Remaining Renewal Options and Terms for Hospital Facilities Leased from Trust (Detail) - USD ($)		3 Months Ended	9 Months Ended
		Jun. 30, 2018	Sep. 30, 2018
McAllen Medical Center
Property Subject to or Available for Operating Lease [Line Items]
Annual Minimum Rent			$ 5,485,000
End of Lease Term		2026-12	2026-12
Renewal Term (years)	[1]		5 years
Wellington Regional Medical Center
Property Subject to or Available for Operating Lease [Line Items]
Annual Minimum Rent			$ 3,030,000
End of Lease Term			2021-12
Renewal Term (years)	[2]		10 years
Southwest Healthcare System, Inland Valley Campus
Property Subject to or Available for Operating Lease [Line Items]
Annual Minimum Rent			$ 2,648,000
End of Lease Term			2021-12
Renewal Term (years)	[2]		10 years

[1] We have one 5-year renewal option at existing lease rates (through 2031).

[2] We have two 5-year renewal options at fair market value lease rates (2022 through 2031).