Document and Entity Information Document Type Document Quarterly Report Document Period End Date Document Transition Report Entity File Number Entity Registrant Name Entity Incorporation, State or Country Code Entity Tax Identification Number Entity Address, Address Line One Entity Address, City or Town Entity Address, Country Entity Address, Postal Zip Code Country Region City Area Code Local Phone Number Title of 12(b) Security Trading Symbol Security Exchange Name Entity Current Reporting Status Entity Interactive Data Current Entity Filer Category Entity Small Business Entity Emerging Growth Company Entity Shell Company Entity Common Stock, Shares Outstanding Entity Central Index Key Current Fiscal Year End Date Document Fiscal Year Focus Document Fiscal Period Focus Amendment Flag CONDENSED CONSOLIDATED BALANCE SHEETS Statement [Table] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Represents information pertaining to senior secured notes due 2032. Senior Secured Notes Due 2032 [Member] Senior secured 2032 notes 2032 Notes Indenture Represents the information pertaining to senior unsecured notes due 2027. Senior Unsecured 2027 Notes [Member] Senior unsecured 2027 notes Represents information about secured IPv4 address revenue notes. Secured IPv4 Address Revenue Notes [Member] Secured IPv4 notes Statement [Line Items] Statement Assets [Abstract] Assets Assets, Current [Abstract] Current assets: Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents Restricted Cash Restricted cash Restricted cash Accounts Receivable, after Allowance for Credit Loss, Current Accounts receivable, net of allowance for credit losses of $5,501 and $4,610, respectively Amount due from seller under the IP Transit Services Agreement, net of discount, pursuant to business combination arrangement, classified as current. Business Combination, Amount Due From Seller, Under IP Transit Services Agreement, Net Of Discount, Current Due from T-Mobile, IP Transit Services Agreement, current portion, net of discount of $6,369 and $10,401, respectively Prepaid Expense and Other Assets, Current Prepaid expenses and other current assets Assets, Current Total current assets Property, Plant and Equipment, Net [Abstract] Property and equipment: Property, Plant and Equipment, Gross Property and equipment Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Accumulated depreciation and amortization Property, Plant and Equipment, Net Property and equipment, net Total property and equipment, net Amount of lessee's right to use underlying asset under lease. Lease, Right-of-Use Asset Right-of-use leased assets Indefinite-Lived Intangible Assets (Excluding Goodwill) IPv4 intangible asset Other Intangible Assets, Net Other intangible assets, net Deposits Assets, Noncurrent Deposits and other assets Amount due from seller under the IP Transit Services Agreement, net of discount, pursuant to business combination arrangement, classified as noncurrent. Business Combination, Amount Due From Seller, Under IP Transit Services Agreement, Net Of Discount, Noncurrent Due from T-Mobile, IP Transit Services Agreement, net of discount of $519 and $12,122, respectively Amount due from seller under the purchase agreement, net of discount, pursuant to business combination arrangement, classified as noncurrent. Business Combination, Amount Due From Seller, Under Purchase Agreement, Net Of Discount, Noncurrent Due from T-Mobile, Purchase Agreement, net of discount of $3,081 and $4,006, respectively Discount of payment related to purchase agreement Assets Total assets Liabilities and Equity [Abstract] Liabilities and stockholders' equity Liabilities, Current [Abstract] Current liabilities: Accounts Payable, Current Accounts payable Accrued Liabilities, Current Accrued and other current liabilities Unsecured Debt, Current Senior unsecured 2027 notes, net of unamortized debt costs of $827 and discount of $2,909 Operating Lease, Liability, Current Current maturities Current maturities, operating lease liabilities Finance Lease, Liability, Current Current maturities Finance lease obligations, current maturities Liabilities, Current Total current liabilities Secured Long-term Debt, Noncurrent Secured notes Unsecured Long-term Debt, Noncurrent Senior unsecured 2027 notes, net of unamortized debt costs of $1,236 and discount of $4,344 Operating Lease, Liability, Noncurrent Operating lease liabilities, net of current maturities Lease obligations, net of current maturities Finance Lease, Liability, Noncurrent Finance lease obligations, net of current maturities Lease obligations, net of current maturities Deferred Income Tax Liabilities, Net Deferred income tax liabilities Other Liabilities, Noncurrent Other long-term liabilities Liabilities Total liabilities Commitments and Contingencies. Commitments and contingencies: Stockholders' Equity Attributable to Parent [Abstract] Stockholders' deficit: Common Stock, Value, Issued Common stock, $0.001 par value; 75,000,000 shares authorized; 51,215,736 and 50,062,158 shares issued and outstanding, respectively Additional Paid in Capital, Common Stock Additional paid-in capital Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax Accumulated other comprehensive (loss) income Retained Earnings (Accumulated Deficit) Accumulated deficit Stockholders' Equity Attributable to Parent Balance Balance Total stockholders' deficit Liabilities and Equity Total liabilities and stockholders' deficit Accounts Receivable, Allowance for Credit Loss, Current Accounts receivable, allowance for credit losses Amount of discount on the amount due from seller under the IP Transit Services Agreement, pursuant to the business combination arrangement, classified as current. Business Combination, Amount Due From Seller, Under IP Transit Services Agreement, Current, Amount Of Discount Due from T-Mobile, IP Transit Services Agreement, current portion, discount Amount of discount on the amount due from seller under the IP Transit Services Agreement, pursuant to the business combination arrangement, classified as noncurrent. Business Combination, Amount Due From Seller, Under IP Transit Services Agreement, Noncurrent, Amount Of Discount Due from T-Mobile, IP Transit Services Agreement, noncurrent portion, discount Amount of discount on the amount due from seller under the purchase agreement, pursuant to the business combination arrangement, classified as noncurrent. Business Combination, Amount Due From Seller, Under Purchase Agreement, Noncurrent, Amount Of Discount Estimated Purchase Agreement payment to be received, amount of discount Due from T-Mobile, Purchase Agreement, discount Unamortized debt issuance expense current. Unamortized Debt Issuance Expense Current Unamortized debt issuance expense current Debt Instrument, Unamortized Discount, Current Unamortized debt discount current Unamortized Debt Issuance Expense Unamortized debt costs Debt Instrument, Unamortized Discount, Noncurrent Unamortized debt discount noncurrent Common Stock, Par or Stated Value Per Share Common stock, par value (in dollars per share) Common Stock, Shares Authorized Common stock, shares authorized (in shares) Common Stock, Shares, Issued Balance (in shares) Balance (in shares) Common stock, shares issued (in shares) Common Stock, Shares, Outstanding Common stock, shares outstanding (in shares) CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) Represents information pertaining to senior unsecured notes due 2026. Senior Secured 2026 Notes [Member] 2026 Notes Revenue from Contract with Customer, Including Assessed Tax Revenues Service revenue Costs and Expenses [Abstract] Operating expenses: Cost of Goods and Services Sold Network operations Selling, General and Administrative Expense Selling, general, and administrative Depreciation, Depletion and Amortization Depreciation and amortization Costs and Expenses Total operating expenses Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property Gains on asset sales Gain (Loss) on Termination of Lease Gains on finance lease terminations Operating Income (Loss) Operating income (loss) Amount of interest expense classified as non-operating including amount of increase (decrease) in the fair value of derivatives recognized in the income statement. Interest Expense Non-operating And Derivative Gain Loss On Derivative Net Interest expense, including change in valuation interest rate swap agreement Gains (Losses) on Extinguishment of Debt Loss on debt extinguishment and redemption Gain on debt extinguishment and redemption Gain (Loss) on debt extinguishment and redemption Amount of nonoperating interest income (expense) from IP Transit Agreement. Interest Income (Expense), Nonoperating, Internet Protocol Transit Agreement Interest income - IP Transit Services Agreement Amount of nonoperating interest income (expense) from Purchase Agreement. Interest Income (Expense), Nonoperating, Purchase Agreement Interest income - Purchase Agreement Other Nonoperating Income (Expense) Interest income and other, net Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Income (loss) before income taxes Total Income Tax Expense (Benefit) Income tax (provision) benefit Net income (loss) Net income (loss) Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] Comprehensive income (loss): Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent Foreign currency translation adjustment Foreign currency translation Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive income (loss) Earnings Per Share [Abstract] Net income (loss) per common share: Earnings Per Share, Basic Basic net loss per common share (in dollars per share) Earnings Per Share, Diluted Diluted net loss per common share (in dollars per share) Common Stock, Dividends, Per Share, Declared Dividends declared per common share (in dollars per share) Weighted Average Number of Shares Outstanding, Basic Weighted-average common shares - basic (in shares) Weighted-average common shares - basic Weighted Average Number of Shares Outstanding, Diluted Weighted-average common shares - diluted (in shares) Weighted-average common shares - diluted Location, Statement of Income, Balance [Axis] Share-Based Payment Arrangement, Expense Equity-based compensation expense Equity-based compensation expense (net of amounts capitalized) CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] Cash flows from operating activities: Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net income (loss) Adjustments, Noncash Items, to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income (loss) to net cash used in operating activities: Amortization of Debt Issuance Costs and Discounts Amortization of debt costs and discounts Amortization of discount on the amount due from seller pursuant to the business combination arrangement. Business Combination, Amortization Of Discount On Amount Due From Seller Amortization of discounts, due from T-Mobile, IP Transit Services & Purchase Agreements Amount of gain (loss) on sale or disposal of assets and termination of lease before expiration of lease term. Gain (Loss) on Disposition of Assets and Finance Lease Terminations Gains on asset sales and finance lease terminations Deferred Income Tax Expense (Benefit) Deferred income taxes Increase (Decrease) in Operating Capital [Abstract] Changes in operating assets and liabilities: Increase (Decrease) in Accounts Receivable Accounts receivable Increase (Decrease) in Prepaid Expense and Other Assets Prepaid expenses and other current assets Increase (Decrease) in Operating Liabilities Accounts payable, accrued liabilities and other long-term liabilities The amount of increase (decrease) during the period in the amount of customer money held in customer accounts, including security deposits, collateral for a current or future transaction. Increase Decrease in Contract with Customer, Refund Liability Deposits and other assets Net Cash Provided by (Used in) Operating Activities, Continuing Operations Net cash provided by (used in) operating activities Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract] Cash flows from investing activities: Proceeds from Sale of Property, Plant, and Equipment Net proceeds Proceeds from sale of data center assets, net Amount of proceeds received from seller under the IP Transit Agreement, pursuant to business combination arrangement, classified as investing activities. Proceeds from Consideration Received Under IP Transit Agreement, Classified As Investing Activities Cash receipts - IP Transit Services Agreement - T-Mobile Payments to Acquire Property, Plant, and Equipment Purchases of property and equipment Net Cash Provided by (Used in) Investing Activities, Continuing Operations Net cash provided by (used in) investing activities Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract] Cash flows from financing activities: Payments of Dividends Dividends paid Payments for Repurchase of Common Stock Purchases of common stock Purchase of common stock under buy back program Proceeds from Issuance of Secured Debt Net proceeds from issuance Proceeds from issuance of secured debt The cash outflow to repayment of notes that is secured by collateral. Redemption and extinguishment of secured Notes Debt extinguishment and redemption Proceeds from Stock Options Exercised Proceeds from exercises of stock options Finance Lease, Principal Payments Principal payments of finance lease obligations Lease payments Net Cash Provided by (Used in) Financing Activities, Continuing Operations Net cash (used in) provided by financing activities Effect of Exchange Rate on Cash and Cash Equivalents, Continuing Operations Effect of exchange rates changes on cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Net increase in cash, cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash, cash equivalents and restricted cash, end of period Cash, cash equivalents and restricted cash, beginning of period Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Supplemental disclosure of non-cash financing activities: Lease Obligation Incurred Finance lease obligations incurred Payments of Debt Issuance Costs Debt costs Description of the business: Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block] Description of the business: Property and equipment: Property, Plant and Equipment Disclosure [Text Block] Property and equipment: Long-term debt: Long-term Debt [Text Block] Long-term debt: Commitments and contingencies: Commitments and Contingencies Disclosure [Text Block] Commitments and contingencies: Income taxes: Income Tax Disclosure [Text Block] Income taxes: Common stock buyback program: The entire disclosure for purchase of shares under stock repurchase plan. Stock Repurchase Program [Text Block] Common stock buyback program: No definition available. Dividends on common stock: No definition available. Dividends On Common Stock [Text Block] Dividends on common stock: Related party transactions: Related Party Transactions Disclosure [Text Block] Related party transactions: Geographic and segment information: Segment Reporting Disclosure [Text Block] Geographic and segment information: Subsequent events: Subsequent Events [Text Block] Subsequent events: New Accounting Pronouncements, Policy [Policy Text Block] Accounting Standards Not Yet Adopted Basis of Accounting, Policy [Policy Text Block] Basis of presentation Use of Estimates, Policy [Policy Text Block] Use of estimates Fair Value of Financial Instruments, Policy [Policy Text Block] Financial instruments Disclosure of accounting policy for restricted cash and interest rate swap agreement. Restricted Cash And Interest Rate Swap Agreement [Policy Text Block] Restricted cash Revenue Recognition Accounting Policy, Gross and Net Revenue Disclosure [Policy Text Block] Gross receipts taxes, universal service fund and other surcharges Earnings Per Share, Policy [Policy Text Block] Basic and diluted net loss per common share Stockholders' Equity, Policy [Policy Text Block] Stockholders' (Deficit) Equity Revenue Recognition, Policy [Policy Text Block] Revenue recognition Lessee, Leases [Policy Text Block] Leases Asset Retirement Obligation [Policy Text Block] Asset Retirement Obligations Schedule of Weighted Average Number of Shares [Table Text Block] Schedule of diluted weighted average shares Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Schedule of details unvested shares of restricted common stock as well as the anti-dilutive effects of stock options and restricted stock awards outstanding Schedule of Stockholders Equity [Table Text Block] Schedule of stockholders' (Deficit) Equity Disaggregation of Revenue [Table Text Block] Schedule of revenue for termination fees Lease, Cost [Table Text Block] Schedule of lease cost Lessor, Operating Lease, Payments to be Received, Maturity [Table Text Block] Schedule of future minimum payments under these operating lease agreements Finance Lease, Liability, Maturity [Table Text Block] Schedule of future minimum payments under these finance lease agreements Property, Plant and Equipment [Table Text Block] Schedule of property and equipment Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block] Schedule of components of income (loss) before income taxes Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block] Schedule of service revenues and long-lived assets by geographic region Schedule of Business Acquisitions, by Acquisition [Table] Statistical Measurement [Axis] Statistical Measurement [Domain] Minimum [Member] Minimum Maximum [Member] Maximum Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Represents the information pertaining to Wireline Network Holdings LLC. Wireline Network Holdings LLC [Member] Wireline Network Holdings LLC Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Customer Relationships [Member] Customer relationships Collaborative Arrangement and Arrangement Other than Collaborative [Axis] Collaborative Arrangement and Arrangement Other than Collaborative [Domain] This member is stands for membership interest purchase agreement. Membership Interest Purchase Agreement [Member] Purchase Agreement Represents the information pertaining to IP Transit Services Agreement. Internet Protocol, Transit Services Agreement [Member] IP Transit Services Agreement Counterparty Name [Axis] Counterparty Name [Domain] This member stands for T Mobile Affiliate. T Mobile Affiliate [Member] T-Mobile affiliate Scenario [Axis] Scenario, Unspecified [Domain] This member stands for equal monthly installments during the first year after the Closing. Equal Monthly Installments During The First Year After The Closing [Member] Equal monthly installments during the first year after the Closing This member stands for equal monthly installments over the subsequent 42 months. Equal Monthly Installments Over The Subsequent Forty Two Months [Member] Equal monthly installments over the subsequent 42 months Represents the information pertaining to per month during first year after closing date. Per Month During First Year After Closing Date [Member] Per Month During First Year After Closing Date Represents the information pertaining to per month over subsequent 42 months. Per Month Over Subsequent Forty Two Months [Member] Per Month Over Subsequent Forty Two Months Legal Entity [Axis] Entity [Domain] Represents the information pertaining to Cogent Infrastructure, Inc., Cogent Infrastructure, Inc., [Member] Buyer Consolidated Entities [Axis] Consolidated Entities [Domain] Represents the information pertaining to T-Mobile USA, Inc., T-Mobile USA, Inc., [Member] T-Mobile USA, Inc., Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Represents information relating to optical fiber and rights of way Optical Fiber and Rights of Way [Member] Optical fiber and rights of way Business Acquisition [Line Items] Description of the business and summary of significant accounting policies: Number of Countries in which Entity Operates Number of countries entity operates Represents the speed per second of bandwidth. Speed Per Second to Bandwidth Intensive Users On-net service speed range Business Combination, Consideration Transferred Amount payable Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents Cash and cash equivalents Amount of working capital adjustments assumed in business combination. Business Combination, Recognized Identifiable Asset Acquired and Liability Assumed, Working Capital Adjustment Working capital adjustment Amount of adjustment of additional working capital for purchase of interest under purchase agreement. Adjustment Of Additional Working capital For Purchase Of Interest Additional working capital adjustment The Cash outflow associated with payment made to seller in relation to reduction in consideration to be received in business combination transaction. Payment To Seller For Reduction In consideration Short term lease payment Amount of estimated payment related to acquired short-term lease obligations in a business combination transaction. Business Combination, Estimated Payment Related To Acquired Short-Term Lease Obligations Estimated payment related to acquired short-term lease obligations Number of equal payments in which the estimated payment related to acquired short-term lease obligations in a business combination transaction, is to be made. Business Combination, Estimated Payment Related To Acquired Short-Term Lease Obligations, Number Of Equal Payments Estimated payment related to acquired short-term lease obligations, number of equal payments Period after the closing date in which the estimated payment related to acquired short-term lease obligations in a business combination transaction, is to be made. Business Combination, Estimated Payment Related To Acquired Short-Term Lease Obligations, Payment Period Estimated payment related to acquired short-term lease obligations, payment period after closing date Amount of reduction to acquired short-term lease obligations in a business combination transaction. Business Combination, Reduction of Acquired Short Term Lease Obligations Reduction in short term lease payment Investment Income, Net, Amortization of Discount and Premium Amortization of income Payments to Acquire Businesses, Gross Consideration paid Amount of discount on the amount due from seller under the purchase agreement, pursuant to the business combination arrangement, classified as noncurrent. Business Combination, Amount Due From Seller, Under IP Transit Services Agreement, Amount Of Discount Amounts due from Seller - IP Transit Services Agreement, amount of discount Investment Income, Amortization of Discount Amortization of discount resulted in interest income Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Total property and equipment Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill Intangible asset acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles Intangible assets Finite-Lived Intangible Asset, Useful Life Acquired customer relationships, estimated useful life (in years) Amortization of Intangible Assets Amortization of intangible assets Amount of future amortization expense per year, on finite lived intangible assets acquired by the entity. Acquired Finite-Lived Intangible Assets, Future Amortization Expense Per Year Acquired customer relationships, future amortization expense per year Acquired Finite-lived Intangible Assets, Weighted Average Useful Life Acquired customer relationships, future amortization expense, amortization period (in years) Impairment of Intangible Assets, Indefinite-Lived (Excluding Goodwill) Impairment recorded Fair Value Measurements, Recurring and Nonrecurring [Table] Represents the member information pertaining to Senior Unsecured Mirror Notes due 2027 (the "2027 Mirror Notes"). Senior Unsecured Mirror Notes due 2027 [Member] Senior Unsecured Mirror Notes due 2027 Represents the member information pertaining to Secured IPv4 notes (the "IPv4Notes"). Secured IPv4 Notes [Member] Secured IPv4 Notes Fair Value, Hierarchy [Axis] Fair Value Hierarchy [Domain] Fair Value, Inputs, Level 2 [Member] Level 2 Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Description of the business and summary of significant accounting policies: Long-term Debt, Gross Aggregate principal amount Senior notes outstanding Debt Instrument, Interest Rate, Stated Percentage Interest rate (as a percent) Debt Instrument, Fair Value Disclosure Fair value of aggregate principal amount Derivative Instrument [Axis] Derivative Contract [Domain] Interest Rate Swap [Member] Interest rate swap Restricted Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Domain] Represents information pertaining to restricted cash. Restricted Cash [Member] Restricted cash Derivative, Fair Value, Net Fair value of interest rate swaps Net liability Excise and Sales Taxes Excise taxes and surcharge Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Restricted Stock [Member] Restricted stock Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Description of the business and summary of significant accounting policies: Diluted weighted average shares Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Dilutive effect Earnings Per Share, Diluted, Other Disclosures [Abstract] Anti-dilutive effects Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Unvested shares of restricted common stock Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Anti-dilutive Schedule of description of the business. Description of the Business [Table] Equity Components [Axis] Equity Component [Domain] Common Stock [Member] Common Stock Additional Paid-in Capital [Member] Additional Paid-in Capital Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Accumulated Other Comprehensive Income (Loss) Retained Earnings [Member] Accumulated Equity (Deficit) 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. Description of the Business [Line Items] Description of the business: Increase (Decrease) in Stockholders' Equity [Roll Forward] Stockholders' (Deficit) Equity Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period Forfeitures of shares granted to employees (in shares) Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Equity-based compensation Stock Issued During Period, Value, New Issues Issuances of common stock Stock Issued During Period, Shares, New Issues Issuances of common stock (in shares) Stock Issued During Period, Value, Stock Options Exercised Exercises of options Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Exercises of options (in shares) Stock Repurchased and Retired During Period, Value Common stock purchases and retirement Stock Repurchased and Retired During Period, Shares Common stock purchases and retirement (in shares) Dividends, Common Stock, Cash Dividends paid Accounting Standards Update and Change in Accounting Principle [Table] Recent accounting pronouncements- adopted Description of the business and summary of significant accounting policies: Contract with Customer, Liability, Revenue Recognized Service revenue recognized from deferred revenue balance at beginning of period Capitalized Contract Cost, Amortization Amortization expense for contract costs No definition. Cash Paid For Amounts Included In The Measurement of Lease Liabilities [Abstract] Cash paid for amounts included in the measurement of lease liabilities Finance Lease, Right-of-Use Asset, Amortization Amortization of right-of-use assets Finance Lease, Interest Expense Interest expense on finance lease liabilities Operating Lease, Cost Operating lease cost Lease, Cost Total lease costs Finance Lease, Interest Payment on Liability Operating cash flows from finance leases Operating Lease, Payments Operating cash flows from operating leases Amount of cash outflow for principal payments and settlements on finance lease. Finance Lease Principal Payments and Settlement Financing cash flows from finance leases Right-of-Use Asset Obtained in Exchange for Finance Lease Liability Right-of-use assets obtained in exchange for new finance lease liabilities Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Right-of-use assets obtained in exchange for new operating lease liabilities Finance Lease, Weighted Average Remaining Lease Term Weighted-average remaining lease term - finance leases (in years) Operating Lease, Weighted Average Remaining Lease Term Weighted-average remaining lease term - operating leases (in years) Finance Lease, Weighted Average Discount Rate, Percent Weighted-average discount rate - finance leases Operating Lease, Weighted Average Discount Rate, Percent Weighted-average discount rate - operating leases no definition available. Finance Leases Fiber Lease Agreements [Abstract] Finance leases-fiber lease agreements Lessee, Finance Lease, Term of Contract Initial terms (in years) Amount of lessee's additional undiscounted obligation for lease payments for finance lease. Finance Lease Liability Payments Due, Additional Additional finance lease future payments due Operating Lease Liabilities, Payments, Due, Rolling Maturity [Abstract] Future minimum payments under these operating lease agreements Lessee, Operating Lease, Liability, Payments, Due Next Rolling Twelve Months 2027 Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Two 2028 Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Three 2029 Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Four 2030 Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Five 2031 Lessee, Operating Lease, Liability, Payments, Due after Rolling Year Five Thereafter Lessee, Operating Lease, Liability, Payments, Due Total minimum lease obligations Lessee, Operating Lease, Liability, Undiscounted Excess Amount Less-amounts representing interest Operating Lease, Liability Present value of minimum lease obligations Finance Lease Liabilities, Payments, Rolling Maturity [Abstract] Future minimum payments under these finance lease agreements Finance Lease, Liability, Payments, Due in Next Rolling Twelve Months 2027 Finance Lease, Liability, Payments, Due in Rolling Year Two 2028 Finance Lease, Liability, Payments, Due in Rolling Year Three 2029 Finance Lease, Liability, Payments, Due in Rolling Year Four 2030 Finance Lease, Liability, Payments, Due in Rolling Year Five 2031 Finance Lease, Liability, Payments, Due in Rolling after Year Five Thereafter Finance Lease, Liability, Payments, Due Total minimum lease obligations Finance Lease, Liability, Undiscounted Excess Amount Less-amounts representing interest Finance Lease, Liability Present value of minimum lease obligations Property, Plant and Equipment [Table] Property, Plant and Equipment [Line Items] Property and equipment: Depreciation, Depletion and Amortization, Nonproduction Depreciation and amortization expense Represents the compensation costs the entity capitalizes as a part of property, plant and equipment. Property, Plant and Equipment Compensation Costs Capitalized Capitalized compensation cost Represents information pertaining to data center buildings and land. Data Center Buildings And Land [Member] Data center buildings and land Number of data centers buildings. Number Of Data Center Buildings Number of data centers buildings Gain (Loss) on Disposition of Property Plant Equipment Gain on property plant equipment Schedule of Long-Term Debt Instruments [Table] Represents the member information pertaining to Senior Unsecured Mirror Notes due 2027 (the "2027 Mirror Notes"). Senior Unsecured 2027 Notes, One [Member] 2027 Mirror Notes Represents information pertaining to senior unsecured notes due 2027. Senior Unsecured Notes of 7.00 Due 2027 [Member] 2027 Notes Represents information about existing IPv4 notes. Existing IPv4 Notes [Member] Existing IPv4 Notes Represents information about IPv4 new notes. IPv4 New Notes [Member] IPv4 New Notes Represents the information pertaining to the scenario when issuers may redeem some or whole of the notes. Issuers May Redeem Some or All Notes [Member] Redemption of some or all the notes Represents the information pertaining to the scenario when issuers may redeem 40% of the notes. Issuers May redeem Up To 40 Percentage of Notes [Member] Issuers may redeem up to 40% of notes Represents information pertaining to scenario where debt is redeemed after July 1, 2028. Redemption After July 1, 2028 [Member] Redemption after July 1, 2028 Represents information pertaining to scenario when there is change in control accompanied by certain rating events. Changes In Control Accompanied By Certain Rating Events [Member] Change in control accompanied by certain rating events Represents the information pertaining to, if the group undergoes any changes during the stated period. If Certain Events Have Occurred [Member] If certain events have occurred Represents the information pertaining to, if the group does not undergo any changes during the stated period. If Certain Events Have Not Occurred [Member] If certain events have not occurred This member stands for issuance of additional class notes. Issuance Of Additional Class Notes [Member] Issuance Of Additional Class Notes Substitute New Ipv4 Addresses. Substitute New Ipv4 Addresses [Member] Substitute New Ipv4 Addresses Dispose Of Ipv Addresses Owned By Ipv Issuer Member Dispose Of Ipv Addresses Owned By Ipv Issuer. Dispose Of Ipv Addresses Owned By Ipv Issuer Member Dispose Of Ipv Addresses Owned By Ipv Issuer [Member] Dispose Of Ipv Addresses Owned By Ipv Issuer Member Dispose Of Ipv Addresses Owned By Ipv Issuer Variable Rate [Axis] Variable Rate [Domain] Base Rate [Member] Base Rate US Treasury (UST) Interest Rate [Member] US Treasury (UST) Interest Rate Location, Statement of Financial Position, Balance [Axis] Cash [Member] Cash Represents information pertaining to unrestricted cash. Unrestricted Cash [Member] Unrestricted cash Debt Instrument, Redemption, Period [Axis] Debt Instrument, Redemption, Period [Domain] Debt Instrument Redemption Period Three [Member] June 15, 2024 to June 14, 2025 Debt Instrument [Line Items] Long-term debt Debt Instrument, Face Amount Face amount Original amount of debt instrument at time of issuance. Debt Instrument, Original Debt Amount Original amount of debt Repayments of Unsecured Debt Repayments of debt Debt Instrument, Repurchased Face Amount Aggregate principal amount Average redemption price of debt instrument. Debt Instrument, Average Redemption Price Average redemption price Percentage of basis points added related to an expense incurred on debt. Debt Instrument, Basis Point Fee Debt instrument, Basis point fee Amount of cash outflow for payment of basis point fee. Payment Of Basis Point Fee Payment of basis point fee Represents the secured leverage ratio. Secured Leverage Ratio Consolidated secured leverage ratio Percentage of proceeds used for repurchase of the debt. Debt Instrument, Proceeds Used For Repurchase, Percentage Percentage of debt instrument, proceeds used for repurchase Amount of minimum debt to be redeemed through proceeds from sale of assets. Debt Instrument, Minimum Redemption Amount Minimum debt to be redeemed through proceeds from sale of assets The cash inflow net of tax from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. Proceeds From Sale Of Property, Plant, And Equipment, Net Of Tax Proceeds from sale of property, plant, and equipment, net of tax Number of sale of data center facilities. Number Of Sale Of Data Center Facilities Number of sale of data center facilities Amount of cash restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Proceeds Considered Restricted Cash Net proceeds held as restricted cash The amount of future net proceeds expected to be received from the sale of specified assets that the company is required to place into restricted cash under the terms of a debt agreement or other contractual arrangement. Future Net Proceeds from Sale to be Included as Restricted Cash Future net proceeds The target amount of net proceeds from data center sales that are required to be received and designated as restricted cash under the terms of the Supplemental Indenture. Target Data Center Proceeds Target amount of net proceeds from data center sales Amount represents for redemption value price. Redemption Value Redemption value Amount of net proceeds from offering used for debt redemption. Debt Instrument, Net Proceeds From Offering, Redemption Amount Amount of net proceeds from offering Amount of settlement payment made on debt redemption. Debt Instrument, Redemption, Settlement Payment Amount of settlement payment Amount of accrued interest redeemed on debt redemption. Debt Instrument, Redemption, Accrued Interest Amount of accrued interest redeemed It represents the amount of loss on extinguishment and redemption of 2026 notes. Loss On Debt Extinguishment And Redemption 2026 Notes Loss on extinguishment & redemption of 2026 notes Percentage of principal amount of debt repurchased. Debt Instrument, Repurchase Price, Percentage of Principal Amount Repurchased Repurchase price, percentage of principal amount repurchased Debt Instrument, Redemption Price, Percentage Redemption price percentage Percentage of principal amount of debt repurchased in cash. Debt Instrument, Repurchase Price in Cash, Percentage of Principal Amount Repurchased Repurchase price in cash, percentage The minimum percentage of aggregate principal amount of debt to be held by holders to exercise redemption option. Minimum Percentage of Principal Amount by Debt Holders Entitled To Exercise Redemption Minimum percentage of principal amount entitled for redemption Percentage of outstanding long-term debt or borrowing associated with any securities or credit agreement for which there has been a default in principal, interest, sinking fund, or redemption provisions, or any breach of covenant that existed at the end of the period and subsequently has not been cured. Debt Instrument, Debt Default, Percentage of Principal Amount Percentage of principal amount considered as default debt Amount of net proceeds after offering cost of debt that is restricted. Debt Instrument, Restricted Value Debt instrument restricted value Amount of net proceeds after offering cost of debt that is unrestricted. Debt Instrument, Unrestricted Value Debt instrument unrestricted value Amount of cash released from restriction made earlier on net proceeds from notes issued. Debt Instrument, Amount Released From Restriction Restriction on restricted cash Debt Instrument, Maturity Date Maturity date The percentage of principal amount on which additional interest is accrued. Debt instrument, Percentage of Principal Amount on Which Additional Interest is Accrued Additional interest accrued on percentage of principal amount Debt Instrument, Basis Spread on Variable Rate Debt instrument basis spread on variable rate Represents the percentage of noteholders voting rights to amend note covenants. Percentage Of Noteholders Voting Rights To Amend Covenants Percentage of noteholders voting rights to amend covenants Ratio of Indebtedness to Net Capital Consolidated leverage ratio Represents the debt instrument issued expressed as a percentage of face value Debt Instrument, Issued, Percentage of Face Value Percentage of face value Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed Redemption price percentage of principal amount redeemed Represents the discount on issuance of debt. Debt Instrument, Discount on Issuance Discount on issuance of debt Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration] Debt Instrument, Interest Rate During Period Interest rate (as a percent) Margin Deposit Assets Margin deposits Payments for Derivative Instrument, Financing Activities Payment for settlement The amount of cash deposits released on settlement of derivative instrument during the period. Cash Deposits Released Represents information pertaining to 2032 Notes, 2027 Notes and 2027 Mirror Notes. Notes 2032, Notes 2027 And Mirror Notes 2027 [Member] Indentures Represents information pertaining to 2027 Notes Indenture and 2027 Mirror Notes Indenture. Notes Indenture 2027 and Mirror Notes Indenture 2027 [Member] 2027 Notes Indentures Represents the fixed charge coverage ratio. Fixed Charge Coverage Ratio Fixed charge coverage ratio The amount of indebtedness that may occur. Debt Instrument, Indebtedness Amount May Occur Indebtedness that may occur Amount held by holdings in cash and cash equivalents which is permitted for investment payments. Debt Instrument Covenant Permitted Investments and Payments Amount unrestricted and permitted for investment payments Gain Contingencies [Table] Gain Contingencies [Line Items] Commitments and contingencies Loss Contingency, Range of Possible Loss, Portion Not Accrued Estimate of possible loss in excess of accrual Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest [Abstract] Components of income (loss) before income taxes Income (Loss) from Continuing Operations before Income Taxes, Domestic Domestic Income (Loss) from Continuing Operations before Income Taxes, Foreign Foreign Share Repurchase Program [Table] Share Repurchase Program [Line Items] Common stock buyback program: Stock Repurchased During Period, Shares Purchase of common stock under buyback program (in shares) Stock Repurchase Program, Remaining Authorized Repurchase Amount Remaining authorized amount for common stock repurchases Stock Repurchased During Period, Value Cost of shares of common stock No definition available. Stockholders Equity [Table] Dividends [Axis] Dividends [Domain] Represents information pertaining to Q3 2026 ordinary dividends. O 2026 Q3 Dividends [Member] O 2026 Q3 Dividends Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event [Member] Subsequent Events No definition available. Stockholders Equity [Line Items] Dividends on common stock Dividends on common stock and return of capital program Dividends on common stock Payments of Ordinary Dividends, Common Stock Dividends paid Common Stock, Dividends, Per Share, Cash Paid Dividends paid per share (in dollars per share) Dividends Payable, Date Declared Dividends, date of approval Dividends Payable, Current Dividends payable Dividends Payable, Date to be Paid Dividends payable date Schedule of Related Party Transactions, by Related Party [Table] Related Party [Axis] Related Party [Domain] Related Party [Member] Related party Related Party Transaction [Axis] Related Party Transaction [Domain] Lease Agreements [Member] Lease This member stands for Office Lease. Office Lease [Member] Office Lease This member stands for Network Operations Lease. Network Operations Lease [Member] Network Operations Lease Represents the information pertaining to Second Amendment to the Office Lease (the "Amendment"), with Germanium which amends the Lease for technical space under the Network Operations Lease. Second Amendment to Office Lease with Germanium LLC which Amends Lease for Technical Space under Network Operations Lease [Member] Amendment This member stands for Sodium LLC. Sodium LLC [Member] Sodium LLC Represents information pertaining to member or person with designation of chief executive officer. Thorium LLC [Member] Thorium LLC Represents information pertaining to a firm or person with designation of chief executive officer. Germanium LLC [Member] Germanium LLC Represents the information pertaining to auditorium suitable for training. Auditorium Suitable for Training [Member] Auditorium suitable for training Represents the information pertaining to data center in building. Data Center in Building [Member] Data center in building Related Party Transaction [Line Items] Related party transactions Amount of the fixed annual rent per year under lease agreement. Operating Lease, Fixed Annual Rent Fixed annual rent Lessee, Operating Lease, Term of Contract Lease term (in years) Represents the notice period required for cancellation of lease Lessee, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Lessee Leasing Arrangements Required Notice Period for Cancellation of Lease Notice period for cancellation of lease Area of Land Area of land Amount of the additional fixed annual rent per year under lease agreement. Operating Lease, Additional Fixed Annual Rent Additional fixed annual rent Payments for Rent Payment made for rent and related costs Schedule of Revenues from External Customers and Long-Lived Assets [Table] Geographical [Axis] Geographical [Domain] North America [Member] North America Europe [Member] Europe South America [Member] South America Represents information pertaining to Oceania. Oceania [Member] Oceania Africa [Member] Africa Represents information pertaining to "Europe and other" Europe and other [Member] Europe and other Product and Service [Axis] Product and Service [Domain] Represents information pertaining to net services provided by organization. On-net [Member] On-net IP Represents information pertaining to off net services provided by organization. Off-net [Member] Off-net IP Represents information pertaining to wavelength services provided by organization. Wavelength Services [Member] Wavelength Represents information pertaining to non core services provided by organization. Non-core [Member] Non-core Revenues from External Customers and Long-Lived Assets [Line Items] Segment information Number of Operating Segments Number of operating segments Long-Lived Assets Long lived assets, net Subsequent Event [Table] Subsequent Event [Line Items] Subsequent events: Cumulative amount of debt instrument redeemed and retired. Debt Instrument, Repurchase, Cumulative Amount Cumulative amount of debt instrument redeemed and retired Amount of repurchase target under the supplemental indenture. Debt Instrument, Repurchase Requirement, Total Total repurchases under supplemental indenture Represents information pertaining to Thaddeus Weed. Thaddeus Weed [Member] Thaddeus Weed