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Leases (Narrative) (Details) | 12 Months Ended
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Dec. 31, 2023 USD ($)
Leases [Abstract] |
Operating lease payments related to extended lease terms | $ 3,800,000
Lease payments for leases signed but not yet commenced | $ 740,000

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- Definition Lessee, Operating Lease, Lease Signed But Not Yet Commenced, Payments + References No definition available. + Details
Name: | che_LesseeOperatingLeaseLeaseSignedButNotYetCommencedPayments
Namespace Prefix: | che_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Operating Lease Payments Include To Extended Lease Terms + References No definition available. + Details
Name: | che_OperatingLeasePaymentsIncludeToExtendedLeaseTerms
Namespace Prefix: | che_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_LeasesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration