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Earnings Per Share | 9 Months Ended
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Sep. 30, 2023
Earnings Per Share [Abstract] |
Earnings Per Share | 4. Earnings Per Share The following table sets forth the computation of basic and diluted earnings per share for the three and nine months ended September 30, 2023 and 2022 (in thousands, except per share amounts):
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2023 |  |  | 2022 |  |  | 2023 |  |  | 2022 |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |
Net (loss) income attributable to Acadia Healthcare Company, Inc. |  | $ | (217,710 | ) |  | $ | 71,099 |  |  | $ | (79,396 | ) |  | $ | 212,015 |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |
Weighted average shares outstanding for basic earnings per share |  |  | 91,168 |  |  |  | 89,833 |  |  |  | 90,852 |  |  |  | 89,607 |
Effects of dilutive instruments |  |  | — |  |  |  | 1,890 |  |  |  | — |  |  |  | 2,061 |
Shares used in computing diluted earnings per common share |  |  | 91,168 |  |  |  | 91,723 |  |  |  | 90,852 |  |  |  | 91,668 |
(Loss) earnings per share attributable to Acadia Healthcare Company, Inc. stockholders: |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | (2.39 | ) |  | $ | 0.79 |  |  | $ | (0.87 | ) |  | $ | 2.37 |
Diluted |  | $ | (2.39 | ) |  | $ | 0.78 |  |  | $ | (0.87 | ) |  | $ | 2.31 |
For the three and nine months ended September 30, 2023, approximately 0.5 million and 0.8 million, respectively, outstanding shares of restricted stock and shares of common stock issuable upon exercise of outstanding stock option awards have been included in the calculation of weighted-average shares outstanding-diluted. These shares are excluded from the calculation of diluted earnings per share in the condensed consolidated statement of operations because the net loss for both the three and nine months ended September 30, 2023 causes such securities to be anti-dilutive. Approximately 0.4 million shares of common stock issuable upon exercise of outstanding stock option awards were excluded from the calculation of diluted earnings per share for both the three and nine months ended September 30, 2023, respectively, because their effect would have been anti-dilutive. Approximately 0.1 million and 0.6 million shares of common stock issuable upon exercise of outstanding stock option awards were excluded from the calculation of diluted earnings per share for the three and nine months ended September 30, 2022, respectively, because their effect would have been anti-dilutive.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482662/260-10-50-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 260 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//260/tableOfContent Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482662/260-10-50-2 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482662/260-10-50-3 + Details
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