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Earnings Per Share (Tables) | 12 Months Ended
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Dec. 31, 2020
Earnings Per Share [Abstract] |
Computations of Basic and Diluted Net Earnings Per Share | The computations of basic and diluted net earnings per share are as follows (in thousands, except per share data):
Year Ended December 31, |  | 2020 |  |  | 2019 |  |  | 2018 |
Basic net earnings per share: |  |  |  |  |  |  |  |  |  |  |  |
Basic net earnings |  | $ | 721,470 |  |  | $ | 1,271,143 |  |  | $ | 2,360,767 |
Earnings allocated to participating securities |  |  | (4,356 | ) |  |  | (7,035 | ) |  |  | (9,344 | )
Net earnings available to common stockholders |  | $ | 717,114 |  |  | $ | 1,264,108 |  |  | $ | 2,351,423 |
Basic average shares outstanding |  |  | 303,168 |  |  |  | 305,040 |  |  |  | 315,858 |
Basic net earnings per share |  | $ | 2.37 |  |  | $ | 4.14 |  |  | $ | 7.44 |
Diluted net earnings per share: |  |  |  |  |  |  |  |  |  |  |  |
Diluted net earnings |  | $ | 721,470 |  |  | $ | 1,271,143 |  |  | $ | 2,360,767 |
Earnings allocated to participating securities |  |  | (4,359 | ) |  |  | (7,034 | ) |  |  | (9,317 | )
Net earnings available to common stockholders |  | $ | 717,111 |  |  | $ | 1,264,109 |  |  | $ | 2,351,450 |
Diluted average shares outstanding: |  |  |  |  |  |  |  |  |  |  |  |
Basic average shares outstanding |  |  | 303,168 |  |  |  | 305,040 |  |  |  | 315,858 |
Dilutive effect of stock options and other |  |  | 103 |  |  |  | 463 |  |  |  | 875 |
|  |  | 303,271 |  |  |  | 305,503 |  |  |  | 316,733 |
Diluted net earnings per share |  | $ | 2.36 |  |  | $ | 4.14 |  |  | $ | 7.42 |
Anti-dilutive Stock Options | The following stock options were excluded from the computation of diluted net earnings per share because their effect would have been anti-dilutive (shares in thousands):
Year Ended December 31, |  | 2020 |  |  | 2019 |  |  | 2018 |
Anti-dilutive stock options: |  |  |  |  |  |  |  |  |  |  |  |
Weighted-average shares |  |  | 2,972 |  |  | 963 |  |  | 156 |
Weighted-average exercise price |  | $ | 51.87 |  |  | $ | 60.92 |  |  | $ | 65.80 |

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- Definition Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. + 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 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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