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v3.19.2

Subsequent Events - Narrative (Details) - USD ($) $ in Millions |  | 6 Months Ended
--- | --- | ---
Jul. 09, 2019 | Jun. 30, 2019
Subsequent Event [Line Items] |  |
Amount paid to acquire indefinite-lived FCC spectrum licenses |  | $ 17.0
Amount paid at close to acquire indefinite-lived FCC spectrum licenses |  | $ 4.0
Remaining lease term (in years) |  | 20 years
Subsequent Event |  |
Subsequent Event [Line Items] |  |
Amount remitted to seller for purchase of indefinite-lived licenses | $ 13.8 |

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- Definition Asset Acquisition, Amount Remitted To Seller + References No definition available. + Details
Name: | shen_AssetAcquisitionAmountRemittedToSeller
Namespace Prefix: | shen_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Asset Acquisition, Intangible Assets, Consideration Transferred + References No definition available. + Details
Name: | shen_AssetAcquisitionIntangibleAssetsConsiderationTransferred
Namespace Prefix: | shen_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Asset Acquisition, Intangible Assets, Remaining Consideration Transferred + References No definition available. + Details
Name: | shen_AssetAcquisitionIntangibleAssetsRemainingConsiderationTransferred
Namespace Prefix: | shen_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Asset Acquisition, Remaining Lease Term + References No definition available. + Details
Name: | shen_AssetAcquisitionRemainingLeaseTerm
Namespace Prefix: | shen_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |