Property and equipment- Depreciation and amortization (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2018 |
Jun. 30, 2017 |
Jun. 30, 2018 |
Jun. 30, 2017 |
|
| Depreciation and amortization | ||||
| Total depreciation and amortization of property and equipment | $ 17,262 | $ 16,014 | $ 37,868 | $ 30,999 |
| Network access | ||||
| Depreciation and amortization | ||||
| Total depreciation and amortization of property and equipment | 10,134 | 9,354 | 23,721 | 17,729 |
| Network operations | ||||
| Depreciation and amortization | ||||
| Total depreciation and amortization of property and equipment | 4,314 | 4,131 | 8,570 | 8,286 |
| Development and technology | ||||
| Depreciation and amortization | ||||
| Total depreciation and amortization of property and equipment | 2,568 | 2,270 | 5,076 | 4,465 |
| General and administrative | ||||
| Depreciation and amortization | ||||
| Total depreciation and amortization of property and equipment | $ 246 | $ 259 | $ 501 | $ 519 |