Goodwill and Intangibles - Schedule of Changes in Recorded Goodwill by Reporting Unit (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2018 USD ($)
Goodwill [Roll Forward]
Balance at beginning of period	$ 392,601
Acquisitions	756,776
Noncontrolling interests	2,820
Adjustments and disposals	35
Balance at end of period	1,152,232
Home health reporting unit
Goodwill [Roll Forward]
Balance at beginning of period	261,456
Acquisitions	543,337
Noncontrolling interests	2,314
Adjustments and disposals	(369)
Balance at end of period	806,738
Hospice reporting unit
Goodwill [Roll Forward]
Balance at beginning of period	88,814
Acquisitions	27,888
Noncontrolling interests	506
Balance at end of period	117,208
Home and community-based services reporting unit
Goodwill [Roll Forward]
Balance at beginning of period	28,541
Acquisitions	142,734
Noncontrolling interests	0
Balance at end of period	171,275
Facility-based reporting unit
Goodwill [Roll Forward]
Balance at beginning of period	13,790
Acquisitions	0
Noncontrolling interests	0
Adjustments and disposals	404
Balance at end of period	14,194
HCI reporting unit
Goodwill [Roll Forward]
Balance at beginning of period	0
Acquisitions	42,817
Noncontrolling interests	0
Adjustments and disposals	0
Balance at end of period	$ 42,817