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Stockholders' Equity (Detail) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 28, 2018 | Sep. 28, 2018 | Jun. 29, 2018 | Mar. 30, 2018 | Dec. 29, 2017 | Sep. 29, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 28, 2018 | Dec. 29, 2017
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Dividends Per Share | $ 0.13 | $ 0.13 | $ 0.13 | $ 0.13 | $ 0.105 | $ 0.105 | $ 0.105 | $ 0.105 |  |
Amount | $ 6,723 | $ 6,765 | $ 6,764 | $ 6,700 | $ 5,416 | $ 5,424 | $ 5,424 | $ 5,374 | $ 26,952 | $ 21,638

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