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Earnings Per Share Data ("EPS") and Stock Based Compensation (Tables) | 3 Months Ended
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Mar. 31, 2013
Computation of Basic and Diluted Earnings per Share | The following table sets forth the computation of basic and diluted earnings per share for the periods indicated (in thousands, except per share data):
|  | Three months ended March 31, |
|  | 2013 |  |  | 2012 |
Basic and Diluted: |  |  |  |  |  |  |  |
Net income attributable to UHS |  | $ | 119,784 |  |  | $ | 128,607 |
Less: Net income attributable to unvested restricted share grants |  |  | (69 | ) |  |  | (168 | )
Net income attributable to UHS – basic and diluted |  | $ | 119,715 |  |  | $ | 128,439 |
Weighted average number of common shares—basic |  |  | 97,711 |  |  |  | 96,593 |
Net effect of dilutive stock options and grants based on the treasury stock method |  |  | 860 |  |  |  | 1,198 |
Weighted average number of common shares and equivalents—diluted |  |  | 98,571 |  |  |  | 97,791 |
Earnings per basic share attributable to UHS: |  | $ | 1.23 |  |  | $ | 1.33 |
Earnings per diluted share attributable to UHS: |  | $ | 1.21 |  |  | $ | 1.31 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
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