Discontinued Operations (Narrative) (Details)	3 Months Ended	12 Months Ended
	Mar. 31, 2012	Dec. 31, 2011
Discontinued Operations [Line Items]
Number of care centers closed	3	29
Home Health [Member]
Discontinued Operations [Line Items]
Number of care centers exited	3
Number of care centers consolidated		27
Number of care centers closed		27
Number of prospective unopened locations, start-up process discontinued		2
Hospice [Member]
Discontinued Operations [Line Items]
Number of care centers consolidated		5
Number of care centers closed		2