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Summary of Significant Accounting Policies - Intangible Assets (Details) £ in Thousands, $ in Thousands | 12 Months Ended | 18 Months Ended | 20 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Dec. 31, 2015 USD ($) | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($) | Jul. 02, 2014 USD ($) | Jul. 31, 2013 USD ($) | May. 11, 2013 USD ($) | May. 11, 2013 GBP (£)
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Service revenue since acquisition |  | $ 33,600 | $ 38,200 |  |  |  |
Intellectual property |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Estimated Useful Life | 7 years |  |  |  |  |  |
Headland Media Limited |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Business Combination, Contingent Consideration, Liability |  |  |  |  | $ 169 | $ 24,169 | £ 15,576
Service revenue since acquisition | $ 15,000 |  |  |  |  |  |
Headland Media Limited | Subscriber relationships |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Estimated Useful Life | 10 years |  |  |  |  |  |
Headland Media Limited | Distribution rights |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Estimated Useful Life | 15 years |  |  |  |  |  |
Headland Media Limited | Internally developed software |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Estimated Useful Life | 3 years |  |  |  |  |  |
Headland Media Limited | Proprietary Content |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Estimated Useful Life | 2 years |  |  |  |  |  |
Videotel |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Business Combination, Contingent Consideration, Liability |  |  |  | $ 47,446 |  |  |
Service revenue since acquisition | $ 23,200 |  |  |  |  |  |
Videotel | Subscriber relationships |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Estimated Useful Life | 8 years |  |  |  |  |  |
Videotel | Internally developed software |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Estimated Useful Life | 4 years |  |  |  |  |  |
Videotel | Proprietary Content |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Estimated Useful Life | 5 years |  |  |  |  |  |
Videotel | Off-Market Favorable Lease |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Estimated Useful Life | 5 years |  |  |  |  |  |

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