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INVESTMENTS - Summary of Debt Securities, Held-to-Maturity (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
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Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss [Abstract] |  |
Amortized cost | $ 698,351 | $ 446,016
Allowance for expected credit losses | 0 | 0
Net carrying value | 698,351 | 446,016
Gross unrealized gains | 0 | 99
Gross unrealized losses | (23,608) | (1,082)
Fair value | 674,743 | 445,033
Corporate debt |  |
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss [Abstract] |  |
Amortized cost | 85,200 | 37,700
Allowance for expected credit losses | 0 | 0
Net carrying value | 85,200 | 37,700
Gross unrealized gains | 0 | 18
Gross unrealized losses | (11,428) | (146)
Fair value | 73,772 | 37,572
ABS |  |
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss [Abstract] |  |
Amortized cost | 613,151 | 408,316
Allowance for expected credit losses | 0 | 0
Net carrying value | 613,151 | 408,316
Gross unrealized gains | 0 | 81
Gross unrealized losses | (12,180) | (936)
Fair value | $ 600,971 | $ 407,461

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