Goodwill and Intangibles - Schedule of Changes in Recorded Goodwill by Reporting Unit (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2017 USD ($)
Goodwill [Roll Forward]
Balance at beginning of period	$ 307,317
Goodwill from acquisitions	50,797
Goodwill related to noncontrolling interests	34,313
Change in Goodwill Related to Disposal	(80)
Other	342
Balance at end of period	392,689
Home health reporting unit [Member]
Goodwill [Roll Forward]
Balance at beginning of period	210,839
Goodwill from acquisitions	29,448
Goodwill related to noncontrolling interests	20,781
Change in Goodwill Related to Disposal	(80)
Other	(5)
Balance at end of period	260,983
Hospice reporting unit
Goodwill [Roll Forward]
Balance at beginning of period	64,234
Goodwill from acquisitions	15,188
Goodwill related to noncontrolling interests	9,674
Balance at end of period	89,096
Community-based reporting unit
Goodwill [Roll Forward]
Balance at beginning of period	18,820
Goodwill from acquisitions	4,285
Goodwill related to noncontrolling interests	2,856
Balance at end of period	25,961
Facility-based reporting unit
Goodwill [Roll Forward]
Balance at beginning of period	13,424
Goodwill from acquisitions	1,876
Goodwill related to noncontrolling interests	1,002
Other	347
Balance at end of period	$ 16,649