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Cash Overdrafts And Cash Equivalents (Narrative) (Details) - USD ($) $ in Millions | Mar. 31, 2022 | Dec. 31, 2021
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Cash Overdrafts and Cash Equivalents [Abstract] |  |
Cash overdrafts included in accounts payable | $ 4.8 | $ 11.9

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

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