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FIXED ASSETS (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Fixed Assets |  |  |
Total plant in service | $ 1,036,370 | $ 766,144 |
Total property, plant, and equipment | 1,138,362 | 807,247 |
Less: Accumulated depreciation | (490,650) | (433,744) |
Net fixed assets | 647,712 | 373,503 |
Depreciation and amortization | 73,300 | 55,900 | $ 50,300
Gain on disposition of long-lived assets | (27) | 2,823 |
Capital expenditures offset by grants | $ 2,300 | 2,600 | $ 2,300
U.S. Telecom |  |  |
Fixed Assets |  |  |
Gain on disposition of long-lived assets |  | 2,800 |
Minimum |  |  |
Fixed Assets |  |  |
Useful Life | 3 years |  |
Maximum |  |  |
Fixed Assets |  |  |
Useful Life | 39 years |  |
Telecommunications equipment and towers |  |  |
Fixed Assets |  |  |
Total plant in service | $ 802,415 | 553,237 |
Capital leased assets, cost | 13,800 | 2,700 |
Capital leased assets, net | $ 12,400 | $ 1,800 |
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 |
Solar assets |  |  |
Fixed Assets |  |  |
Total plant in service | $ 115,932 | $ 111,446 |
Solar assets | Minimum |  |  |
Fixed Assets |  |  |
Useful Life | 20 years | 20 years |
Solar assets | Maximum |  |  |
Fixed Assets |  |  |
Useful Life | 23 years | 23 years |
Office and computer equipment |  |  |
Fixed Assets |  |  |
Total plant in service | $ 44,147 | $ 54,665 |
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 | $ 43,609 | $ 18,540 |
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 | $ 12,043 | $ 8,882 |
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 | $ 325 | $ 11,592 |
Land |  |  |
Fixed Assets |  |  |
Total plant in service | 10,242 | 1,198 |
Furniture and fixtures |  |  |
Fixed Assets |  |  |
Total plant in service | $ 7,657 | $ 6,584 |
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 | $ 101,992 | $ 41,103 |
Assets Held under Capital Leases [Member] |  |  |
Fixed Assets |  |  |
Capital Leased Assets, Remaining amount due | $ 1,200 | $ 0 |

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