EMPLOYEE BENEFIT PLANS Table 2 (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Pension Plans (The Pension Plan, Excess Pension Plan and SERP) [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 7,676	$ 8,049
Interest cost	4,389	4,225
Expected return on plan assets	(5,018)	(4,574)
Amortization of prior service credit	(2,063)	(2,063)
Amortization of net actuarial loss	1,845	179
Other	0	(39)
Net periodic benefit cost (income)	6,829	5,777
Other Postretirement Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	470	374
Interest cost	448	373
Expected return on plan assets	0	0
Amortization of prior service credit	(1,145)	(1,145)
Amortization of net actuarial loss	269	114
Other	0	0
Net periodic benefit cost (income)	$ 42	$ (284)