Investments in Marketable Debt Securities, Available-for-Sale - Available-for-sale securities in a continuous unrealized loss position (Details) $ in Thousands	Dec. 31, 2021 USD ($)
Fair Value
Less than 12 months	$ 149,512
12 months or greater	0
Total	149,512
Gross Unrealized Losses
Less than 12 months	(381)
12 months or greater	0
Total	(381)
Corporate debt security
Fair Value
Less than 12 months	113,806
12 months or greater	0
Total	113,806
Gross Unrealized Losses
Less than 12 months	(303)
12 months or greater	0
Total	(303)
U.S. treasuries
Fair Value
Less than 12 months	5,604
12 months or greater	0
Total	5,604
Gross Unrealized Losses
Less than 12 months	(12)
12 months or greater	0
Total	(12)
Asset-backed security and other
Fair Value
Less than 12 months	7,961
12 months or greater	0
Total	7,961
Gross Unrealized Losses
Less than 12 months	(32)
12 months or greater	0
Total	(32)
Non-U.S. government and supranational bonds
Fair Value
Less than 12 months	20,140
12 months or greater	0
Total	20,140
Gross Unrealized Losses
Less than 12 months	(34)
12 months or greater	0
Total	(34)
Certificate of deposit
Fair Value
Less than 12 months	2,001
12 months or greater	0
Total	2,001
Gross Unrealized Losses
Less than 12 months	0
12 months or greater	0
Total	$ 0

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

+ References

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Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for 12 months or longer, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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