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Earnings per Common Share (Tables) | 9 Months Ended
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Sep. 30, 2021
Earnings per common share: |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] | Earnings per common share have been computed based on the following:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| (in thousands, except for per share data)
| 2021 |  | 2020 |  | 2021 |  | 2020
Net income | $ | 32,097 |  |  | $ | 24,786 |  |  | $ | 97,315 |  |  | $ | 45,648 |
Earnings allocated to participating securities |  | (76 | ) |  |  | (133 | ) |  |  | (250 | ) |  |  | (218 | )
Income attributable to common stock | $ | 32,021 |  |  | $ | 24,653 |  |  | $ | 97,065 |  |  | $ | 45,430 |
Weighted average common shares outstanding, including participating securities |  | 39,741 |  |  |  | 39,656 |  |  |  | 39,770 |  |  |  | 39,624 |
Weighted average participating securities |  | (95 | ) |  |  | (119 | ) |  |  | (102 | ) |  |  | (125 | )
Weighted average common shares outstanding |  | 39,646 |  |  |  | 39,537 |  |  |  | 39,668 |  |  |  | 39,499 |
Incremental shares from assumed conversions of options, performance units and non-participating restricted shares |  | 223 |  |  |  | 117 |  |  |  | 220 |  |  |  | 111 |
Weighted average common and equivalent shares outstanding |  | 39,869 |  |  |  | 39,654 |  |  |  | 39,888 |  |  |  | 39,610 |
Earnings per common share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic | $ | 0.81 |  |  | $ | 0.62 |  |  | $ | 2.45 |  |  | $ | 1.15 |
Diluted |  | 0.80 |  |  |  | 0.62 |  |  |  | 2.43 |  |  |  | 1.15 |

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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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