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Earnings Per Share Data ("EPS") And Stock Based Compensation (Schedule Of Computation Of Basic And Diluted Earnings Per Share) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended
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Mar. 31, 2012 | Mar. 31, 2011
Earnings Per Share Data ("EPS") And Stock Based Compensation [Abstract] |  |
Net income attributable to UHS | $ 128,607 | $ 114,193
Less: Net income attributable to unvested restricted share grants | (168) | (149)
Net income attributable to UHS - basic and diluted | $ 128,439 | $ 114,044
Weighted average number of common shares - basic | 96,593 | 97,381
Net effect of dilutive stock options and grants based on the treasury stock method | 1,198 | 1,487
Weighted average number of common shares and equivalents - diluted | 97,791 | 98,868
Earnings per basic share attributable to UHS | $ 1.33 | $ 1.17
Earnings per diluted share attributable to UHS | $ 1.31 | $ 1.15

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