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Stock-Based Compensation and Other Stock Plans - Other Stock Plans Narrative (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 28, 2019 | Dec. 29, 2018 | Dec. 30, 2017
Directors' Fee Plan |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |  |  |
Percentage of non-employee directors fee | 100.00% |  |
Number of shares issued (in shares) | 1,784 | 1,727 | 1,800
Deferred shares received (in shares) | 1,374 | 1,315 | 1,312
Number of shares reserved for issuance (in shares) | 184,146 |  |
Non-employee Directors | Restricted Stock |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |  |  |
Shares granted (in shares) | 7,605 | 6,975 | 6,966
Vesting period | 1 year |  |
Employees Stock Purchase Plan |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |  |  |
Number of shares issued (in shares) | 25,820 | 22,794 | 26,963
Number of shares reserved for issuance (in shares) | 704,986 |  |
Employee contributions for purchase of common stock | $ 2.2 |  |
Stock based compensation expense (benefit) | $ 0.1 | $ 0.3 | $ 0.1
Franchisee Stock Purchase Plan |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |  |  |
Number of shares issued (in shares) | 49,921 | 46,704 | 47,314
Number of shares reserved for issuance (in shares) | 469,530 |  |
Stock based compensation expense (benefit) | $ 0.8 | $ 0.6 | $ 0.2
Franchisee contributions for purchase of common stock | $ 4.9 |  |

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