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Cash Overdrafts, Cash Equivalents, and Supplemental Cash Flow Disclosure (Narrative) (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
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Cash Overdrafts, Cash Equivalents, and Supplemental Cash Flow Disclosure [Abstract] |  |  |
Capitalized property and equipment were not paid for | $ 1.9 | $ 1.9 | $ 3.9
Cash overdrafts included in accounts payable |  | $ 11.9 |

X
- Definition Capitalized Property And Equipment Not Paid + References No definition available. + Details
Name: | che_CapitalizedPropertyAndEquipmentNotPaid
Namespace Prefix: | che_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Cash overdraft payable included in accounts payable. + References No definition available. + Details
Name: | che_CashOverdraftPayableIncludedInAccountsPayable
Namespace Prefix: | che_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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