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Income Taxes - Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Operating Loss Carryforwards [Line Items]      
Additions based on tax positions related to prior years $ 0    
Provision for income taxes 6,914 $ 8,509 $ 6,620
California      
Operating Loss Carryforwards [Line Items]      
Operating loss carryforwards 7,692    
Federal      
Operating Loss Carryforwards [Line Items]      
Operating loss carryforwards $ 7,093