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Earnings Per Share | 9 Months Ended
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Sep. 30, 2020
Earnings Per Share [Abstract] |
Earnings Per Share | Earnings Per Share The amounts used in computing earnings per share and the weighted average number of shares of potentially dilutive securities are as follows:
| Three months ended September 30, | Nine months ended September 30,
(in thousands, except market price and earnings per share) | 2020 | 2019 | 2020 | 2019
Net income attributable to the Company | $ | 29,589 |  | $ | 40,009 |  | $ | 71,052 |  | $ | 103,253 |
Weighted average number of shares: |  |  |  |
Weighted average number of shares used in calculating basic net income per share | 32,337 |  | 32,306 |  | 32,326 |  | 32,293 |
Effect of dilutive stock-based compensation plans: |  |  |  |
Stock options | 7 |  | 11 |  | 7 |  | 12 |
Weighted average number of shares used in calculating diluted net income per share | 32,344 |  | 32,317 |  | 32,333 |  | 32,305 |
Average market price of common stock used for calculation of dilutive shares | $ | 51.81 |  | $ | 82.99 |  | $ | 57.05 |  | $ | 76.45 |
Net income attributable to the Company per share: |  |  |  |
Basic | $ | 0.92 |  | $ | 1.24 |  | $ | 2.20 |  | $ | 3.20 |
Diluted | $ | 0.91 |  | $ | 1.24 |  | $ | 2.20 |  | $ | 3.20 |

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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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