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FAIR VALUE MEASUREMENTS - Changes in Level 3 for Financial Instruments (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2023 | Mar. 31, 2022
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Opening balance | $ 260,278 | $ 153,325
Transfers into Level 3 | 0 | 0
Transfers out of Level 3 | 0 | 0
Included in net income | 740 | 2,490
Included in OCI | 1,183 | (2,794)
Purchases | 23,369 | 30,797
Sales | 0 | 0
Settlements/ distributions | (9,171) | (2,573)
Closing balance | 276,399 | 181,245
Change in unrealized investment gains/(losses) | 747 | 2,490
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Opening balance | 0 | 5,630
Transfers into Level 3 | 0 | 0
Transfers out of Level 3 | 0 | 0
Included in net income | 0 | (556)
Included in OCI | 0 | 0
Purchases | 0 | 0
Sales | 0 | 0
Settlements/ distributions | 0 | 0
Closing balance | 0 | 5,074
Change in unrealized investment gains/(losses) | 0 | (556)
Other liabilities | Derivative instruments |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Opening balance | 0 | 5,630
Transfers into Level 3 | 0 | 0
Transfers out of Level 3 | 0 | 0
Included in net income | 0 | (556)
Included in OCI | 0 | 0
Purchases | 0 | 0
Sales | 0 | 0
Settlements/ distributions | 0 | 0
Closing balance | 0 | 5,074
Change in unrealized investment gains/(losses) | 0 | (556)
Fixed maturities, available for sale |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Opening balance | 119,104 | 42,894
Transfers into Level 3 | 0 | 0
Transfers out of Level 3 | 0 | 0
Included in net income | (7) | 0
Included in OCI | 1,183 | (2,794)
Purchases | 18,910 | 21,462
Sales | 0 | 0
Settlements/ distributions | (8,763) | (672)
Closing balance | 130,427 | 60,890
Change in unrealized investment gains/(losses) | 0 | 0
Fixed maturities, available for sale | Corporate debt |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Opening balance | 119,104 | 42,894
Transfers into Level 3 | 0 | 0
Transfers out of Level 3 | 0 | 0
Included in net income | (7) | 0
Included in OCI | 1,183 | (2,794)
Purchases | 18,910 | 21,462
Sales | 0 | 0
Settlements/ distributions | (8,763) | (672)
Closing balance | 130,427 | 60,890
Change in unrealized investment gains/(losses) | 0 | 0
Other investments |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Opening balance | 141,174 | 110,431
Transfers into Level 3 | 0 | 0
Transfers out of Level 3 | 0 | 0
Included in net income | 747 | 2,490
Included in OCI | 0 | 0
Purchases | 4,459 | 9,335
Sales | 0 | 0
Settlements/ distributions | (408) | (1,901)
Closing balance | 145,972 | 120,355
Change in unrealized investment gains/(losses) | 747 | 2,490
Other investments | CLO-Equities |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Opening balance | 5,016 | 5,910
Transfers into Level 3 | 0 | 0
Transfers out of Level 3 | 0 | 0
Included in net income | 411 | 872
Included in OCI | 0 | 0
Purchases | 0 | 0
Sales | 0 | 0
Settlements/ distributions | (408) | (1,901)
Closing balance | 5,019 | 4,881
Change in unrealized investment gains/(losses) | 411 | 872
Other investments | Other privately held investments |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Opening balance | 136,158 | 104,521
Transfers into Level 3 | 0 | 0
Transfers out of Level 3 | 0 | 0
Included in net income | 336 | 1,618
Included in OCI | 0 | 0
Purchases | 4,459 | 9,335
Sales | 0 | 0
Settlements/ distributions | 0 | 0
Closing balance | 140,953 | 115,474
Change in unrealized investment gains/(losses) | $ 336 | $ 1,618

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- Definition Amount of unrealized gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3) and still held. + 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 (d) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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- Definition Amount of unrealized gain (loss) recognized in income from liability measured at fair value on recurring basis using unobservable input (level 3) and still held. + 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 (d) -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 a liability 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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