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Earnings per Common Share - Additional Information (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 9 Months Ended
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Sep. 28, 2018 | Sep. 29, 2017
Computation Of Earnings Per Share [Line Items] |  |
Repurchase of common stock | $ 3,765 | $ 370
Common Stock Repurchase Plan |  |
Computation Of Earnings Per Share [Line Items] |  |
Shares repurchased | 57 |
Shares repurchased, average cost per share | $ 66.16 |

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