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Leases (Narrative) (Details) | 12 Months Ended
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Dec. 31, 2022 USD ($)
Leases [Abstract] |
Option to terminate the lease, term | options to terminate the lease within 1 year
Operating lease payments related to extended lease terms | $ 2,700,000
Lease payments for leases signed but not yet commenced | $ 928,000

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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

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- Definition Description of terms and conditions of option to terminate lessee's operating lease. Includes, but is not limited to, information about option recognized as part of right-of-use asset and lease liability. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918673-209980 + Details
Name: | us-gaap_LesseeOperatingLeaseOptionToTerminate
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration