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Financial Instruments - Unrealized Losses for Investments in a Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands | Mar. 31, 2023 | Dec. 31, 2022
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Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items] |  |
Less than 12 months, fair value | $ 6,610 | $ 21,554
12 months or greater, fair value | 77,077 | 74,205
Fair value | 83,687 | 95,759
Less than 12 months, unrealized loss | (23) | (639)
12 months or greater, unrealized loss | (2,634) | (2,992)
Unrealized loss | (2,657) | (3,631)
Corporate bonds |  |
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items] |  |
Less than 12 months, fair value | 1,793 | 10,639
12 months or greater, fair value | 58,022 | 54,634
Fair value | 59,815 | 65,273
Less than 12 months, unrealized loss | (9) | (440)
12 months or greater, unrealized loss | (2,178) | (2,475)
Unrealized loss | (2,187) | (2,915)
U.S. government treasury bonds |  |
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items] |  |
Less than 12 months, fair value | 0 | 5,262
12 months or greater, fair value | 14,698 | 14,748
Fair value | 14,698 | 20,010
Less than 12 months, unrealized loss | 0 | (177)
12 months or greater, unrealized loss | (356) | (372)
Unrealized loss | (356) | (549)
Asset-backed securities |  |
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items] |  |
Less than 12 months, fair value | 2,780 | 2,636
12 months or greater, fair value | 1,053 | 1,275
Fair value | 3,833 | 3,911
Less than 12 months, unrealized loss | (13) | (17)
12 months or greater, unrealized loss | (11) | (20)
Unrealized loss | (24) | (37)
Municipal bonds |  |
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items] |  |
Less than 12 months, fair value | 0 | 0
12 months or greater, fair value | 2,154 | 2,412
Fair value | 2,154 | 2,412
Less than 12 months, unrealized loss | 0 | 0
12 months or greater, unrealized loss | (36) | (61)
Unrealized loss | (36) | (61)
U.S. government agency bonds |  |
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items] |  |
Less than 12 months, fair value | 2,037 | 3,017
12 months or greater, fair value | 1,150 | 1,136
Fair value | 3,187 | 4,153
Less than 12 months, unrealized loss | (1) | (5)
12 months or greater, unrealized loss | (53) | (64)
Unrealized loss | $ (54) | $ (69)

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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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- Definition 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. + References Reference 1: 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 2: 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 + Details
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