CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($)	3 Months Ended
	Apr. 03, 2021	Mar. 28, 2020
Income Statement [Abstract]
Revenue	$ 417,160,000	$ 355,223,000
Cost of revenue, excluding depreciation and amortization	285,477,000	247,682,000
Branch and regional administrative expenses	69,372,000	59,694,000
Corporate expenses	27,399,000	25,797,000
Depreciation and amortization	4,848,000	4,183,000
Acquisition-related costs	1,768,000	0
Operating income	28,296,000	17,867,000
Interest income	77,000	46,000
Interest expense	(22,425,000)	(21,063,000)
Gain on debt extinguishment		127,000
Other income	159,000	41,791,000
Income before income taxes	6,107,000	38,768,000
Income tax expense	(309,000)	(1,131,000)
Net income	$ 5,798,000	$ 37,637,000
Income per share:
Net income per share, basic	$ 0.04	$ 0.27
Weighted average shares of common stock outstanding, basic	142,122,934	137,468,875
Net income per share, diluted	$ 0.04	$ 0.27
Weighted average shares of common stock outstanding, diluted	146,266,014	140,330,909