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Relationship with Universal Health Realty Income Trust and Related Party Transactions - Additional Information (Detail) (USD $)
 1 Months Ended 3 Months Ended 6 Months Ended
Dec. 31, 2010
Chief Executive Officer
Dec. 31, 2010
Chief Executive Officer
Trust Owned by Chief Executive Officer
Jun. 30, 2012
Universal Health Realty Income Trust
Jun. 30, 2011
Universal Health Realty Income Trust
Jun. 30, 2012
Universal Health Realty Income Trust
Jun. 30, 2011
Universal Health Realty Income Trust
Dec. 31, 2011
Universal Health Realty Income Trust
Jun. 30, 2012
Related Party A
Acute Care Facility
Related Party Transaction [Line Items]                
Trust outstanding shares held, percentage     6.20%   6.20%      
Advisory fee earned     $ 520,000 $ 480,000 $ 1,000,000 $ 951,000    
Pre-tax share of income from the Trust     591,000 260,000 891,000 560,000    
Carrying value of investment in Trust     9,000,000   9,000,000   9,900,000  
Market value of investment in Trust     32,700,000   32,700,000   30,700,000  
Rent expense under operating leases     4,100,000 4,100,000 8,200,000 8,300,000    
Non-controlling ownership interests by subsidiaries     100.00%   100.00%      
Estimated payments to acquire life insurance policies 25,000,000 8,000,000            
Estimated death benefit proceeds 33,000,000              
Fair-market value of personal residence of president of Acute Care Division               $ 1,000,000