COMPONENTS OF QUARTERLY AND YEAR TO DATE NET PERIODIC BENEFIT COSTS (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Qualified Pension [Member]
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost, benefits earned during the period	$ 271	$ 349	$ 542	$ 699
Interest cost on projected benefit obligation	435	409	870	817
Expected return on plan assets	(793)	(727)	(1,586)	(1,454)
Amortization of unrecognized prior service benefit	2	3	4	7
Amortization of unrecognized net loss	160	391	320	781
Net periodic pension expense	75	425	150	850
Supplemental Pension [Member]
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost, benefits earned during the period	10	10	20	20
Interest cost on projected benefit obligation	13	13	26	24
Amortization of unrecognized net loss	5	9	10	17
Net periodic pension expense	28	32	56	61
Postretirement, Medical and Life [Member]
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost, benefits earned during the period	11	13	22	24
Interest cost on projected benefit obligation	18	17	36	32
Amortization of unrecognized prior service benefit	(24)	(24)	(48)	(49)
Amortization of unrecognized net loss	0	2	0	3
Net periodic pension expense	$ 5	$ 8	$ 10	$ 10