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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 |  |

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