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Income Taxes - Components of Income Tax Expense (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Principal components on income tax expense:      
Current taxes $ 7,612 $ 4,728 $ 3,889
Deferred taxes (817) 354 632
Income tax expense $ 6,795 $ 5,082 $ 4,521