Property and equipment- Depreciation and amortization (Details) - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
Mar. 31, 2018 |
Mar. 31, 2017 |
|
| Depreciation and amortization | ||
| Total depreciation and amortization of property and equipment | $ 20,606 | $ 14,985 |
| Network access | ||
| Depreciation and amortization | ||
| Total depreciation and amortization of property and equipment | 13,587 | 8,375 |
| Network operations | ||
| Depreciation and amortization | ||
| Total depreciation and amortization of property and equipment | 4,256 | 4,155 |
| Development and technology | ||
| Depreciation and amortization | ||
| Total depreciation and amortization of property and equipment | 2,508 | 2,195 |
| General and administrative | ||
| Depreciation and amortization | ||
| Total depreciation and amortization of property and equipment | $ 255 | $ 260 |