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Investments - Summary of Information Relating to Investments Measured at Fair Value for Company has Used Unobservable Inputs to Determine Fair Value (Parenthetical) (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2023 | Mar. 31, 2022
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |
Transfers out of Level III | $ 5,585 | [1] | $ 11,239 | [2]
Transfers into Level III | 6,519 | [3] | 9,432 | [4]
Debt securities |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |
Transfers out of Level III | 5,585 | [1] | 11,239 | [2]
Transfers into Level III | $ 6,519 | [3] | $ 9,432 | [4]
[1] | Transfers out of Level III represent a transfer of $5.6 million relating to debt securities for which pricing inputs, other than their quoted prices in active markets were observable as of March 31, 2023.
[2] | Transfers out of Level III represent a transfer of $11.2 million relating to debt securities for which pricing inputs, other than their quoted prices in active markets were observable as of March 31, 2022.
[3] | Transfers into Level III represent a transfer of $6.5 million relating to debt securities for which pricing inputs, other than their quoted prices in active markets were unobservable as of March 31, 2023.
[4] | Transfers into Level III represent a transfer of $9.4 million relating to debt securities for which pricing inputs, other than their quoted prices in active markets were unobservable as of March 31, 2022.

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Amount of transfer of financial instrument classified as an asset into level 3 of the fair value hierarchy. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(3) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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- Definition Amount of transfers of financial instrument classified as an asset out of level 3 of the fair value hierarchy. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(3) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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