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POLICY LIABILITIES - Net Amount of Risk by Product and Guarantee (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
USD ($)
contractholder
Dec. 31, 2021
USD ($)
contractholder
Guaranteed Lifetime Withdrawal Benefit    
Net Amount at Risk by Product and Guarantee [Line Items]    
Account value $ 10,444,227 $ 11,057,318
Net amount at risk $ 4,761,980 $ 3,655,914
Number of contractholders (in contractholders) | contractholder 80,559 80,955
Variable annuity    
Net Amount at Risk by Product and Guarantee [Line Items]    
Account value $ 5,351,970 $ 6,833,977
Net amount at risk $ 800,383 $ 391,519
Average attained age of contractholders 71 years 71 years
Number of contractholders (in contractholders) | contractholder 71,944 77,059
Variable annuity | Net deposits paid    
Net Amount at Risk by Product and Guarantee [Line Items]    
Account value $ 3,516,540 $ 4,615,409
Net amount at risk $ 274,144 $ 95,467
Average attained age of contractholders 69 years 69 years
Variable annuity | Ratchet (highest historical account value at specified anniversary dates)    
Net Amount at Risk by Product and Guarantee [Line Items]    
Account value $ 575,999 $ 512,683
Net amount at risk $ 41,145 $ 15,827
Average attained age of contractholders 71 years 72 years
Variable annuity | Roll-up (net deposits accumulated at a specified rate)    
Net Amount at Risk by Product and Guarantee [Line Items]    
Account value $ 0 $ 11,053
Net amount at risk $ 0 $ 1,801
Average attained age of contractholders 0 years 84 years
Variable annuity | Higher of ratchet or roll-up    
Net Amount at Risk by Product and Guarantee [Line Items]    
Account value $ 1,259,431 $ 1,694,832
Net amount at risk $ 485,094 $ 278,424
Average attained age of contractholders 77 years 77 years