Leases - Components of lease cost (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2023	Dec. 31, 2022	Dec. 25, 2021
Operating lease cost:
Amortization of right-of-use assets	$ 8,339	$ 9,978	$ 10,283
Variable lease costs not included in liability	606	702	1,132
Total operating lease cost	8,945	10,680	11,415
Finance lease cost:
Amortization of right-of-use asset	1,568	1,590	1,493
Interest on lease liabilities	138	71	121
Total finance lease cost	$ 1,706	$ 1,661	$ 1,614