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Other Non-Operating Income (Expense), Net (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Other Non-Operating Income (Expense), Net [Abstract]      
Interest and dividend income $ 49 $ 109 $ 97
Equity income from joint ventures 3,295 820 2,865
Loss on foreign exchange (257) (350) (502)
Other non-operating income, net 407 233 127
Total other non-operating income, net $ 3,494 $ 812 $ 2,587