Acquisitions and Disposals - Schedule of Acquired Entities (Detail)	12 Months Ended
	Dec. 31, 2014
Lanier Home Health [Member]
Business Acquisition [Line Items]
Ownership Percentage	75.00%
State of Operations	Alabama
Acquisition Date	Feb. 01, 2014
Lifeline Home Health [Member]
Business Acquisition [Line Items]
Ownership Percentage	100.00%
State of Operations	Kentucky
Acquisition Date	Feb. 01, 2014
Louisiana Hospice And Palliative Care Of New Orleans [Member]
Business Acquisition [Line Items]
Ownership Percentage	100.00%
State of Operations	Louisiana
Acquisition Date	Mar. 01, 2014
West Virginia Home Health [Member]
Business Acquisition [Line Items]
Ownership Percentage	100.00%
State of Operations	West Virginia
Acquisition Date	Apr. 01, 2014
St Josephs Hospice [Member]
Business Acquisition [Line Items]
Ownership Percentage	100.00%
State of Operations	West Virginia
Acquisition Date	Apr. 01, 2014
North Western Illinois Home Health [Member]
Business Acquisition [Line Items]
Ownership Percentage	100.00%
State of Operations	Illinois
Acquisition Date	Apr. 01, 2014
Deaconess Lifeline Home Health [Member]
Business Acquisition [Line Items]
Ownership Percentage	100.00%
State of Operations	Kentucky
Acquisition Date	Apr. 01, 2014
Deaconess Home Care [Member]
Business Acquisition [Line Items]
Ownership Percentage	100.00%
State of Operations	Mississippi
Acquisition Date	Apr. 01, 2014
Deaconess Home Care One [Member]
Business Acquisition [Line Items]
Ownership Percentage	100.00%
State of Operations	Tennessee
Acquisition Date	Apr. 01, 2014
Deaconess Hospice [Member]
Business Acquisition [Line Items]
Ownership Percentage	100.00%
State of Operations	Mississippi
Acquisition Date	Apr. 01, 2014
Elk Valley Health Services Llc [Member]
Business Acquisition [Line Items]
Ownership Percentage	100.00%
State of Operations	Tennessee
Acquisition Date	Apr. 01, 2014
North Carolina Home Health [Member]
Business Acquisition [Line Items]
Ownership Percentage	100.00%
State of Operations	North Carolina
Acquisition Date	May 01, 2014
Professional Nursing Services [Member]
Business Acquisition [Line Items]
Ownership Percentage	100.00%
State of Operations	North Carolina
Acquisition Date	May 01, 2014
LifeCareatHome [Member]
Business Acquisition [Line Items]
Ownership Percentage	100.00%
State of Operations	Massachusetts
Acquisition Date	Sep. 01, 2014
Life Care at Home of Tennessee One [Member]
Business Acquisition [Line Items]
Ownership Percentage	100.00%
State of Operations	Tennessee
Acquisition Date	Sep. 01, 2014
Life Care at Home One [Member]
Business Acquisition [Line Items]
Ownership Percentage	100.00%
State of Operations	Utah
Acquisition Date	Sep. 01, 2014
Life Care at Home Two [Member]
Business Acquisition [Line Items]
Ownership Percentage	100.00%
State of Operations	Arizona
Acquisition Date	Sep. 01, 2014
At Home Healthcare One [Member]
Business Acquisition [Line Items]
Ownership Percentage	100.00%
State of Operations	Colorado
Acquisition Date	Sep. 01, 2014
Life Care at Home Three [Member]
Business Acquisition [Line Items]
Ownership Percentage	100.00%
State of Operations	Washington
Acquisition Date	Sep. 01, 2014
Life Care Rhode Island [Member]
Business Acquisition [Line Items]
Ownership Percentage	100.00%
State of Operations	Rhode Island
Acquisition Date	Nov. 01, 2014
Troy Regional Medical Center Home Health [Member]
Business Acquisition [Line Items]
Ownership Percentage	54.00%
State of Operations	Alabama
Acquisition Date	Nov. 01, 2014