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Net Income Per Common Share (Tables) | 6 Months Ended
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Jun. 30, 2020
Earnings Per Share [Abstract] |
Net Income Per Common Share [Table Text Block] | The following table sets forth the computation of basic and diluted net income per common share:
| Three Months Ended June 30 |  |  |  | Six Months Ended June 30 |  |
| 2020 |  | 2019 |  | 2020 |  | 2019
| (thousands, except per-share data) |  |  |  |  |  |
Net income | $ | 33,586 |  |  | $ | 27,718 |  |  | $ | 45,786 |  |  | $ | 39,107 |
Weighted average common shares outstanding during the period (for basic calculation) | 39,312 |  |  | 39,087 |  |  | 39,238 |  |  | 38,986 |
Dilutive effect of other potential common shares | 75 |  |  | 112 |  |  | 143 |  |  | 199 |
Weighted average common shares and potential common shares (for diluted calculation) | 39,387 |  |  | 39,199 |  |  | 39,381 |  |  | 39,185 |
Net income per common share - Basic | $ | 0.85 |  |  | $ | 0.71 |  |  | $ | 1.17 |  |  | $ | 1.00 |
Net income per common share - Diluted | $ | 0.85 |  |  | $ | 0.71 |  |  | $ | 1.16 |  |  | $ | 1.00 |

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- References No definition available. + Details
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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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