INVESTMENTS - Schedule of Consolidated Statements of Operations Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Income
Investment income	$ 151,847	$ 164,338	$ 304,186	$ 325,851
Expenses
Net investment income before taxes	70,724	$ 77,700	136,507	$ 155,795
NH Keystone [Member]
Income
Investment income	7,599		13,627
Expenses
Net operating expenses	3,359		6,050
Net investment income before taxes	4,240		7,577
Total net realized and unrealized gain (loss)	(982)		(2,228)
Net increase (decrease) in members' equity resulting from operations	$ 3,258		$ 5,349

Amount, after investment expense, of income earned from investments in securities and real estate. Includes, but is not limited to, real estate investment, policy loans, dividends, and interest. Excludes realized gain (loss) on investments.