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Adoption of ASU 2014-09, "Revenue from Contracts with Customers" - Cumulative Effect Adjustments (Details) - USD ($) $ in Thousands |  | 3 Months Ended
--- | --- | ---
Jan. 01, 2018 | Apr. 01, 2018 | Mar. 26, 2017
Retained Earnings Adjustments [Line Items] |  |  |
Total revenues |  | $ 427,369 | $ 449,266
Income (loss) before income taxes |  | 22,362 | $ 41,871
Franchise royalties and fees |  |  |
Retained Earnings Adjustments [Line Items] |  |  |
Total revenues |  | 34,807 |
Accounting Standards Update 2014-09 |  |  |
Retained Earnings Adjustments [Line Items] |  |  |
Cumulative effect adjustment to retained earnings | $ (21,500) |  |
Accounting Standards Update 2014-09 | Franchise royalties and fees |  |  |
Retained Earnings Adjustments [Line Items] |  |  |
Cumulative effect adjustment to retained earnings | (10,800) |  |
Accounting Standards Update 2014-09 | Customer loyalty program |  |  |
Retained Earnings Adjustments [Line Items] |  |  |
Cumulative effect adjustment to retained earnings | (8,000) |  |
Accounting Standards Update 2014-09 | Marketing funds |  |  |
Retained Earnings Adjustments [Line Items] |  |  |
Cumulative effect adjustment to retained earnings | $ (2,700) |  |
Total Adjustments | Accounting Standards Update 2014-09 |  |  |
Retained Earnings Adjustments [Line Items] |  |  |
Total revenues |  | (2,436) |
Income (loss) before income taxes |  | $ 485 |

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