Revenue Recognition (Schedule Of Patient Care Service Revenue) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Care service revenue	$ 1,289,433	$ 1,368,489	$ 1,319,851
Net revenue	1,261,246	1,334,667	1,281,184
Routine Home Care [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Care service revenue	1,069,766	1,106,358	1,076,025
Continuous Care [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Care service revenue	94,338	136,011	133,473
Inpatient Care [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Care service revenue	113,187	114,956	99,920
Care Services Total [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Care service revenue	1,277,291	1,357,325	1,309,418
All Other Revenue- Self-pay, Respite Care, Etc. [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Care service revenue	12,142	11,164	10,433
Medicare Cap Adjustment [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Medicare cap adjustment	(6,597)	(6,678)	(12,415)
Implicit Price Concessions [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Implicit price concessions	(11,530)	(14,970)	(14,893)
Room And Board, Net [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Room and board, net	(10,060)	(12,174)	(11,359)
Medicare [Member] | Routine Home Care [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Care service revenue	997,846	1,033,487	1,003,308
Medicare [Member] | Continuous Care [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Care service revenue	85,626	123,696	121,019
Medicare [Member] | Inpatient Care [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Care service revenue	98,243	100,259	84,752
Medicare [Member] | Care Services Total [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Care service revenue	1,181,715	1,257,442	1,209,079
Medicaid [Member] | Routine Home Care [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Care service revenue	46,785	48,813	48,420
Medicaid [Member] | Continuous Care [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Care service revenue	4,689	6,344	6,712
Medicaid [Member] | Inpatient Care [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Care service revenue	9,486	9,646	9,102
Medicaid [Member] | Care Services Total [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Care service revenue	60,960	64,803	64,234
Commercial [Member] | Routine Home Care [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Care service revenue	25,135	24,058	24,297
Commercial [Member] | Continuous Care [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Care service revenue	4,023	5,971	5,742
Commercial [Member] | Inpatient Care [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Care service revenue	5,458	5,051	6,066
Commercial [Member] | Care Services Total [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Care service revenue	$ 34,616	$ 35,080	$ 36,105