Goodwill And Intangible Assets (Schedule Of Changes In Goodwill By Operating Segment) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Goodwill [Line Items]
Goodwill, Ending Balance	$ 281,981	$ 278,051	$ 224,587
Acquisitions	1,773	53,464
Other adjustments	2,157
Medicaid Managed Care [Member]
Goodwill [Line Items]
Goodwill, Ending Balance	151,402	154,696	111,063
Acquisitions	1,773	43,633
Other adjustments	(5,067)
Specialty Services [Member]
Goodwill [Line Items]
Goodwill, Ending Balance	130,579	123,355	113,524
Acquisitions		9,831
Other adjustments	$ 7,224