Summary of Significant Accounting Policies - Additional Information (Detail) $ in Thousands	3 Months Ended			6 Months Ended		12 Months Ended
	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)	Mar. 31, 2015 USD ($)	Jun. 30, 2016 USD ($) D Number_of_Visits	Jun. 30, 2015 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Episode of care as episodic-based revenue, days | D				60
Percentage of total reimbursement of outlier payment				10.00%
Low utilization payment adjustment, maximum number of visits | Number_of_Visits				5
First threshold of therapy services required, visits | Number_of_Visits				6
Second threshold of services required, visits | Number_of_Visits				14
Third threshold of therapy services required, visits | Number_of_Visits				20
Historical collection rate from Medicare				99.00%
Episodes in progress that begin during reporting period, days | D				60
Hospice Medicare revenue rate accounted for routine care	99.00%	98.00%		98.00%	98.00%
Percentage of patient receivables outstanding				10.00%
Minimum days for accounts receivable outstanding to be fully reserved | D				365
Portion of accounts receivable derived from Medicare				59.00%		64.00%
Revenue adjustment to Medicare revenue	$ 2,600	$ 1,100		$ 4,300	$ 2,600
Rate of request for anticipated payment submitted for the initial episode of care				60.00%
Rate of request for anticipated payment submitted for subsequent episodes of care				50.00%
Maximum days to submit final bill from the start of episode | D				120
Maximum days to submit final bill from the date the request for anticipated payment was paid | D				60
Percentage Of Patient Receivables Outstanding Over Ten Percent	10.90%			10.90%
Asset Impairment Charges	$ 0	0	$ 75,200	$ 0	75,193
Property Plant And Equipment [Line Items]
Internally developed computer software							$ 75,800
Unamortized debt issuance costs	(3,000)			(3,000)		$ (3,400)
Home Health [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Asset Impairment Charges	0	0		0	0
Hospice [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Asset Impairment Charges	0	$ 0		0	$ 0
Cap Year Two Thousand Thirteen Through Two Thousand Sixteen [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Estimated amounts due back to Medicare	$ 1,400			$ 1,400		$ 1,400