Relationship with Universal Health Realty Income Trust and Other Related Party Transactions - Additional Information (Detail)	1 Months Ended		3 Months Ended		12 Months Ended
	Jun. 30, 2016	Dec. 31, 2014 USD ($) Bed	Mar. 31, 2015 USD ($) Facility RenewalOption	Dec. 31, 2013	Dec. 31, 2016 USD ($) Hospital Facility RenewalOption	Dec. 31, 2015 USD ($) Hospital	Dec. 31, 2014 USD ($) Hospital
Related Party Transaction [Line Items]
Number of hospital facilities | Hospital					3
Chief Executive Officer
Related Party Transaction [Line Items]
Estimated payments to acquire life insurance policies					$ 28,000,000
Payments to acquire life insurance policies					1,300,000	$ 1,300,000
Chief Executive Officer | Trust Owned by CEO
Related Party Transaction [Line Items]
Estimated payments to acquire life insurance policies					$ 9,000,000
McAllen Medical Center
Related Party Transaction [Line Items]
Renewal options term at existing lease rates	5 years				5 years
Renewals extend lease terms at existing lease rates	2021-12				2021-12
Number of renewal options at existing lease rates | RenewalOption					2
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					$ 37,000,000
Relationship with Universal Health Realty Income Trust
Related Party Transaction [Line Items]
Trust outstanding shares held, percentage					5.80%
Advisory fee earned					$ 3,300,000	$ 2,800,000	$ 2,500,000
Percentage of advisory fee on average invested real estate assets					0.70%	0.70%	0.70%
Pre-tax share of income from the Trust					$ 1,000,000	$ 1,400,000	$ 3,200,000
Share of gain included in the share of trust						500,000	2,300,000
Carrying value of investment in Trust					7,700,000	8,700,000
Market value of investment in Trust					51,700,000	39,400,000
Rent expense under operating leases					$ 15,900,000	$ 15,600,000	$ 16,800,000
Number of hospital facilities | Hospital					3	3	4
Number of free-standing emergency departments to be acquired | Facility					2
Lease renewal period, years					5 years
Aggregate construction cost/sales proceeds			$ 13,000,000
Aggregate rent expense paid		$ 1,100,000	$ 900,000
Estimated purchase price of The Bridgeway's real property		$ 17,300,000					$ 17,300,000
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 | Behavioral Health Facility
Related Party Transaction [Line Items]
Number of beds | Bed		103
Relationship with Universal Health Realty Income Trust | Texas
Related Party Transaction [Line Items]
Number of free-standing emergency departments to be acquired | Facility			2
Lease initial terms			10 years
Renewal options term at existing lease rates			5 years
Renewal options term at fair market lease rates			5 years
Number of renewal options at existing lease rates | RenewalOption			6
Relationship with Universal Health Realty Income Trust | Minimum
Related Party Transaction [Line Items]
Non-controlling ownership interests by subsidiaries					95.00%
Lease initial terms					13 years
Relationship with Universal Health Realty Income Trust | Maximum
Related Party Transaction [Line Items]
Non-controlling ownership interests by subsidiaries					100.00%
Lease initial terms					15 years
Premier, Inc. | Group Purchasing Organization Agreement | Restricted Stock
Related Party Transaction [Line Items]
Market value of retained vested shares					$ 23,000,000	$ 13,000,000
Shares vesting period				7 years
Shares vesting period start year				2014
Shares vesting period end year				2020