Significant Accounting Policies - Percentage of Net Service Revenue Contributed from Each Reporting Segment (Detail) (Sales Revenue, Segment [Member])	3 Months Ended
Mar. 31, 2014	Mar. 31, 2013
Health Care Organization, Revenue [Abstract]
Percentage of net service revenue	100.00%	100.00%
Home-based services [Member]
Health Care Organization, Revenue [Abstract]
Percentage of net service revenue	78.60%	79.70%
Hospice-based services [Member]
Health Care Organization, Revenue [Abstract]
Percentage of net service revenue	9.30%	8.00%
Facility-based services [Member]
Health Care Organization, Revenue [Abstract]
Percentage of net service revenue	12.10%	12.30%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 21

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13537-108611

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

-SubTopic 10

-Section 50

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13531-108611

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

-SubTopic 10

-Section 50

-Paragraph 18

-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592

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