ACQUISITIONS - Narrative (Details) $ in Thousands								3 Months Ended								12 Months Ended
	Oct. 01, 2020 USD ($)	Jun. 01, 2020 USD ($) care_center	Apr. 18, 2020 USD ($)	Mar. 01, 2020 USD ($)	Jan. 01, 2020 USD ($) care_center	Apr. 01, 2019 USD ($)	Feb. 01, 2019 USD ($)	Dec. 31, 2020 USD ($)	Sep. 30, 2020 USD ($)	Jun. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Schedule of Business Acquisitions, Purchase Price Allocation [Line Items]
Goodwill recorded during period																$ 274,200	$ 329,000
Net service revenue								$ 550,700	$ 544,100	$ 485,000	$ 491,700	$ 500,700	$ 494,600	$ 493,000	$ 467,300	2,071,519	1,955,633	$ 1,662,578
Operating income (loss)																219,268	177,472	155,148
Depreciation and amortization																$ 28,802	18,428	$ 13,261
Noncompete Agreements [Member]
Schedule of Business Acquisitions, Purchase Price Allocation [Line Items]
Weighted-average amortization period																1 year 2 months 12 days
Home Health [Member]
Schedule of Business Acquisitions, Purchase Price Allocation [Line Items]
Goodwill recorded during period																$ 3,300	0
Home Health [Member] | WASHINGTON
Schedule of Business Acquisitions, Purchase Price Allocation [Line Items]
Payments to Acquire Businesses, Gross				$ 3,000
Goodwill recorded during period																2,800
Home Health [Member] | WASHINGTON | Certificate of Need [Member]
Schedule of Business Acquisitions, Purchase Price Allocation [Line Items]
Acquisition, other intangibles recorded								200								200
Home Health [Member] | KENTUCKY
Schedule of Business Acquisitions, Purchase Price Allocation [Line Items]
Payments to Acquire Businesses, Gross			$ 700
Goodwill recorded during period																500
Home Health [Member] | KENTUCKY | Certificate of Need [Member]
Schedule of Business Acquisitions, Purchase Price Allocation [Line Items]
Acquisition, other intangibles recorded								200								200
Hospice [Member]
Schedule of Business Acquisitions, Purchase Price Allocation [Line Items]
Goodwill recorded during period																270,900	329,000
Personal Care [Member]
Schedule of Business Acquisitions, Purchase Price Allocation [Line Items]
Goodwill recorded during period																0	0
Asana Hospice [Member] | Hospice [Member]
Schedule of Business Acquisitions, Purchase Price Allocation [Line Items]
Acquisition, number of care centers acquired | care_center					8
Payments to Acquire Businesses, Gross					$ 66,300
Cash Acquired from Acquisition					$ 700
Business Acquisition Working Capital Adjustment										$ 700
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables								4,600								4,600
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment								200								200
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Operating Lease Right of Use Assets								900								900
Acquisition, other intangibles recorded								5,600								5,600
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets								11,300								11,300
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable								(3,200)								(3,200)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Payroll and Employee Benefits								(1,500)								(1,500)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accrued Expenses								(500)								(500)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Operating Lease Liabilities								(900)								(900)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities								(6,100)								(6,100)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net								5,200								5,200
Goodwill recorded during period																60,400
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net								65,600								65,600
Period of time goodwill is expected to be deductible for income tax purposes					15 years
Net service revenue																23,400
Operating income (loss)																(3,300)
Business Combination, Integration Related Costs																2,000
Depreciation and amortization																2,600
Asana Hospice [Member] | Hospice [Member] | Noncompete Agreements [Member]
Schedule of Business Acquisitions, Purchase Price Allocation [Line Items]
Acquisition, other intangibles recorded								2,300								2,300
Weighted-average amortization period					2 years
Asana Hospice [Member] | Hospice [Member] | Medicare Licenses [Member]
Schedule of Business Acquisitions, Purchase Price Allocation [Line Items]
Acquisition, other intangibles recorded								2,000								2,000
Asana Hospice [Member] | Hospice [Member] | Acquired Names [Member]
Schedule of Business Acquisitions, Purchase Price Allocation [Line Items]
Acquisition, other intangibles recorded								1,300								1,300
Weighted-average amortization period					2 years
AseraCare Hospice [Member] | Hospice [Member]
Schedule of Business Acquisitions, Purchase Price Allocation [Line Items]
Acquisition, number of care centers acquired | care_center		44
Payments to Acquire Businesses, Gross		$ 230,400
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables								15,000								15,000
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed Current Assets Prepaid Expense								700								700
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment								600								600
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Operating Lease Right of Use Assets								5,900								5,900
Acquisition, other intangibles recorded								24,300								24,300
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets								100								100
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets								46,600								46,600
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable								(5,800)								(5,800)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Payroll and Employee Benefits								(5,900)								(5,900)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accrued Expenses								(10,400)								(10,400)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Operating Lease Liabilities								(5,400)								(5,400)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities								(27,500)								(27,500)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net								19,100								19,100
Goodwill recorded during period																210,500
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net								229,600								229,600
Period of time goodwill is expected to be deductible for income tax purposes		15 years
Payments related to tax asset		$ 32,000
Business Acquisition Closing Payment Adjustment	$ 800
Net service revenue																64,500
Operating income (loss)																(8,200)
Business Combination, Integration Related Costs																7,600
Depreciation and amortization																6,000
AseraCare Hospice [Member] | Hospice [Member] | Maximum [Member]
Schedule of Business Acquisitions, Purchase Price Allocation [Line Items]
Business Acquisition Closing Payment Adjustment		$ 1,000
AseraCare Hospice [Member] | Hospice [Member] | Certificates Of Need [Member]
Schedule of Business Acquisitions, Purchase Price Allocation [Line Items]
Acquisition, other intangibles recorded								700								700
AseraCare Hospice [Member] | Hospice [Member] | Noncompete Agreements [Member]
Schedule of Business Acquisitions, Purchase Price Allocation [Line Items]
Acquisition, other intangibles recorded								9,200								9,200
Weighted-average amortization period		1 year 8 months 12 days
AseraCare Hospice [Member] | Hospice [Member] | Medicare Licenses [Member]
Schedule of Business Acquisitions, Purchase Price Allocation [Line Items]
Acquisition, other intangibles recorded								8,700								8,700
AseraCare Hospice [Member] | Hospice [Member] | Acquired Names [Member]
Schedule of Business Acquisitions, Purchase Price Allocation [Line Items]
Acquisition, other intangibles recorded								$ 5,700								$ 5,700
Weighted-average amortization period		2 years
RoseRock Healthcare [Member] | Hospice [Member]
Schedule of Business Acquisitions, Purchase Price Allocation [Line Items]
Payments to Acquire Businesses, Gross						$ 17,500
Goodwill recorded during period																	15,800
Period of time goodwill is expected to be deductible for income tax purposes						15 years
Net service revenue																	6,800
Operating income (loss)																	800
RoseRock Healthcare [Member] | Hospice [Member] | Noncompete Agreements [Member]
Schedule of Business Acquisitions, Purchase Price Allocation [Line Items]
Acquisition, other intangibles recorded												700					700
Weighted-average amortization period						3 years
RoseRock Healthcare [Member] | Hospice [Member] | Acquired Names [Member]
Schedule of Business Acquisitions, Purchase Price Allocation [Line Items]
Acquisition, other intangibles recorded												1,000					1,000
Weighted-average amortization period						3 years
Compassionate Care Hospice [Member] | Hospice [Member]
Schedule of Business Acquisitions, Purchase Price Allocation [Line Items]
Payments to Acquire Businesses, Gross							$ 327,900
Cash Acquired from Acquisition							$ 6,700
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables												24,500					24,500
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed Current Assets Prepaid Expense												800					800
Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Other Current Asset												100					100
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment												200					200
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Operating Lease Right of Use Assets												3,400					3,400
Acquisition, other intangibles recorded												27,200					27,200
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets												1,100					1,100
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets												57,300					57,300
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable												(14,900)					(14,900)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Payroll and Employee Benefits												(11,700)					(11,700)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accrued Expenses												(11,700)					(11,700)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities												(900)					(900)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Operating Lease Liabilities												(3,400)					(3,400)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities												(42,600)					(42,600)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net												14,700					14,700
Goodwill recorded during period																	313,200
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net												327,900					327,900
Goodwill deductible for income tax purposes												$ 278,800					278,800
Period of time goodwill is expected to be deductible for income tax purposes							15 years
Net service revenue																	167,400
Operating income (loss)																	(5,600)
Business Combination, Integration Related Costs																	$ 14,500
Compassionate Care Hospice [Member] | Hospice [Member] | Noncompete Agreements [Member]
Schedule of Business Acquisitions, Purchase Price Allocation [Line Items]
Weighted-average amortization period							2 years 3 months 18 days
Compassionate Care Hospice [Member] | Hospice [Member] | Acquired Names [Member]
Schedule of Business Acquisitions, Purchase Price Allocation [Line Items]
Weighted-average amortization period							2 years