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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
	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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