DERIVATIVES - Offsetting Assets and Liabilities (Details) - Insurance - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Derivative assets (excluding embedded derivatives)
Gross amount recognized	$ 2,001,907	$ 1,855,023
Gross amounts offset in the statements of financial position	(1,973,523)	(1,809,329)
Net amounts presented in the statements of financial condition	28,384	45,694
Collateral (received) / pledged	(16,333)	(45,095)
Net amount after collateral	12,051	599
Derivative liabilities (excluding embedded derivatives)
Gross amount recognized	1,005,773	1,057,277
Gross amounts offset in the statements of financial position	(851,062)	(911,080)
Net amounts presented in the statements of financial condition	154,711	146,197
Collateral (received) / pledged	198,464	167,973
Net amount after collateral	$ (43,753)	$ (21,776)