INVESTMENTS - Other Investments (Details) - Insurance - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Schedule of Investments [Line Items]
Other investments	$ 13,755,206	$ 9,683,326
Investments in Real Estate
Schedule of Investments [Line Items]
Other investments	7,172,981	4,778,431
Investments in Renewable Energy
Schedule of Investments [Line Items]
Other investments	1,349,150	1,348,080
Accumulated depreciation	172,800	154,100
Investments in Transportation and Other Leased Assets
Schedule of Investments [Line Items]
Other investments	3,033,344	2,972,469
Accumulated depreciation	371,800	313,600
Other Investment Funds and Partnerships
Schedule of Investments [Line Items]
Other investments	1,812,143	179,469
Federal Home Loan Bank (FHLB), Common Stock and Other Investments
Schedule of Investments [Line Items]
Other investments	$ 387,588	$ 404,877