v3.26.1
FAIR VALUE MEASUREMENTS - Schedule of Other Investments Measured Using Net Asset Valuations (Details) - Fair Value Measured at Net Asset Value Per Share - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]    
Fair Value $ 3,156,249 $ 2,775,499
Unfunded Commitments 2,656,085 2,266,285
Private credit funds    
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]    
Fair Value 1,531,757 1,445,158
Unfunded Commitments 2,021,558 1,605,126
Private equity funds    
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]    
Fair Value 793,136 701,837
Unfunded Commitments 634,527 661,159
Multi-strategy funds    
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]    
Fair Value 593,071 473,990
Unfunded Commitments 0 0
Insurance-linked securities funds    
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]    
Fair Value 162,192 154,514
Unfunded Commitments 0 0
Equity funds    
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]    
Fair Value 76,093 0
Unfunded Commitments $ 0 $ 0