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Intangible Assets and Goodwill (Tables) - Tradeweb Markets LLC | 12 Months Ended
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Dec. 31, 2018
Entity Information [Line Items] |
Summary of goodwill | The following is a summary of goodwill (in thousands):
|  | Successor |  |  | Predecessor
|  | December 31, |  |  | December 31,
|  | 2018 |  |  | 2017
Refinitiv Transaction |  | $ | 2,694,797 |  |  | $ | —
TR Acquisition |  |  | — |  |  |  | 334,185
Merger |  |  | — |  |  |  | 66,484
RaffCap Business |  |  | — |  |  |  | 49,200
BondDesk |  |  | — |  |  |  | 103,158
Other |  |  | — |  |  |  | 10,394
Total |  | $ | 2,694,797 |  |  | $ | 563,421
Summary of intangible assets which have an indefinite useful life | The following is a summary of intangible assets which have an indefinite useful life (in thousands):
|  | Successor |  |  | Predecessor
|  | December 31, |  |  | December 31,
|  | 2018 |  |  | 2017
Licences |  | $ | 168,800 |  |  | $ | 12,000
Tradename |  |  | 154,300 |  |  |  | —
Total |  | $ | 323,100 |  |  | $ | 12,000
Intangible assets that are subject to amortization | Intangible assets that are subject to amortization, including the related accumulated amortization, are comprised as follows (in thousands):
|  |  |  | Successor |  |  | Predecessor
|  |  |  | December 31, 2018 |  |  | December 31, 2017
|  | Amortization |  |  |  |  | Accumulated |  | Net Carrying |  |  |  |  |  | Accumulated |  | Net Carrying
|  | Period |  | Cost |  | Amortization |  | Amount |  |  | Cost |  | Amortization |  | Amount
Customer relationships - Refinitiv Transaction |  | 12 Years |  | $ | 928,200 |  | $ | (19,338) |  | $ | 908,862 |  |  | $ | — |  | $ | — |  | $ | —
Content and data |  | 7 Years |  |  | 154,400 |  |  | (5,514) |  |  | 148,886 |  |  |  | — |  |  | — |  |  | —
Customer relationships - Fixed Income Business |  | 13 Years |  |  | — |  |  | — |  |  | — |  |  |  | 155,284 |  |  | (155,270) |  |  | 14
Customer relationships - DW |  | 11 Years |  |  | — |  |  | — |  |  | — |  |  |  | 65,000 |  |  | (42,348) |  |  | 22,652
Customer relationships - RaffCap |  | 12 Years |  |  | — |  |  | — |  |  | — |  |  |  | 17,600 |  |  | (9,166) |  |  | 8,434
Customer relationships - BondDesk |  | 15 Years |  |  | — |  |  | — |  |  | — |  |  |  | 104,000 |  |  | (28,806) |  |  | 75,194
Customer relationships - Other |  | 10 Years |  |  | — |  |  | — |  |  | — |  |  |  | 2,100 |  |  | (385) |  |  | 1,715
Tradenames |  | 10 Years |  |  | — |  |  | — |  |  | — |  |  |  | 200 |  |  | (125) |  |  | 75
Liquidity contracts |  | 16 Years |  |  | — |  |  | — |  |  | — |  |  |  | 185,000 |  |  | (82,865) |  |  | 102,135
|  |  |  | $ | 1,082,600 |  | $ | (24,852) |  | $ | 1,057,748 |  |  | $ | 529,184 |  | $ | (318,965) |  | $ | 210,219
Estimated annual future amortization for existing intangible assets | The estimated annual future amortization for existing intangibles assets through December 31, 2023 is as follows (in thousands):
Year |  | Amount
2019 |  | $ | 99,408
2020 |  |  | 99,408
2021 |  |  | 99,408
2022 |  |  | 99,408
2023 |  |  | 99,408

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