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Summary Of Significant Accounting Policies (Schedule Of Net Patient Service Revenue By Specialties And Subspecialties) (Details) | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
--- | --- | --- | ---
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net patient service revenue in percentage | 100.00% |  | 100.00% |  | 100.00% |
Neonatal And Other Pediatric Subspecialties [Member] |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net patient service revenue in percentage | 60.00% |  | 65.00% |  | 66.00% |
Anesthesia [Member] |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net patient service revenue in percentage | 21.00% | [1] | 16.00% | [1] | 14.00% | [1]
Maternal-Fetal [Member] |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net patient service revenue in percentage | 13.00% |  | 13.00% |  | 13.00% |
Pediatric Cardiology [Member] |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net patient service revenue in percentage | 6.00% |  | 6.00% |  | 7.00% |
[1] | Anesthesia includes anesthesia care, anesthesia subspecialty care and pain management.

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- Definition The percentage of net product revenue to total net revenue from the sale of goods as of year end. + References No definition available. + Details
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