Quarterly report pursuant to Section 13 or 15(d)

PENSION BENEFITS - Components of net periodic benefit (credit) expense (Details)

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PENSION BENEFITS - Components of net periodic benefit (credit) expense (Details) - Pension Plan - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2020
Sep. 30, 2019
Jun. 25, 2020
Sep. 30, 2019
Defined Benefit Plan Disclosure          
Service cost $ 0 $ 0 $ 152 $ 0 $ 456
Interest cost 210 210 275 452 841
Expected return on plan assets (392) (392) (365) (818) (1,096)
Recognized actuarial loss 0 0 276 108 828
Amortization of prior service cost 0 0 21 0 63
Net periodic benefit (credit) cost $ (182) $ (182) $ 359 $ (258) $ 1,092