Summary of Significant Accounting Policies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014 time Group PeriodicRate	Dec. 31, 2013	Dec. 31, 2012
Summary Of Significant Accounting Policies [Line Items]
License Leasing Arrangements	100.00%
Number of Medicare home health resource groups	153
Number of days from date RAP paid to submit final Medicare bill	60 days
Low utilization adjustment visits	5
Minimum percentage of Medicare reimbursement from inpatient care services that subjects individual programs to inpatient cap	20.00%
Determination period for hospice Medicare inpatient reimbursement cap	12 months
Medicare credit risk for accounts receivable	58.20%	68.60%
Reimbursement for initial episode of care	60.00%
Number of days from start of episode to submit final Medicare bill	120 days
Reimbursement for subsequent episodes of care	50.00%
Disposal Group, Including Discontinued Operation, Goodwill	$ 0.2
Loss on impairment of intangible assets	2.0	0.5	0.7
Disposal Group, Including Discontinued Operation, Intangible Assets, Net	1.4
Depreciation expense	7.5	6.9	6.9
Selected Hospice, Periodic Rate Used to Calculate Revenue	1
Number of Hospice, Periodic Rates Used to Calculate Revenue	4
Hospice Cap Liability	$ 0.8
Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Equity Joint Ventures, Ownership	51.00%
Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Equity Joint Ventures, Ownership	91.00%
Building [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives	39 years
Transportation, Furniture And Other Equipment [Member] | Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives	3 years
Transportation, Furniture And Other Equipment [Member] | Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives	10 years