Business Combination - Pro Forma Financial Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2025	Dec. 28, 2024
Business Combination, Asset Acquisition, Transaction between Entities under Common Control, and Joint Venture Formation [Abstract]
Pro forma revenue	$ 1,683,120	$ 1,588,439
Pro forma net loss	$ (46,388)	$ (130,379)