Relationship with Universal Health Realty Income Trust and Related Party Transactions - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Related Party Transaction [Line Items]
Lease renewal period, years	5
Notice period on renewal of lease	90
Period of rights of refusal to leased facilities	180
Minimum
Related Party Transaction [Line Items]
Lease initial terms	13
Maximum
Related Party Transaction [Line Items]
Lease initial terms	15
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	1,400,000	1,400,000
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%
Advisory fee earned	2,400,000	2,100,000	2,000,000
Pre-tax share of income from the Trust	842,000	1,200,000	4,600,000
Share of income included in the share of trust		500,000	3,700,000
Carrying value of investment in Trust	8,100,000	9,300,000
Market value of investment in Trust	31,500,000	39,900,000
Rent expense under operating leases	$ 16,400,000	$ 16,300,000	$ 16,300,000
Non-controlling ownership interests by subsidiaries	100.00%