Goodwill and Intangibles - Additional Information (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Indefinite-lived Intangible Assets [Line Items]
Document Period End Date	Sep. 30, 2017
Intangible assets, net carrying amount	$ 130,779		$ 102,006
Amortization of Intangible Assets	1,600	$ 1,800
Home health services
Indefinite-lived Intangible Assets [Line Items]
Intangible assets, net carrying amount	87,800
Hospice Services
Indefinite-lived Intangible Assets [Line Items]
Intangible assets, net carrying amount	31,800
Community-based services
Indefinite-lived Intangible Assets [Line Items]
Intangible assets, net carrying amount	9,000
Facility-based services
Indefinite-lived Intangible Assets [Line Items]
Intangible assets, net carrying amount	$ 2,200