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Note 7 - Earnings Per Common Share (Tables) | 12 Months Ended
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Dec. 31, 2019
Notes Tables |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
(In thousands, except per share amounts) |  | 201 9 |  |  | 2018 |  |  | 2017 |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |
Net income |  | $ | 61,071 |  |  | $ | 55,027 |  |  | $ | 90,284 |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |
Basic earnings per common share - weighted-average shares |  |  | 54,630 |  |  |  | 54,590 |  |  |  | 54,492 |
Effect of dilutive stock options |  |  | 483 |  |  |  | 559 |  |  |  | 358 |
Diluted earnings per common share - weighted-average shares and assumed conversions |  |  | 55,113 |  |  |  | 55,149 |  |  |  | 54,850 |
Basic earnings per common share |  | $ | 1.12 |  |  | $ | 1.01 |  |  | $ | 1.66 |
Diluted earnings per common share |  | $ | 1.11 |  |  | $ | 1.00 |  |  | $ | 1.65 |

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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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