Acquisitions and Disposals - Additional Information (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2016 USD ($) Agency
Business Acquisition [Line Items]
Business Combination, Consideration Transferred	$ 10,800
Cash paid for acquisitions, primarily goodwill and intangible assets	10,504
Other	$ 273
Home health services
Business Acquisition [Line Items]
Number of entities acquired | Agency	3
Home health reporting unit [Member]
Business Acquisition [Line Items]
Goodwill, Acquired During Period	$ 700
Hospice reporting unit
Business Acquisition [Line Items]
Number of entities acquired | Agency	6
Goodwill, Acquired During Period	$ 5,100
Other	$ 273
Minimum
Business Acquisition [Line Items]
Non-compete Agreement Amortization Period, Years	one
Maximum
Business Acquisition [Line Items]
Non-compete Agreement Amortization Period, Years	three