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Leases (Narrative) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2024 USD ($)
Leases [Abstract]
Operating lease payments related to extended lease terms	$ 3.1
Lease payments for leases signed but not yet commenced	$ 1.1

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