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EMPLOYEE BENEFITS (Details) - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Pension Benefits        
Employee benefits        
Employer contribution to the plan     $ 1,000,000  
Components of net periodic benefit cost and other amounts recognized in Other Comprehensive Income        
Service cost $ 286,000 $ 229,000 848,000 $ 681,000
Interest cost 178,000 161,000 529,000 479,000
Expected return on plan assets (463,000) (411,000) (1,375,000) (1,219,000)
Amortization of net loss 95,000 7,000 281,000 20,000
Amortization of unrecognized prior service cost $ (19,000) $ (19,000) $ (58,000) $ (58,000)
Amortization of unrecognized transition obligation
Net periodic benefit cost (credit) $ 77,000 $ (33,000) $ 225,000 $ (97,000)
SERP Benefits        
Employee benefits        
Distribution from the Plan received by a retired executive     84,000  
Components of net periodic benefit cost and other amounts recognized in Other Comprehensive Income        
Service cost 42,000 33,000 126,000 98,000
Interest cost $ 23,000 $ 22,000 $ 68,000 $ 66,000
Expected return on plan assets
Amortization of net loss $ 8,000 $ 24,000
Amortization of unrecognized prior service cost
Amortization of unrecognized transition obligation $ 7,000 $ 7,000 $ 21,000 $ 21,000
Net periodic benefit cost (credit) $ 80,000 $ 62,000 $ 239,000 $ 185,000