Contractual Maturities of Investments in Debt Securities Held (Detail) $ in Thousands	Sep. 29, 2024 USD ($)
Schedule of Available-for-sale Securities
Due within one year, cost	$ 41,673
Due after 1 year through 5 years, cost	25,690
Due after 5 years through 10 years, cost	7,950
Due after 10 years, cost	36,658
Total, cost	111,971
Due within one year, fair market value	41,631
Due after 1 year through 5 years, fair market value	25,729
Due after 5 years through 10 years, fair market value	7,908
Due after 10 years, fair maket value	30,187
Total, fair market value	$ 105,455