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Net Income Per Share | 12 Months Ended
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Dec. 31, 2018
Tradeweb Markets LLC |
Entity Information [Line Items] |
Net Income Per Share | 18. Net Income Per Share On April 4, 2019, the LLC Agreement was amended and restated to, among other things, (i) provide for LLC Interests and (ii) exchange all of the existing membership interests of the Company’s existing equityholders for LLC Interests. For purposes of calculating net income per share on the consolidated statements of income, the number of outstanding shares has been adjusted retroactively for all periods presented to reflect the above-mentioned amendment and resulting Recapitalization. The following table sets forth the computation of basic and diluted net income per share:
|  | Successor |  |  | Predecessor |  | Predecessor |  |  | Predecessor
|  | October 1, |  |  | January 1, |  | Year |  |  | Year
|  | 2018 to |  |  | 2018 to |  | Ended |  |  | Ended
|  | December 31, 2018 |  |  | September 30, 2018 |  | December 31, 2017 |  |  | December 31, 2016
Net Income (in thousands) |  | $ | 29,307 |  |  | $ | 130,160 |  | $ | 83,648 |  |  | $ | 93,161
Basic Weighted Average Shares Outstanding |  |  | 222,221,628 |  |  |  | 215,365,920 |  |  | 212,568,635 |  |  |  | 210,979,704
Dilutive Effect of Conversion to Equity Settled PRSU |  |  | 22,223 |  |  |  | — |  |  | — |  |  |  | —
Diluted Weighted Average Shares Outstanding |  |  | 222,243,851 |  |  |  | 215,365,920 |  |  | 212,568,635 |  |  |  | 210,979,704
Basic Net Income Per Share |  | $ | 0.13 |  |  | $ | 0.60 |  | $ | 0.39 |  |  | $ | 0.44
Diluted Net Income Per Share |  | $ | 0.13 |  |  | $ | 0.60 |  | $ | 0.39 |  |  | $ | 0.44
Shares from the convertible term note payable totaling 894,464 and 2,548,668 for the years ended December 31, 2017 and 2016, respectively, and shares from the contingent consideration payable totaling 5,444,566 for January 1, 2018 to September 30, 2018 were excluded from the computation of diluted net income per share because their effect would have been anti-dilutive. Net income per share are the same for all classes of the Company’s shares since each class of share equally participates in the earnings of the Company.

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition The entire disclosure for earnings per share. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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