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Employee Benefit Plans - Schedule of Amounts Recognized in Balance Sheet (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Amounts recognized in the balance sheet consist of:      
Non-current liability $ 15,806 $ 14,757 $ 15,773
Net amount recognized $ 15,806 $ 14,757