosure [Line Items]
Number of lease property | Lease					2
Asset Purchase and Sale Agreement | Universal Health Services, Inc | Subsidiary
Leases Disclosure [Line Items]
Cash received for sale of real estate asset			$ 4,100,000		$ 4,100,000
Asset Purchase and Sale Agreement | Universal Health Services, Inc | Subsidiary | Aiken Regional Medical Center and Canyon Creek Behavioral Health
Leases Disclosure [Line Items]
Number of wholly-owned subsidiaries | Subsidiary					2
Fair market value of real estate assets received			$ 83,700,000		$ 83,700,000
Asset Purchase and Sale Agreement | Universal Health Services, Inc | Subsidiary | Inland Valley Campus of Southwest Healthcare System
Leases Disclosure [Line Items]
Fair market value of real estate asset sold					79,600,000
Cash received for sale of real estate asset					2,800,000
Asset Purchase and Sale Agreement | Universal Health Services, Inc | Subsidiary | Aiken Regional Medical Center
Leases Disclosure [Line Items]
Fair market value of real estate assets received					57,700,000
Asset Purchase and Sale Agreement | Universal Health Services, Inc | Subsidiary | Canyon Creek Behavioral Health
Leases Disclosure [Line Items]
Fair market value of real estate asset sold					$ 26,000,000.0

[1] Includes bonus rental on McAllen Medical Center, a UHS acute care hospital facility, of $2,801 for the year ended December 31, 2022, and includes bonus rental on three UHS acute care hospital facilities of $6,906 and $6,116 for the years ended December 31, 2021 and 2020, respectively.

[2] Includes bonus rental on McAllen Medical Center, a UHS acute care hospital facility of $2,801 for the year ended December 31, 2022, and includes bonus rental on three UHS acute care hospital facilities of $6,906 and $6,116 for the years ended December 31, 2021 and 2020, respectively. Please see disclosure below surrounding the December 31, 2021 asset purchase and sale transaction with UHS.