Summary of Details of Hospitals Leased from Trust (Parenthetical) (Detail) $ in Millions	Jan. 01, 2022 USD ($) RenewalOption	Dec. 31, 2021
Maximum
Property Subject to or Available for Operating Lease [Line Items]
Real estate leases option to extend lease term		10 years
Minimum
Property Subject to or Available for Operating Lease [Line Items]
Real estate leases option to extend lease term		5 years
Subsequent Event | McAllen Medical Center
Property Subject to or Available for Operating Lease [Line Items]
Renewal options term at existing lease rates	5 years
Subsequent Event | McAllen Medical Center | Maximum
Property Subject to or Available for Operating Lease [Line Items]
Renewal options at existing lease rates expiration year	2031
Subsequent Event | Wellington Regional Medical Center
Property Subject to or Available for Operating Lease [Line Items]
Renewal options term at fair market lease rates	5 years
Real estate leases option to extend lease term	5 years
Lease expiration date	Dec. 31, 2026
Lease rent receivable | $	$ 6.3
Percentage of annual rental increase on cumulative and compound basis	2.50%
Subsequent Event | Wellington Regional Medical Center | Maximum
Property Subject to or Available for Operating Lease [Line Items]
Renewal options at fair market value lease rates expiration year	2031
Subsequent Event | Aiken Regional Medical Center/Aurora Pavilion Behavioral Health Services
Property Subject to or Available for Operating Lease [Line Items]
Renewal options term at fair market lease rates	5 years
Subsequent Event | Aiken Regional Medical Center/Aurora Pavilion Behavioral Health Services | Maximum
Property Subject to or Available for Operating Lease [Line Items]
Renewal options at fair market value lease rates expiration year	2068
Subsequent Event | Aiken Regional Medical Center/Aurora Pavilion Behavioral Health Services | Minimum
Property Subject to or Available for Operating Lease [Line Items]
Renewal options at fair market value lease rates expiration year	2034
Subsequent Event | Canyon Creek Behavioral Health
Property Subject to or Available for Operating Lease [Line Items]
Renewal options term at fair market lease rates	5 years
Subsequent Event | Canyon Creek Behavioral Health | Maximum
Property Subject to or Available for Operating Lease [Line Items]
Renewal options at fair market value lease rates expiration year	2068
Subsequent Event | Canyon Creek Behavioral Health | Minimum
Property Subject to or Available for Operating Lease [Line Items]
Renewal options at fair market value lease rates expiration year	2034
Subsequent Event | Clive Behavioral Health Hospital
Property Subject to or Available for Operating Lease [Line Items]
Renewal options term at fair market lease rates	10 years
Percentage of annual rental increase on cumulative and compound basis	2.75%
Operating leases additional renewal options term at fair market value lease rates	10 years
Number of lease renewal option exercised | RenewalOption	3
Subsequent Event | Clive Behavioral Health Hospital | Maximum
Property Subject to or Available for Operating Lease [Line Items]
Renewal options at fair market value lease rates expiration year	2070
Operating leases additional renewal options at fair market value lease rates expiration year	2090
Subsequent Event | Clive Behavioral Health Hospital | Minimum
Property Subject to or Available for Operating Lease [Line Items]
Renewal options at fair market value lease rates expiration year	2041
Operating leases additional renewal options at fair market value lease rates expiration year	2071