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Cash, Cash Equivalents, and Investments (Tables)
 9 Months Ended
Oct. 01, 2023
Cash and Cash Equivalents [Abstract]  
Components of Cash, Cash Equivalents, and Investments
Cash, cash equivalents, and investments consisted of the following (in thousands):
October 1, 2023December 31, 2022
Cash$153,785 $180,959 
Money market instruments241,716 415 
Cash and cash equivalents395,501 181,374 
Corporate bonds110,627 164,055 
Asset-backed securities3,084 26,890 
Treasury bills2,457 11,332 
Sovereign bonds979 — 
Agency bonds— 15,858 
Municipal bonds— 624 
Current investments117,147 218,759 
Corporate bonds238,778 374,440 
Treasury bills59,285 44,214 
Asset-backed securities33,967 33,539 
Sovereign bonds961 1,924 
Non-current investments332,991 454,117 
$845,639 $854,250 
Summary of Available-for-Sale Investments
The following table summarizes the Company’s available-for-sale investments as of October 1, 2023 (in thousands):
Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Fair Value
Current:
Corporate bonds$114,188 $— $(3,561)$110,627 
Asset-backed securities3,128 — (44)3,084 
Treasury bills2,498 — (41)2,457 
Sovereign bonds1,017 — (38)979 
Non-current:
Corporate bonds251,635 9 (12,866)238,778 
Treasury bills60,871 — (1,586)59,285 
Asset-backed securities35,512 — (1,545)33,967 
Sovereign bonds1,042 — (81)961 
$469,891 $9 $(19,762)$450,138 
Gross Unrealized Losses and Fair Values for Available-for-Sale Investments The following table summarizes the Company’s gross unrealized losses and fair values for available-for-sale investments in an unrealized loss position as of October 1, 2023 (in thousands):
 Unrealized Loss Position For: 
 Less than 12 Months12 Months or GreaterTotal
 Fair ValueUnrealized
Losses		Fair ValueUnrealized
Losses		Fair ValueUnrealized
Losses
Corporate bonds$103,100 $(2,900)$244,535 $(13,527)$347,635 $(16,427)
Treasury bills56,878 (1,492)4,864 (135)61,742 (1,627)
Asset-backed securities32,425 (1,465)4,626 (124)37,051 (1,589)
Sovereign bonds— — 1,940 (119)1,940 (119)
$192,403 $(5,857)$255,965 $(13,905)$448,368 $(19,762)
Realized Gain (Loss) on Investments
The following table summarizes the Company's gross realized gains and losses on the sale of debt securities for the three-month and nine-month periods ended October 1, 2023 and October 2, 2022 (in thousands):
Three-months EndedNine-months Ended
October 1, 2023October 2, 2022October 1, 2023October 2, 2022
Gross realized gains$109 $— $109 $133 
Gross realized losses(733)(79)(733)(236)
Net realized gains (losses)$(624)$(79)$(624)$(103)
Effective Maturity Dates of Available-for-Sale Investments
The following table presents the effective maturity dates of the Company’s available-for-sale investments as of October 1, 2023 (in thousands):
<1 year1-2 Years2-3 Years3-4 Years4-5 Years5-8 YearsTotal
Corporate bonds$110,627 $95,497 $65,409 $34,878 $42,539 $455 $349,405 
Treasury bills2,457 5,306 15,016 21,842 17,121 — 61,742 
Asset-backed securities3,084 12,722 10,584 3,978 — 6,683 37,051 
Sovereign bonds979 — 961 — — — 1,940 
$117,147 $113,525 $91,970 $60,698 $59,660 $7,138 $450,138