Annual report pursuant to Section 13 and 15(d)

EMPLOYEE BENEFIT PLANS (Details 5)

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EMPLOYEE BENEFIT PLANS (Details 5) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Employee Benefit Plans      
Service cost $ 37 $ 58
Interest cost 4,805 7,926 8,493
Expected return on plan assets (6,149) (13,775) (13,368)
Amortization of net loss 2,396 3,292 3,322
Preliminary net periodic benefit cost/(income) 1,052 (2,520) (1,495)
Settlement expense 46,419 53
Net periodic benefit cost/(income) $ 47,471 $ (2,520) $ (1,442)