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Equity Investments (Details) - USD ($)
$ in Thousands
1 Months Ended
Dec. 31, 2016
Dec. 31, 2020
Dec. 31, 2019
Dec. 01, 2016
Schedule of Equity Method Investments [Line Items]        
Equity Method Investment, Ownership Percentage       25.00%
Payments to Acquire Equity Method Investments $ 2,500      
Equity investment (see Note 1)   $ 2,466 $ 2,480