ACQUISITIONS - Narrative (Details) $ in Thousands							3 Months Ended		6 Months Ended	9 Months Ended
	Aug. 01, 2021 USD ($)	Jul. 12, 2021 USD ($)	Jul. 01, 2021 USD ($)	May 01, 2021 USD ($)	Oct. 01, 2020 USD ($)	Jun. 01, 2020 USD ($) care_center	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Jun. 30, 2021 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)
Business Acquisition [Line Items]
Net service revenue							$ 553,485	$ 544,070		$ 1,654,795	$ 1,520,814
Operating Income (Loss)							56,772	63,313		203,756	157,115
Hospice [Member]
Business Acquisition [Line Items]
Net service revenue							197,500	199,700		586,900	546,200
Operating Income (Loss)							39,700	48,900		132,100	132,900
Hospice [Member] | AseraCare Hospice [Member]
Business Acquisition [Line Items]
Payments to acquire business						$ 230,400
Acquisition, number of care centers acquired | care_center						44
Payments related to tax asset						$ 32,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables									$ 15,300
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense									700
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment									600
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Operating lease right of use assets									5,900
Acquisition, other intangibles recorded									24,300
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets									100
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets									46,900
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable									(6,300)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Payroll and Employee Benefits									(5,900)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accrued Expenses									(11,900)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Operating Lease Liabilities									(5,400)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities									(29,500)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net									17,400
Goodwill recorded during period									212,200
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net									$ 229,600
Business Acquisition Closing Payment Adjustment					$ 800
GoodwillDeductibleForIncomeTaxPurposesPeriod						15 years
Hospice [Member] | AseraCare Hospice [Member] | Maximum [Member]
Business Acquisition [Line Items]
Business Acquisition Closing Payment Adjustment						$ 1,000
Home Health [Member]
Business Acquisition [Line Items]
Net service revenue							338,600	326,000		1,016,500	919,800
Operating Income (Loss)							65,000	68,800		213,200	164,100
Home Health and Hospice [Member] | Visiting Nurse Association
Business Acquisition [Line Items]
Payments to acquire business			$ 20,100
Goodwill recorded during period							19,400
High Acuity Care
Business Acquisition [Line Items]
Net service revenue							1,500	0		1,500	0
Operating Income (Loss)							(3,800)	$ 0		(3,800)	$ 0
High Acuity Care | Contessa Health
Business Acquisition [Line Items]
Payments to acquire business	$ 240,700
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables							1,500			1,500
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense							300			300
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other							100			100
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment							300			300
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Operating lease right of use assets							800			800
Acquisition, other intangibles recorded							55,200			55,200
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets							3,300			3,300
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets							61,500			61,500
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable							(100)			(100)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Payroll and Employee Benefits							(600)			(600)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accrued Expenses							(3,400)			(3,400)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Operating Lease Liabilities							(800)			(800)
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities							(3,100)			(3,100)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Long-term Debt							(900)			(900)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other							(200)			(200)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities							(9,100)			(9,100)
Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Fair Value							(42,100)			(42,100)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Equity							(42,100)			(42,100)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities and Equity							(51,200)			(51,200)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net							10,300			10,300
Goodwill recorded during period										230,400
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net							240,700			$ 240,700
Net service revenue							1,500
Operating Income (Loss)							(3,800)
Depreciation and amortization							500
NORTH CAROLINA | Home Health [Member]
Business Acquisition [Line Items]
Payments to acquire business				$ 2,500
Goodwill recorded during period							2,400
NEW YORK | Home Health [Member]
Business Acquisition [Line Items]
Payments to acquire business		$ 1,500
Goodwill recorded during period							$ 1,400
Noncompete Agreements [Member] | Hospice [Member] | AseraCare Hospice [Member]
Business Acquisition [Line Items]
Weighted-average amortization period						1 year 8 months 12 days
Acquisition, other intangibles recorded						$ 9,200
Noncompete Agreements [Member] | High Acuity Care | Contessa Health
Business Acquisition [Line Items]
Weighted-average amortization period	2 years
Acquisition, other intangibles recorded	$ 6,700
Acquired Names [Member] | Hospice [Member] | AseraCare Hospice [Member]
Business Acquisition [Line Items]
Weighted-average amortization period						2 years
Acquisition, other intangibles recorded						$ 5,700
Acquired Names [Member] | High Acuity Care | Contessa Health
Business Acquisition [Line Items]
Acquisition, other intangibles recorded	$ 28,600
Medicare licenses [Member] | Hospice [Member] | AseraCare Hospice [Member]
Business Acquisition [Line Items]
Acquisition, other intangibles recorded						8,700
Medicare licenses [Member] | Home Health and Hospice [Member] | Visiting Nurse Association
Business Acquisition [Line Items]
Acquisition, other intangibles recorded			$ 700
Certificates Of Need | Hospice [Member] | AseraCare Hospice [Member]
Business Acquisition [Line Items]
Acquisition, other intangibles recorded						$ 700
Certificate of Need [Member] | NORTH CAROLINA | Home Health [Member]
Business Acquisition [Line Items]
Acquisition, other intangibles recorded				$ 100
Certificate of Need [Member] | NEW YORK | Home Health [Member]
Business Acquisition [Line Items]
Acquisition, other intangibles recorded		$ 100
Technology-Based Intangible Assets | High Acuity Care | Contessa Health
Business Acquisition [Line Items]
Weighted-average amortization period	7 years
Acquisition, other intangibles recorded	$ 19,900