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v3.20.2

Long-Term Debt And Lines of Credit (Financial Debt Covenants) (Details) | 9 Months Ended
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Sep. 30, 2020
Minimum [Member] |
Debt Instrument [Line Items] |
Leverage Ratio (Consolidated Indebtedness/Consolidated Adj. EBITDA), Requirement | 1.00
Fixed Charge Coverage Ratio (Consolidated Free Cash Flow/Consolidated Fixed Charges), Requirement | 1.00
Maximum [Member] |
Debt Instrument [Line Items] |
Leverage Ratio (Consolidated Indebtedness/Consolidated Adj. EBITDA), Requirement | 3.50
Fixed Charge Coverage Ratio (Consolidated Free Cash Flow/Consolidated Fixed Charges), Requirement | 1.50

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- Definition Fixed charge coverage ratio (consolidated free cash flow/consolidated fixed charges) + References No definition available. + Details
Name: | che_FixedChargeCoverageRatioConsolidatedFreeCashFlowConsolidatedFixedCharges
Namespace Prefix: | che_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

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- Definition Leverage ratio (consolidated indebtedness/consolidated adjustment EBITDA). + References No definition available. + Details
Name: | che_LeverageRatioConsolidatedIndebtednessConsolidatedAdjustmentEbitda
Namespace Prefix: | che_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |