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Note 11 - Earnings Per Share (Tables) | 12 Months Ended
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Dec. 30, 2017
Notes Tables |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
(in thousands, except per share amounts ) |  | 201 7 |  |  | 201 6 |  |  | 201 5 |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |
Net income as reported |  | $ | 119,519 |  |  | $ | 104,488 |  |  | $ | 80,866 |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |
Weighted average shares outstanding |  |  |  |  |  |  |  |  |  |  |  |
Basic |  |  | 22,687 |  |  |  | 22,559 |  |  |  | 22,565 |
Effect of dilutive securities |  |  | 244 |  |  |  | 168 |  |  |  | 154 |
Diluted |  |  | 22,931 |  |  |  | 22,727 |  |  |  | 22,719 |
Earnings Per Share: |  |  |  |  |  |  |  |  |  |  |  |
Basic earnings per share |  | $ | 5.27 |  |  | $ | 4.63 |  |  | $ | 3.58 |
Diluted earnings per share |  | $ | 5.21 |  |  | $ | 4.60 |  |  | $ | 3.56 |

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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/2003/role/presentationRef -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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