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PENSION AND SUPPLEMENTAL EXECUTIVE RETIREMENT PLANS (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
Pension Plan
       
Components of net periodic benefit cost        
Interest cost $ 366 $ 348 $ 732 $ 696
Expected return on assets (524) (470) (1,048) (940)
Amortization of net actuarial losses 304 599 608 1,198
Net periodic cost 146 477 292 954
SERPs
       
Components of net periodic benefit cost        
Interest cost 113 103 226 206
Amortization of net transition obligation 4 4 8 8
Amortization of prior service cost 5 5 10 10
Amortization of net actuarial losses 1 18 2 36
Net periodic cost $ 123 $ 130 $ 246 $ 260