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Investments - Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Fair Value |  |
Less than 12 months | $ 405 | $ 1,790
12 months or greater | 27,123 | 48,858
Total | 27,528 | 50,648
Gross Unrealized Losses |  |
Less than 12 months | 0 | (2)
12 months or greater | (337) | (737)
Total | (337) | (739)
Corporate debt security |  |
Fair Value |  |
Less than 12 months | 405 | 1,790
12 months or greater | 23,477 | 37,775
Total | 23,882 | 39,565
Gross Unrealized Losses |  |
Less than 12 months | 0 | (2)
12 months or greater | (303) | (610)
Total | (303) | (612)
U.S. treasuries |  |
Fair Value |  |
Less than 12 months | 0 | 0
12 months or greater | 650 | 2,180
Total | 650 | 2,180
Gross Unrealized Losses |  |
Less than 12 months | 0 | 0
12 months or greater | (1) | (21)
Total | (1) | (21)
Asset-backed security and other |  |
Fair Value |  |
Less than 12 months | 0 | 0
12 months or greater | 2,996 | 5,248
Total | 2,996 | 5,248
Gross Unrealized Losses |  |
Less than 12 months | 0 | 0
12 months or greater | (33) | (76)
Total | $ (33) | (76)
Non-U.S. government and supranational bonds |  |
Fair Value |  |
Less than 12 months |  | 0
12 months or greater |  | 3,655
Total |  | 3,655
Gross Unrealized Losses |  |
Less than 12 months |  | 0
12 months or greater |  | (30)
Total |  | $ (30)

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- Definition 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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 5 -URI https://asc.fasb.org/extlink&oid=124269663&loc=SL82922890-210455 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27337-111563 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 55 -Paragraph 8 -URI https://asc.fasb.org/extlink&oid=121590138&loc=SL82922954-210456 + Details
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