Commitments and Contigencies (Detail) (USD $)	12 Months Ended	9 Months Ended	7 Months Ended	0 Months Ended	22 Months Ended	2 Months Ended	1 Months Ended	27 Months Ended	5 Months Ended
	Dec. 31, 2014 States	Sep. 13, 2012 Employee	Jul. 25, 2012 Employee	Mar. 02, 2015 Computers Residents Patients	Nov. 10, 2009 Claims	Mar. 09, 2011 Claims	Jan. 31, 2014 Claims	Mar. 31, 2010 Beneficiary	Jun. 06, 2011 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
Number Of States With Facilities	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		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			3
Computer Inventory And Data Security Reporting [Member]
Commitments and Contingencies Disclosure [Line Items]
Number of Individuals With Information on Missing Devices				6,909
Number of Missing Computers and Laptops				142
Threshold of Individuals in Data Breach				500
Percentage Of Company Devices Used				0.30%
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					137
Home Health [Member] | Extrapolated [Member] | Ohio [Member]
Commitments and Contingencies Disclosure [Line Items]
Number of claims submitted by subsidiary						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							28
Home Health [Member] | Favorable In Full [Member] | Ohio [Member]
Commitments and Contingencies Disclosure [Line Items]
Number of claims submitted by subsidiary							76
Number of claims appealed							74
Home Health [Member] | Favorable In Part [Member] | Ohio [Member]
Commitments and Contingencies Disclosure [Line Items]
Number of claims submitted by subsidiary							10
Number of claims appealed							8
Hospice [Member] | South Carolina [Member]
Commitments and Contingencies Disclosure [Line Items]
Number of beneficiaries								30
Hospice [Member] | Extrapolated [Member] | South Carolina [Member]
Commitments and Contingencies Disclosure [Line Items]
Recovery amount of the overpayment made to the subsidiary									$ 6,100,000
Number of beneficiaries									16