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Marketable Securities (Details 3) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Debt securities, available-for-sale
Less than 12 months, fair value	$ 167,455	$ 338,605
Less than 12 months, gross unrealized losses	(3,592)	(1,071)
12 months or greater, fair value	1,878	0
12 months or greater, gross unrealized losses	(39)	0
Fair value	169,333	338,605
Gross unrealized losses	(3,631)	(1,071)
U.S. Government bonds and notes
Debt securities, available-for-sale
Less than 12 months, fair value	63,023	82,822
Less than 12 months, gross unrealized losses	(1,524)	(301)
Corporate notes, bonds and commercial paper
Debt securities, available-for-sale
Less than 12 months, fair value	104,432	255,783
Less than 12 months, gross unrealized losses	(2,068)	(770)
12 months or greater, fair value	1,878	0
12 months or greater, gross unrealized losses	$ (39)	$ 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.

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