CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 29, 2024	Jul. 01, 2023	Jun. 29, 2024	Jul. 01, 2023
Income Statement [Abstract]
Revenue	$ 504,958	$ 471,945	$ 995,611	$ 938,358
Cost of revenue, excluding depreciation and amortization	346,691	316,690	691,490	638,638
Branch and regional administrative expenses	87,972	91,255	175,886	182,963
Corporate expenses	30,245	26,354	60,087	57,289
Depreciation and amortization	2,833	3,491	5,745	7,532
Acquisition-related costs		(32)		38
Other operating expense (income)	91	(3,305)	2,411	(3,233)
Operating income	37,126	37,492	59,992	55,131
Interest income	95	113	197	188
Interest expense	(39,613)	(37,985)	(79,260)	(73,943)
Other income	6,371	25,169	24,540	12,981
Income (loss) before income taxes	3,979	24,789	5,469	(5,643)
Income tax benefit (expense)	9,927	810	(2,735)	(756)
Net income (loss)	$ 13,906	$ 25,599	$ 2,734	$ (6,399)
Net income (loss) per share:
Net income (loss) per share, basic	$ 0.07	$ 0.14	$ 0.01	$ (0.03)
Weighted average shares of common stock outstanding, basic	192,600	189,071	192,420	189,063
Net income (loss) per share, diluted	$ 0.07	$ 0.13	$ 0.01	$ (0.03)
Weighted average shares of common stock outstanding, diluted	196,869	189,739	196,274	189,063