Goodwill and Intangibles - Schedule of Changes in Recorded Goodwill by Reporting Unit (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2015 USD ($)
Goodwill [Roll Forward]
Balance at beginning of period	$ 240,019
Goodwill from acquisitions	2,190
Goodwill related to noncontrolling interests	36
Goodwill related to disposal	(183)
Balance at end of period	242,062
Home health reporting unit
Goodwill [Roll Forward]
Balance at beginning of period	196,296
Goodwill from acquisitions	560
Goodwill related to noncontrolling interests	14
Goodwill related to disposal	(156)
Balance at end of period	196,714
Community-based reporting unit
Goodwill [Roll Forward]
Balance at beginning of period	14,793
Goodwill from acquisitions	1,426
Goodwill related to noncontrolling interests	0
Goodwill related to disposal	0
Balance at end of period	16,219
Community-based reporting unit
Goodwill [Roll Forward]
Balance at beginning of period	17,339
Goodwill from acquisitions	204
Goodwill related to noncontrolling interests	22
Goodwill related to disposal	(27)
Balance at end of period	17,538
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