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Commitments and Contingencies Narrative (Details)	Jun. 30, 2020 USD ($)
FCC Spectrum Licenses
Other Commitments [Line Items]
Other commitment, annual payments	$ 108,000.0

X

- Definition

Other Commitment, Annual Payments

+ References

No definition available.

+ Details

Name:	shen_OtherCommitmentAnnualPayments
Namespace Prefix:	shen_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- 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_OtherCommitmentsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_OtherCommitmentsAxis=shen_FCCSpectrumLicensesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: