Marketable Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 369,991	$ 381,009
Gross Unrealized Gains	5	114
Gross Unrealized Losses	(1,747)	(381)
Fair Market Value	368,249	380,742
U.S. Treasury and government agencies
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	206,413	195,076
Gross Unrealized Gains	0	1
Gross Unrealized Losses	(1,578)	(358)
Fair Market Value	204,835	194,719
Corporate debt
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	163,578	185,933
Gross Unrealized Gains	5	113
Gross Unrealized Losses	(169)	(23)
Fair Market Value	$ 163,414	$ 186,023

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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