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Earnings Per Share (Tables) | 12 Months Ended
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Dec. 31, 2020
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:
(in thousands, except market price and earnings per share) |  | 2020 |  | 2019 |  | 2018
Net income attributable to the Company |  | $ | 98,589 |  |  | $ | 132,398 |  |  | $ | 82,891 |
Weighted average number of shares: |  |  |  |  |  |
Weighted average number of shares used in calculating basic net income per share |  | 32,329 |  |  | 32,296 |  |  | 32,252 |
Effect of dilutive stock-based compensation plans: |  |  |  |  |  |
Stock options |  | 7 |  |  | 12 |  |  | 15 |
Long-term incentive plan |  | 20 |  |  | 14 |  |  | 28 |
Weighted average number of shares used in calculating diluted net income per share |  | 32,356 |  |  | 32,322 |  |  | 32,295 |
Average market price of common stock used for calculation of dilutive shares |  | $ | 58.56 |  |  | $ | 78.13 |  |  | $ | 66.95 |
Net income per share: |  |  |  |  |  |
Basic |  | $ | 3.05 |  |  | $ | 4.10 |  |  | $ | 2.57 |
Diluted |  | $ | 3.05 |  |  | $ | 4.10 |  |  | $ | 2.57 |

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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=6371337&loc=d3e3550-109257 + Details
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