COGENT COMMUNICATIONS HOLDINGS, INC.CCOI
| Dec 31, 2011 | Dec 31, 2012 | Dec 31, 2013 | Dec 31, 2014 | Dec 31, 2015 | Dec 31, 2016 | Dec 31, 2017 | Dec 31, 2018 | Dec 31, 2019 | Dec 31, 2020 | Dec 31, 2021 | Dec 31, 2022 | Dec 31, 2023 | Dec 31, 2024 |
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| Net (loss) income | - | - | - | - | - | - | - | 29 | 38 | 6 | 48 | 5 | 1,273 | -204 |
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| Depreciation and amortization | 60 | 62 | 64 | 69 | 71 | 75 | 76 | 81 | 80 | 84 | 89 | 92 | - | - |
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| Amortization of Debt Discount (Premium) | - | - | 6 | 2 | 0 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 1 | 4 |
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| Business Combination, Amortization Of Discount On Amount Due From Seller | - | - | - | - | - | - | - | - | - | - | - | - | -29 | -25 |
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| Share-Based Payment Arrangement, Expense | - | - | - | - | - | - | - | 18 | 19 | 24 | 27 | 24 | 27 | 26 |
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| Gain on bargain purchase - Sprint Business | - | - | - | - | - | - | - | - | - | - | - | - | 1,406 | 22 |
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| Foreign currency exchange gain on 2024 Notes | - | - | - | - | - | - | - | - | 2 | -37 | 33 | 32 | - | - |
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| Gain - lease termination | - | - | - | - | - | - | - | - | - | - | 7 | - | - | 3 |
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| Gains-equipment transactions and other, net | 0 | 1 | 1 | 10 | 5 | 8 | 5 | 1 | 0 | 1 | -0 | -0 | -0 | - |
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| Deferred income taxes | - | - | - | - | -8 | 9 | 25 | 11 | 12 | 0 | 18 | 17 | -70 | -52 |
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| Accounts receivable | 2 | -1 | 6 | 4 | -1 | 3 | 4 | 3 | -1 | 3 | -1 | 3 | 51 | -39 |
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| Prepaid expenses and other current assets | 1 | -0 | 4 | 2 | 3 | 3 | -1 | 0 | 4 | 3 | 0 | 7 | 11 | 6 |
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| Due to T-Mobile - Transition Services Agreement | - | - | - | - | - | - | - | - | - | - | - | - | 67 | -66 |
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| Due from T-Mobile - Transition Services Agreement | - | - | - | - | - | - | - | - | - | - | - | - | 5 | -4 |
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| Deposits and other assets | - | - | - | - | - | - | - | - | -1 | -1 | -0 | -0 | -2 | -4 |
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| Increase (Decrease) in Operating Liabilities | 6 | 4 | 6 | 4 | -3 | 10 | -3 | -0 | 5 | -3 | 10 | 21 | 29 | 3 |
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| Net cash (used in) provided by operating activities | - | - | - | - | - | - | 112 | 134 | 149 | 140 | 170 | 174 | 17 | -9 |
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| Cash receipts - IP Transit Services Agreement - T-Mobile | - | - | - | - | - | - | - | - | - | - | - | - | 204 | 204 |
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| Acquisition of Sprint Business, net of $47.1 million of cash acquired in 2023 | - | - | - | - | - | - | - | - | - | - | - | - | -2 | -12 |
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| Purchases of property and equipment | 46 | 44 | 49 | 60 | 36 | 45 | 46 | 50 | 47 | 56 | 70 | 79 | 130 | 195 |
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| Net cash provided by (used in) investing activities | - | - | - | - | - | - | -46 | -50 | -47 | -56 | -70 | -79 | 77 | 21 |
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| Proceeds from Issuance of Unsecured Debt | - | - | - | - | - | - | - | - | - | - | - | 446 | - | 292 |
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| Secured IPv4 notes | - | - | - | - | - | - | - | - | - | - | - | - | - | 198 |
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| Proceeds from Issuance of Secured Debt | - | - | - | - | - | 124 | - | 70 | - | - | 497 | - | - | - |
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| Dividends paid | - | - | - | - | 66 | 68 | 82 | 98 | 113 | 129 | 150 | 170 | 182 | 189 |
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| Purchases and retirement of common stock | 3 | 1 | - | 59 | 39 | 4 | 2 | 7 | - | 4 | - | - | - | 8 |
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| Principal payments of finance lease obligations | - | - | - | - | - | - | - | - | 9 | 24 | 23 | 45 | 77 | - |
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| Settlement of a finance lease - at a discount | - | - | - | - | - | - | - | - | - | - | - | - | - | 115 |
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| Principal payments of installment payment agreement | - | - | - | - | 1 | 21 | 4 | 9 | 10 | 11 | 7 | 1 | - | - |
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| Proceeds from Stock Options Exercised | 1 | 0 | 1 | 1 | 0 | 1 | 1 | 2 | 2 | 1 | 2 | 1 | 1 | 2 |
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| Net cash provided by (used in) financing activities | - | - | - | - | - | - | -97 | -53 | 22 | -116 | -141 | -145 | -258 | 106 |
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| Effect of exchange rate changes on cash | - | - | - | - | - | - | - | - | - | - | - | - | 2 | -5 |
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| Net increase (decrease) in cash and cash equivalents & restricted cash | - | - | - | - | - | - | - | - | 123 | -28 | -43 | -53 | -162 | 114 |
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| Interest Paid | - | - | - | - | - | - | - | 49 | 56 | 63 | 59 | 66 | 105 | 134 |
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| Income Taxes Paid | 1 | 0 | 1 | 2 | 1 | 0 | 0 | 2 | 3 | 3 | 4 | 7 | 35 | 3 |
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| Lease Obligation Incurred | 42 | 18 | 33 | 29 | 26 | 18 | 23 | 20 | 14 | 72 | 51 | 108 | 232 | 241 |
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| Fair value of equipment acquired in leases | - | - | - | - | - | - | - | - | 1 | 1 | - | 2 | 0 | - |
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