INSURANCE INTANGIBLES, UNEARNED REVENUE RESERVES AND UNEARNED FRONT-END LOADS - Value of Business Acquired Asset (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Movement in Present Value of Future Insurance Profits [Roll Forward]
Balance, as of the beginning of the period	$ 1,252,984	$ 1,316,529
Amortization expense	(22,020)	(22,602)
Balance, as of the end of the period	1,230,964	1,293,927
Fixed rate annuities
Movement in Present Value of Future Insurance Profits [Roll Forward]
Balance, as of the beginning of the period	44,922	48,762
Amortization expense	(939)	(972)
Balance, as of the end of the period	43,983	47,790
Fixed indexed annuities
Movement in Present Value of Future Insurance Profits [Roll Forward]
Balance, as of the beginning of the period	621,372	663,296
Amortization expense	(10,719)	(10,358)
Balance, as of the end of the period	610,653	652,938
Interest sensitive life
Movement in Present Value of Future Insurance Profits [Roll Forward]
Balance, as of the beginning of the period	262,942	276,795
Amortization expense	(3,453)	(3,048)
Balance, as of the end of the period	259,489	273,747
Variable annuities
Movement in Present Value of Future Insurance Profits [Roll Forward]
Balance, as of the beginning of the period	245,042	241,778
Amortization expense	(5,201)	(6,370)
Balance, as of the end of the period	239,841	235,408
Other
Movement in Present Value of Future Insurance Profits [Roll Forward]
Balance, as of the beginning of the period	78,706	85,898
Amortization expense	(1,708)	(1,854)
Balance, as of the end of the period	$ 76,998	$ 84,044