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INVESTMENTS - Other Investments (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2015
Other Investments [Line Items] |  |  |
Fair value | $ 770,923 | $ 787,787 |
Percentage of total fair value | 100.00% | 100.00% |
Unfunded commitments related to other investments | $ 588,000 | $ 507,000 |
Long/short equity funds |  |  |
Other Investments [Line Items] |  |  |
Fair value | $ 31,248 | $ 26,779 |
Percentage of total fair value | 4.00% | 3.00% |
Redemption notice period | 60 days | 60 days |
Multi-strategy funds |  |  |
Other Investments [Line Items] |  |  |
Fair value | $ 136,542 | $ 167,819 |
Percentage of total fair value | 18.00% | 22.00% |
Multi-strategy funds | Other Redemption Restriction |  |  |
Other Investments [Line Items] |  |  |
Unfunded commitments related to other investments | $ 24,000 | $ 84,000 |
Investment term | 2 years |  |
Multi-strategy funds | Minimum |  |  |
Other Investments [Line Items] |  |  |
Redemption notice period | 60 days | 45 days |
Multi-strategy funds | Maximum |  |  |
Other Investments [Line Items] |  |  |
Redemption notice period | 90 days | 95 days |
Direct lending funds |  |  |
Other Investments [Line Items] |  |  |
Fair value | $ 277,395 | $ 274,478 |
Percentage of total fair value | 36.00% | 35.00% |
Direct lending funds | Other Redemption Restriction |  |  |
Other Investments [Line Items] |  |  |
Unfunded commitments related to other investments | $ 170,000 | $ 210,000 |
Optional extension of investment term | 3 years |  |
Direct lending funds | Minimum | Other Redemption Restriction |  |  |
Other Investments [Line Items] |  |  |
Investment term | 5 years |  |
Direct lending funds | Maximum | Other Redemption Restriction |  |  |
Other Investments [Line Items] |  |  |
Investment term | 10 years |  |
Private equity funds |  |  |
Other Investments [Line Items] |  |  |
Fair value | $ 80,412 | $ 64,566 |
Percentage of total fair value | 10.00% | 8.00% |
Private equity funds | Other Redemption Restriction |  |  |
Other Investments [Line Items] |  |  |
Unfunded commitments related to other investments | $ 261,000 | $ 16,000 |
Investment term | 5 years |  |
Real estate funds |  |  |
Other Investments [Line Items] |  |  |
Fair value | $ 130,112 | $ 84,202 |
Percentage of total fair value | 17.00% | 11.00% |
Real estate funds | Other Redemption Restriction |  |  |
Other Investments [Line Items] |  |  |
Unfunded commitments related to other investments | $ 82,000 | $ 147,000 |
Real estate funds | Minimum | Other Redemption Restriction |  |  |
Other Investments [Line Items] |  |  |
Investment term | 7 years |  |
CLO-Equities |  |  |
Other Investments [Line Items] |  |  |
Fair value | $ 14,328 | $ 21,271 |
Percentage of total fair value | 2.00% | 2.00% |
Other privately held investments |  |  |
Other Investments [Line Items] |  |  |
Fair value | $ 36,934 | $ 44,518 |
Percentage of total fair value | 5.00% | 6.00% |
Overseas deposits |  |  |
Other Investments [Line Items] |  |  |
Fair value | $ 63,952 | $ 104,154 |
Percentage of total fair value | 8.00% | 13.00% |
Hedge funds | Lockup Redemption Restriction |  |  |
Other Investments [Line Items] |  |  |
Fair value of other investments subject to redemption restrictions | $ 69,000 | $ 27,000 |
Percentage of fair value of other investments subject to redemption restrictions | 41.00% | 14.00% |
Bank Revolver Opportunity Funds | Other Redemption Restriction |  |  |
Other Investments [Line Items] |  |  |
Unfunded commitments related to other investments |  |  | $ 50,000
Investment term | 7 years |  |
Optional extension of investment term | 2 years |  |

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- Definition The percentage of the total fair value of investments in certain entities that calculate net asset value per share, including, but not limited to, by unit, membership interest, or other ownership interest. Investments include, but are not limited to, investments in certain hedge funds, venture capital funds, private equity funds, real estate partnerships or funds. + References No definition available. + Details
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