INVESTMENTS (Narrative) (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Gain (Loss) on Securities [Line Items]
Held-to-maturity securities, unrealized losses	$ 0	$ 0
Other-than-temporary impairments, available-for-sale securities	238,000	0
Single largest loss position	356,000	60,000
Second largest loss position	289,000	23,000
Third largest loss position	$ 242,000	$ 20,000
Maximum
Gain (Loss) on Securities [Line Items]
Percent of investment portfolio below investment grade	4.00%