Condensed Consolidated Statements of Operations and Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 26, 2020	Sep. 28, 2019	Sep. 26, 2020	Sep. 28, 2019
Revenue:
Total net revenue	$ 485,353	$ 431,902	$ 1,215,064	$ 1,322,568
Costs applicable to revenue (exclusive of depreciation and amortization):
Total costs applicable to revenue	210,809	204,502	570,143	618,978
Operating expenses:
Selling, general and administrative expenses	190,518	190,290	520,841	566,444
Depreciation and amortization	22,236	22,336	68,970	63,570
Asset impairment	7,150	3,516	20,916	7,387
Litigation settlement	0	0	4,395	0
Other expense (income), net	(154)	146	(312)	975
Total operating expenses	219,750	216,288	614,810	638,376
Income from operations	54,794	11,112	30,111	65,214
Interest expense, net	12,475	7,873	35,432	25,902
Debt issuance costs	0	0	136	0
Loss on extinguishment of debt	0	9,786	0	9,786
Earnings (loss) before income taxes	42,319	(6,547)	(5,457)	29,526
Income tax provision (benefit)	7,030	(7,739)	(6,655)	647
Net income	$ 35,289	$ 1,192	$ 1,198	$ 28,879
Earnings per share:
Basic (in usd per share)	$ 0.44	$ 0.02	$ 0.01	$ 0.37
Diluted (in usd per share)	$ 0.42	$ 0.01	$ 0.01	$ 0.35
Weighted average shares outstanding:
Basic (shares)	80,676	78,474	80,376	78,387
Diluted (shares)	83,795	81,561	82,718	81,510
Comprehensive income:
Net income	$ 35,289	$ 1,192	$ 1,198	$ 28,879
Unrealized gain (loss) on hedge instruments	1,894	681	(2,853)	(2,837)
Tax provision (benefit) of unrealized gain (loss) on hedge instruments	483	175	(723)	(727)
Comprehensive income (loss)	36,700	1,698	(932)	26,769
Products
Revenue:
Total net revenue	403,336	355,789	1,005,884	1,096,482
Costs applicable to revenue (exclusive of depreciation and amortization):
Total costs applicable to revenue	148,274	144,518	402,279	444,177
Services and plans
Revenue:
Total net revenue	82,017	76,113	209,180	226,086
Costs applicable to revenue (exclusive of depreciation and amortization):
Total costs applicable to revenue	$ 62,535	$ 59,984	$ 167,864	$ 174,801