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Shareholders' Equity (Narrative) (Details) - USD ($) $ / shares in Units, shares in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Oct. 01, 2021 | Jul. 02, 2021 | Apr. 02, 2021 | Sep. 25, 2020 | Jun. 26, 2020 | Mar. 27, 2020 | Oct. 01, 2021 | Sep. 25, 2020 | Jan. 01, 2021
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |  |  |
Total cost | $ 2,103,000 | $ 8,603,000 | $ 2,110,000 | $ 932,000 |  | $ 1,006,000 |  |  |
Amount available under repurchase plan | 11,500,000 |  |  |  |  |  | $ 11,500,000 |  |
Stock repurchase authorized | $ 167,200,000 |  |  |  |  |  | $ 167,200,000 |  |
Shares repurchased for employee net vesting obligations, shares | 8 |  |  | 8 |  |  | 118 | 135 |
Shares repurchased for employee net vesting obligations, value | $ 155,000 |  |  | $ 111,000 |  |  | $ 1,800,000 | $ 2,100,000 |
Dividend declared |  |  | $ 0.40 |  |  |  |  |  |
Dividend payment | $ 3,192,000 | $ 3,227,000 | $ 3,254,000 | $ 3,024,000 | $ 3,050,000 | $ 13,000 |  |  |
Dividends payable, date declared, year | 2021 |  |  |  |  |  | 2021 |  |
Dividends payable, date to be paid, year and month | 2021-12 |  |  |  |  |  | 2021-12 |  |
Minimum [Member] |  |  |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |  |  |
Dividend declared |  |  |  |  |  |  |  |  | $ 0.36
Maximum [Member] |  |  |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |  |  |
Dividend declared |  |  |  |  |  |  |  |  | $ 0.38
Share Repurchase Plan [Member] |  |  |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |  |  |
Repurchase of common stock | 113 |  |  | 75 |  |  | 738 | 148 |
Purchase price per share | $ 18.68 |  |  | $ 12.41 |  |  | $ 17.35 | $ 13.09 |
Total cost | $ 2,100,000 |  |  | $ 900,000 |  |  | $ 12,800,000 | $ 1,900,000 |
Stock Appreciation Rights ("SARs") [Member] |  |  |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |  |  |
SARs outstanding | 2,900 |  |  |  |  |  | 2,900 |  |
Exercise price | $ 4.00 |  |  |  |  |  | $ 4.00 |  |
Expiration date |  |  |  |  |  |  | Feb. 08, 2022 |  |

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