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Acquisitions (Narrative) (Details)													1 Months Ended	3 Months Ended								12 Months Ended
	Dec. 04, 2020 USD ($)	Nov. 01, 2020 USD ($)	Jul. 01, 2020 USD ($)	Oct. 01, 2019 USD ($) location $ / shares shares	Sep. 09, 2019 $ / shares shares	Aug. 01, 2019 USD ($)	Jun. 01, 2019 USD ($)	Aug. 22, 2018 shares	Aug. 20, 2018 $ / shares shares	May 01, 2018 USD ($)	Apr. 01, 2018 USD ($)	Jan. 01, 2018 USD ($)	Sep. 30, 2018 USD ($)	Dec. 31, 2020 USD ($) $ / shares	Sep. 30, 2020 USD ($)	Jun. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($) $ / shares	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2020 USD ($) $ / shares	Dec. 31, 2019 USD ($) $ / shares shares	Dec. 31, 2018 USD ($) shares
Business Acquisition [Line Items]
Total purchase price for business acquisition																						$ 207,660,000	$ 184,076,000	$ 62,440,000
Net service revenues														$ 195,996,000	$ 193,987,000	$ 184,576,000	$ 190,216,000	$ 192,376,000	$ 168,993,000	$ 148,915,000	$ 138,507,000	764,775,000	648,791,000	516,647,000
Operating income (loss) from continuing operations																						41,942,000	33,170,000	20,403,000
Goodwill														$ 469,072,000				$ 275,368,000				$ 469,072,000	$ 275,368,000	$ 135,442,000
Common stock, par value | $ / shares														$ 0.001				$ 0.001				$ 0.001	$ 0.001
Minimum [Member]
Business Acquisition [Line Items]
Intangible assets, estimated useful lives																						1 year
Maximum [Member]
Business Acquisition [Line Items]
Intangible assets, estimated useful lives																						25 years
Common Stock [Member]
Business Acquisition [Line Items]
Shares issued during period | shares					2,300,000				2,100,000														2,300,000	1,390,000
Common stock, par value | $ / shares					$ 0.001				$ 0.001
Public offering price, per share | $ / shares									$ 59.00
Over Allotment Option [Member] | Common Stock [Member]
Business Acquisition [Line Items]
Shares issued during period | shares					300,000			315,000
State Licenses [Member]
Business Acquisition [Line Items]
Identifiable intangible assets acquired							$ 10,700,000
Customer Relationships [Member]
Business Acquisition [Line Items]
Identifiable intangible assets acquired							4,700,000
Queen City Hospice [Member]
Business Acquisition [Line Items]
Goodwill	$ 169,207,000
Queen City Hospice [Member] | Trade Names [Member]
Business Acquisition [Line Items]
Intangible assets, estimated useful lives																						15 years
Identifiable intangible assets acquired	$ 11,000,000.0																					$ 11,000,000.0
Queen City Hospice [Member] | Non-competition Agreements [Member]
Business Acquisition [Line Items]
Intangible assets, estimated useful lives	5 years
Identifiable intangible assets acquired	$ 1,500,000																					1,500,000
Queen City Hospice [Member] | State Licenses [Member]
Business Acquisition [Line Items]
Identifiable intangible assets acquired																						7,500,000
Indefinite lived intangible assets acquired	7,500,000
Queen City Hospice [Member] | Ohio [Member]
Business Acquisition [Line Items]
Total purchase price for business acquisition	194,800,000
Acquisition related costs																						1,800,000
Integration costs																						100,000
Excess cash held by acquired business	$ 15,400,000
Net service revenues																						4,900,000
Operating income (loss) from continuing operations																						$ 600,000
County Homemakers [Member]
Business Acquisition [Line Items]
Goodwill		$ 13,363,000
County Homemakers [Member] | Trade Names [Member]
Business Acquisition [Line Items]
Intangible assets, estimated useful lives																						1 year
Identifiable intangible assets acquired		$ 100,000																				$ 100,000
County Homemakers [Member] | State Licenses [Member]
Business Acquisition [Line Items]
Intangible assets, estimated useful lives		8 years
Identifiable intangible assets acquired		$ 300,000																				300,000
County Homemakers [Member] | Pennsylvania [Member]
Business Acquisition [Line Items]
Total purchase price for business acquisition		15,800,000
Acquisition related costs																						300,000
Integration costs																						200,000
Excess cash held by acquired business		$ 1,100,000
Net service revenues																						2,300,000
Operating income (loss) from continuing operations																						$ 200,000
A Plus Health Care, Inc [Member]
Business Acquisition [Line Items]
Goodwill			$ 9,698,000
A Plus Health Care, Inc [Member] | Trade Names [Member]
Business Acquisition [Line Items]
Intangible assets, estimated useful lives																						15 years
Identifiable intangible assets acquired			1,400,000																			$ 1,400,000
A Plus Health Care, Inc [Member] | Montana [Member]
Business Acquisition [Line Items]
Total purchase price for business acquisition			14,500,000
Acquisition related costs																						400,000
Integration costs																						300,000
Excess cash held by acquired business			$ 2,800,000
Net service revenues																						4,900,000
Operating income (loss) from continuing operations																						1,000,000.0
SunLife Hospice [Member]
Business Acquisition [Line Items]
Total purchase price for business acquisition																						1,700,000
Goodwill														$ 1,600,000								1,600,000
Hospice Partners [Member]
Business Acquisition [Line Items]
Total purchase price for business acquisition				$ 135,600,000
Acquisition related costs																							$ 1,600,000
Integration costs																							600,000
Excess cash held by acquired business				5,500,000
Net service revenues																							14,800,000
Operating income (loss) from continuing operations																							2,300,000
Goodwill				$ 111,806,000
Number of locations | location				21
Hospice Partners [Member] | Common Stock [Member]
Business Acquisition [Line Items]
Shares issued during period | shares				2,300,000,000
Common stock, par value | $ / shares				$ 0.001
Public offering price, per share | $ / shares				$ 79.50
Hospice Partners [Member] | Over Allotment Option [Member]
Business Acquisition [Line Items]
Integration costs																						$ 1,600,000
Hospice Partners [Member] | Over Allotment Option [Member] | Common Stock [Member]
Business Acquisition [Line Items]
Shares issued during period | shares				300,000,000
Hospice Partners [Member] | Trade Names [Member]
Business Acquisition [Line Items]
Intangible assets, estimated useful lives																						15 years
Identifiable intangible assets acquired				$ 9,500,000
Hospice Partners [Member] | Non-competition Agreements [Member]
Business Acquisition [Line Items]
Identifiable intangible assets acquired				$ 2,500,000
Hospice Partners [Member] | Non-competition Agreements [Member] | Minimum [Member]
Business Acquisition [Line Items]
Intangible assets, estimated useful lives				3 years
Hospice Partners [Member] | Non-competition Agreements [Member] | Maximum [Member]
Business Acquisition [Line Items]
Intangible assets, estimated useful lives				5 years
Hospice Partners [Member] | State Licenses [Member]
Business Acquisition [Line Items]
Indefinite lived intangible assets acquired				$ 6,100,000
Alliance Home Health Care [Member]
Business Acquisition [Line Items]
Total purchase price for business acquisition						$ 23,500,000
Acquisition related costs																							400,000
Integration costs																						$ 200,000	400,000
Goodwill						17,062,000
Alliance Home Health Care [Member] | State Licenses [Member]
Business Acquisition [Line Items]
Intangible assets, estimated useful lives																						10 years
Identifiable intangible assets acquired						1,100,000
Indefinite lived intangible assets acquired						$ 4,300,000
Alliance Home Health Care [Member] | New York [Member]
Business Acquisition [Line Items]
Net service revenues																							8,800,000
Operating income (loss) from continuing operations																							2,100,000
VIP Health Care Services [Member]
Business Acquisition [Line Items]
Total purchase price for business acquisition							29,900,000
Acquisition related costs																							300,000
Integration costs																						$ 200,000	500,000
Goodwill							$ 11,936,000
VIP Health Care Services [Member] | State Licenses [Member]
Business Acquisition [Line Items]
Intangible assets, estimated useful lives																						6 years
VIP Health Care Services [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Intangible assets, estimated useful lives																						8 years
VIP Health Care Services [Member] | New York [Member]
Business Acquisition [Line Items]
Net service revenues																							30,000,000.0
Operating income (loss) from continuing operations																							(200,000)
Ambercare Corporation [Member]
Business Acquisition [Line Items]
Goodwill										$ 28,831,000
Ambercare Corporation [Member] | Trade Name and Customer Relationships [Member] | Minimum [Member]
Business Acquisition [Line Items]
Intangible assets, estimated useful lives																						3 years
Ambercare Corporation [Member] | Trade Name and Customer Relationships [Member] | Maximum [Member]
Business Acquisition [Line Items]
Intangible assets, estimated useful lives																						15 years
Ambercare Corporation [Member] | New Mexico [Member]
Business Acquisition [Line Items]
Acquisition related costs																								$ 800,000
Integration costs																							200,000	1,600,000
Excess cash held by acquired business										12,000,000.0
Net service revenues																								36,700,000
Operating income (loss) from continuing operations																								7,100,000
Total purchase price for business acquisition										$ 39,600,000
Arcadia Home Care And Staffing [Member]
Business Acquisition [Line Items]
Acquisition related costs																								800,000
Integration costs																							$ 200,000	1,100,000
Net service revenues																								32,700,000
Operating income (loss) from continuing operations																								4,700,000
Goodwill											$ 13,072,000
Total purchase price for business acquisition											$ 18,900,000
Arcadia Home Care And Staffing [Member] | Trade Names, Customer Relationships and State Licenses [Member] | Minimum [Member]
Business Acquisition [Line Items]
Intangible assets, estimated useful lives																						7 years
Arcadia Home Care And Staffing [Member] | Trade Names, Customer Relationships and State Licenses [Member] | Maximum [Member]
Business Acquisition [Line Items]
Intangible assets, estimated useful lives																						15 years
Affiliate Branches of Arcadia [Member]
Business Acquisition [Line Items]
Goodwill													$ 600,000
Acquisitions of business cash consideration													$ 600,000
Lifestyle Options, Inc. [Member]
Business Acquisition [Line Items]
Goodwill												$ 2,751,000
Lifestyle Options, Inc. [Member] | Trade Name and Customer Relationships [Member] | Minimum [Member]
Business Acquisition [Line Items]
Intangible assets, estimated useful lives																						10 years
Lifestyle Options, Inc. [Member] | Trade Name and Customer Relationships [Member] | Maximum [Member]
Business Acquisition [Line Items]
Intangible assets, estimated useful lives																						15 years
Lifestyle Options, Inc. [Member] | Illinois [Member]
Business Acquisition [Line Items]
Net service revenues																								5,800,000
Operating income (loss) from continuing operations																								500,000
Total purchase price for business acquisition												4,100,000
Acquisitions of business cash consideration												3,300,000
Business acquisition, contingent earn-out obligation												$ 800,000
Contingent consideration, remeasured																								$ 0

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