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EMPLOYEE BENEFIT PLANS - Amounts not recognized as components of net periodic pension cost (Details) - Defined Benefit Pension Items - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Amounts recognized in accumulated other comprehensive loss consists of:    
Net actuarial loss $ 9,319 $ 20,628
Total $ 9,319 $ 20,628