OTHER REAL ESTATE OWNED - Summary of other real estate owned net of valuation allowances (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Other Real Estate [Roll Forward]
Balance at beginning of period	$ 1,294	$ 2,059
Additions for new construction	607	583
Sales proceeds	(2,824)	(1,724)
Net gain from sales	1,032	258	$ 666
Write-downs	(120)	(127)
Additions for new construction	431	0
Acquired balance, net	0	245
Balance at end of period	$ 420	$ 1,294	$ 2,059