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Relationship with Universal Health Realty Income Trust and Other Related Party Transactions - Additional Information (Detail) | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2014 USD ($) Bed | Mar. 31, 2015 USD ($) Facility RenewalOption | Dec. 31, 2015 USD ($) Facility Hospital | Dec. 31, 2014 USD ($) Hospital | Dec. 31, 2013 USD ($) Facility Hospital
Related Party Transaction [Line Items] |  |  |  |  |
Number of hospital facilities | Facility |  |  | 3 |  | 3
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 | $ 1,300,000 | $ 1,300,000
Chief Executive Officer | Trust Owned by Chief Executive Officer |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Estimated payments to acquire life insurance policies |  |  | 8,000,000 |  |
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 |  |  | 5.90% |  |
Advisory fee earned |  |  | $ 2,800,000 | $ 2,500,000 | $ 2,400,000
Percentage of advisory fee on average invested real estate assets |  |  | 0.70% | 0.70% | 0.70%
Pre-tax share of income from the Trust |  |  | $ 1,400,000 | $ 3,200,000 | $ 842,000
Share of gain included in the share of trust |  |  | 500,000 | 2,300,000 |
Carrying value of investment in Trust | $ 9,300,000 |  | 8,700,000 | 9,300,000 |
Market value of investment in Trust | 37,900,000 |  | 39,400,000 | 37,900,000 |
Rent expense under operating leases |  |  | $ 15,600,000 | $ 16,800,000 | $ 16,400,000
Number of hospital facilities | Hospital |  |  | 3 | 4 | 4
Non-controlling ownership interests by subsidiaries |  |  | 100.00% |  |
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] |  |  |  |  |
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 |  |

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