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PENSION PLANS (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Pension Plan
   
Components of net periodic benefit cost    
Interest cost $ 366 $ 348
Expected return on assets (524) (470)
Amortization of net actuarial losses 304 599
Net periodic cost 146 477
SERPs
   
Components of net periodic benefit cost    
Interest cost 113 103
Amortization of net transition obligation 4 4
Amortization of prior service cost 5 5
Amortization of net actuarial losses 1 18
Net periodic cost $ 123 $ 130