Property and equipment- Depreciation and amortization (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2018 |
Sep. 30, 2017 |
Sep. 30, 2018 |
Sep. 30, 2017 |
|
| Depreciation and amortization | ||||
| Total depreciation and amortization of property and equipment | $ 18,901 | $ 18,245 | $ 56,769 | $ 49,244 |
| Network access | ||||
| Depreciation and amortization | ||||
| Total depreciation and amortization of property and equipment | 11,531 | 11,625 | 35,252 | 29,354 |
| Network operations | ||||
| Depreciation and amortization | ||||
| Total depreciation and amortization of property and equipment | 4,447 | 3,987 | 13,017 | 12,273 |
| Development and technology | ||||
| Depreciation and amortization | ||||
| Total depreciation and amortization of property and equipment | 2,664 | 2,375 | 7,740 | 6,840 |
| General and administrative | ||||
| Depreciation and amortization | ||||
| Total depreciation and amortization of property and equipment | $ 259 | $ 258 | $ 760 | $ 777 |