Commitments and Contingencies (Detail) $ in Millions		1 Months Ended			2 Months Ended	3 Months Ended			4 Months Ended	5 Months Ended			6 Months Ended		7 Months Ended		8 Months Ended	9 Months Ended	10 Months Ended	12 Months Ended	22 Months Ended	27 Months Ended
	Mar. 02, 2015 Computers Residents	Jan. 18, 2016 USD ($) Claims	Apr. 30, 2014 Agencies	Jan. 31, 2014 Claims	Mar. 09, 2011 USD ($) Claims	Sep. 30, 2016 States	Jun. 30, 2016 USD ($)	Mar. 31, 2016 USD ($)	May 05, 2016 USD ($)	Jun. 10, 2015 USD ($)	May 21, 2015	Jun. 06, 2011 Beneficiary	Jul. 13, 2016 USD ($)	Jun. 27, 2016	Aug. 04, 2016 USD ($)	Jul. 25, 2012 Employee	Sep. 13, 2012 Employee	Sep. 30, 2016 USD ($) States	Nov. 03, 2015	Dec. 31, 2015 USD ($)	Nov. 10, 2009 Claims	Mar. 31, 2010 Beneficiary	Sep. 30, 2015 USD ($)
Commitments and Contingencies Disclosure [Line Items]
Health insurance retention limit																		$ 0.9
Workers' compensation insurance retention limit																		0.5
Professional liability insurance retention limit																		$ 0.3
Corporate Integrity Agreement Term						5 years
Number Of States With Facilities | States						34												34
Wage and Hour Litigation [Member] | Illinois [Member]
Commitments and Contingencies Disclosure [Line Items]
Number of former employees who filled a putative collective and class action complaint | Employee																	1
Loss Contingency, Settlement Agreement, Consideration															$ 0.8
Loss Contingency Accrual																		$ 0.8
Wage and Hour Litigation [Member] | Connecticut [Member]
Commitments and Contingencies Disclosure [Line Items]
Number of former employees who filled a putative collective and class action complaint | Employee																3
Loss Contingency, Settlement Agreement, Consideration										$ 8.0
Loss Contingency Accrual, at Carrying Value																				$ 5.3			$ 8.0
Payments For Legal Settlements								$ 5.3
OIG Self-Disclosure [Member]
Commitments and Contingencies Disclosure [Line Items]
Loss Contingency, Settlement Agreement, Consideration									$ 4.7
Loss Contingency Accrual																				$ 4.7
Payments For Legal Settlements							$ 4.7
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
Home Health [Member] | Ohio [Member]
Commitments and Contingencies Disclosure [Line Items]
Number of claims submitted by subsidiary | Claims																					137
Recovery amount of the overpayment made to the subsidiary													$ 0.2
Payments For Legal Settlements													$ 0.2
Home Health [Member] | Extrapolated [Member] | Ohio [Member]
Commitments and Contingencies Disclosure [Line Items]
Number of claims submitted by subsidiary | Claims					114
Recovery amount of the overpayment made to the subsidiary					$ 5.6
Home Health [Member] | Unfavorable [Member] | Ohio [Member]
Commitments and Contingencies Disclosure [Line Items]
Number of claims submitted by subsidiary | Claims				28
Home Health [Member] | Favorable In Full [Member] | Ohio [Member]
Commitments and Contingencies Disclosure [Line Items]
Number of claims submitted by subsidiary | Claims				76
Number of claims appealed | Claims				74
Home Health [Member] | Favorable In Part [Member] | Ohio [Member]
Commitments and Contingencies Disclosure [Line Items]
Number of claims submitted by subsidiary | Claims				10
Number of claims appealed | Claims				8
Home Health [Member] | Frontier Litigation [Member]
Commitments and Contingencies Disclosure [Line Items]
Number Of Care Centers Sold | Agencies			5
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		$ 3.7
Recovery Amount Of Over Payment Made To Subsidiary Including Interest		$ 5.6
Recovery Amount Of Over Payment Made To Subsidiary Including Interest Withheld							$ 5.7
Hospice [Member] | Frontier Litigation [Member]
Commitments and Contingencies Disclosure [Line Items]
Number Of Care Centers Sold | Agencies			4
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