Segments - Summary of Long-lived Asset Information By Geographic Area (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Jan. 01, 2023
Segment Reporting Information [Line Items]
Long-lived assets by geography	$ 1,798,895	$ 1,754,209
United Kingdom
Segment Reporting Information [Line Items]
Long-lived assets by geography	556,628	509,221
North America [Member]
Segment Reporting Information [Line Items]
Long-lived assets by geography	877,071	901,505
Europe [Member]
Segment Reporting Information [Line Items]
Long-lived assets by geography	317,502	297,247
Non-US [Member]
Segment Reporting Information [Line Items]
Long-lived assets by geography	$ 47,694	$ 46,236