Fair Value Measurements - Carrying Amounts and Fair Values of Certain Assets (Detail) - USD ($) $ in Thousands	Sep. 06, 2026	Dec. 28, 2025
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents, carrying amount	$ 101,988	$ 54,306
Restricted cash equivalents, carrying amount	113,493	146,517
Investments in marketable securities, carrying amount	28,079	24,971
Advertising fund cash equivalents, restricted, carrying amount	57,259	65,604
Investment in DPC Dash	15,175	36,070
Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents, carrying amount	101,988	54,306
Restricted cash equivalents, carrying amount	113,493	146,517
Investments in marketable securities, carrying amount	28,079	24,971
Advertising fund cash equivalents, restricted, carrying amount	57,259	65,604
Investment in DPC Dash	15,175	36,070
Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents, carrying amount	0	0
Restricted cash equivalents, carrying amount	0	0
Investments in marketable securities, carrying amount	0	0
Advertising fund cash equivalents, restricted, carrying amount	0	0
Investment in DPC Dash	0	0
Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents, carrying amount	0	0
Restricted cash equivalents, carrying amount	0	0
Investments in marketable securities, carrying amount	0	0
Advertising fund cash equivalents, restricted, carrying amount	0	0
Investment in DPC Dash	$ 0	$ 0

Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

- Definition

Amount of cash and cash equivalent restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposit with financial institution, and account with general characteristic of demand deposit. Cash equivalent includes, but is not limited to, short-term, highly liquid investment that is both readily convertible to known amount of cash and so near maturity that it presents insignificant risk of change in value because of change in interest rate.

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