INVESTMENTS IN DEBT SECURITIES (Realized Gains on Bond Sales and Redemptions) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
INVESTMENTS IN DEBT SECURITIES [Abstract]
OTTI losses recognized on bonds held at each period-end				$ (6)
Gains recognized at time of sale or redemption	$ 2,156	$ 5,080	$ 26,420	5,080
Total net gains on bonds	$ 2,156	$ 5,080	$ 26,420	$ 5,074