EMPLOYEE BENEFITS (Details 2) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Components of net periodic benefit cost and other amounts recognized in Other Comprehensive Income
Total recognized in other comprehensive income, before tax	$ (196)	$ 5,529	$ (2,871)
Total recognized in other comprehensive income	(380)	3,348	(1,907)
Pension Benefits
Components of net periodic benefit cost and other amounts recognized in Other Comprehensive Income
Service cost	1,134	905	931
Interest cost	706	639	564
Expected return on plan assets	(1,838)	(1,625)	(1,385)
Amortization of net loss	376	27	325
Amortization of unrecognized prior service cost	$ (77)	$ (77)	$ (77)
Amortization of unrecognized transition (asset) obligation
Net periodic benefit cost (credit)	$ 301	$ (131)	$ 358
Net (gain) loss	$ (123)	$ 5,099	$ (2,677)
Prior service cost
Transition obligation
Amortization of net loss	$ (376)	$ (27)	$ (325)
Amortization of prior service cost	$ 77	$ 77	$ 77
Amortization of transition obligation
Total recognized in other comprehensive income, before tax	$ (422)	$ 5,149	$ (2,925)
Deferred taxes	141	(2,044)	1,161
Total recognized in other comprehensive income	(281)	3,105	(1,764)
Total recognized in net periodic benefit cost and other comprehensive income	20	2,974	(1,406)
SERP Benefits
Components of net periodic benefit cost and other amounts recognized in Other Comprehensive Income
Service cost	168	132	149
Interest cost	$ 91	$ 88	$ 76
Expected return on plan assets
Amortization of net loss	$ 32
Amortization of unrecognized prior service cost
Amortization of unrecognized transition (asset) obligation	$ 28	$ 28	$ 43
Net periodic benefit cost (credit)	319	248	268
Net (gain) loss	$ (48)	$ 430	$ (193)
Prior service cost
Transition obligation
Amortization of net loss	$ (32)
Amortization of prior service cost
Amortization of transition obligation	$ (27)	$ (27)	$ (43)
Total recognized in other comprehensive income, before tax	(107)	403	(236)
Deferred taxes	33	(160)	93
Total recognized in other comprehensive income	(74)	243	(143)
Total recognized in net periodic benefit cost and other comprehensive income	$ 245	$ 491	$ 125