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Earnings per Share (Notes) | 6 Months Ended
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Jun. 30, 2018
Earnings Per Share [Abstract] |
Earnings Per Share [Text Block] | Earnings per Share Basic earnings per share is computed by dividing income available to common stockholders by the weighted average number of common shares outstanding for the reporting period. Diluted earnings per share reflects the potential dilution that could occur if securities or other contracts to issue common stock were exercised or converted into common stock. For the calculation of diluted earnings per share, the basic weighted average number of shares is increased by the dilutive effect of stock options and restricted stock units, determined using the treasury stock method. Basic weighted average shares outstanding is reconciled to diluted weighted average shares outstanding as follows (in thousands):
| Thirteen Weeks Ended |  | Twenty-Six Weeks Ended
| June 30, 2018 |  | July 1, 2017 |  | June 30, 2018 |  | July 1, 2017
Basic weighted average shares outstanding | 29,230 |  |  | 29,032 |  |  | 29,173 |  |  | 28,964 |
Dilutive shares | 298 |  |  | 362 |  |  | 336 |  |  | 397 |
Diluted weighted average shares outstanding | 29,528 |  |  | 29,394 |  |  | 29,509 |  |  | 29,361 |
For the thirteen weeks ended June 30, 2018 and July 1, 2017, respectively, approximately 2,000 and 3,000 equity awards were excluded from the dilutive earnings per share calculation because the effect would have been anti-dilutive. For the twenty-six weeks ended June 30, 2018 and July 1, 2017, respectively, approximately 13,000 and 20,000 equity awards were excluded from the dilutive earnings per share calculation because the effect would have been anti-dilutive.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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