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Net Income per Share (Tables) | 9 Months Ended
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Dec. 23, 2022
Earnings Per Share [Abstract] |
Schedule of Computation of Net (Loss) Income per Share and Unaudited Pro Forma Net Income per Share | The following table sets forth the basic and diluted net income attributable to Allegro MicroSystems, Inc. per share.
| Three-Month Period Ended |  | Nine-Month Period Ended
| December 23, 2022 |  | December 24, 2021 |  | December 23, 2022 |  | December 24, 2021
Net income attributable to Allegro MicroSystems, Inc. | $ | 64,519 |  |  | $ | 32,936 |  |  | $ | 125,380 |  |  | $ | 93,791 |
Net income attributable to common stockholders | 64,551 |  |  | 32,973 |  |  | 125,482 |  |  | 93,903 |
Basic weighted average shares of common stock | 191,328,538 |  |  | 189,736,901 |  |  | 191,082,141 |  |  | 189,665,324 |
Dilutive effect of common stock equivalents | 2,607,370 |  |  | 2,331,321 |  |  | 2,018,621 |  |  | 2,013,627 |
Diluted weighted average shares of common stock | 193,935,908 |  |  | 192,068,222 |  |  | 193,100,762 |  |  | 191,678,951 |
Basic net income attributable to Allegro MicroSystems, Inc. per share | $ | 0.34 |  |  | $ | 0.17 |  |  | $ | 0.66 |  |  | $ | 0.49 |
Basic net income attributable to common stockholders per share | $ | 0.34 |  |  | $ | 0.17 |  |  | $ | 0.66 |  |  | $ | 0.50 |
Diluted net income attributable to Allegro MicroSystems, Inc. per share | $ | 0.33 |  |  | $ | 0.17 |  |  | $ | 0.65 |  |  | $ | 0.49 |
Diluted net income attributable to common stockholders per share | $ | 0.33 |  |  | $ | 0.17 |  |  | $ | 0.65 |  |  | $ | 0.49 |
Schedule Of Anti Dilutive Securities Excluded | The following table represents the securities excluded as conversion of such securities would have an antidilutive effect on income per share:
| Three-Month Period Ended |  | Nine-Month Period Ended
| December 23, 2022 |  | December 24, 2021 |  | December 23, 2022 |  | December 24, 2021
Restricted stock units | 12,620 |  |  | — |  |  | 24,273 |  |  | — |
Schedule of Issuable Weighted Average Share Information | The following table represents issuable weighted average share information underlying our outstanding RSUs, PSUs (as defined in Note 16 below) and participation in our employee stock purchase plan for the respective periods:
| Three-Month Period Ended |  | Nine-Month Period Ended
| December 23, 2022 |  | December 24, 2021 |  | December 23, 2022 |  | December 24, 2021
Restricted stock units | 973,417 |  |  | 1,199,816 |  |  | 752,637 |  |  | 1,046,229 |
Performance stock units | 1,612,824 |  |  | 1,117,532 |  |  | 1,244,855 |  |  | 959,084 |
Employee stock purchase plan | 21,129 |  |  | 13,973 |  |  | 21,129 |  |  | 8,314 |
Total | 2,607,370 |  |  | 2,331,321 |  |  | 2,018,621 |  |  | 2,013,627 |

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- Definition Tabular disclosure of the weighted average number of shares used in calculating basic net earnings per share (or unit) and diluted earnings per share (or unit). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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