Significant Payors (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Concentration Risk [Line Items]
Net service revenues	$ 951,120	$ 864,499	$ 764,775
Operating income	68,737	$ 65,936	$ 44,507
New York [Member] | CDPAP
Concentration Risk [Line Items]
Net service revenues	$ 39,200
Revenues [Member] | Geographic Concentration Risk [Member] | Illinois [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	43.80%	38.20%	37.70%
Revenues [Member] | Illinois Department On Aging [Member] | Illinois [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	20.70%	21.40%	23.00%
Accounts Receivable [Member] | Illinois Department On Aging [Member] | Illinois [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	18.00%	16.10%