Operating Property (Detail) - USD ($) $ in Thousands	Dec. 28, 2024	Dec. 30, 2023
Property, Plant and Equipment [Line Items]
Land	$ 17,389	$ 16,328
Buildings and improvements	80,719	71,157
Trailing equipment	518,524	491,208
Information technology hardware and software	141,029	132,153
Other equipment	10,231	10,136
Total operating property, gross	767,892	720,982
Less accumulated depreciation and amortization	456,547	436,682
Total operating property, net	$ 311,345	$ 284,300