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Revenue from Contracts with Customers Revenue from Contract with Customers - Contract Asset Activity (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2020 | Mar. 31, 2019
Contract Asset Balance [Roll Forward] |  |
Beginning Balance | $ 84,663 | $ 65,674
Contract payments | 18,245 | 18,151
Contract amortization | (16,710) | (13,454)
Ending Balance | $ 86,198 | $ 70,371

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- Definition Contract Asset Balance [Roll Forward] + References No definition available. + Details
Name: | shen_ContractAssetBalanceRollForward
Namespace Prefix: | shen_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Contract with Customer, Assets, Payments + References No definition available. + Details
Name: | shen_ContractwithCustomerAssetsPayments
Namespace Prefix: | shen_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Contract with Customer, Reduction in Revenue, Amortization + References No definition available. + Details
Name: | shen_ContractwithCustomerReductioninRevenueAmortization
Namespace Prefix: | shen_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130549-203045 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=118944033&loc=SL49130531-203044 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=118944033&loc=SL49130533-203044 + Details
Name: | us-gaap_ContractWithCustomerAssetNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant