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Long-Term Debt - Schedule of Financial Covenants (Details) | 9 Months Ended
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Sep. 30, 2019 USD ($)
Debt Disclosure [Abstract] |
Leverage ratio, actual | 2.38
Covenant requirement, total leverage ratio | 3.50
Debt service coverage ratio, actual | 6.21
Minimum debt service coverage ratio | 2.00
Covenant, liquidity balance, actual | $ 172,200,000
Debt instrument covenants minimum liquidity amount | $ 25,000,000.0

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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
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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

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
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