Acquisitions and Disposals - Additional Information (Detail) $ in Thousands	6 Months Ended
	Jun. 30, 2016 USD ($) Agency
Business Acquisition [Line Items]
Business Combination, Consideration Transferred	$ 11,500
Cash paid for acquisitions, primarily goodwill and intangible assets	11,442
Other	$ 273
Home health services
Business Acquisition [Line Items]
Number of entities acquired | Agency	5
Home health reporting unit [Member]
Business Acquisition [Line Items]
Goodwill, Acquired During Period	$ 1,400
Hospice reporting unit
Business Acquisition [Line Items]
Number of entities acquired | Agency	7
Goodwill, Acquired During Period	$ 5,400
Other	$ 273