INVESTMENTS (Major Categories of Investment Gains and Losses) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Gain (Loss) on Securities [Line Items]
Net investment gains (losses)	$ 117	$ (200)	$ 2,237	$ (464)
Gains (losses) on trading securities	5	0	8	0
Realized gains on fixed maturities
Gain (Loss) on Securities [Line Items]
Net investment gains (losses)	5	48	15	129
Change in fair value of equity securities
Gain (Loss) on Securities [Line Items]
Net investment gains (losses)	26	(163)	152	(369)
Change in surrender value of company owned life insurance
Gain (Loss) on Securities [Line Items]
Net investment gains (losses)	81	3	270	(136)
Realized gain on company owned life insurance
Gain (Loss) on Securities [Line Items]
Net investment gains (losses)	0	0	1,792	0
Other, principally real estate
Gain (Loss) on Securities [Line Items]
Net investment gains (losses)	$ 0	$ (88)	$ 0	$ (88)