Discontinued Operations and Assets Held For Sale - Additional Information (Detail) - Agencies	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Home Health [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Number of care centers consolidated	21
Number of care centers closed	22
Home Health [Member] | Assets Held-for-sale [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Number of care centers consolidated	1
Number of care centers available for sale		3
Number of care centers sold	2
Hospice [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Number of care centers consolidated	4
Number of care centers closed	4