Relationship with Universal Health Realty Income Trust and Related Party Transactions - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Chief Executive Officer
Related Party Transaction [Line Items]
Estimated payments to acquire life insurance policies			$ 25,000,000
Chief Executive Officer | Minimum
Related Party Transaction [Line Items]
Estimated death benefit proceeds			33,000,000
Chief Executive Officer | Trust Owned by Chief Executive Officer
Related Party Transaction [Line Items]
Estimated payments to acquire life insurance policies			8,000,000
Relationship with Universal Health Realty Income Trust
Related Party Transaction [Line Items]
Trust outstanding shares held, percentage	6.10%		6.10%
Advisory fee earned	600,000	600,000	1,200,000	1,200,000
Pre-tax share of income from the Trust	100,000	200,000	400,000	500,000
Carrying value of investment in Trust	8,000,000		8,000,000		8,000,000
Market value of investment in Trust	34,000,000		34,000,000		32,000,000
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%