Goodwill and Intangibles - Additional Information (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Indefinite-lived Intangible Assets [Line Items]
Disposal of goodwill and intangible assets	$ 1,100
Intangible assets, net carrying amount	301,411	$ 134,610
Home health services
Indefinite-lived Intangible Assets [Line Items]
Intangible assets, net carrying amount	217,300
Hospice services
Indefinite-lived Intangible Assets [Line Items]
Intangible assets, net carrying amount	37,000
Home and community-based services
Indefinite-lived Intangible Assets [Line Items]
Intangible assets, net carrying amount	24,000
Facility-based services
Indefinite-lived Intangible Assets [Line Items]
Intangible assets, net carrying amount	4,100
HCI reporting unit
Indefinite-lived Intangible Assets [Line Items]
Intangible assets, net carrying amount	$ 19,000
Trade Names
Indefinite-lived Intangible Assets [Line Items]
Estimated useful life	9 years 1 month 6 days	10 years 3 months
Intangible assets, net carrying amount	$ 1,477	$ 2,580
Customer relationships
Indefinite-lived Intangible Assets [Line Items]
Estimated useful life	19 years 6 months
Intangible assets, net carrying amount	$ 13,513	$ 0
Non-compete agreements
Indefinite-lived Intangible Assets [Line Items]
Estimated useful life	3 years	2 years 1 month
Intangible assets, net carrying amount	$ 228	$ 238