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Intangible Assets (Tables) | 9 Months Ended
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Sep. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Intangible Assets, Other than Goodwill | Our intangible assets, other than goodwill, as of September 30, 2017 and December 31, 2016 were as follows (in thousands, except for weighted average remaining useful life):
|  | Weighted |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  | Average |  |  | As of September 30, 2017 |  |  | As of December 31, 2016 |
|  | Remaining |  |  | Gross |  |  |  |  |  | Net |  |  | Gross |  |  |  |  |  | Net |
|  | Useful Life |  |  | Carrying |  |  | Accumulated |  |  | Carrying |  |  | Carrying |  |  | Accumulated |  |  | Carrying |
|  | (in years) |  |  | Amount |  |  | Amortization |  |  | Amount |  |  | Amount |  |  | Amortization |  |  | Amount |
Amortized intangible assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Software |  |  | 2.2 |  |  | $ | 140,818 |  |  | $ | (85,490 | ) |  | $ | 55,328 |  |  | $ | 118,836 |  |  | $ | (70,127 | ) |  | $ | 48,709 |
Service customer relationship |  |  | 2.5 |  |  |  | 8,081 |  |  |  | (5,534 | ) |  |  | 2,547 |  |  |  | 8,081 |  |  |  | (4,773 | ) |  |  | 3,308 |
Other intangible assets |  |  | 1.3 |  |  |  | 1,500 |  |  |  | (997 | ) |  |  | 503 |  |  |  | 1,500 |  |  |  | (682 | ) |  |  | 818 |
OEM and dealer relationships |  |  |  |  |  |  | 6,724 |  |  |  | (6,724 | ) |  |  | — |  |  |  | 6,724 |  |  |  | (6,667 | ) |  |  | 57 |
Total amortized intangible assets |  |  |  |  |  |  | 157,123 |  |  |  | (98,745 | ) |  |  | 58,378 |  |  |  | 135,141 |  |  |  | (82,249 | ) |  |  | 52,892 |
Unamortized intangible assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
FCC Licenses |  |  |  |  |  |  | 32,283 |  |  |  | — |  |  |  | 32,283 |  |  |  | 32,283 |  |  |  | — |  |  |  | 32,283 |
Total intangible assets |  |  |  |  |  | $ | 189,406 |  |  | $ | (98,745 | ) |  | $ | 90,661 |  |  | $ | 167,424 |  |  | $ | (82,249 | ) |  | $ | 85,175 |
Summary of Amortization Expenses | Amortization expense for each of the next five years and thereafter is estimated to be as follows (in thousands):
|  | Amortization |
Years ending December 31, |  | Expense |
2017 (period from October 1 to December 31) |  | $ | 7,137 |
2018 |  | $ | 24,284 |
2019 |  | $ | 14,427 |
2020 |  | $ | 8,382 |
2021 |  | $ | 2,425 |
Thereafter |  | $ | 1,723 |

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- Definition Tabular disclosure of the amount of amortization expense expected to be recorded in succeeding fiscal years for finite-lived intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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