Goodwill and Other Intangibles, Net - Schedule of Changes in Goodwill by Segment (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Goodwill [Roll Forward]
Balance at beginning of period	$ 194,893us-gaap_Goodwill	$ 169,150us-gaap_Goodwill
Goodwill from acquisitions	45,213us-gaap_GoodwillAcquiredDuringPeriod	25,121us-gaap_GoodwillAcquiredDuringPeriod
Goodwill related to noncontrolling interest	(113)	(622)
Balance at end of period	240,019us-gaap_Goodwill	194,893us-gaap_Goodwill
Goodwill related to disposal	200
Home Based Reporting Unit [Member]
Goodwill [Roll Forward]
Balance at beginning of period	173,574	150,350
Goodwill from acquisitions	22,809	22,602
Goodwill related to noncontrolling interest	(113)	(622)
Balance at end of period	196,296	173,574
Goodwill related to disposal	200
Community Based Reporting Unit [Member]
Goodwill [Roll Forward]
Balance at beginning of period	265		265
Goodwill from acquisitions	17,074
Balance at end of period	17,339		265
Hospice Reporting Unit [Member]
Goodwill [Roll Forward]
Balance at beginning of period	9,463	6,944
Goodwill from acquisitions	5,330	2,519
Balance at end of period	14,793	9,463
Facility Based Reporting Unit [Member]
Goodwill [Roll Forward]
Balance at beginning of period			11,591
Balance at end of period	$ 11,591	$ 11,591	$ 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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- 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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- Definition

Amount of divestiture 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

-Subparagraph (d)

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

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