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Marketable Securities (Details) - USD ($) $ in Thousands | Jun. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Amortized Cost |  |
Amortized Cost | $ 331,429 | $ 369,809
Gross Unrealized Losses |  |
Gross Unrealized Losses | (3,013) | (702)
Fair Value |  |
Fair Value | 328,416 | 369,107
U.S. government and municipal obligations |  |
Amortized Cost |  |
Maturing in one year or less | 152,518 | 80,674
Maturing after one year through three years | 3,887 | 51,319
Amortized Cost | 156,405 | 131,993
Gross Unrealized Losses |  |
Maturing in one year or less | (1,494) | (133)
Maturing after one year through three years | (17) | (184)
Gross Unrealized Losses | (1,511) | (317)
Fair Value |  |
Maturing in one year or less | 151,024 | 80,541
Maturing after one year through three years | 3,870 | 51,135
Fair Value | 154,894 | 131,676
Corporate debt securities |  |
Amortized Cost |  |
Maturing in one year or less | 149,304 | 170,034
Maturing after one year through three years | 25,720 | 67,782
Amortized Cost | 175,024 | 237,816
Gross Unrealized Gains |  |
Maturing in one year or less | 0 |
Maturing after one year through three years | 0 |
Gross Unrealized Gains | 0 |
Gross Unrealized Losses |  |
Maturing in one year or less | (829) | (28)
Maturing after one year through three years | (673) | (357)
Gross Unrealized Losses | (1,502) | (385)
Fair Value |  |
Maturing in one year or less | 148,475 | 170,006
Maturing after one year through three years | 25,047 | 67,425
Fair Value | $ 173,522 | $ 237,431

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