INVESTMENT SECURITIES - Schedules of Proceeds from Sale of Investment Securities (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Investments, Debt and Equity Securities [Abstract]
Proceeds from sale	$ 7,021	$ 63,488	$ 7,021	$ 82,537
Gross gains	35		35
Gross gains		27		275
Gross losses	$ (20)		$ (20)
Gross losses		$ 0		$ (33)