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Investments - Additional Information (Detail) - USD ($) | 12 Months Ended |
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Dec. 25, 2021 | Dec. 26, 2020
Debt Securities, Available-for-sale [Line Items] |  |
Investments maximum maturity period | 5 years |
Unrealized gain (loss), net of unrealized gains/losses, on the investments in the bond portfolio | $ 144,000 | $ 3,578,000
Insurance [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Restricted Cash and Cash Equivalents | 4,049,000 |
Guarantee Payment of Insurance Claims |  |
Debt Securities, Available-for-sale [Line Items] |  |
Letters of credit outstanding | 72,267,000 |
Current Investments |  |
Debt Securities, Available-for-sale [Line Items] |  |
Investments providing collateral for letters of credit to guarantee insurance claims | 31,729,000 |
Non-Current Investments |  |
Debt Securities, Available-for-sale [Line Items] |  |
Investments providing collateral for letters of credit to guarantee insurance claims | 44,069,000 |
Total non-current investments | $ 139,864,000 |

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- Definition Amount, before tax, of unrealized gain (loss) in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References No definition available. + Details
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