COMMITMENTS AND CONTINGENCIES - Narrative (Details) $ in Thousands							1 Months Ended	3 Months Ended		27 Months Ended
	Jun. 27, 2016 patient	Jan. 18, 2016 USD ($) claim	Nov. 03, 2015 patient	May 21, 2015 patient	Apr. 23, 2014	Jun. 06, 2011 beneficiary	Aug. 31, 2017 USD ($) claim	Mar. 31, 2018 USD ($)	Sep. 30, 2017 USD ($)	Mar. 31, 2010 beneficiary	Dec. 31, 2017 USD ($)
Loss Contingencies [Line Items]
Corporate integrity agreement term (years)					5 years
Patient accounts receivable, net								$ 192,936			$ 201,196
Health insurance retention limit								1,000
Workers compensation insurance retention limit								500
Professional liability insurance retention limit								300
Clinical Audit
Loss Contingencies [Line Items]
Loss contingency accrual								1,300
South Carolina | Hospice
Loss Contingencies [Line Items]
Number of beneficiaries | beneficiary										30
Indemnity receivable related to amounts withheld prior to August 2009								4,900
South Carolina | Hospice | Extrapolated
Loss Contingencies [Line Items]
Number of beneficiaries | beneficiary						16
South Carolina | Hospice | Unfavorable
Loss Contingencies [Line Items]
Recovery amount of overpayment made to subsidiary		$ 3,700
Recovery amount of overpayment made to subsidiary including interest		$ 5,600
Number of claims submitted by subsidiary | claim		9
Recovery amount of over payment made to subsidiary including interest withheld								5,700
US Department of Justice | Massachusetts | Hospice
Loss Contingencies [Line Items]
Number of patients | patient				53
US Department of Justice | Morgantown, West Virginia | Hospice
Loss Contingencies [Line Items]
Number of patients | patient			66
US Department of Justice | Parkersburg, West Virginia | Hospice
Loss Contingencies [Line Items]
Number of patients | patient	68
Safeguard Zone Program Integrity Contractor | Florida
Loss Contingencies [Line Items]
Loss contingency accrual								17,400
Indemnity receivable								10,900
Indemnification amount								12,600
Safeguard Zone Program Integrity Contractor | Florida | Infinity HomeCare
Loss Contingencies [Line Items]
Indemnification amount								12,600
Safeguard Zone Program Integrity Contractor | Florida | Home Health
Loss Contingencies [Line Items]
Florida ZPIC revenue reduction									$ 6,500
Safeguard Zone Program Integrity Contractor | Florida | Home Health | Minimum
Loss Contingencies [Line Items]
Recovery amount of overpayment made to subsidiary								6,500
Safeguard Zone Program Integrity Contractor | Florida | Home Health | Maximum
Loss Contingencies [Line Items]
Recovery amount of overpayment made to subsidiary							$ 38,800	30,300
Safeguard Zone Program Integrity Contractor | Florida | Home Health | Infinity HomeCare
Loss Contingencies [Line Items]
Patient accounts receivable, net								4,800
Safeguard Zone Program Integrity Contractor | Lakeland, Florida | Home Health
Loss Contingencies [Line Items]
Recovery amount of overpayment made to subsidiary							$ 34,000	27,000
Number of claims submitted by subsidiary | claim							72
Actual claims payment							$ 200
Error rate (percent)							100.00%
Safeguard Zone Program Integrity Contractor | Clearwater, Florida | Home Health
Loss Contingencies [Line Items]
Recovery amount of overpayment made to subsidiary							$ 4,800	$ 3,300
Number of claims submitted by subsidiary | claim							70
Actual claims payment							$ 200
Error rate (percent)							100.00%