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Convertible Senior Notes (Convertible Senior Notes Interest Expense) (Details) - 2025 Notes - Convertible debt - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 24, 2023
Sep. 25, 2022
Sep. 24, 2023
Sep. 25, 2022
Debt Instrument [Line Items]        
Coupon interest $ 1,310 $ 1,313 $ 3,932 $ 6,785
Debt issuance cost amortization 201 190 594 963
Total interest expense [1] $ 1,511 $ 1,503 $ 4,526 $ 7,748
Debt instrument, effective interest rate 5.85% 5.85% 5.85% 5.85%
[1] The effective rate of the 2025 Notes over their expected life is 5.85%. The decrease in interest expense during the thirty-nine weeks ended September 24, 2023 relates to the 2025 Notes Partial Repurchase in May 2022.