Goodwill and Other Intangibles, Net - Schedule of Changes in Goodwill by Segment (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Goodwill
Balance at beginning of period	$ 1,259,147	$ 1,219,972
Acquisitions	489,221	33,272
Noncontrolling interest	78	6,827
Adjustments and disposals	(20)	(924)
Balance at end of period	1,748,426	1,259,147
Intangibles Assets
Balance at beginning of period	315,355	305,556
Acquisitions	87,420	11,532
Amortization	(1,494)	(1,228)
Adjustments and disposals	(1,279)	(505)
Balance at end of period	400,002	315,355
Home Health
Goodwill
Balance at beginning of period	884,000	867,924
Acquisitions	84,377	12,025
Noncontrolling interest	78	4,695
Adjustments and disposals	(20)	(644)
Balance at end of period	968,435	884,000
Intangibles Assets
Balance at beginning of period	226,004	219,872
Acquisitions	13,734	7,193
Amortization	(480)	(556)
Adjustments and disposals	(1,279)	(505)
Balance at end of period	237,979	226,004
Hospice
Goodwill
Balance at beginning of period	151,742	128,875
Acquisitions	404,590	21,025
Noncontrolling interest	0	2,122
Adjustments and disposals	0	(280)
Balance at end of period	556,332	151,742
Intangibles Assets
Balance at beginning of period	44,732	40,590
Acquisitions	73,026	4,212
Amortization	(418)	(70)
Adjustments and disposals	0	0
Balance at end of period	117,340	44,732
Home and community- based
Goodwill
Balance at beginning of period	166,773	166,629
Acquisitions	254	134
Noncontrolling interest		10
Adjustments and disposals	0	0
Balance at end of period	167,027	166,773
Intangibles Assets
Balance at beginning of period	24,208	24,096
Acquisitions	46	127
Amortization	(9)	(15)
Adjustments and disposals	0	0
Balance at end of period	24,245	24,208
Facility-based
Goodwill
Balance at beginning of period	15,770	15,682
Acquisitions	0	88
Noncontrolling interest	0
Adjustments and disposals	0	0
Balance at end of period	15,770	15,770
Intangibles Assets
Balance at beginning of period	5,311	5,317
Acquisitions	614	0
Amortization	(6)	(6)
Adjustments and disposals	0	0
Balance at end of period	5,919	5,311
HCI
Goodwill
Balance at beginning of period	40,862	40,862
Acquisitions	0	0
Noncontrolling interest	0	0
Adjustments and disposals	0
Balance at end of period	40,862	40,862
Intangibles Assets
Balance at beginning of period	15,100	15,681
Acquisitions	0	0
Amortization	(581)	(581)
Adjustments and disposals	0	0
Balance at end of period	$ 14,519	$ 15,100