Annual report pursuant to Section 13 and 15(d)

EMPLOYEE BENEFIT PLANS - Contributions (Details)

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EMPLOYEE BENEFIT PLANS - Contributions (Details) - Defined benefit pension plan [Member] - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]    
Actual Contributions $ 5,000 $ 23,000
Expected contribution for 2020 $ 5,000