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Earnings per Share | 9 Months Ended
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Sep. 30, 2023
Earnings Per Share [Abstract] |
Earnings Per Share | EARNINGS PER SHARE (EPS) Basic EPS is based on the weighted average number of common shares outstanding for the period, excluding any dilutive common share equivalents. Diluted EPS reflects the potential dilution resulting from the vesting of outstanding restricted stock awards, restricted stock units, performance stock units and stock options. The following table shows the computation of basic and diluted EPS for the three and nine month periods ended September 30, 2023 and 2022, respectively:
|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
|  | 2023 |  | 2022 |  | 2023 |  | 2022
Numerator: |  |  |  |  |  |  |  |
Net income (loss) attributable to ACIC common stockholders |  | $ | 10,568 |  |  | $ | (70,884) |  |  | $ | 295,627 |  |  | $ | (173,085) |
Denominator: |  |  |  |  |  |  |  |
Weighted-average shares outstanding |  | 43,301,388 |  |  | 43,075,234 |  |  | 43,220,084 |  |  | 43,035,374 |
Effect of dilutive securities |  | 841,305 |  |  | — |  |  | 668,581 |  |  | — |
Weighted-average diluted shares |  | 44,142,693 |  |  | 43,075,234 |  |  | 43,888,665 |  |  | 43,035,374 |
Earnings available to ACIC common stockholders per share |  |  |  |  |  |  |  |
Basic |  | $ | 0.24 |  |  | $ | (1.65) |  |  | $ | 6.84 |  |  | $ | (4.02) |
Diluted |  | $ | 0.24 |  |  | $ | (1.65) |  |  | $ | 6.73 |  |  | $ | (4.02) |
See Note 17 of these Notes to Unaudited Condensed Consolidated Financial Statements for additional information on the stock grants related to dilutive securities.

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