XML 100 R64.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Fair Value Measurements - Narrative (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Non-marketable long-term investments, carrying value | $ 9,000 | $ 8,200
Total investments carried at cost | 8,487 | 7,629
CoBank |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total investments carried at cost | $ 7,705 | $ 6,818

X
- Definition Cost And Equity Method Investments, Total + References No definition available. + Details
Name: | shen_CostAndEquityMethodInvestmentsTotal
Namespace Prefix: | shen_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Cost of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). Excludes equity method investment and investment in equity security without readily determinable fair value. + References No definition available. + Details
Name: | us-gaap_EquitySecuritiesFvNiCost
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | invest_InvestmentAxis=shen_CobankMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |