Remaining Renewal Options and Terms for Hospital Facilities Leased from Trust (Parenthetical) (Detail) - 3 months ended Mar. 31, 2015 - RenewalOptions	Total
McAllen Medical Center
Property Subject to or Available for Operating Lease [Line Items]
Number of renewal options at existing lease rates	3
Renewal options term at existing lease rates	5 years
McAllen Medical Center | Maximum
Property Subject to or Available for Operating Lease [Line Items]
Renewal options at existing lease rates expiration year	2031
Wellington Regional Medical Center
Property Subject to or Available for Operating Lease [Line Items]
Number of renewal options at existing lease rates	1
Renewal options term at existing lease rates	5 years
Number of renewal options at fair market lease rates	2
Renewal options term at fair market lease rates	5 years
Wellington Regional Medical Center | Maximum
Property Subject to or Available for Operating Lease [Line Items]
Renewal options at existing lease rates expiration year	2021
Renewal options at fair market value lease rates expiration year	2031
Wellington Regional Medical Center | Minimum
Property Subject to or Available for Operating Lease [Line Items]
Renewal options at fair market value lease rates expiration year	2022
Southwest Healthcare System, Inland Valley Campus
Property Subject to or Available for Operating Lease [Line Items]
Number of renewal options at existing lease rates	1
Renewal options term at existing lease rates	5 years
Number of renewal options at fair market lease rates	2
Renewal options term at fair market lease rates	5 years
Southwest Healthcare System, Inland Valley Campus | Maximum
Property Subject to or Available for Operating Lease [Line Items]
Renewal options at existing lease rates expiration year	2021
Renewal options at fair market value lease rates expiration year	2031
Southwest Healthcare System, Inland Valley Campus | Minimum
Property Subject to or Available for Operating Lease [Line Items]
Renewal options at fair market value lease rates expiration year	2022