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Description of Business and Summary of Significant Accounting Policies - Cumulative effect adjustment (Details) - USD ($) $ in Thousands | Dec. 30, 2021 | Jan. 01, 2021 | Dec. 31, 2020
--- | --- | --- | ---
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Long-term debt | $ 204,177 |  | $ 193,036
Deferred income taxes | 26,183 |  | 33,429
Capital in excess of par | 145,656 |  | 153,529
Retained earnings | $ 289,306 |  | $ 331,897
ASU 2020-06 | Cumulative effect period of adoption adjustment |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Long-term debt |  | $ 21,393 |
Deferred income taxes |  | (5,584) |
Capital in excess of par |  | (16,511) |
Retained earnings |  | 702 |
ASU 2020-06 | Cumulative effect period of adoption adjusted balance |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Long-term debt |  | 214,429 |
Deferred income taxes |  | 27,845 |
Capital in excess of par |  | 137,018 |
Retained earnings |  | $ 332,599 |

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