Reportable Segments - Geographic Information (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Sep. 28, 2025	Jun. 29, 2025	Mar. 30, 2025	Dec. 29, 2024	Sep. 29, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Sep. 28, 2025	Sep. 29, 2024	Oct. 01, 2023
Reportable Segments
Revenue	$ 1,330,100	$ 1,369,816	$ 1,322,113	$ 1,420,561	$ 1,374,473	$ 1,344,323	$ 1,251,616	$ 1,228,267	$ 5,442,590	$ 5,198,679	$ 4,522,550
Long-lived assets	66,148				73,065				66,148	73,065
United States
Reportable Segments
Revenue									3,445,844	3,198,823	2,863,635
Long-lived assets	15,675				17,612				15,675	17,612
United Kingdom
Reportable Segments
Revenue									771,723	711,617	601,157
Long-lived assets	20,756				19,503				20,756	19,503
Australia
Reportable Segments
Revenue									489,102	529,114	449,507
Long-lived assets	10,793				11,990				10,793	11,990
Netherlands
Reportable Segments
Long-lived assets	8,932				12,371				8,932	12,371
Canada
Reportable Segments
Revenue									512,295	498,575	436,222
Long-lived assets	7,181				8,177				7,181	8,177
Other Countries
Reportable Segments
Revenue									223,626	260,550	$ 172,029
Long-lived assets	$ 2,811				$ 3,412				$ 2,811	$ 3,412