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Income Taxes - Loss Carryforwards and Other (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Operating loss carryforwards |  |  |
Net deferred tax assets | $ 61,557 | $ 31,647 |
Reconciliation of the beginning and ending amount of unrecognized tax benefits, excluding accrued interest and penalties |  |  |
Balance at beginning of year | 2,966 | 8,929 | $ 240
Additions based on tax positions related to current year |  |  | 8,689
Additions based on tax positions related to prior years | 7,473 | 2,726 |
Reductions for tax positions related to prior years | (240) | (8,689) |
Reductions for settlements with tax authorities |  |  |
Balance at end of year | 10,199 | 2,966 | 8,929
Interest and penalties accrued | 0 | $ 600 | $ 700
State |  |  |
Operating loss carryforwards |  |  |
Future tax benefits | 2,800 |  |
Net operating loss carryforwards | 47,000 |  |
Increase in valuation allowance | 400 |  |
Net deferred tax assets | 2,400 |  |
Maximum |  |  |
Reconciliation of the beginning and ending amount of unrecognized tax benefits, excluding accrued interest and penalties |  |  |
Decrease in unrecognized tax benefits | $ 10,200 |  |

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