Property and equipment- Depreciation and amortization (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
|
| Depreciation and amortization | ||||
| Total depreciation and amortization of property and equipment | $ 13,093 | $ 10,033 | $ 34,801 | $ 27,899 |
| Network access | ||||
| Depreciation and amortization | ||||
| Total depreciation and amortization of property and equipment | 7,227 | 6,277 | 18,689 | 17,264 |
| Network operations | ||||
| Depreciation and amortization | ||||
| Total depreciation and amortization of property and equipment | 3,733 | 2,087 | 10,183 | 5,916 |
| Development and technology | ||||
| Depreciation and amortization | ||||
| Total depreciation and amortization of property and equipment | 1,881 | 1,377 | 5,172 | 3,887 |
| General and administrative | ||||
| Depreciation and amortization | ||||
| Total depreciation and amortization of property and equipment | $ 252 | $ 292 | $ 757 | $ 832 |