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Description of the business and summary of significant accounting policies: - Lessor Accounting and Leases (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Cash paid for amounts included in the measurement of lease liabilities |  |  |
Amortization of right-of-use assets | $ 48,370 | $ 64,698 | $ 28,915
Interest expense on finance lease liabilities | 40,352 | 34,940 | 23,317
Operating lease cost | 98,521 | 92,763 | 18,331
Total lease costs | 187,243 | 192,401 | 70,563
Operating cash flows from finance leases | (37,829) | (33,080) | (23,317)
Operating cash flows from operating leases | (102,649) | (93,924) | (18,836)
Financing cash flows from finance leases |  | (77,362) | (45,472)
Right-of-use assets obtained in exchange for new finance lease liabilities | 241,193 | 232,468 | 107,875
Right-of-use assets obtained in exchange for new operating lease liabilities | $ 12,614 | $ 13,682 | $ 11,168
Weighted-average remaining lease term - finance leases (in years) | 17 years 1 month 6 days | 11 years 6 months | 13 years 6 months
Weighted-average remaining lease term - operating leases (in years) | 10 years 10 months 24 days | 12 years 2 months 12 days | 16 years 7 months 6 days
Weighted-average discount rate - finance leases | 8.10% | 7.60% | 8.60%
Weighted-average discount rate - operating leases | 7.80% | 8.10% | 5.40%
Finance leases-fiber lease agreements |  |  |
Initial terms (in years) | 20 years |  |
Additional finance lease future payments due | $ 184,300 |  |
Future minimum payments under these operating lease agreements |  |  |
2024 | 65,584 |  |
2025 | 60,803 |  |
2026 | 57,429 |  |
2027 | 54,957 |  |
2028 | 45,777 |  |
Thereafter | 246,763 |  |
Total minimum lease obligations | 531,313 |  |
Less-amounts representing interest | (172,137) |  |
Present value of minimum lease obligations | 359,176 |  |
Current maturities | (57,172) | $ (67,962) |
Lease obligations, net of current maturities | 302,004 | 330,095 |
Future minimum payments under these finance lease agreements |  |  |
2024 | 63,299 |  |
2025 | 58,328 |  |
2026 | 58,361 |  |
2027 | 57,402 |  |
2028 | 56,357 |  |
Thereafter | 715,349 |  |
Total minimum lease obligations | 1,009,096 |  |
Less-amounts representing interest | (470,710) |  |
Present value of minimum lease obligations | 538,386 |  |
Current maturities | (21,225) | (64,594) |
Lease obligations, net of current maturities | $ 517,161 | $ 419,921 |
Minimum |  |  |
Finance leases-fiber lease agreements |  |  |
Initial terms (in years) | 15 years |  |
Future minimum payments under these operating lease agreements |  |  |
Right to use specified fibers (in years) | 20 years |  |
Maximum |  |  |
Finance leases-fiber lease agreements |  |  |
Initial terms (in years) | 20 years |  |
Future minimum payments under these operating lease agreements |  |  |
Right to use specified fibers (in years) | 25 years |  |

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- Definition Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 5 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479041/842-20-45-5 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (g)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-4 + Details
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- Definition Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 53 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479589/842-20-55-53 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (g)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-4 + Details
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