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Segment Reporting (Schedule Of Financial Information By Operating Segments) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Gross inpatient revenues	$ 4,771,120	$ 4,613,448
Gross outpatient revenues	1,772,045	1,532,582
Total net revenues	1,825,289	1,757,412
Income/(loss) before allocation of corporate overhead and income taxes	222,318	203,996
Allocation of corporate overhead	0	0
Income/(loss) after allocation of corporate overhead and before income taxes	222,318	203,996
Total assets	7,783,281	7,613,074
Acute Care Hospital Services [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Gross inpatient revenues	3,349,035	3,222,247
Gross outpatient revenues	1,598,517	1,370,118
Total net revenues	954,232	922,542
Income/(loss) before allocation of corporate overhead and income taxes	129,848	126,984
Allocation of corporate overhead	(40,743)	(32,806)
Income/(loss) after allocation of corporate overhead and before income taxes	89,105	94,178
Total assets	2,946,334	2,802,225
Behavioral Health Services [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Gross inpatient revenues	1,422,085	1,391,201
Gross outpatient revenues	161,258	149,595
Total net revenues	864,873	828,948
Income/(loss) before allocation of corporate overhead and income taxes	202,496	185,779
Allocation of corporate overhead	(21,061)	(15,725)
Income/(loss) after allocation of corporate overhead and before income taxes	181,435	170,054
Total assets	4,425,079	4,390,677
Other [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Gross outpatient revenues	12,270	12,869
Total net revenues	6,184	5,922
Income/(loss) before allocation of corporate overhead and income taxes	(110,026)	(108,767)
Allocation of corporate overhead	61,804	48,531
Income/(loss) after allocation of corporate overhead and before income taxes	(48,222)	(60,236)
Total assets	$ 411,868	$ 420,172

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- Definition

Assets segment reporting information.

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Gross inpatient revenues.

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- Definition

Gross outpatient revenues.

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No definition available.

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- Definition

Indirect expenses and cost incurred associated with services rendered by an entity during the reporting period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.2(d))

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This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses from ongoing operations, after income or loss from equity method investments, but before income taxes, extraordinary items, and noncontrolling interest.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 5

-Section 03

-Paragraph 10

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Sum of operating profit and nonoperating income or expense before Income or Loss from equity method investments, income taxes, extraordinary items, and noncontrolling interest.

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 4

-Section 08

-Paragraph h

-Subparagraph 1(i)



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-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

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-Section S99

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Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

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