EMPLOYEE BENEFITS (AOCI) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Unrecognized prior service cost	$ 0	$ 0
Unrecognized actuarial (gain) loss	49,745	52,936
Total amounts recognized in AOCI	49,745	52,936
Anticipated amortization of net actuarial losses in next fiscal year	3,562
Post-retirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Unrecognized prior service cost	(32,289)	0
Unrecognized actuarial (gain) loss	20,756	20,806
Total amounts recognized in AOCI	(11,533)	$ 20,806
Anticipated amortization of net actuarial losses in next fiscal year	$ 1,846