Real Estate and Other Activities - Prospect Medical Holdings Additional Information (Detail) $ in Thousands		1 Months Ended	3 Months Ended
		Aug. 31, 2019 USD ($) Hospital	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2023 USD ($)	Jun. 30, 2022 USD ($)	Dec. 31, 2021 USD ($)
Business Acquisition [Line Items]
Additional mortgage loan				$ 1,332,962	$ 235,187		$ 5,350,239
Net impairment charge			$ 86,000
Mortgage Loans [Member]
Business Acquisition [Line Items]
Additional mortgage loan	[1]			159,735			$ 1,113,300
Prospect [Member]
Business Acquisition [Line Items]
Purchase price of acquisition		$ 1,500,000
Additional mortgage loan						$ 100,000
Term loan		$ 112,900
Net impairment charge				280,000
Prospect [Member] | Pennsylvania [Member]
Business Acquisition [Line Items]
Carrying value of lease requiring residual value guarantee				170,000
Prospect [Member] | Pennsylvania [Member] | Maximum [Member]
Business Acquisition [Line Items]
Carrying value of lease requiring residual value guarantee				$ 250,000
Acute Care Campus [Member] | Prospect [Member]
Business Acquisition [Line Items]
Number of facilities acquired | Hospital		14

[1] The 2023 column includes a $23 million mortgage loan that was converted to fee simple ownership of one property as described under the Lifepoint Transaction below. The 2021 column includes an £800 million mortgage loan advanced to the Priory Group (“Priory”) in the first quarter of 2021 and converted to fee simple ownership of 35 properties in the second quarter of 2021 as described below.