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Income Taxes Tax Holiday (Details) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Income Tax Holiday [Line Items]    
Income Tax Holiday, Aggregate Dollar Amount $ 9.8 $ 8.0
Income Tax Holiday, Income Tax Benefits Per Share $ 0.45 $ 0.37