Gains (Losses) on Cash Flow Hedges AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member] Percentage of patronage credit paid in cash Percentage of Patronage Credit Paid in Cash Represents the percentage of patronage credits paid in cash by the entity. Residential & SMB Residential And SMB [Member] Residential And SMB 2024 Lessee, Lease Liability, Payments, Due Year Three Lessee, Lease Liability, Payments, Due Year Three Net income Net income Net Income (Loss) Attributable to Parent Entity Emerging Growth Company Entity Emerging Growth Company Effective Income Tax Rate Reconciliation, Amount [Abstract] Effective Income Tax Rate Reconciliation, Amount [Abstract] Operating lease right-of-use assets Operating Lease, Right-of-Use Asset Term loan A-2 Term loan A-2 [Member] Loan from a bank/financial institution for a specific amount that has a specified repayment schedule and a fixed/floating interest rate. Income Statement Location [Axis] Income Statement Location [Axis] Accumulated amortization and other Finite-Lived Intangible Assets, Accumulated Amortization Statistical Measurement [Domain] Statistical Measurement [Domain] Entity Address, Address Line One Entity Address, Address Line One Other intangibles Other Intangible Assets [Member] Dividends declared Dividends, Common Stock, Cash SERP Investments at fair value Equity Securities, FV-NI, Current Sale proceeds Disposal Group, Including Discontinued Operation, Consideration Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] Entity Filer Category Entity Filer Category Operating lease, weighted average remaining lease term Operating Lease, Weighted Average Remaining Lease Term Prepaid expenses and other Other Assets, Noncurrent Net current period other comprehensive (loss) income Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent Investment, Name [Axis] Investment, Name [Axis] Segments [Axis] Segments [Axis] Net increase in cash and cash equivalents Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Deferred charges and other assets Deferred charges and other assets Deferred Costs, Noncurrent Total lease payments Lessee, Lease Liability, Payments, Due Lessee, Lease Liability, Payments, Due Contract payments Capitalized Contract Cost Payments Capitalized Contract Cost Payments Variable Rate Component Two Variable Rate Component Two [Member] Variable Rate Component Two Discontinued Operations Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Document Fiscal Year Focus Document Fiscal Year Focus Retirement Plan Name [Domain] Retirement Plan Name [Domain] FCC spectrum license obligations FCC Spectrum Licenses Leases Non Current FCC Spectrum Licenses Leases Non Current Subsequent Event Type [Domain] Subsequent Event Type [Domain] Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Amortization expense Amortization of Intangible Assets Operating lease, weighted average discount rate, percent Operating Lease, Weighted Average Discount Rate, Percent Cost of services and cost of goods sold Disposal Group, Including Discontinued Operation, Costs of Goods Sold Present value of lease liabilities Lease, Liability Lease, Liability Subsequent Events [Abstract] Subsequent Events [Abstract] Business Acquisition [Axis] Business Acquisition [Axis] Goodwill Disposal Group, Including Discontinued Operation, Goodwill, Current Amortization Amortization Reflected as Operating Expense The aggregate amount of recurring noncash operating expense charged against earnings in the period to allocate the cost of assets over their estimated remaining economic lives. Operating lease right-of-use assets Increase Decrease In Operating Lease Right Of Use Asset Increase Decrease In Operating Lease Right Of Use Asset Benefit plan obligations Liability, Defined Benefit Plan, Noncurrent Intangible Assets Resulting from Acquisition Schedule of Indefinite-Lived Intangible Assets [Table Text Block] Credit Facility [Domain] Credit Facility [Domain] ASSETS ASSETS Assets [Abstract] Land Land [Member] Ntelos Holding, Corp Ntelos Holding, Corp [Member] Represents the aggregation and reporting of combined amounts of individually immaterial business combinations that were completed during the period. Equipment revenue Equipment Product And Service [Member] Equipment Product And Service [Member] Discontinued operations: Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax [Abstract] Derivatives and Hedging Derivative Instruments and Hedging Activities Disclosure [Text Block] Goodwill and Intangible Assets Goodwill and Intangible Assets Disclosure [Text Block] Accrued programming costs Accrued Programming Costs, Current Accrued Programming Costs, Current Entity Address, City or Town Entity Address, City or Town Retained Earnings Retained Earnings [Member] Debt Instrument [Axis] Debt Instrument [Axis] Other Liabilities Disclosure [Abstract] Other Liabilities Disclosure [Abstract] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Finance lease, cost Finance Lease, Cost Finance Lease, Cost Balance as of December 31, 2020 Balance as of September 30, 2021 AOCI Tax, Attributable to Parent Other commitment, annual payments Other Commitment, Annual Payments Other Commitment, Annual Payments Related Party [Axis] Related Party [Axis] Variable Rate Component Three Variable Rate Component Three [Member] Variable Rate Component Three Accounts receivable Increase (Decrease) in Accounts Receivable Right-of-use asset obtained in exchange for operating lease liability Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Other Noncurrent Liabilities Other Noncurrent Liabilities [Table Text Block] Entity Interactive Data Current Entity Interactive Data Current Basic net income per share (in dollars per share) Earnings Per Share, Basic Indefinite-lived Intangible Assets, Major Class Name [Domain] Indefinite-lived Intangible Assets, Major Class Name [Domain] Other nonoperating income (expense) Equity Securities, FV-NI, Realized Gain (Loss) Net cash used in investing activities - continuing operations Net Cash Provided by (Used in) Investing Activities, Continuing Operations 2024 Lessee, Operating Lease, Liability, to be Paid, Year Three Revenue from Contracts with Customers Revenue from Contract with Customer [Text Block] Sublease income Sublease Income Document Type Document Type Income Tax (Expense) Benefit AOCI Attributable to Parent, Tax [Roll Forward] AOCI Attributable to Parent, Tax [Roll Forward] Net cash provided by investing activities - discontinued operations Cash Provided by (Used in) Investing Activities, Discontinued Operations Entity Current Reporting Status Entity Current Reporting Status Beginning Balance Ending Balance Capitalized Contract Cost, Net Operating lease, payments Operating Lease, Payments Broadband contract acquisition and fulfillment costs Capitalized Contract Cost, Net, Noncurrent 2026 and thereafter Lessor, Operating Lease, Payment To Be Received, After Year Four Lessor, Operating Lease, Payment To Be Received, After Year Four Proceeds from sale of assets and other Proceeds from Sale of Machinery and Equipment Bad debt expense Accounts Receivable, Credit Loss Expense (Reversal) Disposal Groups, Including Discontinued Operations [Table] Disposal Groups, Including Discontinued Operations [Table] 2025 Lessee, Lease Liability, Payments, Due Year Four Lessee, Lease Liability, Payments, Due Year Four Payments for derivative instruments Payments for Derivative Instrument, Financing Activities Diluted - Income from continuing operations (in dollars per share) Income (Loss) from Continuing Operations, Per Diluted Share Total other long-term liabilities Liabilities, Other than Long-term Debt, Noncurrent Document Transition Report Document Transition Report Broadband Broadband Segment [Member] Broadband Segment Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] State income taxes, net of federal tax effect Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount Operating Leases Lessee, Operating Lease, Liability, Payment, Due [Abstract] Base Rate Base Rate [Member] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Total liabilities and shareholders’ equity Liabilities and Equity Other current liabilities Other Accrued Liabilities, Current Total net leverage ratio Debt Instrument, Covenant, Total Net Leverage Ratio, Maximum Debt Instrument, Covenant, Total Net Leverage Ratio, Maximum Net gains/(losses) on interest rate swaps, net of tax Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax Diluted - Income from discontinued operations, net of tax (in dollars per share) Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share Total Lessor, Operating Lease, Payments to be Received Other (expense) income: Other Income and Expenses [Abstract] Advanced billings and customer deposits Contract with Customer, Liability, Current Excess tax benefit from share based compensation and other expense, net Effective Income Tax Rate Reconciliation, Tax Expense (Benefit), Share-based Payment Arrangement, Amount Cost of services Service [Member] Additional paid in capital Additional Paid in Capital LIABILITIES AND SHAREHOLDERS’ EQUITY Liabilities and Equity [Abstract] Accounts payable Increase (Decrease) in Accounts Payable Restructuring Reserve [Roll Forward] Restructuring Reserve [Roll Forward] Schedule of Other Current Assets Schedule of Other Current Assets [Table Text Block] Amounts reclassified from accumulated other comprehensive income (loss) to earnings as a result of swap termination Reclassification from AOCI, Current Period, Tax Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] Operating expenses Operating Expenses [Abstract] Ownership interest, percentage Equity Method Investment, Ownership Percentage Stock options exercised Stock Issued During Period, Value, Stock Options Exercised Minimum Minimum [Member] Retirement Plan Name [Axis] Retirement Plan Name [Axis] New Credit Agreement New Credit Agreement [Member] New Credit Agreement Shares retired for settlement of employee taxes upon issuance of vested equity awards Business Acquisition Equity Interest Issued or Issuable to Noncontrolling, Value Assigned Value of noncontrolling interests (such as common shares, preferred shares, or partnership interest) issued or issuable to acquire the entity. Affiliated Entity Affiliated Entity [Member] 2023 Lessee, Operating Lease, Liability, to be Paid, Year Two Minimum Rental Receipts Under Lease Agreement Lessor, Operating Leases Lessor, Operating Lease, Payment to be Received, Fiscal Year Maturity [Table Text Block] Income (loss) from continuing operations before income taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Selling, general and administrative Selling, General and Administrative Expense Indefinite-lived Intangible Assets [Axis] Indefinite-lived Intangible Assets [Axis] Capitalized Contract Cost [Roll Forward] Capitalized Contract Cost [Roll Forward] Capitalized Contract Cost [Roll Forward] Leases Lessee, Finance Leases [Text Block] Beginning balance Ending balance Restructuring Reserve Operating income Disposal Group, Including Discontinued Operation, Operating Income (Loss) Trading Symbol Trading Symbol 2022 Lessor, Operating Lease, Payment to be Received, Year One Amounts reclassified from accumulated other comprehensive income (loss) to earnings as a result of swap termination Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent Current liabilities: Liabilities, Current [Abstract] Common stock issued Stock Issued During Period, Value, New Issues Net cash used in financing activities - discontinued operations Cash Provided by (Used in) Financing Activities, Discontinued Operations Debt Debt Disclosure [Text Block] Restructuring Plan [Domain] Restructuring Plan [Domain] Proceeds from income tax refunds Proceeds from Income Tax Refunds Line of Credit Line of Credit [Member] Earnings per Share and Dividends Share-based Payment Arrangement [Text Block] Property, plant and equipment [Abstract] Property, Plant and Equipment, Net, by Type [Abstract] Dividends paid, net of dividends reinvested Payments of Ordinary Dividends, Common Stock Other Investments Schedule Of Other Investments Which Do Not Have Readily Determinable Fair Values [Table Text Block] Tabular disclosure of other investments which do not have readily determinable fair values. 2025 Lessor, Operating Lease, Payment to be Received, Year Four Present value of lease liabilities Operating Lease, Liability Income from continuing operations Income from continuing operations Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent Common stock, no par value, authorized 96,000; 49,965 and 49,868 issued and outstanding at September 30, 2021 and December 31, 2020, respectively Common Stock, Value, Issued Finance lease, weighted average discount rate, percent Finance Lease, Weighted Average Discount Rate, Percent Other income, net Other income, net Nonoperating Income (Expense) Commitments and contingencies Commitments and Contingencies Common stock issued to acquire a non-controlling interests of nTelos (in shares) Business Acquisition Noncontrolling Interest Issued Or Issuable Shares Assigned Number of shares (such as common shares, preferred shares, or partnership interest) issued or issuable to acquire the entity attributable to noncontrolling interests. Subsequent Event [Table] Subsequent Event [Table] Leases Lessee, Operating Leases [Text Block] Accumulated other comprehensive loss, net of taxes Balance as of December 31, 2020 Balance as of September 30, 2021 Accumulated Other Comprehensive Income (Loss), Net of Tax Dividends payable (in dollars per share) Dividends Payable, Amount Per Share Allowance for doubtful accounts Accounts Receivable, Allowance for Credit Loss, Current 2021 Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year Value of business percentage Related Party, Purchase Option, Value Of Business Percentage Related Party, Purchase Option, Value Of Business Percentage Payments for debt issuance costs Payments of Debt Issuance Costs Other Commitments [Table] Other Commitments [Table] FCC spectrum licenses FCC Spectrum Licenses [Member] FCC Spectrum Licenses [Member] Schedule of Other Assets, Noncurrent Schedule of Other Assets, Noncurrent [Table Text Block] Disposal Group Classification [Axis] Disposal Group Classification [Axis] Document Period End Date Document Period End Date Revenue remaining performance obligation, per year Revenue Remaining Performance Obligation, Amount Per Year Revenue Remaining Performance Obligation, Amount Per Year Total operating expenses Costs and Expenses Entity Registrant Name Entity Registrant Name Deferred charges and other assets Disposal Group, Including Discontinued Operation, Deferred Charges And Other Assets, Current Disposal Group, Including Discontinued Operation, Deferred Charges And Other Assets, Current Summary of Accrued Liabilities and Other Other Current Liabilities [Table Text Block] Less: Interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Net cash provided by operating activities - discontinued operations Cash Provided by (Used in) Operating Activities, Discontinued Operations Sales and property taxes payable Sales And Property Taxes Payable Current Sales And Property Taxes Payable Current Operating Activities [Domain] Operating Activities [Domain] CoBank CoBank [Member] Equity securities investments. Railroad crossing rights Railroad Crossing Rights [Member] Railroad Crossing Rights [Member] Balance as of December 31, 2020 Balance as of September 30, 2021 AOCI before Tax, Attributable to Parent Prepaid expenses and other Prepaid expenses and other Prepaid Expense and Other Assets, Current Accretion of asset retirement obligations Amortization Reflected As Rent Expense Amortization Reflected As Rent Expense Revenue from related parties Revenue from Related Parties Cash dividend declared per share (in dollars per share) Common Stock, Dividends, Per Share, Declared Accrued liabilities and other Accrued liabilities and other Accrued Liabilities, Current Service revenue and other Revenue from Contract with Customer, Excluding Assessed Tax Lease liabilities Increase (Decrease) in Income Taxes Payable, Net of Income Taxes Receivable Total operating expenses Disposal Group, Including Discontinued Operation, Operating Expense Less: Interest Finance Lease, Liability, Undiscounted Excess Amount Changes in assets and liabilities: Increase (Decrease) in Operating Assets [Abstract] Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Abstract] Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Abstract] Consolidation Items [Domain] Consolidation Items [Domain] Payments Payments for Restructuring Shares of Common Stock (no par value) Common Stock [Member] Variable Rate [Axis] Variable Rate [Axis] Segment Reporting Segment Reporting Disclosure [Text Block] Finance lease, weighted average remaining lease term Finance Lease, Weighted Average Remaining Lease Term Operating income (loss) Operating income (loss) Operating Income (Loss) Schedule of Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Prepaid maintenance expenses Prepaid Maintenance Expense, Current Prepaid Maintenance Expense, Current SERP investments SERP Investments, Current SERP Investments, Current Current operating lease liabilities Operating Lease, Liability, Current Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Income before income taxes Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, before Income Tax Property, Plant and Equipment [Abstract] Property, Plant and Equipment [Abstract] Stock based compensation expense, net of amount capitalized Share-based Payment Arrangement, Noncash Expense Variable Rate [Domain] Variable Rate [Domain] Accumulated Other Comprehensive Income (Loss), net of taxes AOCI Attributable to Parent, Net of Tax [Roll Forward] Inventory Disposal Group, Including Discontinued Operation, Inventory, Current Additional Paid in Capital Additional Paid-in Capital [Member] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Depreciation Depreciation Waived management fees Disposal Group, Discontinued Operation, Consideration, Waived Management Fees Disposal Group, Discontinued Operation, Consideration, Waived Management Fees Repayments of debt Repayments of Debt Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Term loan A-1 Term loan A-1 [Member] Loan from a bank/financial institution for a specific amount that has a specified repayment schedule and a fixed/floating interest rate. Tower lease Tower Lease [Member] Tower Lease [Member] Depreciation and amortization Disposal Group, Including Discontinued Operation, Depreciation and Amortization Capital expenditures Payments to Acquire Property, Plant, and Equipment Other Assets and Accrued Liabilities Other Liabilities Disclosure [Text Block] Maximum Maximum [Member] Share-based Payment Arrangement [Abstract] Share-based Payment Arrangement [Abstract] Expected Maturity of Lease Liabilities, Operating Lessee, Operating Lease, Liability, Maturity [Table Text Block] Consolidation Items [Axis] Consolidation Items [Axis] Total shareholders’ equity Beginning balance Ending balance Stockholders' Equity Attributable to Parent Gains (Losses) on Cash Flow Hedges AOCI Attributable to Parent, Before Tax [Roll Forward] AOCI Attributable to Parent, Before Tax [Roll Forward] Leases Lessor, Operating Leases [Text Block] Common stock, shares issued (in shares) Common Stock, Shares, Issued Ntelos Pension Plan Ntelos Pension Plan [Member] Ntelos Pension Plan [Member] 2026 and thereafter Lessee, Operating Lease, Liability, To Be Paid, After Year Four Lessee, Operating Lease, Liability, To Be Paid, After Year Four Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] Income tax expense Discontinued Operation, Tax Effect of Income (Loss) from Discontinued Operation During Phase-out Period Other deferrals and accruals Increase (Decrease) in Other Accrued Liabilities Estimated Useful Lives Property, Plant and Equipment, Useful Life Shareholders’ equity: Stockholders' Equity Attributable to Parent [Abstract] Schedule of Accumulated Other Comprehensive Income (Loss) Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Non-current operating lease liabilities Operating Lease, Liability, Noncurrent Total lease payments Finance Lease, Liability, Payment, Due Equipment and software Equipment and Software [Member] Purchased software applications and internally developed software for sale, licensing or long-term internal use and related equipment. Interest expense Interest Expense 2022 Finance Lease, Liability, to be Paid, Year One Discontinued Operations and Disposal Groups [Abstract] Debt extinguishment Disposal Group, Including Discontinued Operation, Extinguishment Of Debt Disposal Group, Including Discontinued Operation, Extinguishment Of Debt Contract amortization Capitalized Contract Cost, Amortization City Area Code City Area Code Retained earnings Retained Earnings (Accumulated Deficit) Operating Segments Operating Segments [Member] Asset retirement obligations Disposal Group, Including Discontinued Operation, Pension Plan Benefit Obligation, Current Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Present value of lease liabilities Finance Lease, Liability Reconciliation of income from continuing operations from segments to consolidated [Abstract] Reconciliation of income from continuing operations from segments to consolidated [Abstract] Income Statement [Abstract] Income Statement [Abstract] Amendment Flag Amendment Flag 2024 Finance Lease, Liability, to be Paid, Year Three 2025 Finance Lease, Liability, to be Paid, Year Four Non-amortizing intangibles Indefinite-lived Intangible Assets (Excluding Goodwill) Discontinued Operations, Held-for-sale Discontinued Operations, Held-for-sale [Member] 2023 Finance Lease, Liability, to be Paid, Year Two Total Lease Liabilities, Payments, Due [Abstract] Lease Liabilities, Payments, Due [Abstract] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Income tax expense (benefit) Income tax (benefit) expense Income Tax Expense (Benefit) Other Commitments [Domain] Other Commitments [Domain] Accounts receivable, net of allowance for doubtful accounts of $565 and $614, respectively Accounts Receivable, after Allowance for Credit Loss, Current Severance expense Disposal Group, Including Discontinued Operations, Severance Expense Disposal Group, Including Discontinued Operations, Severance Expense Equity Components [Axis] Equity Components [Axis] Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Total current assets Assets, Current Revaluation of deferred tax liabilities Effective Income Tax Rate Reconciliation, Revaluation Of Deferred Tax Liabilities Effective Income Tax Rate Reconciliation, Revaluation Of Deferred Tax Liabilities Total lease payments Lessee, Operating Lease, Liability, to be Paid Selected Financial Data for Segments Schedule of Segment Reporting Information, by Segment [Table Text Block] Entity File Number Entity File Number Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Equity method investments Equity Method Investment, Aggregate Cost Current maturities of long-term debt, net of unamortized loan fees Long-term Debt, Current Maturities Product and Service [Axis] Product and Service [Axis] Property, Plant and Equipment, Type [Domain] Long-Lived Tangible Asset [Domain] Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract] Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Accrued liabilities and other Disposal Group, Including Discontinued Operation, Accrued Liabilities, Current Entity Small Business Entity Small Business Restructuring Plan [Axis] Restructuring Plan [Axis] Equity Component [Domain] Equity Component [Domain] Effect from dilutive shares and options outstanding (in shares) Business Acquisition Noncontrolling Interest, Shares Reserved To Acquire Noncontrolling Interest Business Acquisition Noncontrolling Interest, Shares Reserved To Acquire Noncontrolling Interest Stock based compensation (in shares) Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture Stranded tax effects reclassified from other comprehensive income Effective Income Tax Rate Reconciliation, Reclassification From Other Comprehensive Income Effective Income Tax Rate Reconciliation, Reclassification From Other Comprehensive Income 2022 Lessee, Operating Lease, Liability, to be Paid, Year One Discontinued Operations, Disposed of by Sale Discontinued Operations, Disposed of by Sale [Member] 2021 Lessor, Operating Lease, Payment to be Received, Remainder of Fiscal Year Schedule of Equity Method Investments [Table] Schedule of Equity Method Investments [Table] Investments [Abstract] Investments [Abstract] Statement [Line Items] Statement [Line Items] Remaining performance obligations Revenue, Remaining Performance Obligation, Amount Income from discontinued operations, net of tax Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, Net of Tax Stock based compensation Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture LIABILITIES Liabilities [Abstract] 2025 Lessee, Operating Lease, Liability, to be Paid, Year Four Total intangible assets, gross carrying amount Intangible Assets, Gross (Excluding Goodwill) Debt Disclosure [Abstract] Debt Disclosure [Abstract] Weighted average customer life Weighted Average Customer Life Weighted Average Customer Life Entity Address, State or Province Entity Address, State or Province Income before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Interest rate swaps Asset Retirement Obligation, Current Property, Plant and Equipment, Type [Axis] Long-Lived Tangible Asset [Axis] Noncurrent portion of deferred lease revenue Contract with Customer, Liability, Noncurrent Current liabilities held for sale Current liabilities held for sale Disposal Group, Including Discontinued Operation, Liabilities, Current Corporate, Non-Segment Corporate, Non-Segment [Member] Segment Reporting [Abstract] Segment Reporting [Abstract] Additional borrowing capacity available upon request Line Of Credit Facility, Additional Borrowing Capacity Available Upon Request Line Of Credit Facility, Additional Borrowing Capacity Available Upon Request Revenue Disposal Group, Including Discontinued Operation, Revenue Restructuring Cost and Reserve [Line Items] Restructuring Cost and Reserve [Line Items] Variable Rate Component [Axis] Variable Rate Component [Axis] Variable Rate Component Net cash used in financing activities - continuing operations Net Cash Provided by (Used in) Financing Activities, Continuing Operations Entity Shell Company Entity Shell Company Selling, general and administrative Disposal Group, Including Discontinued Operation, Selling, General And Administrative Expense Disposal Group, Including Discontinued Operation, Selling, General And Administrative Expense Local Phone Number Local Phone Number Other comprehensive gain, net of tax (Note 10) Net current period other comprehensive (loss) income Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Finance Leases Finance Lease, Liability, Payment, Due [Abstract] Tower Tower Segment [Member] Tower Segment Net current period other comprehensive (loss) income Other Comprehensive Income (Loss), Tax Prepaid expenses and other Disposal Group, Including Discontinued Operation, Prepaid and Other Assets, Current Total assets Assets Other Other Accrued Liabilities, Noncurrent Investment, Name [Domain] Investment, Name [Domain] Deferred income taxes Deferred Income Taxes and Tax Credits Common stock, shares authorized (in shares) Common Stock, Shares Authorized Total investments Other Long-term Investments Interest payments Interest Paid, Excluding Capitalized Interest, Operating Activities Product and Service [Domain] Product and Service [Domain] 2023 Lessor, Operating Lease, Payment to be Received, Year Two Gain on the sale of discontinued operations, net of tax Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax RLEC & Other Carrier Access Revenue [Member] Carrier Access Revenue [Member] Discontinued Operations Discontinued Operations [Member] Cost method investments Equity Securities, FV-NI, Cost Revolving Credit Facility Revolving Credit Facility [Member] 2021 Lessee, Lease Liability, Payments, Remainder of Fiscal Year Lessee, Lease Liability, Payments, Remainder of Fiscal Year Shares retired for settlement of employee taxes upon issuance of vested equity awards (in shares) Adjustments Related To Tax Withholding For Share-based Compensation, Shares Adjustments Related To Tax Withholding For Share-based Compensation, Shares Cable and fiber Other Machinery and Equipment [Member] Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Valley Network Partnership Valley Network Partnership [Member] Valley Network Partnership [Member] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Entity Tax Identification Number Entity Tax Identification Number Subsequent Event [Line Items] Subsequent Event [Line Items] Variable Rate Component [Domain] Variable Rate Component [Domain] Variable Rate Component [Domain] Plant under construction Asset under Construction [Member] Corporate & Eliminations Corporate and Other [Member] Weighted average shares outstanding, basic (in shares) Basic weighted average shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic Diluted net income per share (in dollars per share) Earnings Per Share, Diluted Segments [Domain] Segments [Domain] Cost of goods sold Product [Member] Variable Rate Component One Variable Rate Component One [Member] Variable Rate Component One Term Loans Term Loans [Member] Term Loans 2026 and thereafter Lessee, Lease Liability, Payments, Due After Year Four Lessee, Lease Liability, Payments, Due After Year Four Indefinite-lived intangible assets acquired Indefinite-lived Intangible Assets Acquired Interest Expense Interest Expense [Member] Related party costs Related Party Costs Subsequent Events Subsequent Events [Text Block] Schedule of Restructuring and Related Costs [Table] Schedule of Restructuring and Related Costs [Table] Intangible assets, net Intangible Assets, Net (Excluding Goodwill) Comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Investment Investment, Policy [Policy Text Block] Restructuring accrual Restructuring Reserve, Current Net cash used in financing activities Net Cash Provided by (Used in) Financing Activities Other comprehensive income: Other Comprehensive Income (Loss), Net of Tax [Abstract] Plant in service Other Plant in Service [Member] Deferred income taxes Deferred Income Tax Liabilities, Net Gain from patronage and investments Income (Loss) from Equity Method Investments Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Basic - Income from continuing operations (in dollars per share) Income (Loss) from Continuing Operations, Per Basic Share Service revenue and other Service revenue and other Service and Other [Member] Service and Other [Member] Reconciliation of Income Taxes Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Expected Maturity of Lease Liabilities, Financing Finance Lease, Liability, Fiscal Year Maturity [Table Text Block] Restructuring expense Expense Restructuring Charges Accounts payable Accounts Payable, Current Current operating lease liabilities Disposal Group, Including Discontinued Operation, Operating Lease, Liability, Current Disposal Group, Including Discontinued Operation, Operating Lease, Liability, Current Depreciation and amortization Depreciation, Depletion and Amortization Accrued compensation Accrued Salaries, Current Dividends payout Dividends, Common Stock Accumulated Other Comprehensive (Loss) Income AOCI Attributable to Parent [Member] Restructuring and Related Costs Restructuring and Related Costs [Table Text Block] Common stock, shares, outstanding (in shares) Beginning balance (in shares) Ending balance (in shares) Common Stock, Shares, Outstanding Investments Long-term Investments Operating lease right-of-use assets Disposal Group, Including Discontinued Operation, Operating Lease, Right-Of-Use Asset, Current Disposal Group, Including Discontinued Operation, Operating Lease, Right-Of-Use Asset, Current Revenue: Revenues [Abstract] AOCI Attributable to Parent [Abstract] AOCI Attributable to Parent [Abstract] Cash disbursed for deposit on FCC spectrum leases Payments to Acquire Intangible Assets Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract] Property, Plant and Equipment Property, Plant and Equipment [Table Text Block] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Income Statement Location [Domain] Income Statement Location [Domain] Term of credit facility Debt Instrument, Term Subscriber relationships Customer Relationships [Member] Property, plant and equipment, net Property, plant and equipment, net Property, Plant and Equipment, Net Total operating expenses Operating Expenses Property, Plant and Equipment Property, Plant and Equipment Disclosure [Text Block] Other liabilities Other liabilities Other Liabilities, Noncurrent Operating Activities [Axis] Operating Activities [Axis] Benefit obligations, at acquisition Defined Benefit Plan, Benefit Obligation 2026 and thereafter Finance Lease, Liability, To Be Paid, After Year Four Finance Lease, Liability, To Be Paid, After Year Four Debt Instrument [Line Items] Debt Instrument [Line Items] Intangible assets, net Disposal Group, Including Discontinued Operation, Intangible Assets, Current Equity Method Investee Equity Method Investee [Member] 2022 Lessee, Lease Liability, Payments, Due Year One Lessee, Lease Liability, Payments, Due Year One Total property, plant and equipment Property, Plant and Equipment, Gross Document Quarterly Report Document Quarterly Report Less: Interest Lessee, Lease Liability, Undiscounted Excess Amount Lessee, Lease Liability, Undiscounted Excess Amount Percentage of patronage credit paid in share Percentage of Patronage Credit Paid in Share Represents the percentage of patronage credits paid in share by the entity. Basic - Income from discontinued operations, net of tax (in dollars per share) Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share Other Commitments [Line Items] Other Commitments [Line Items] Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Goodwill, gross Goodwill, Gross 2023 Lessee, Lease Liability, Payments, Due Year Two Lessee, Lease Liability, Payments, Due Year Two Schedule of Equity Method Investments [Line Items] Schedule of Equity Method Investments [Line Items] Goodwill and Intangible assets, net Intangible Assets, Net (Including Goodwill) Net income per share, basic and diluted: Earnings Per Share, Basic and Diluted [Abstract] Document Fiscal Period Focus Document Fiscal Period Focus Amortization of long-term debt issuance costs Amortization of Debt Issuance Costs Workforce Reduction Program Workforce Reduction Program [Member] Workforce Reduction Program Debt service coverage ratio Debt Instrument, Covenant, Debt Service Coverage Ratio, Minimum Debt Instrument, Covenant, Debt Service Coverage Ratio, Minimum Cash and cash equivalents, beginning of period Cash and cash equivalents, end of period Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Current tax liability Taxes Payable, Current Land improvements Land Improvements [Member] Current assets: Assets, Current [Abstract] Payments for financing arrangements and other Proceeds from (Payments for) Other Financing Activities Gross carrying amount Finite-Lived Intangible Assets, Gross Leases [Abstract] Leases [Abstract] Entity Central Index Key Entity Central Index Key Schedule of Finite-Lived Intangible Assets Schedule of Finite-Lived Intangible Assets [Table Text Block] London Interbank Offered Rate (LIBOR) London Interbank Offered Rate (LIBOR) [Member] Security Exchange Name Security Exchange Name Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Amounts reclassified from accumulated other comprehensive income (loss) to earnings as a result of swap termination Reclassification from AOCI, Current Period, before Tax, Attributable to Parent Disposal Group Classification [Domain] Disposal Group Classification [Domain] Total income from discontinued operations, net of tax Total income from discontinued operations, net of tax Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent Stock options exercised (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Weighted average shares outstanding, diluted (in shares) Diluted weighted average shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Diluted Incremental selling costs Selling Expense Gain on sale of disposition of Wireless assets and operations Disposal Group, Including Discontinued Operation, Other Income Income Taxes Income Tax Disclosure [Text Block] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Related Party [Domain] Related Party [Domain] Current Fiscal Year End Date Current Fiscal Year End Date Basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate Disposal Groups, Including Discontinued Operations Disposal Groups, Including Discontinued Operations [Table Text Block] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Other long-term liabilities: Other Liabilities, Noncurrent [Abstract] Amortized and Capitalized Contract Cost Capitalized Contract Cost [Table Text Block] Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Asset retirement obligations Asset Retirement Obligations, Noncurrent Credit Facility [Axis] Credit Facility [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Net cash provided by (used in) investing activities Net Cash Provided by (Used in) Investing Activities Reconciliation of Operating Profit (Loss) from Segments to Consolidated Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table Text Block] Buildings and structures Building and Building Improvements [Member] Less: accumulated amortization and depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Current income taxes Increase (Decrease) in Income Taxes Receivable Total current liabilities Liabilities, Current Taxes paid for equity award issuances Payment, Tax Withholding, Share-based Payment Arrangement Intersegment Eliminations Intersegment Eliminations [Member] Interest expense and other, net Disposal Group, Including Discontinued Operation, Interest Expense External revenue Entity Wide Information Revenue From External Customer [Abstract] Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Net cash provided by operating activities - continuing operations Net Cash Provided by (Used in) Operating Activities, Continuing Operations Current assets held for sale Current assets held for sale Disposal Group, Including Discontinued Operation, Assets, Current Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] 2021 Finance Lease, Liability, to be Paid, Remainder of Fiscal Year Title of 12(b) Security Title of 12(b) Security Other Other Assets, Current Statement [Table] Statement [Table] Adoption of New Accounting Principles New Accounting Pronouncements, Policy [Policy Text Block] Other Commitments [Axis] Other Commitments [Axis] Other assets Increase (Decrease) in Other Noncurrent Assets Cost of services Cost of Goods and Service, Excluding Depreciation, Depletion, and Amortization Statistical Measurement [Axis] Statistical Measurement [Axis] Property, plant and equipment, net Disposal Group, Including Discontinued Operation, Property, Plant and Equipment, Current Subsequent Event Subsequent Event [Member] Expected tax expense (benefit) at federal statutory Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount Cover [Abstract] Cover [Abstract] (Loss) income from discontinued operations, net of tax Income (Loss) from Discontinued Operations, Net Of Tax, Attributable to Parent, Excluding Gain (Loss) On Disposition Income (Loss) from Discontinued Operations, Net Of Tax, Attributable to Parent, Excluding Gain (Loss) On Disposition Noncurrent portion of financing leases Finance Lease, Liability, Noncurrent Total Finite-Lived Intangible Assets, Net Goodwill Goodwill Commercial Fiber Commercial Fiber [Member] Commercial Fiber Cable franchise rights Franchise Rights [Member] Income taxes payable Accrued Income Taxes, Current 2024 Lessor, Operating Lease, Payment to be Received, Year Three Basis of Presentation and Other Information Nature of Operations [Text Block] Adjustments to reconcile net income to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Operating lease, cost Operating Lease, Cost Investments Investment Holdings [Text Block] Broadband contract acquisition and fulfillment costs Capitalized Contract Cost, Net, Current Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table]