CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 28, 2020	Mar. 30, 2019
Revenue:
Total revenue	$ 330,273	$ 292,707
Cost of revenue:
Amortization of intangible assets	8,628	8,252
Acquisition and integration costs	1,035	2,064
Restructuring and related	1,157	21,466
Total cost of revenue	253,307	226,275
Gross profit	76,966	66,432
Operating expenses:
Research and development	68,180	73,660
Sales and marketing	36,689	40,037
General and administrative	29,620	33,044
Amortization of intangible assets	4,555	7,057
Acquisition and integration costs	9,222	7,134
Restructuring and related	5,580	17,188
Total operating expenses	153,846	178,120
Loss from operations	(76,880)	(111,688)
Other income (expense), net:
Interest income	24	766
Interest expense	(8,794)	(7,563)
Other gain (loss), net	(12,682)	(2,923)
Total other income (expense), net	(21,452)	(9,720)
Loss before income taxes	(98,332)	(121,408)
Provision for income taxes	936	193
Net loss	$ (99,268)	$ (121,601)
Net loss per common share:
Basic (in usd per share)	$ (0.55)	$ (0.69)
Diluted (in usd per share)	$ (0.55)	$ (0.69)
Weighted average shares used in computing net loss per common share:
Basic (in shares)	182,024	176,406
Diluted (in shares)	182,024	176,406
Product
Revenue:
Revenue	$ 255,192	$ 223,007
Cost of revenue:
Cost of revenue	201,792	157,817
Services
Revenue:
Revenue	75,081	69,700
Cost of revenue:
Cost of revenue	$ 40,695	$ 36,676