Goodwill and Intangibles - Schedule of Changes in Recorded Goodwill by Reporting Unit (Detail) $ in Thousands	6 Months Ended
	Jun. 30, 2017 USD ($)
Goodwill [Roll Forward]
Balance at beginning of period	$ 307,317
Goodwill from acquisitions	23,307
Goodwill related to noncontrolling interests	14,213
Other	342
Balance at end of period	345,179
Home health reporting unit [Member]
Goodwill [Roll Forward]
Balance at beginning of period	210,839
Goodwill from acquisitions	14,318
Goodwill related to noncontrolling interests	8,844
Other	(5)
Balance at end of period	233,996
Hospice reporting unit
Goodwill [Roll Forward]
Balance at beginning of period	64,234
Goodwill from acquisitions	8,617
Goodwill related to noncontrolling interests	5,369
Balance at end of period	78,220
Community-based reporting unit
Goodwill [Roll Forward]
Balance at beginning of period	18,820
Goodwill from acquisitions	0
Goodwill related to noncontrolling interests	0
Balance at end of period	18,820
Facility-based reporting unit
Goodwill [Roll Forward]
Balance at beginning of period	13,424
Goodwill from acquisitions	372
Goodwill related to noncontrolling interests	0
Other	347
Balance at end of period	$ 14,143