Goodwill and Intangibles - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Indefinite-lived Intangible Assets [Line Items]
Intangible assets, net carrying amount	$ 134,842		$ 134,610
Amortization of Intangible Assets	400	$ 600
Home health services
Indefinite-lived Intangible Assets [Line Items]
Intangible assets, net carrying amount	88,700
Hospice Services
Indefinite-lived Intangible Assets [Line Items]
Intangible assets, net carrying amount	31,900
Community-based services
Indefinite-lived Intangible Assets [Line Items]
Intangible assets, net carrying amount	9,500
Facility-based services
Indefinite-lived Intangible Assets [Line Items]
Intangible assets, net carrying amount	$ 4,700