INVESTMENTS (Major Categories of Investment Gains and Losses) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Gain (Loss) on Securities [Line Items]
Investment gains	$ 11	$ 1,430	$ 752	$ 988
Gains (losses) on trading securities	0	5	13	(1)
Realized gains on fixed maturities
Gain (Loss) on Securities [Line Items]
Investment gains	0	1,091	106	1,107
Realized gains on equity securities
Gain (Loss) on Securities [Line Items]
Investment gains	0	0	357	0
Change in fair value of equity securities
Gain (Loss) on Securities [Line Items]
Investment gains	46	223	244	(272)
Change in surrender value of company owned life insurance
Gain (Loss) on Securities [Line Items]
Investment gains	(35)	125	26	165
Other gains (losses) principally real estate
Gain (Loss) on Securities [Line Items]
Investment gains	$ 0	$ (14)	$ 6	$ (11)