Goodwill and Intangibles - Schedule of Changes in Recorded Goodwill by Reporting Unit (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015
Goodwill [Roll Forward]
Balance at beginning of period	$ 240,019us-gaap_Goodwill
Goodwill from acquisitions	343us-gaap_GoodwillAcquiredDuringPeriod
Goodwill related to noncontrolling interests	36
Goodwill related to disposal	(104)
Balance at end of period	240,294us-gaap_Goodwill
Home health reporting unit
Goodwill [Roll Forward]
Balance at beginning of period	196,296
Goodwill from acquisitions	138
Goodwill related to noncontrolling interests	14
Goodwill related to disposal	(104)
Balance at end of period	196,344
Hospice reporting unit
Goodwill [Roll Forward]
Balance at beginning of period	14,793
Goodwill from acquisitions	0
Goodwill related to noncontrolling interests	0
Goodwill related to disposal	0
Balance at end of period	14,793
Community-based reporting unit
Goodwill [Roll Forward]
Balance at beginning of period	17,339
Goodwill from acquisitions	205
Goodwill related to noncontrolling interests	22
Goodwill related to disposal	0
Balance at end of period	17,566
Facility-based reporting unit
Goodwill [Roll Forward]
Balance at beginning of period	11,591
Goodwill from acquisitions	0
Goodwill related to noncontrolling interests	0
Goodwill related to disposal	0
Balance at end of period	$ 11,591

Amount of goodwill arising from a business combination that is attributable to the noncontrolling interest in the acquiree.

No definition available.

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Period Type:	duration

- Definition

Amount of closure of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

No definition available.

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- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

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- Definition

Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267

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