PENSION PLAN - Summary of activity (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	May 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Pension expense	$ 286	$ 256	$ 273
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Discount rate used to re-measure pension obligation	4.23%	3.55%	4.05%	4.46%
Change in benefit obligation
Benefit obligation at beginning of year	$ 10,058	$ 9,021
Service cost	0	0	$ 0
Interest cost	352	360	367
Actuarial loss	348	95
Assumption changes	(1,127)	775
Curtailment impact	0	0
Benefits paid	(215)	(193)
Benefit obligation at end of year	9,416	10,058	9,021
Change in plan assets:
Fair value of plan assets at beginning of year	5,166	4,573
Actual return on plan assets	(429)	467
Employer contribution	716	319
Benefits paid	(215)	(193)
Fair value of plan assets at end of year	5,238	5,166	$ 4,573
Funded status	(4,179)	(4,892)
Unrecognized net actuarial loss	4,687	4,972
Unrecognized prior service cost	0	0
Prepaid pension cost recognized	508	80
Accumulated benefit obligation	$ 9,416	$ 10,058