Nature Of Operations, Consolidation And Presentation Of Financial Statements (Details)	3 Months Ended		12 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Dec. 31, 2011
Nature Of Operations, Consolidation And Presentation Of Financial Statements [Abstract]
Percent of net services revenue provided by Medicare	83.00%	85.00%
Medicare-certified home health care centers	437
Medicare-certified hospice agencies	88
Hospice inpatient units	2
Number of states with facilities	38
Number of care centers closed	3		29
Minimum percent ownership for controlling interest percent	50.00%