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Description of Business and Summary of Significant Accounting Policies - Property, Equipment and Software, Intangible Asset Impairment, Advanced Funding (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2022 | Sep. 30, 2022 | Sep. 30, 2022 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Goodwill impairment loss | $ 4,300 | $ 39,400 |  | $ 43,758 | $ 0 | $ 0
Impairment loss on intangible assets and goodwill | $ 4,329 | $ 57,057 | $ 57,057 | 61,386 |  |
Impairment of Intangible Assets, Finite-Lived |  |  |  | $ 17,700 |  |
Impairment, Intangible Asset, Finite-Lived, Statement of Income or Comprehensive Income [Extensible Enumeration] |  |  |  | Impairment loss on intangible assets and goodwill |  |
Impairment, Long-Lived Asset, Held-for-Use |  |  |  | $ 600 | $ 600 | $ 600
Impairment, Long-Lived Asset, Held-for-Use, Statement of Income or Comprehensive Income [Extensible Enumeration] |  |  |  | Product and Technology Expense |  |
Insurance |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Impairment loss on intangible assets and goodwill |  |  |  | $ 43,700 |  |
Software and computer equipment |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Property, Plant and Equipment, Useful Life |  |  |  | 3 years |  |
Internally developed software |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Property, Plant and Equipment, Useful Life |  |  |  | 2 years |  |
Minimum |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Weighted average cost of capital for impairment test |  |  |  | 17.00% |  |
Minimum | Furniture, office equipment and other |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Property, Plant and Equipment, Useful Life |  |  |  | 3 years |  |
Maximum |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Weighted average cost of capital for impairment test |  |  |  | 20.00% |  |
Maximum | Furniture, office equipment and other |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Property, Plant and Equipment, Useful Life |  |  |  | 5 years |  |

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