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Leases (Narrative) (Details)	12 Months Ended
	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

X

- 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

X

- 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

X

- References

No definition available.

+ Details

Name:	us-gaap_LeasesAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- 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