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Earnings per share (Tables) | 3 Months Ended
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Mar. 31, 2023
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share | Earnings per share have been calculated as follows:
(Expressed in thousands, except number of shares and per share amounts) |  |  |  |  |  |
|  |  | For the Three Months Ended March 31,
|  |  |  |  | 2023 |  | 2022
Basic weighted average number of shares outstanding |  |  |  |  | 11,092,603 |  |  | 12,467,632 |
Net dilutive effect of share-based awards, treasury stock method (1) |  |  |  |  | 870,889 |  |  | 1,031,702 |
Diluted weighted average number of shares outstanding |  |  |  |  | 11,963,492 |  |  | 13,499,334 |
Net income attributable to Oppenheimer Holdings Inc. |  |  |  |  | $ | 14,617 |  |  | $ | 9,292 |
Earnings per share attributable to Oppenheimer Holdings Inc. |  |  |  |  |  |
Basic |  |  |  |  | $ | 1.32 |  |  | $ | 0.75 |
Diluted |  |  |  |  | $ | 1.22 |  |  | $ | 0.69 |
(1) For the three months ended March 31, 2023, the diluted net income per share computation did not include the anti-dilutive effect of 282,360 shares of Class A Stock granted under share-based compensation arrangements. For the three months ended March 31, 2022, there was no Class A Stock granted under share-based compensation arrangements that was anti-dilutive.

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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