Cash, Cash Equivalents, and Investments - Effective Maturity Dates of Available-for-Sale Investments (Details) $ in Thousands	Jun. 28, 2020 USD ($)
Debt Securities, Available-for-sale [Line Items]
1 year or less	$ 143,084
1-2 years	243,567
2-3 years	208,888
3-4 years	10,391
4-5 years	4,241
Fair value	610,171
Corporate Bonds
Debt Securities, Available-for-sale [Line Items]
1 year or less	42,248
1-2 years	81,987
2-3 years	102,034
3-4 years	10,391
4-5 years	0
Fair value	236,660
Treasury Bills
Debt Securities, Available-for-sale [Line Items]
1 year or less	34,018
1-2 years	138,612
2-3 years	58,062
3-4 years	0
4-5 years	0
Fair value	230,692
Asset-Backed Securities
Debt Securities, Available-for-sale [Line Items]
1 year or less	50,311
1-2 years	13,750
2-3 years	23,308
3-4 years	0
4-5 years	4,241
Fair value	91,610
Sovereign Bonds
Debt Securities, Available-for-sale [Line Items]
1 year or less	14,869
1-2 years	9,218
2-3 years	3,430
3-4 years	0
4-5 years	0
Fair value	27,517
Agency Bonds
Debt Securities, Available-for-sale [Line Items]
1 year or less	0
1-2 years	0
2-3 years	22,054
3-4 years	0
4-5 years	0
Fair value	22,054
Municipal Bonds
Debt Securities, Available-for-sale [Line Items]
1 year or less	1,638
1-2 years	0
2-3 years	0
3-4 years	0
4-5 years	0
Fair value	$ 1,638