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COMPONENTS OF QUARTERLY AND YEAR TO DATE NET PERIODIC BENEFIT COSTS (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Qualified Pension [Member]
    
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]    
Service cost, benefits earned during the period $ 271 $ 349
Interest cost on projected benefit obligation 435 409
Expected return on plan assets (793) (727)
Amortization of unrecognized transition obligation 0 0
Amortization of unrecognized prior service benefit 2 3
Amortization of unrecognized net loss 160 380
Net periodic pension expense 75 414
Supplemental Pension [Member]
    
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]    
Service cost, benefits earned during the period 10 10
Interest cost on projected benefit obligation 13 11
Expected return on plan assets 0 0
Amortization of unrecognized prior service benefit 0 0
Amortization of unrecognized net loss 5 8
Net periodic pension expense 28 29
Postretirement, Medical and Life [Member]
    
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]    
Service cost, benefits earned during the period 11 11
Interest cost on projected benefit obligation 18 15
Expected return on plan assets 0 0
Amortization of unrecognized prior service benefit (24) (24)
Amortization of unrecognized net loss 0 1
Net periodic pension expense $ 5 $ 3