Commitments and Contigencies (Detail)		1 Months Ended			2 Months Ended	5 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	Jun. 10, 2015 USD ($)	May. 21, 2015	Jun. 06, 2011 Beneficiary	Jul. 25, 2012 Employee	Sep. 13, 2012 Employee	Sep. 30, 2015 USD ($)	Nov. 03, 2015	Dec. 31, 2015 USD ($)	Dec. 31, 2014	Dec. 31, 2013 Agencies	Nov. 10, 2009 Claims	Mar. 31, 2010 Beneficiary
Commitments and Contingencies Disclosure [Line Items]
Health insurance retention limit													$ 900,000
Workers' compensation insurance retention limit													500,000
Professional liability insurance retention limit													300,000
Corporate Integrity Agreement Term														5 years
Wage and Hour Litigation [Member]
Commitments and Contingencies Disclosure [Line Items]
Loss Contingency, Settlement Agreement, Consideration						$ 8,000,000
Loss Contingency Accrual											$ 8,000,000		5,300,000
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
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
OIG Self-Disclosure [Member]
Commitments and Contingencies Disclosure [Line Items]
Loss Contingency Accrual													$ 4,700,000
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]
Commitments and Contingencies Disclosure [Line Items]
Number Of Care Centers Sold | Agencies															19
Home Health [Member] | Ohio [Member]
Commitments and Contingencies Disclosure [Line Items]
Number of claims submitted by subsidiary | Claims																137
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					$ 5,600,000
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]
Commitments and Contingencies Disclosure [Line Items]
Number Of Care Centers Sold | Agencies															1
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		$ 3,700,000
Recovery amount of overpayment made to subsidiary including interest		$ 5,600,000
Hospice [Member] | Frontier Litigation [Member]
Commitments and Contingencies Disclosure [Line Items]
Number Of Care Centers Sold | Agencies			4
Hospice [Member] | US Department of Justice [Member]
Commitments and Contingencies Disclosure [Line Items]
Number of patients							53					66