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Cash and Investments (Tables)
 3 Months Ended
Apr. 01, 2022
Investments, Debt and Equity Securities [Abstract]  
Schedule of Reconciliation of Cash, Cash Equivalents, and Restricted Cash A reconciliation of cash, cash equivalents, and restricted cash equivalents reported in the accompanying Condensed Consolidated Balance Sheets to the amount reported within the accompanying Condensed Consolidated Statements of Cash Flows was as follows (in thousands):
 
March 31, 2022December 31, 2021
Cash and cash equivalents$723,269 $647,169 
Restricted cash equivalents included in other long-term assets14,007 16,722 
Cash, cash equivalents, and restricted cash equivalents as reported in the accompanying Condensed Consolidated Statements of Cash Flows$737,276 $663,891 
Schedule of Reconciliation of Cash, Cash Equivalents, and Restricted Cash A reconciliation of cash, cash equivalents, and restricted cash equivalents reported in the accompanying Condensed Consolidated Balance Sheets to the amount reported within the accompanying Condensed Consolidated Statements of Cash Flows was as follows (in thousands):
 
March 31, 2022December 31, 2021
Cash and cash equivalents$723,269 $647,169 
Restricted cash equivalents included in other long-term assets14,007 16,722 
Cash, cash equivalents, and restricted cash equivalents as reported in the accompanying Condensed Consolidated Statements of Cash Flows$737,276 $663,891 
Schedule of Investments by Security Type
Cash, cash equivalents, restricted cash equivalents and investments consisted of the following (in thousands):
March 31, 2022
Amortized Cost
Gross Unrealized Gains
Gross Unrealized Losses
Fair Value
Debt securities available-for-sale:
Commercial paper$954,283 $5 $(26)$954,262 
Corporate bonds529,129 95 (7,123)522,101 
U.S. Treasury and government-sponsored enterprises197,605 — (1,141)196,464 
Municipal bonds13,455 — (169)13,286 
Total debt securities available-for-sale1,694,472 100 (8,459)1,686,113 
Cash97,602 — — 97,602 
Money market funds87,255 — — 87,255 
Certificates of deposit117,901 — — 117,901 
Total cash, cash equivalents, restricted cash equivalents and investments$1,997,230 $100 $(8,459)$1,988,871 

December 31, 2021
Amortized Cost
Gross Unrealized Gains
Gross Unrealized Losses
Fair Value
Debt securities available-for-sale:
Commercial paper$945,801 $42 $(2)$945,841 
Corporate bonds541,774 876 (1,672)540,978 
U.S. Treasury and government-sponsored enterprises33,965 1 (21)33,945 
Municipal bonds12,924 15 (35)12,904 
Total debt securities available-for-sale1,534,464 934 (1,730)1,533,668 
Cash135,653 — — 135,653 
Money market funds66,531 — — 66,531 
Certificates of deposit119,056 — — 119,056 
Total cash, cash equivalents, restricted cash equivalents and investments
$1,855,704 $934 $(1,730)$1,854,908 
Schedule of Fair Value and Gross Unrealized Losses of Investments Available-for-Sale in an Unrealized Loss Position The fair value and gross unrealized losses on debt securities available-for-sale in an unrealized loss position were as follows (in thousands):
March 31, 2022
Fair ValueGross Unrealized Losses
Corporate bonds$456,676 $(7,123)
U.S. Treasury and government-sponsored enterprises196,464 (1,141)
Commercial paper32,460 (26)
Municipal bonds13,286 (169)
Total$698,886 $(8,459)
December 31, 2021
Fair ValueGross Unrealized Losses
Corporate bonds$385,053 $(1,672)
Commercial paper
43,290 (2)
U.S. Treasury and government-sponsored enterprises18,962 (21)
Municipal bonds7,475 (35)
Total$454,780 $(1,730)
Schedule of Fair Value of Cash Equivalents and Investments by Contractual Maturity
The fair value of debt securities available-for-sale by contractual maturity was as follows (in thousands):
 
March 31, 2022December 31, 2021
Maturing in one year or less$1,290,576 $1,168,256 
Maturing after one year through five years395,537 365,412 
Total debt securities available-for-sale$1,686,113 $1,533,668