INVESTMENTS (Schedule of Amortized Cost and Fair Value of Other Investments) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Investments, Debt and Equity Securities [Abstract]
Equity securities - bank stock, Amortized Cost	$ 544
Equity securities - bank stock, Unrealized Gains	217
Equity securities - bank stock, Unrealized Losses	0
Equity securities - bank stock, Fair Value	761
FHLBB (carried at cost)	17,639		$ 18,296
FRB (carried at cost)	5,374		5,374
Other Investments, Amortized Cost	23,557		23,670
Other Investments, Unrealized Gain	217	$ 0
Other Investments, Unrealized Loss	0	$ 0
Other Investments, Fair Value	$ 23,774		$ 23,670