Relationship with Universal Health Realty Income Trust and Related Party Transactions - Additional Information (Detail)	1 Months Ended	3 Months Ended			6 Months Ended		12 Months Ended
	Jun. 30, 2016 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)	Mar. 31, 2015 USD ($) Facility RenewalOption	Jun. 30, 2016 USD ($) Hospital RenewalOption	Jun. 30, 2015 USD ($) Hospital	Dec. 31, 2015 USD ($)
Chief Executive Officer
Related Party Transaction [Line Items]
Estimated payments to acquire life insurance policies					$ 25,000,000
Payments to acquire life insurance policies							$ 1,300,000
Chief Executive Officer | Trust Owned by CEO
Related Party Transaction [Line Items]
Estimated payments to acquire life insurance policies					$ 8,000,000
McAllen Medical Center
Related Party Transaction [Line Items]
Number of renewal options at existing lease rates | RenewalOption					2
Renewal options term at existing lease rates	5 years				5 years
Renewals extend lease terms at existing lease rates	2021-12				2021-12
Wellington Regional Medical Center
Related Party Transaction [Line Items]
Renewal options term at fair market lease rates	5 years				5 years
Renewals extend lease terms at existing lease rates	2021-12				2021-12
Southwest Healthcare System, Inland Valley Campus
Related Party Transaction [Line Items]
Renewal options term at fair market lease rates	5 years				5 years
Renewals extend lease terms at existing lease rates	2021-12				2021-12
Minimum | Chief Executive Officer
Related Party Transaction [Line Items]
Estimated death benefit proceeds					$ 33,000,000
Relationship with Universal Health Realty Income Trust
Related Party Transaction [Line Items]
Trust outstanding shares held, percentage	5.80%	5.80%			5.80%
Advisory fee earned		$ 800,000	$ 700,000		$ 1,500,000	$ 1,400,000
Pre-tax share of income from the Trust		250,000	800,000		500,000	1,000,000
Carrying value of investment in Trust	$ 8,200,000	8,200,000			8,200,000		8,700,000
Market value of investment in Trust	$ 45,000,000	45,000,000			45,000,000		$ 39,400,000
Rent expense under operating leases		$ 4,000,000	$ 4,000,000		$ 8,000,000	$ 8,000,000
Non-controlling ownership interests by subsidiaries	100.00%	100.00%			100.00%
Number of hospital facilities | Hospital					3	3
Lease renewal period, years					5 years
Aggregate construction cost/sales proceeds				$ 13,000,000
Aggregate rent expense paid				$ 900,000
Notice period on renewal of lease					90 days
Period of rights of refusal to leased facilities					180 days
Relationship with Universal Health Realty Income Trust | Texas
Related Party Transaction [Line Items]
Lease initial terms				10 years
Number of free-standing emergency departments to be acquired | Facility				2
Number of renewal options at existing lease rates | RenewalOption				6
Renewal options term at existing lease rates				5 years
Renewal options term at fair market lease rates				5 years
Relationship with Universal Health Realty Income Trust | Minimum
Related Party Transaction [Line Items]
Lease initial terms					13 years
Relationship with Universal Health Realty Income Trust | Maximum
Related Party Transaction [Line Items]
Lease initial terms					15 years