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Earnings Per Share Data ("EPS") and Stock Based Compensation (Tables) | 3 Months Ended
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Mar. 31, 2018
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |
Computation of Basic and Diluted Earnings per Share for Classes A, B, C and D Common Stockholders | The following table sets forth the computation of basic and diluted earnings per share for classes A, B, C and D common stockholders for the periods indicated (in thousands, except per share data):
|  | Three months ended March 31, |
|  | 2018 |  |  | 2017 |
Basic and Diluted: |  |  |  |  |  |  |  |
Net income attributable to UHS |  | $ | 223,832 |  |  | $ | 206,055 |
Less: Net income attributable to unvested restricted share grants |  |  | (104 | ) |  |  | (94 | )
Net income attributable to UHS – basic and diluted |  | $ | 223,728 |  |  | $ | 205,961 |
Weighted average number of common shares - basic |  |  | 94,226 |  |  |  | 96,585 |
Net effect of dilutive stock options and grants based on the treasury stock method |  |  | 457 |  |  |  | 787 |
Weighted average number of common shares and equivalents - diluted |  |  | 94,683 |  |  |  | 97,372 |
Earnings per basic share attributable to UHS: |  | $ | 2.37 |  |  | $ | 2.13 |
Earnings per diluted share attributable to UHS: |  | $ | 2.36 |  |  | $ | 2.12 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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