INVESTMENTS - Credit loss table (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Balance at end of period	$ 323	$ 0	$ 0
Expected credit losses on securities where credit losses were not previously recognized	95	22,570	0
Additions (reductions) for expected credit losses on securities where credit losses were previously recognized	50	(11,542)	0
Impairments of securities which the Company intends to sell or more likely than not will be required to sell	0	0	0
Securities sold/redeemed/matured	(155)	(10,705)	0
Balance at end of period	$ 313	$ 323	$ 0