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Software Development Cost | 12 Months Ended
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Dec. 31, 2018
Tradeweb Markets LLC |
Entity Information [Line Items] |
Software Development Cost | 8. Software Development Cost The components of Software development costs, net of accumulated amortization are as follows (in thousands):
|  | Successor |  |  | Predecessor
|  | December 31, |  |  | December 31,
|  | 2018 |  |  | 2017
Software development costs |  | $ | 175,656 |  |  | $ | 218,382
Accumulated amortization |  |  | (5,074) |  |  |  | (177,201)
Software development costs, net of accumulated amortization |  | $ | 170,582 |  |  | $ | 41,181
For October 1, 2018 to December 31, 2018, January 1, 2018 to September 30, 2018 and for the years ended December 31, 2017 and 2016, software development costs totaling $7,156,000, $19,523,000, $27,157,000 and $25,351,000, respectively, were capitalized. In addition, on October 1, 2018, a fair value of $168,500,000 was assigned to software development costs of the Company as a result of the Refinitiv Transaction. Non-capitalized software costs and routine maintenance costs are expensed as incurred and are included in employee compensation and benefits and professional fees on the consolidated statements of income. For October 1, 2018 to December 31, 2018, January 1, 2018 to September 30, 2018 and for the years ended December 31, 2017 and 2016, amortization expense related to these assets was $5,074,000, $19,962,000, $25,420,000 and $26,824,000 respectively.

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- Definition The entire disclosure for research, development, and computer software activities, including contracts and arrangements to be performed for others and with federal government. Includes costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility and in-process research and development acquired in a business combination consummated during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 985 -SubTopic 730 -URI http://asc.fasb.org/subtopic&trid=2197926 + Details
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