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Basis of Presentation - Reconciliation of Earnings Per Share (Details) $ / shares in Units, shares in Thousands, $ in Thousands |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Nov. 27, 2018 | Sep. 30, 2019 USD ($) $ / shares shares | Sep. 30, 2018 USD ($) $ / shares shares | Sep. 30, 2019 USD ($) $ / shares shares | Sep. 30, 2018 USD ($) $ / shares shares
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |  |  |  |  |
Weighted average basic shares outstanding (in shares) | [1] |  | 13,571 | 13,900 | 13,654 | 13,872
Potentially dilutive common shares related to: |  |  |  |  |  |
Stock options (in shares) |  |  | 141 | 177 | 146 | 158
Unvested restricted stock awards (in shares) |  |  | 23 | 33 | 25 | 32
Weighted average diluted shares outstanding (in shares) | [1] |  | 13,735 | 14,110 | 13,825 | 14,062
Net income | $ |  |  | $ 9,448 | $ 8,680 | $ 25,162 | $ 22,960
Basic EPS (in usd per share) | $ / shares | [1] |  | $ 0.70 | $ 0.63 | $ 1.84 | $ 1.66
Diluted EPS (in usd per share) | $ / shares | [1] |  | $ 0.69 | $ 0.62 | $ 1.82 | $ 1.64
Weighted average anti-dilutive shares not included in the calculation of diluted EPS (in shares) |  |  | 39 | 0 | 34 | 2
Stock split, conversion ratio |  | 2 |  |  |  |
[1] | Share and per share data have been adjusted to reflect the two-for-one stock split effective November 27, 2018.

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