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Cash Overdrafts And Cash Equivalents (Narrative) (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
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Cash Overdrafts, Cash Equivalents, and Supplemental Cash Flow Disclosure [Abstract] |  |  |
Capitalized property and equipment were not paid for | $ 1,900 | $ 3,900 | $ 1,800
Cash overdrafts included in accounts payable | $ 11,900 |  |
Amount invested |  | $ 100 | $ 100

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- Definition Capitalized Property And Equipment Not Paid + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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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
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- Definition Amount of short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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