Segment Information - Additional Information (Details)	3 Months Ended	9 Months Ended
	Sep. 30, 2018 pharmacy clinic	Sep. 30, 2018 pharmacy segment clinic
Segment Reporting Information [Line Items]
Number of reportable segments | segment		5
Number of pharmacies | pharmacy	2	2
Number of physical therapy clinics | clinic	2	2
Services segment revenue | Home health services
Segment Reporting Information [Line Items]
Percentage of net service revenue	72.20%
Services segment revenue | Hospice services
Segment Reporting Information [Line Items]
Percentage of net service revenue	90.50%
Services segment revenue | Home and community-based services
Segment Reporting Information [Line Items]
Percentage of net service revenue	23.40%
Services segment revenue | Facility-based services
Segment Reporting Information [Line Items]
Percentage of net service revenue	59.90%