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SEGMENT REPORTING (Details) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 USD ($) | Sep. 30, 2018 USD ($) | Jun. 30, 2018 USD ($) | Mar. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Sep. 30, 2017 USD ($) | Jun. 30, 2017 USD ($) | Mar. 31, 2017 USD ($) | Dec. 31, 2018 USD ($) segment | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($)
Segment reporting |  |  |  |  |  |  |  |  |  |  |
Number of reportable segments | segment |  |  |  |  |  |  |  |  | 3 |  |
Revenue |  |  |  |  |  |  |  |  |  |  |
Revenue | $ 107,806 | $ 121,138 | $ 117,788 | $ 104,475 | $ 107,701 | $ 122,132 | $ 123,245 | $ 128,115 | $ 451,207 | $ 481,193 | $ 457,003
Depreciation and amortization |  |  |  |  |  |  |  |  | 85,719 | 86,934 | 75,980
Non-cash stock-based compensation |  |  |  |  |  |  |  |  | 6,420 | 6,977 | 6,410
Operating income (loss) | 10,318 | $ 30,743 | $ 15,753 | $ 4,209 | 41,314 | $ (19,565) | $ 15,803 | $ 17,756 | 61,023 | 55,308 | 51,270
Segment Assets |  |  |  |  |  |  |  |  |  |  |
Cash, Cash equivalents, and Investments | 192,229 |  |  |  | 215,032 |  |  |  | 192,229 | 215,032 |
Total current assets | 275,765 |  |  |  | 342,928 |  |  |  | 275,765 | 342,928 |
Fixed assets, net | 626,852 |  |  |  | 643,146 |  |  |  | 626,852 | 643,146 |
Goodwill | 63,970 |  |  |  | 63,970 |  |  |  | 63,970 | 63,970 | 62,873
Total assets | 1,107,304 |  |  |  | 1,205,605 |  |  |  | 1,107,304 | 1,205,605 |
Total current liabilities | 140,650 |  |  |  | 161,705 |  |  |  | 140,650 | 161,705 |
Total debt | 90,982 |  |  |  | 155,792 |  |  |  | 90,982 | 155,792 |
Capital Expenditures |  |  |  |  |  |  |  |  |  |  |
Capital expenditures |  |  |  |  |  |  |  |  | 185,921 | 142,371 |
Hurricane rebuild capital expenditures |  |  |  |  |  |  |  |  | 80,152 | 8,585 |
Hurricane insurance proceeds |  |  |  |  |  |  |  |  | 34,606 |  |
Wireless |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 198,824 | 232,501 | 244,404
Wireline |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 230,225 | 227,827 | 190,598
Renewable Energy |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 22,158 | 20,865 | 22,001
Corporate and Other |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  |  |
Depreciation and amortization |  |  |  |  |  |  |  |  | 5,626 | 4,658 | 6,030
Non-cash stock-based compensation |  |  |  |  |  |  |  |  | 6,227 | 6,675 | 6,274
Operating income (loss) |  |  |  |  |  |  |  |  | (34,252) | (33,496) | (34,472)
Segment Assets |  |  |  |  |  |  |  |  |  |  |
Cash, Cash equivalents, and Investments | 78,043 |  |  |  | 76,627 |  |  |  | 78,043 | 76,627 |
Total current assets | 83,107 |  |  |  | 93,497 |  |  |  | 83,107 | 93,497 |
Fixed assets, net | 20,381 |  |  |  | 17,752 |  |  |  | 20,381 | 17,752 |
Total assets | 181,789 |  |  |  | 184,050 |  |  |  | 181,789 | 184,050 |
Total current liabilities | 38,827 |  |  |  | 13,816 |  |  |  | 38,827 | 13,816 |
Capital Expenditures |  |  |  |  |  |  |  |  |  |  |
Capital expenditures |  |  |  |  |  |  |  |  | 8,004 | 6,491 |
U.S. Telecom |  |  |  |  |  |  |  |  |  |  |
Segment Assets |  |  |  |  |  |  |  |  |  |  |
Goodwill | 35,268 |  |  |  | 35,268 |  |  |  | 35,268 | 35,268 | 35,268
U.S. Telecom | Operating segments |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 115,480 | 155,723 | 176,727
Depreciation and amortization |  |  |  |  |  |  |  |  | 24,615 | 25,601 | 24,470
Operating income (loss) |  |  |  |  |  |  |  |  | 36,813 | 55,317 | 49,078
Segment Assets |  |  |  |  |  |  |  |  |  |  |
Cash, Cash equivalents, and Investments | 19,118 |  |  |  | 19,585 |  |  |  | 19,118 | 19,585 |
Total current assets | 36,801 |  |  |  | 40,975 |  |  |  | 36,801 | 40,975 |
Fixed assets, net | 78,102 |  |  |  | 99,462 |  |  |  | 78,102 | 99,462 |
Goodwill | 35,269 |  |  |  | 35,269 |  |  |  | 35,269 | 35,269 |
Total assets | 172,634 |  |  |  | 200,142 |  |  |  | 172,634 | 200,142 |
Total current liabilities | 15,783 |  |  |  | 41,248 |  |  |  | 15,783 | 41,248 |
Capital Expenditures |  |  |  |  |  |  |  |  |  |  |
Capital expenditures |  |  |  |  |  |  |  |  | 13,389 | 22,230 |
U.S. Telecom | Operating segments | Wireless |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 108,878 | 143,028 | 150,044
U.S. Telecom | Operating segments | Wireline |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 6,602 | 12,695 | 26,683
International Telecom |  |  |  |  |  |  |  |  |  |  |
Segment Assets |  |  |  |  |  |  |  |  |  |  |
Goodwill | 25,423 |  |  |  | 25,423 |  |  |  | 25,423 | 25,423 | 24,326
International Telecom | Operating segments |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 313,569 | 304,605 | 258,275
Depreciation and amortization |  |  |  |  |  |  |  |  | 48,889 | 50,007 | 40,493
Non-cash stock-based compensation |  |  |  |  |  |  |  |  | 88 | 188 | 22
Operating income (loss) |  |  |  |  |  |  |  |  | 45,022 | 28,308 | 36,910
Segment Assets |  |  |  |  |  |  |  |  |  |  |
Cash, Cash equivalents, and Investments | 32,390 |  |  |  | 110,700 |  |  |  | 32,390 | 110,700 |
Total current assets | 75,304 |  |  |  | 190,396 |  |  |  | 75,304 | 190,396 |
Fixed assets, net | 482,770 |  |  |  | 367,485 |  |  |  | 482,770 | 367,485 |
Goodwill | 25,421 |  |  |  | 25,421 |  |  |  | 25,421 | 25,421 |
Total assets | 622,454 |  |  |  | 629,007 |  |  |  | 622,454 | 629,007 |
Total current liabilities | 82,575 |  |  |  | 91,887 |  |  |  | 82,575 | 91,887 |
Total debt | 90,970 |  |  |  | 94,577 |  |  |  | 90,970 | 94,577 |
Capital Expenditures |  |  |  |  |  |  |  |  |  |  |
Capital expenditures |  |  |  |  |  |  |  |  | 160,013 | 80,912 |
Hurricane rebuild capital expenditures |  |  |  |  |  |  |  |  | 80,200 |  |
Hurricane insurance proceeds |  |  |  |  |  |  |  |  | 34,600 |  |
International Telecom | Operating segments | Wireless |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 89,946 | 89,473 | 94,360
International Telecom | Operating segments | Wireline |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 223,623 | 215,132 | 163,915
Renewable Energy |  |  |  |  |  |  |  |  |  |  |
Segment Assets |  |  |  |  |  |  |  |  |  |  |
Goodwill | 3,279 |  |  |  | 3,279 |  |  |  | 3,279 | 3,279 | 3,279
Renewable Energy | Operating segments |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 22,158 | 20,865 | 22,001
Depreciation and amortization |  |  |  |  |  |  |  |  | 6,589 | 6,668 | 4,987
Non-cash stock-based compensation |  |  |  |  |  |  |  |  | 105 | 114 | 114
Operating income (loss) |  |  |  |  |  |  |  |  | 13,440 | 5,179 | (246)
Segment Assets |  |  |  |  |  |  |  |  |  |  |
Cash, Cash equivalents, and Investments | 62,678 |  |  |  | 8,120 |  |  |  | 62,678 | 8,120 |
Total current assets | 80,553 |  |  |  | 18,060 |  |  |  | 80,553 | 18,060 |
Fixed assets, net | 45,599 |  |  |  | 158,447 |  |  |  | 45,599 | 158,447 |
Goodwill | 3,280 |  |  |  | 3,280 |  |  |  | 3,280 | 3,280 |
Total assets | 130,427 |  |  |  | 192,406 |  |  |  | 130,427 | 192,406 |
Total current liabilities | 3,465 |  |  |  | 14,754 |  |  |  | 3,465 | 14,754 |
Total debt | $ 12 |  |  |  | $ 61,215 |  |  |  | 12 | 61,215 |
Capital Expenditures |  |  |  |  |  |  |  |  |  |  |
Capital expenditures |  |  |  |  |  |  |  |  | 4,515 | 32,738 |
Renewable Energy | Operating segments | Renewable Energy |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | $ 22,158 | $ 20,865 | $ 22,001

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- Details
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- Details
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