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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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