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INVESTMENTS - Other Investments (Details) $ in Thousands | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2023 USD ($) fund | Dec. 31, 2022 USD ($)
Other Investments [Line Items] |  |
Other investments, at fair value | $ 970,079 | $ 996,751
Percentage of total fair value (as a percent) | 100.00% | 100.00%
Multi-strategy funds |  |
Other Investments [Line Items] |  |
Other investments, at fair value | $ 26,126 | $ 32,616
Percentage of total fair value (as a percent) | 3.00% | 3.00%
Multi-strategy funds | Minimum |  |
Other Investments [Line Items] |  |
Redemption notice period | 60 days | 60 days
Multi-strategy funds | Maximum |  |
Other Investments [Line Items] |  |
Redemption notice period | 90 days | 90 days
Multi-strategy funds | Other Redemption Restriction |  |
Other Investments [Line Items] |  |
Unfunded commitments related to other investments | $ 28,000 | $ 26,000
Multi-strategy funds | Other Redemption Restriction | Minimum |  |
Other Investments [Line Items] |  |
Investment term | 2 years |
Direct lending funds |  |
Other Investments [Line Items] |  |
Other investments, at fair value | $ 248,834 | $ 258,626
Percentage of total fair value (as a percent) | 26.00% | 26.00%
Redemption notice period | 90 days | 90 days
Direct lending funds | Other Redemption Restriction |  |
Other Investments [Line Items] |  |
Unfunded commitments related to other investments | $ 192,000 | $ 183,000
Optional extension of investment term | 3 years |
Direct lending funds | Other Redemption Restriction | Minimum |  |
Other Investments [Line Items] |  |
Investment term | 4 years |
Direct lending funds | Other Redemption Restriction | Maximum |  |
Other Investments [Line Items] |  |
Investment term | 12 years |
Direct lending funds | Quarterly Redemption |  |
Other Investments [Line Items] |  |
Other investments, at fair value | $ 30,000 | 39,000
Number of funds | fund | 1 |
Private equity funds |  |
Other Investments [Line Items] |  |
Other investments, at fair value | $ 272,249 | $ 265,836
Percentage of total fair value (as a percent) | 28.00% | 27.00%
Private equity funds | Other Redemption Restriction |  |
Other Investments [Line Items] |  |
Unfunded commitments related to other investments | $ 161,000 | $ 158,000
Investment term | 5 years |
Real estate funds |  |
Other Investments [Line Items] |  |
Other investments, at fair value | $ 302,945 | $ 298,499
Percentage of total fair value (as a percent) | 31.00% | 30.00%
Real estate funds | Minimum |  |
Other Investments [Line Items] |  |
Redemption notice period | 45 days | 45 days
Real estate funds | Maximum |  |
Other Investments [Line Items] |  |
Redemption notice period | 90 days | 90 days
Real estate funds | Other Redemption Restriction |  |
Other Investments [Line Items] |  |
Unfunded commitments related to other investments | $ 129,000 | $ 141,000
Real estate funds | Other Redemption Restriction | Minimum |  |
Other Investments [Line Items] |  |
Investment term | 2 years |
Real estate funds | Quarterly Redemption |  |
Other Investments [Line Items] |  |
Other investments, at fair value | $ 68,000 | 73,000
Number of funds | fund | 1 |
Real estate funds | Annual Redemption |  |
Other Investments [Line Items] |  |
Other investments, at fair value | $ 25,000 | 27,000
Number of funds | fund | 1 |
CLO-Equities |  |
Other Investments [Line Items] |  |
Other investments, at fair value | $ 4,877 | $ 5,016
Percentage of total fair value (as a percent) | 0.00% | 0.00%
Other privately held investments |  |
Other Investments [Line Items] |  |
Other investments, at fair value | $ 115,048 | $ 136,158
Percentage of total fair value (as a percent) | 12.00% | 14.00%
Hedge funds | Lockup Redemption Restriction |  |
Other Investments [Line Items] |  |
Fair value of other investments subject to redemption restrictions | $ 0 | $ 0

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