Acquisitions (Narrative) (Details)					3 Months Ended		9 Months Ended
	Jul. 01, 2020 USD ($)	Oct. 01, 2019 USD ($) location $ / shares shares	Aug. 01, 2019 USD ($)	Jun. 01, 2019 USD ($)	Sep. 30, 2020 USD ($) $ / shares	Sep. 30, 2019 USD ($) shares	Sep. 30, 2020 USD ($) $ / shares	Sep. 30, 2019 USD ($) shares	Dec. 31, 2019 $ / shares
Business Acquisition [Line Items]
Total purchase price for business acquisition							$ 11,869,000	$ 53,224,000
Net service revenues					$ 193,987,000	$ 168,993,000	568,779,000	456,415,000
Operating income (loss) from continuing operations					$ 11,930,000	$ 7,255,000	$ 31,058,000	$ 19,154,000
Common stock, par value | $ / shares					$ 0.001		$ 0.001		$ 0.001
Common Stock [Member]
Business Acquisition [Line Items]
Shares issued during period | shares						2,300,000		2,300,000
Maximum [Member]
Business Acquisition [Line Items]
Intangible assets, estimated useful lives							25 years
Minimum [Member]
Business Acquisition [Line Items]
Intangible assets, estimated useful lives							3 years
Trade Names [Member]
Business Acquisition [Line Items]
Identifiable intangible assets acquired								$ 1,400
Customer Relationships [Member] | Maximum [Member]
Business Acquisition [Line Items]
Intangible assets, estimated useful lives							10 years
Customer Relationships [Member] | Minimum [Member]
Business Acquisition [Line Items]
Intangible assets, estimated useful lives							5 years
A Plus Health Care, Inc [Member]
Business Acquisition [Line Items]
Total purchase price for business acquisition	$ 12,200,000
Excess cash held by acquired business	$ 2,800,000
Acquisition related costs					$ 300,000		$ 300,000
Net service revenues					2,600,000		2,600,000
Operating income (loss) from continuing operations					500,000		500,000
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
Hospice Partners [Member]
Business Acquisition [Line Items]
Total purchase price for business acquisition		$ 135,600,000
Net service revenues					13,000,000.0		40,300,000
Operating income (loss) from continuing operations					3,500,000		9,500,000
Number of locations | location		21
Integration costs							1,500,000
Hospice Partners [Member] | Common Stock [Member]
Business Acquisition [Line Items]
Shares issued during period | shares		2,300,000
Common stock, par value | $ / shares		$ 0.001
Public offering price, per share | $ / shares		$ 79.50
Hospice Partners [Member] | Common Stock [Member] | Over Allotment Option [Member]
Business Acquisition [Line Items]
Shares issued during period | shares		300,000
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] | Noncompete Agreements
Business Acquisition [Line Items]
Identifiable intangible assets acquired		$ 2,500,000
Hospice Partners [Member] | Noncompete Agreements | Maximum [Member]
Business Acquisition [Line Items]
Intangible assets, estimated useful lives		5 years
Hospice Partners [Member] | Noncompete Agreements | Minimum [Member]
Business Acquisition [Line Items]
Intangible assets, estimated useful lives		3 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
Integration costs						$ 300,000	200,000	300,000
Alliance Home Health Care [Member] | New York [Member]
Business Acquisition [Line Items]
Net service revenues					3,300,000	3,400,000	12,000,000.0	3,400,000
Operating income (loss) from continuing operations					700,000	800,000	2,700,000	800,000
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
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	200,000	300,000
VIP Health Care Services [Member] | New York [Member]
Business Acquisition [Line Items]
Net service revenues					9,700,000	13,200,000	30,500,000	17,600,000
Operating income (loss) from continuing operations					$ (400,000)	$ (400,000)	$ (1,100,000)	$ (100,000)
VIP Health Care Services [Member] | State Licenses [Member]
Business Acquisition [Line Items]
Intangible assets, estimated useful lives				6 years
Identifiable intangible assets acquired				$ 10,700,000
VIP Health Care Services [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Intangible assets, estimated useful lives				8 years
Identifiable intangible assets acquired				$ 4,700,000