Goodwill and Intangibles - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2017	Dec. 31, 2018
Indefinite-lived Intangible Assets [Line Items]
Other intangible impairment charge	$ 6,319	$ 0
Disposal of goodwill and intangible assets	300
Intangible assets, net carrying amount	291,954			$ 297,379
Home health services
Indefinite-lived Intangible Assets [Line Items]
Other intangible impairment charge	6,318
Intangible assets, net carrying amount	233,400
Hospice services
Indefinite-lived Intangible Assets [Line Items]
Other intangible impairment charge	1
Intangible assets, net carrying amount	32,300
Home and community-based services
Indefinite-lived Intangible Assets [Line Items]
Other intangible impairment charge	0
Intangible assets, net carrying amount	10,300
Facility-based services
Indefinite-lived Intangible Assets [Line Items]
Other intangible impairment charge	0
Intangible assets, net carrying amount	4,100
HCI reporting unit
Indefinite-lived Intangible Assets [Line Items]
Other intangible impairment charge	0
Intangible assets, net carrying amount	11,800
Certificates of need/licenses
Indefinite-lived Intangible Assets [Line Items]
Other intangible impairment charge	$ 6,000
Trade Names
Indefinite-lived Intangible Assets [Line Items]
Estimated useful life	8 years 6 months 30 days		8 years 9 months 18 days
Customer relationships
Indefinite-lived Intangible Assets [Line Items]
Estimated useful life	19 years
Non-compete agreements
Indefinite-lived Intangible Assets [Line Items]
Estimated useful life	2 years 9 months 18 days		19 years 3 months 18 days