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Earnings per Share (Notes) | 6 Months Ended
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Mar. 31, 2021
Earnings Per Share [Abstract] |
Net Income (Loss) per Share | Earnings per Share The computations of basic and diluted earnings per share are as follows:
| Three Months Ended March 31, |  | Six Months Ended March 31,
| 2021 |  | 2020 |  | 2021 |  | 2020
| (In millions, except share and per share amounts)
Numerator: |  |  |  |  |  |  |
Net income attributable to Forestar Group Inc. | $ | 28.4 |  |  | $ | 9.6 |  |  | $ | 50.4 |  |  | $ | 26.4 |
Denominator: |  |  |  |  |  |  |
Weighted average common shares outstanding — basic | 48,412,213 |  |  | 48,025,359 |  |  | 48,270,718 |  |  | 48,018,246 |
Dilutive effect of stock-based compensation | 97,711 |  |  | 57,592 |  |  | 80,692 |  |  | 56,439 |
Total weighted average shares outstanding — diluted | 48,509,924 |  |  | 48,082,951 |  |  | 48,351,410 |  |  | 48,074,685 |
Basic net income per common share attributable to Forestar Group Inc. | $ | 0.59 |  |  | $ | 0.20 |  |  | $ | 1.04 |  |  | $ | 0.55 |
Diluted net income per common share attributable to Forestar Group Inc. | $ | 0.59 |  |  | $ | 0.20 |  |  | $ | 1.04 |  |  | $ | 0.55 |

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109243012&loc=SL65017193-207537 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3630-109257 + Details
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