Operating Property (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 25, 2021
Property, Plant and Equipment [Line Items]
Land	$ 16,328	$ 16,328
Buildings and improvements	69,160	65,034
Trailing equipment	502,322	479,300
Information technology hardware and software	110,626	91,115
Other equipment	9,828	9,708
Total operating property, gross	708,264	661,485
Less accumulated depreciation and amortization	393,274	344,099
Total operating property, net	$ 314,990	$ 317,386