Significant Payors (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Concentration Risk [Line Items]
Net service revenues	$ 1,058,651	$ 951,120	$ 864,499
Operating income	90,956	$ 68,737	$ 65,936
New York [Member] \| CDPAP
Concentration Risk [Line Items]
Net service revenues	$ 40,700
Revenues [Member] \| Geographic Concentration Risk [Member] \| Illinois [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	44.50%	43.80%	38.20%
Revenues [Member] \| Illinois Department On Aging [Member] \| Illinois [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	20.90%	20.70%	21.40%
Accounts Receivable [Member] \| Illinois Department On Aging [Member] \| Illinois [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	25.80%	18.00%

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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