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Cash Overdrafts And Cash Equivalents (Narrative) (Details) - USD ($) $ in Millions | Jun. 30, 2019 | Dec. 31, 2018
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Cash Overdrafts And Cash Equivalents [Abstract] |  |
Cash overdrafts included in accounts payable | $ 15.5 | $ 13.8

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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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Namespace Prefix: | us-gaap_
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Balance Type: | na
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