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EMPLOYEE BENEFIT PLAN (Tables)
9 Months Ended
Sep. 30, 2017
EMPLOYEE BENEFIT PLAN  
Schedule of net periodic benefit cost and related components
   

Three months ended

September 30

   

Nine months ended

September 30

 
(in thousands)   2017     2016     2017     2016  
Interest cost   $ 483     $ 502     $ 1,449     $ 1,505  
Expected return on plan assets     (589 )     (533 )     (1,767 )     (1,599 )
Amortization of net losses     213       200       638       599  
Net periodic benefit cost   $ 107     $ 169     $ 320     $ 505  
Schedule of trading gains (losses) related to SERP assets
   

Three months ended

September 30

   

Nine months ended

September 30

 
(in thousands)   2017     2016     2017     2016  
Trading gains (losses), net   $ 428     $ 977     $ 1,981     $ 713