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Loss Per Share (Tables) | 9 Months Ended
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Sep. 30, 2022
Earnings Per Share [Abstract] |
Summary of Calculation of Basic and Diluted Loss Per Share | The calculation of basic and diluted loss per share is as follows:
|  | Three Months Ended |  |  | Nine Months Ended |
|  | September 30, |  |  | September 30, |
(In thousands, except per share amounts) |  | 2022 |  |  | 2021 |  |  | 2022 |  |  | 2021 |
Numerator |  |  |  |  |  |  |  |  |  |  |  |
Net loss attributable to ADTRAN Holdings, Inc. |  | $ | (41,934 | ) |  | $ | (10,427 | ) |  | $ | (40,918 | ) |  | $ | (4,445 | )
Denominator |  |  |  |  |  |  |  |  |  |  |  |
Weighted average number of shares – basic |  |  | 73,036 |  |  |  | 48,609 |  |  |  | 57,175 |  |  |  | 48,470 |
Effect of dilutive securities |  |  |  |  |  |  |  |  |  |  |  |
Stock options |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
PSUs, RSUs and restricted stock |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Weighted average number of shares – diluted |  |  | 73,036 |  |  |  | 48,609 |  |  |  | 57,175 |  |  |  | 48,470 |
Loss per share attributable to ADTRAN Holdings, Inc. – basic |  | $ | (0.57 | ) |  | $ | (0.21 | ) |  | $ | (0.72 | ) |  | $ | (0.09 | )
Loss per share attributable to ADTRAN Holdings, Inc. – diluted |  | $ | (0.57 | ) |  | $ | (0.21 | ) |  | $ | (0.72 | ) |  | $ | (0.09 | )

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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 -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482662/260-10-50-1 + Details
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