CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Jan. 01, 2022
Income Statement [Abstract]
Revenue	$ 1,787,645	$ 1,678,618
Cost of revenue, excluding depreciation and amortization	1,234,418	1,136,214
Branch and regional administrative expenses	357,230	297,381
Corporate expenses	137,864	130,387
Goodwill impairment	675,346	117,702
Depreciation and amortization	21,313	20,550
Acquisition-related costs	99	12,832
Other operating expense (income)	3,651	(337)
Operating loss	(642,276)	(36,111)
Interest income	679	253
Interest expense	(107,720)	(68,930)
Loss on debt extinguishment		(13,702)
Other income	85,503	4,914
Loss before income taxes	(663,814)	(113,576)
Total income tax (benefit) expense	1,780	(3,468)
Net loss	$ (662,034)	$ (117,044)
Net loss per share:
Net loss per share, basic	$ (3.57)	$ (0.69)
Net loss per share, diluted	$ (3.57)	$ (0.69)
Weighted average shares of common stock outstanding, basic	185,553	170,625
Weighted average shares of common stock outstanding, diluted	185,553	170,625