Revenue Recognition (Schedule Of Cost Of Charity Care) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2012	Mar. 31, 2011
Revenue Recognition [Abstract]
Charity care cost	$ 2,250	$ 1,760

The amount of charity care provided during the period based on the provider's direct and indirect costs of providing charity care services.

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

-Publisher FASB

-Name Accounting Standards Codification

-Section 50

-Paragraph 3

-SubTopic 605

-Topic 954

-URI http://asc.fasb.org/extlink&oid=6963661&loc=d3e8255-115641

Name:	us-gaap_CharityCareDirectAndIndirectCostBasisAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration