INVESTMENTS (Schedule of Amortized Cost and Fair Value of Other Investments) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Investments, Debt and Equity Securities [Abstract]
Equity securities - bank stock, Amortized Cost	$ 544	$ 544
Equity securities - bank stock, Unrealized Gains	1,130	1,130
Equity securities - bank stock, Unrealized Losses	0	0
Equity securities - bank stock, Fair Value	1,674	1,674
FHLBB (carried at cost)	8,008	6,601
FRB (carried at cost)	5,374	5,374
Other Investments, Amortized Cost	13,926	12,519
Other Investments, Unrealized Gain	1,130	1,130
Other Investments, Unrealized Loss	0	0
Other Investments, Fair Value	$ 15,056	$ 13,649