INVESTMENTS (Net Realized Gains (Losses) by Major Investment Category (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Gross realized and unrealized gains
Total gross realized and unrealized gains	$ 1,705	$ 3,147
Gross Realized and Unrealized Lossses [Abstract]
Debt And Equity Securities, Realized And Unrealized Losses	(4,530)	(846)
Net realized and unrealized gains (losses) on investments	(2,825)	2,301
Debt Securities
Gross realized and unrealized gains
Debt securities	1,386	317
Gross Realized and Unrealized Lossses [Abstract]
Debt Securities, Trading, Realized And Unrealized Losses	(148)	(400)
Equity Securities
Gross realized and unrealized gains
Equity securities	319	2,830
Gross Realized and Unrealized Lossses [Abstract]
Equity Securities, FV-NI, Realized And Unrealized Losses	$ (4,382)	$ (446)