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Relationship with Universal Health Realty Income Trust and Related Party Transactions - Additional Information (Detail) (USD $) | 3 Months Ended
--- | ---
Mar. 31, 2014 | Mar. 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% |
Advisory fee earned | 600,000 | 600,000
Pre-tax share of income from the Trust | 300,000 | 300,000
Carrying value of investment in Trust | 8,000,000 | 8,000,000
Market value of investment in Trust | 33,000,000 | 32,000,000
Rent expense under operating leases | $ 4,000,000 | $ 4,000,000
Non-controlling ownership interests by subsidiaries | 100.00% |

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- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571 + Details
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- Definition This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=16385135&loc=d3e33749-111570 + Details
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- Definition Amount of fees earned from providing investment advice and research to customers. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.13(a),(d)) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
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