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Earnings Per Share (Tables) | 6 Months Ended
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Jun. 30, 2021
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted | 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 June 30, | Six months ended June 30,
(in thousands, except market price and earnings per share) | 2021 | 2020 | 2021 | 2020
Net income attributable to the Company | $ | 31,397 |  | $ | 32,354 |  | $ | 58,980 |  | $ | 41,463 |
Weighted average number of shares: |  |  |  |
Weighted average number of shares used in calculating basic net income per share | 32,375 |  | 32,328 |  | 32,363 |  | 32,320 |
Effect of dilutive stock-based compensation plans | 47 |  | 8 |  | 48 |  | 8 |
Weighted average number of shares used in calculating diluted net income per share | 32,422 |  | 32,336 |  | 32,411 |  | 32,328 |
Average market price of common stock used for calculation of dilutive shares | $ | 87.53 |  | $ | 54.08 |  | $ | 83.48 |  | $ | 59.73 |
Net income attributable to the Company per share: |  |  |  |
Basic | $ | 0.97 |  | $ | 1.00 |  | $ | 1.82 |  | $ | 1.28 |
Diluted | $ | 0.97 |  | $ | 1.00 |  | $ | 1.82 |  | $ | 1.28 |

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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://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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