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Business Acquisitions (Tables)

6 Months Ended

Jun. 30, 2012

Schedule Of Pro Forma Information That Combines The Consolidated Results Of Company And Business Acquisitions

		Six Months Ended June 30,
		2012				2011
Net patient service revenue		$	889,791			$	862,745
Net income (1)		$	110,309			$	109,666
Net income per share (2):
Basic		$	2.28			$	2.32
Diluted		$	2.23			$	2.26
Weighted average shares (2):
Basic			48,408				47,341
Diluted			49,474				48,547
Effective tax rate (1):			39.0	%			39.5	%

⁽¹⁾  The comparison of net income is affected by the change in the effective tax rate. The effective tax rate was 39.0% for the six months ended June 30, 2012 as compared to 39.5% for the six months ended June 30, 2011.

⁽²⁾  The comparison of net income per share is affected by the changes in the number of weighted average shares outstanding in each period. The basic and diluted weighted average shares outstanding for the six months ended June 30, 2012 were 48.4 million and 49.5 million, respectively, as compared to 47.3 million and 48.5 million, respectively, for the six months ended June 30, 2011.

X

- Definition

Tabular disclosure of pro forma results of operations for a material business acquisition or series of individually immaterial business acquisitions that are material in the aggregate.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(2)-(3)

-URI http://asc.fasb.org/extlink&oid=7659399&loc=d3e1392-128463



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141

-Paragraph 54

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141

-Paragraph 55

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141R

-Paragraph 68

-Subparagraph r(2, 3)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration