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Net Income Per Share (Tables) | 9 Months Ended
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Sep. 30, 2020
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] | The following table presents the calculation of net earnings per common share (“EPS”) — basic and diluted (in thousands, except per share data):
| Three months ended September 30, |  | Nine months ended September 30,
| 2020 |  | 2019 |  | 2020 |  | 2019
Net income | $ | 24,986 |  |  | $ | 26,563 |  |  | $ | 60,728 |  |  | $ | 80,394 |
Weighted-average number of common shares outstanding (for basic calculation) | 20,948 |  |  | 20,666 |  |  | 20,870 |  |  | 20,607 |
Dilutive securities | 608 |  |  | 821 |  |  | 691 |  |  | 949 |
Weighted-average common and common equivalent shares outstanding (for diluted calculation) | 21,556 |  |  | 21,487 |  |  | 21,561 |  |  | 21,556 |
EPS — basic | $ | 1.19 |  |  | $ | 1.29 |  |  | $ | 2.91 |  |  | $ | 3.90 |
EPS — diluted | $ | 1.16 |  |  | $ | 1.24 |  |  | $ | 2.82 |  |  | $ | 3.73 |

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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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