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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
3 Months Ended 6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2011
Jun. 30, 2010
Earnings per Share Data ("EPS") and Stock Based Compensation        
Net income attributable to UHS $ 103,649 $ 65,572 $ 217,842 $ 137,391
Less: Net income attributable to unvested restricted share grants (126) (278) (275) (593)
Net income attributable to UHS - basic and diluted $ 103,523 $ 65,294 $ 217,567 $ 136,798
Weighted average number of common shares - basic 97,563 96,703 97,472 96,621
Net effect of dilutive stock options and grants based on the treasury stock method 1,695 1,351 1,591 1,131
Weighted average number of common shares and equivalents - diluted 99,258 98,054 99,063 97,752
Earnings per basic share attributable to UHS: $ 1.06 $ 0.68 $ 2.23 $ 1.42
Earnings per diluted share attributable to UHS: $ 1.04 $ 0.67 $ 2.20 $ 1.40