EMPLOYEE BENEFITS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Pension Benefits
Change in benefit obligation:
Benefit obligation at beginning of year	$ 18,960	$ 13,243
Service cost	1,134	905	$ 931
Interest cost	706	639	564
Benefits paid and expected expenses	(264)	(282)
Assumption changes and other	$ (2,021)	$ 4,455
Plan amendment
Benefit obligation at end of year	$ 18,515	$ 18,960	13,243
Change in plan assets, at fair value:
Plan assets at beginning of year	23,887	21,828
Actual return on plan assets	(60)	981
Employer contribution	999	1,361
Benefits paid and actual expenses	(264)	(283)
Plan assets at end of year	24,562	23,887	21,828
Funded status (plan assets less benefit obligations)	6,047	4,927
SERP Benefits
Change in benefit obligation:
Benefit obligation at beginning of year	2,457	1,919
Service cost	168	132	149
Interest cost	91	88	76
Benefits paid and expected expenses	(112)	(112)
Assumption changes and other	$ (49)	$ 430
Plan amendment
Benefit obligation at end of year	$ 2,555	$ 2,457	$ 1,919
Change in plan assets, at fair value:
Plan assets at beginning of year
Actual return on plan assets
Employer contribution	$ 112	$ 112
Benefits paid and actual expenses	$ (112)	$ (112)
Plan assets at end of year
Funded status (plan assets less benefit obligations)	$ (2,555)	$ (2,457)