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COMPREHENSIVE INCOME - Reclassification adjustments out of accumulated other comprehensive loss (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Amortization of defined benefit pension items    
Prior service cost $ 6 $ (62)
Actuarial losses 869 1,074
Total before tax 875 1,012
Tax benefit (228) (264)
Net of tax $ 647 $ 748