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Basis Of Presentation (Narrative) (Details) $ in Thousands		3 Months Ended		6 Months Ended		12 Months Ended	14 Months Ended
Basis Of Presentation (Narrative) (Details) $ in Thousands	Mar. 27, 2020 USD ($)	Jun. 30, 2021 USD ($) item	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($) item	Jun. 30, 2020 USD ($)	Dec. 31, 2019 USD ($)	Jun. 30, 2021 USD ($) item	Dec. 31, 2020 USD ($)	Apr. 10, 2020 USD ($)
Deferred payroll taxes					$ 10,716
Revenue		$ 532,256	$ 502,199	$ 1,059,616	$ 1,017,997
Number of cloud computing arrangements \| item		2		2			2
Effective tax rate		24.70%	17.60%	23.20%	18.10%
Excess tax benefit on stock options reduced income tax expense		$ 868	$ 8,200	$ 4,100	$ 12,800
Capitalized property and equipment		1,600		1,600			$ 1,600	$ 3,900
CARES Act [Member]
Deferred payroll taxes	$ 36,400
Deferred payroll taxes, short-term liability	18,200
Deferred payroll taxes, long-term liability	18,200
Relief Fund	100,000,000
CARES Act - 2019 Medicare Fee-For-Service [Member]
Relief Fund	$ 30,000,000
Cloud Computing [Member]
Capitalized contract cost		9,100		$ 9,100			$ 9,100
VITAS [Member]
Number of COVID positive patients cared \| item				3,200
Percentage of Medicare sequestration reimbursement							2.00%
Revenue		5,900		$ 11,900
VITAS [Member] \| CARES Act - 2019 Medicare Fee-For-Service [Member]
Relief Fund									$ 80,200
VITAS [Member] \| Cloud Computing [Member]
Capitalized contract cost, amortization expense		$ 249	$ 263	$ 448	$ 525
Capitalized contract cost, amortization period		5 years		5 years			5 years
Roto-Rooter [Member]
Total purchase price						$ 138,000
Roto-Rooter [Member] \| Cloud Computing [Member]
Capitalized contract cost, amortization expense		$ 349		$ 349
Reacquired Franchise Rights [Member] \| Roto-Rooter [Member]
Total purchase price				59,200
Amortization of business combinations				2,000
Franchise fees				$ 470
Average remaining life				7 years
Reacquired Franchise Rights [Member] \| Roto-Rooter [Member] \| Annualized Through 2026 [Member]
Amortization of business combinations				$ 8,100
Reacquired Franchise Rights [Member] \| Roto-Rooter [Member] \| Annualized [Member]
Franchise fees				$ 1,900