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Goodwill and Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands | 12 Months Ended | 120 Months Ended
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2026
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Amortization of Intangible Assets | $ 4,312 | $ 4,956 | $ 5,526 |
Gross Carrying Amount | 35,776 | 34,182 |  |
Accumulated Amortization | 20,656 | 16,344 | 11,390 |
Total amortization expense | 15,120 | 17,838 |  |
Finite-lived Intangible Assets Acquired | 133 |  |  |
Subscriber relationships |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross Carrying Amount | 17,912 | 16,888 |  |
Accumulated Amortization | 8,347 | 6,431 |  |
Total amortization expense | 9,565 | 10,457 |  |
Distribution rights |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross Carrying Amount | 4,385 | 4,122 |  |
Accumulated Amortization | 1,450 | 1,180 |  |
Total amortization expense | 2,935 | 2,942 |  |
Internally developed software |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross Carrying Amount | 2,324 | 2,301 |  |
Accumulated Amortization | 2,206 | 1,904 |  |
Total amortization expense | 118 | 397 |  |
Proprietary content |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross Carrying Amount | 8,223 | 7,960 |  |
Accumulated Amortization | 5,908 | 4,431 |  |
Total amortization expense | 2,315 | 3,529 |  |
Intellectual property |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross Carrying Amount | 2,284 | 2,284 |  |
Accumulated Amortization | 2,284 | 2,056 |  |
Total amortization expense | 0 | 228 |  |
Off-Market Favorable Lease |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross Carrying Amount | 648 | 627 |  |
Accumulated Amortization | 461 | 342 |  |
Total amortization expense | 187 | 285 |  |
Cost of service sales [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Amortization of Intangible Assets | 1,477 | 2,068 | 1,978 |
General and Administrative Expense [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Amortization of Intangible Assets | $ 2,835 | $ 2,888 | $ 3,548 |
Acquisition Prior to 2013 [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Finite-Lived Intangible Asset, Useful Life | 7 years |  |  |
Headland Media Limited | Subscriber relationships |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Finite-Lived Intangible Asset, Useful Life | 10 years |  |  |
Headland Media Limited | Distribution rights |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Finite-Lived Intangible Asset, Useful Life | 15 years |  |  |
Headland Media Limited | Internally developed software |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Finite-Lived Intangible Asset, Useful Life | 3 years |  |  |
Headland Media Limited | Proprietary Content [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Finite-Lived Intangible Asset, Useful Life | 2 years |  |  |
Videotel | Subscriber relationships |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Finite-Lived Intangible Asset, Useful Life | 8 years |  |  |
Videotel | Internally developed software |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Finite-Lived Intangible Asset, Useful Life | 4 years |  |  |
Videotel | Off-Market Favorable Lease |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Finite-Lived Intangible Asset, Useful Life | 5 years |  |  |
Videotel | Proprietary Content [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Finite-Lived Intangible Asset, Useful Life | 5 years |  |  |
Q1 2017 Acquisition [Member] | Subscriber relationships |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Finite-Lived Intangible Asset, Useful Life | 10 years |  |  |
Finite-lived Intangible Assets Acquired | $ 100 |  |  |
Business Combination, Contingent Consideration Arrangements, Description | $ 33 |  |  |
Scenario, Forecast [Member] | Maximum | Q1 2017 Acquisition [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Business Combination, Contingent Consideration Arrangements, Description |  |  |  | $ 114

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