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INVESTMENTS - Repurchase Agreements (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Schedule of Investments [Line Items]    
Total $ 833,568 $ 312,965
Corporate Securities    
Schedule of Investments [Line Items]    
Total 833,568 312,965
Overnight    
Schedule of Investments [Line Items]    
Total 0 0
Overnight | Corporate Securities    
Schedule of Investments [Line Items]    
Total 0 0
Less than 30 Days    
Schedule of Investments [Line Items]    
Total 0 0
Less than 30 Days | Corporate Securities    
Schedule of Investments [Line Items]    
Total 0 0
30 - 90 Days    
Schedule of Investments [Line Items]    
Total 507,656 0
30 - 90 Days | Corporate Securities    
Schedule of Investments [Line Items]    
Total 507,656 0
Greater than 90 Days    
Schedule of Investments [Line Items]    
Total 325,912 312,965
Greater than 90 Days | Corporate Securities    
Schedule of Investments [Line Items]    
Total $ 325,912 $ 312,965