Discontinued Operations (Schedule Of Estimated Timing Of Payments Of Liabilities) (Details) $ in Thousands	Dec. 31, 2020 USD ($)
Discontinued Operations [Abstract]
2021	$ 826
2022	300
Thereafter	601
Estimated payments of liabilities related to discontinued operations	$ 1,727

Total estimated timing of payments of liabilities related to discontinued operations.

No definition available.

Name:	che_TotalEstimatedTimingOfPaymentsOfLiabilitiesRelatedToDiscontinuedOperations
Namespace Prefix:	che_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant