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INVESTMENTS (Narrative) (Details) - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Gain (Loss) on Investments [Line Items]    
Held-to-maturity securities, unrecognized holding loss   $ 0
Other-than-temporary impairments, available-for-sale securities $ 16,000 0
Single largest loss position 145,000 75,000
Second largest loss position 99,000 60,000
Third largest loss position $ 94,000 $ 53,000
Maximum    
Gain (Loss) on Investments [Line Items]    
Percent of investment portfolio below investment grade 4.69%