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v3.20.2

Long-Term Debt - Financial Covenants in Credit Agreements (Details) | 3 Months Ended
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Jun. 30, 2020 USD ($)
Actual |
Total leverage ratio | 2.3
Debt service coverage ratio | 5.7
Minimum liquidity balance (in millions) | $ 218,500,000
Covenant Requirement |
Total Leverage Ratio | 3.25
Debt Service Coverage Ratio | 2.00
Minimum liquidity balance | $ 25,000,000.0

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- Definition Actual Covenant [Abstract] + References No definition available. + Details
Name: | shen_ActualCovenantAbstract
Namespace Prefix: | shen_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Covenant Requirement [Abstract] + References No definition available. + Details
Name: | shen_CovenantRequirementAbstract
Namespace Prefix: | shen_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Debt Instrument, Covenant, Liquidity Balance, Actual + References No definition available. + Details
Name: | shen_DebtInstrumentCovenantLiquidityBalanceActual
Namespace Prefix: | shen_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Represents the minimum liquidity balance, defined as availability under the revolver facility plus unrestricted cash and cash equivalents on deposit in a deposit account for which a control agreement has been delivered to the administrative agent. + References No definition available. + Details
Name: | shen_DebtInstrumentCovenantsMinimumLiquidityAmount
Namespace Prefix: | shen_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Represents actual debt service coverage ratio. + References No definition available. + Details
Name: | shen_DebtServiceCoverageRatioActual
Namespace Prefix: | shen_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

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- Definition Represents actual leverage ratio. + References No definition available. + Details
Name: | shen_LeverageRatioActual
Namespace Prefix: | shen_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

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- Definition Ratio of EBITDA divided by sum of all scheduled principal payments on Term Loans and regularly scheduled principal payments on other indebtedness plus cash interest. + References No definition available. + Details
Name: | shen_MinimumDebtServiceCoverageRatio
Namespace Prefix: | shen_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

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- Definition Ratio of indebtedness to earnings before interest, taxes, depreciation and amortization. + References No definition available. + Details
Name: | shen_RatioOfIndebtednessToEbitda
Namespace Prefix: | shen_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration