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