Quarterly report pursuant to Section 13 or 15(d)

PENSION BENEFITS - Net periodic benefit costs reflected in the Company's Financial Statements (Details)

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PENSION BENEFITS - Net periodic benefit costs reflected in the Company's Financial Statements (Details) - Pension Plan - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Defined Benefit Plan Disclosure    
Net periodic benefit cost $ (115) $ 105
Selling, general and administrative expense    
Defined Benefit Plan Disclosure    
Net periodic benefit cost 16 14
Other income, net    
Defined Benefit Plan Disclosure    
Net periodic benefit cost $ (131) $ 91