COMPONENTS OF QUARTERLY AND YEAR TO DATE NET PERIODIC BENEFIT COSTS (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Qualified Pension [Member]
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost, benefits earned during the period	$ 271	$ 349	$ 813	$ 1,048
Interest cost on projected benefit obligation	435	409	1,305	1,226
Expected return on plan assets	(793)	(727)	(2,379)	(2,181)
Amortization of unrecognized prior service benefit	2	3	6	10
Amortization of unrecognized net loss	160	391	480	1,172
Net periodic pension expense	75	425	225	1,275
Supplemental Pension [Member]
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost, benefits earned during the period	10	10	30	30
Interest cost on projected benefit obligation	14	12	40	36
Amortization of unrecognized net loss	9	9	19	26
Net periodic pension expense	33	31	89	92
Postretirement, Medical and Life [Member]
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost, benefits earned during the period	11	12	33	36
Interest cost on projected benefit obligation	18	16	54	48
Amortization of unrecognized prior service benefit	(24)	(24)	(72)	(73)
Amortization of unrecognized net loss	0	1	0	4
Net periodic pension expense	$ 5	$ 5	$ 15	$ 15