COMMITMENTS AND CONTINGENCIES - Narrative (Details) $ in Thousands								1 Months Ended	3 Months Ended			27 Months Ended
	Jan. 10, 2019 USD ($)	Jun. 27, 2016 patient	Jan. 18, 2016 USD ($) claim	Nov. 03, 2015 patient	May 21, 2015 patient	Apr. 23, 2014	Jun. 06, 2011 beneficiary	Aug. 31, 2017 USD ($) claim	Mar. 31, 2019 USD ($)	Mar. 31, 2018 USD ($)	Sep. 30, 2017 USD ($)	Mar. 31, 2010 beneficiary	Dec. 31, 2018 USD ($)	Sep. 30, 2018 USD ($)
Loss Contingencies [Line Items]
Corporate integrity agreement term (years)						5 years
Other General and Administrative Expense									$ 43,402	$ 41,680
Patient accounts receivable									236,437				$ 188,972
Health insurance retention limit									1,300
Workers compensation insurance retention limit									1,000
Professional liability insurance retention limit									300
South Carolina | Hospice
Loss Contingencies [Line Items]
Number of beneficiaries | beneficiary												30
Indemnity receivable related to amounts withheld prior to August 2009									2,800
Indemnity receivable	$ 2,800													$ 4,900
Other General and Administrative Expense	2,100
Indemnification amount	$ 2,800
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
Loss contingency accrual									1,000
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
Idaho and Wyoming Self Report [Member]
Loss Contingencies [Line Items]
Payments for legal settlements									1,300
Loss contingency accrual													$ 1,300
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 [Member]
Loss Contingencies [Line Items]
Recovery amount of overpayment made to subsidiary								6,500
Safeguard Zone Program Integrity Contractor | Florida | Home Health | Maximum [Member]
Loss Contingencies [Line Items]
Recovery amount of overpayment made to subsidiary								38,800	29,300
Safeguard Zone Program Integrity Contractor | Florida | Home Health | Infinity HomeCare
Loss Contingencies [Line Items]
Patient accounts receivable									1,500
Safeguard Zone Program Integrity Contractor | Lakeland, Florida | Home Health
Loss Contingencies [Line Items]
Recovery amount of overpayment made to subsidiary								$ 34,000	26,000
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%
Internal Audit Compliance Review [Member]
Loss Contingencies [Line Items]
Loss contingency accrual									$ 7,100