Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 24, 2021	Sep. 25, 2020	Sep. 24, 2021	Sep. 25, 2020
Income Statement [Abstract]
Net sales	$ 260,746	$ 226,276	$ 734,519	$ 588,006
Costs and expenses:
Cost of sales, exclusive of depreciation and amortization	151,281	133,131	432,297	342,764
Selling, general and administrative expenses	105,005	66,962	259,019	194,443
Depreciation and amortization	14,287	14,368	42,197	43,351
Total costs and expenses	270,573	214,461	733,513	580,558
(Loss) income from operations	(9,827)	11,815	1,006	7,448
Other expenses (income):
Interest expense	7,511	11,330	26,589	35,875
Other expense (income), net	6,931	(224)	6,422	(1,558)
Total other expenses	14,442	11,106	33,011	34,317
(Loss) income before income taxes	(24,269)	709	(32,005)	(26,869)
Income tax benefit	(2,729)	(694)	(3,373)	(6,025)
Net (loss) income	(21,540)	1,403	(28,632)	(20,844)
Net loss attributable to noncontrolling interest	(11)	(14)	(45)	(54)
Net (loss) income attributable to Company	$ (21,529)	$ 1,417	$ (28,587)	$ (20,790)
Net (loss) income per share, basic (in dollars per share)	$ (0.31)	$ 0.02	$ (0.46)	$ (0.35)
Net (loss) income per share, diluted (in dollars per share)	$ (0.31)	$ 0.02	$ (0.46)	$ (0.35)
Weighted-average shares outstanding - basic (in shares)	68,672	59,217	62,369	59,011
Weighted-average shares outstanding - diluted (in shares)	68,672	59,217	62,369	59,011