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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.

X

- 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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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	us-gaap_SegmentReportingInformationLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration