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Income Taxes - Summary of Change in Valuation (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Income Tax Disclosure [Abstract]    
Beginning balance $ 14,793 $ 11,364
Charged to costs and expenses 6,281 3,512
Charged to other comprehensive income 258 (83)
Ending balance $ 21,332 $ 14,793