Commitments and Contingencies (Detail) $ in Thousands		1 Months Ended	3 Months Ended		5 Months Ended		6 Months Ended			8 Months Ended	10 Months Ended	27 Months Ended	74 Months Ended
	Mar. 02, 2015 Computers Residents	Jan. 18, 2016 USD ($) Claims	Jun. 30, 2017 USD ($) Agencies States	Jun. 30, 2016 USD ($)	May 21, 2015	Jun. 06, 2011 Beneficiary	Jun. 30, 2017 USD ($) Agencies States D	Jun. 30, 2016 USD ($)	Jun. 27, 2016	Aug. 19, 2016	Nov. 03, 2015	Mar. 31, 2010 Beneficiary	Sep. 30, 2011 D	Dec. 31, 2016 USD ($)
Commitments And Contingencies Disclosure [Line Items]
Health insurance retention limit							$ 900
Workers' compensation insurance retention limit							500
Professional liability insurance retention limit							$ 300
Corporate Integrity Agreement Term			5 years
Number Of States With Facilities | States			34				34
Episode Of Care As Episodic Based Revenue | D							60
Securities Class Action Lawsuit settlement, net			$ 28,712	$ 0			$ 28,712	$ 0
Accounts Receivable Net Current			173,388				173,388							$ 166,056
Computer Inventory And Data Security Reporting [Member]
Commitments And Contingencies Disclosure [Line Items]
Number of Missing Computers and Laptops | Computers	142
Threshold of Individuals in Data Breach | Residents	500
Computer Inventory And Data Security Reporting [Member] | Minimum [Member]
Commitments And Contingencies Disclosure [Line Items]
Year of Departure	2011
Computer Inventory And Data Security Reporting [Member] | Maximum [Member]
Commitments And Contingencies Disclosure [Line Items]
Year of Departure	2014
Securities Class Action Lawsuit [Member]
Commitments And Contingencies Disclosure [Line Items]
Loss Contingency Accrual							43,700
Loss Contingency Number Of Defendants													7
Episode Of Care As Episodic Based Revenue | D													60
Settlement Amount To Be Paid By Company's Insurance Carriers			$ 15,000				$ 15,000
Securities Class Action Lawsuit [Member] | Favorable [Member]
Commitments And Contingencies Disclosure [Line Items]
Loss Contingency Number Of Defendants										2
Securities Class Action Lawsuit [Member] | Unfavorable [Member]
Commitments And Contingencies Disclosure [Line Items]
Loss Contingency Number Of Defendants										4
Securities Class Action Lawsuit [Member] | Favorable In Part [Member]
Commitments And Contingencies Disclosure [Line Items]
Loss Contingency Number Of Defendants										3
Home Health [Member]
Commitments And Contingencies Disclosure [Line Items]
Operating Care Centers | Agencies			329				329
Securities Class Action Lawsuit settlement, net			$ 0				$ 0
Home Health [Member] | SafeGuard Zone Program Integrity Contractor [Member] | Florida [Member] | Infinity Home Care, L.L.C. [Member]
Commitments And Contingencies Disclosure [Line Items]
Accounts Receivable Net Current			$ 7,600				$ 7,600
Hospice [Member]
Commitments And Contingencies Disclosure [Line Items]
Operating Care Centers | Agencies			81				81
Securities Class Action Lawsuit settlement, net			$ 0				$ 0
Hospice [Member] | South Carolina [Member]
Commitments And Contingencies Disclosure [Line Items]
Number of beneficiaries | Beneficiary												30
Hospice [Member] | Extrapolated [Member] | South Carolina [Member]
Commitments And Contingencies Disclosure [Line Items]
Number of beneficiaries | Beneficiary						16
Hospice [Member] | Unfavorable [Member] | South Carolina [Member]
Commitments And Contingencies Disclosure [Line Items]
Number of claims submitted by subsidiary | Claims		9
Recovery amount of the overpayment made to the subsidiary		$ 3,700
Recovery Amount Of Over Payment Made To Subsidiary Including Interest		$ 5,600
Recovery amount of over payment made to subsidiary including interest withheld				$ 5,700				$ 5,700
Indemnity Receivable			$ 4,900				$ 4,900
Hospice [Member] | U.S. Department of Justice [Member] | Massachusetts [Member]
Commitments And Contingencies Disclosure [Line Items]
Number of patients					53
Hospice [Member] | U.S. Department of Justice [Member] | Morgantown, West Virginia [Member]
Commitments And Contingencies Disclosure [Line Items]
Number of patients											66
Hospice [Member] | U.S. Department of Justice [Member] | Parkersburg, West Virginia [Member]
Commitments And Contingencies Disclosure [Line Items]
Number of patients									68