Nature Of Operations, Consolidation And Presentation Of Financial Statements (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Nature Of Operations, Consolidation And Presentation Of Financial Statements
Percent of net services revenue provided by Medicare	84.00%	86.00%	85.00%	87.00%
Medicare-certified home health agencies	485		485
Medicare-certified hospice agencies	90		90
Number of states with facilities	45		45
Minimum percent ownership for controlling interest percent	50.00%		50.00%