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Significant Payors (Narrative) (Details) - Illinois [Member]	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Revenues [Member] | Illinois Department On Aging [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	21.30%	22.90%	21.40%	23.10%
Revenues [Member] | Geographic Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	37.80%	38.50%	37.50%	37.80%
Accounts Receivable [Member] | Illinois Department On Aging [Member]
Concentration Risk [Line Items]
Concentration risk, percentage			14.40%		15.90%

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