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FIXED ASSETS (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Fixed Assets |  |  |
Total plant in service | $ 1,841,295 | $ 1,660,964 |
Total property, plant, and equipment | 1,977,978 | 1,748,092 |
Less: Accumulated depreciation | (922,024) | (804,883) |
Net fixed assets | 1,055,954 | 943,209 |
Depreciation and amortization | 135,100 | 102,700 | $ 86,500
Capital expenditure grants | 2,900 | 7,500 |
Capitalized implementation costs | 5,600 | 8,000 |
Amortization of implementation costs | $ 1,900 | 1,200 |
Minimum |  |  |
Fixed Assets |  |  |
Useful Life | 3 years |  |
Maximum |  |  |
Fixed Assets |  |  |
Useful Life | 39 years |  |
Telecommunications equipment and towers |  |  |
Fixed Assets |  |  |
Total plant in service | $ 1,479,633 | 1,309,608 |
Capital leased assets, cost | 26,600 | 30,800 |
Capital leased assets, net | $ 13,700 | $ 18,700 |
Telecommunications equipment and towers | Minimum |  |  |
Fixed Assets |  |  |
Useful Life | 5 years | 5 years |
Telecommunications equipment and towers | Maximum |  |  |
Fixed Assets |  |  |
Useful Life | 15 years | 15 years |
Office and computer equipment |  |  |
Fixed Assets |  |  |
Total plant in service | $ 151,804 | $ 153,371 |
Office and computer equipment | Minimum |  |  |
Fixed Assets |  |  |
Useful Life | 3 years | 3 years |
Office and computer equipment | Maximum |  |  |
Fixed Assets |  |  |
Useful Life | 10 years | 10 years |
Buildings |  |  |
Fixed Assets |  |  |
Total plant in service | $ 136,145 | $ 125,688 |
Buildings | Minimum |  |  |
Fixed Assets |  |  |
Useful Life | 15 years | 15 years |
Buildings | Maximum |  |  |
Fixed Assets |  |  |
Useful Life | 39 years | 39 years |
Transportation vehicles |  |  |
Fixed Assets |  |  |
Total plant in service | $ 27,879 | $ 25,420 |
Transportation vehicles | Minimum |  |  |
Fixed Assets |  |  |
Useful Life | 3 years | 3 years |
Transportation vehicles | Maximum |  |  |
Fixed Assets |  |  |
Useful Life | 10 years | 10 years |
Leasehold improvements |  |  |
Fixed Assets |  |  |
Total plant in service | $ 22,934 | $ 23,783 |
Land |  |  |
Fixed Assets |  |  |
Total plant in service | 11,308 | 10,610 |
Furniture and fixtures |  |  |
Fixed Assets |  |  |
Total plant in service | $ 11,592 | $ 12,484 |
Furniture and fixtures | Minimum |  |  |
Fixed Assets |  |  |
Useful Life | 5 years | 5 years |
Furniture and fixtures | Maximum |  |  |
Fixed Assets |  |  |
Useful Life | 10 years | 10 years |
Construction in progress |  |  |
Fixed Assets |  |  |
Total property, plant, and equipment | $ 136,683 | $ 87,128 |

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