Balance Sheet Details - Restructuring (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Sep. 26, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 6,286	$ 6,286	$ 0	$ 5,705
Restructuring Reserve [Roll Forward]
Balance as of March 28, 2020	0
Restructuring charges	6,286	6,286	$ 0	$ 5,705
Asset write-down	(3,748)
Cash payments	(1,162)
Balance as of December 31, 2020		1,376
All Platform Future And Work-From-Anywhere Culture Alignment
Restructuring Cost and Reserve [Line Items]
Restructuring charges		6,300
Asset, write-off		300
Accrued common areas maintenance fees and property taxes, write-off		1,400
Restructuring Reserve [Roll Forward]
Restructuring charges		6,300
Facilities
Restructuring Cost and Reserve [Line Items]
Restructuring charges	5,112
Restructuring Reserve [Roll Forward]
Balance as of March 28, 2020	0
Restructuring charges	5,112
Asset write-down	(3,748)
Cash payments	(120)
Balance as of December 31, 2020		1,244
Facilities | Richardson, Texas and San Jose, California
Restructuring Cost and Reserve [Line Items]
Restructuring charges		3,500
Restructuring Reserve [Roll Forward]
Restructuring charges		3,500
Severance and Related Benefits
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1,174
Restructuring Reserve [Roll Forward]
Balance as of March 28, 2020	0
Restructuring charges	1,174
Asset write-down	0
Cash payments	$ (1,042)
Balance as of December 31, 2020		$ 132