Consolidated Statements of Changes in Stockholders' (Equity) Deficit - USD ($) $ in Thousands	Total	Earn-Out Shares Contingent Consideration	Lock-Up Shares Contingent Consideration	Cumulative Effect, Period of Adoption, Adjustment	Cumulative Effect, Period of Adoption, Adjusted Balance	Common Stock	Common Stock Earn-Out Shares Contingent Consideration	Common Stock Lock-Up Shares Contingent Consideration	Common Stock Cumulative Effect, Period of Adoption, Adjustment	Common Stock Cumulative Effect, Period of Adoption, Adjusted Balance	Additional Paid-in Capital	Additional Paid-in Capital Earn-Out Shares Contingent Consideration	Additional Paid-in Capital Lock-Up Shares Contingent Consideration	Additional Paid-in Capital Cumulative Effect, Period of Adoption, Adjustment	Additional Paid-in Capital Cumulative Effect, Period of Adoption, Adjusted Balance	Accumulated Deficit	Accumulated Deficit Cumulative Effect, Period of Adoption, Adjustment	Accumulated Deficit Cumulative Effect, Period of Adoption, Adjusted Balance	Redeemable Convertible Series C Preferred	Redeemable Convertible Series C Preferred Cumulative Effect, Period of Adoption, Adjustment	Redeemable Convertible Series C Preferred Cumulative Effect, Period of Adoption, Adjusted Balance	Common	Common Cumulative Effect, Period of Adoption, Adjustment	Common Cumulative Effect, Period of Adoption, Adjusted Balance	Series A and B Preferred Preferred Stock	Series A and B Preferred Preferred Stock Cumulative Effect, Period of Adoption, Adjustment	Series A and B Preferred Preferred Stock Cumulative Effect, Period of Adoption, Adjusted Balance
Beginning balance, redeemable convertible (in units) at Dec. 31, 2018																			21,906,852	7,628,249	14,278,603	23,885,352	23,885,352	0
Beginning balance, redeemable convertible at Dec. 31, 2018																			$ 141,518		$ 141,518	$ 5,540	$ (5,540)	$ 0
Increase (Decrease) in Temporary Equity [Roll Forward]
Fair value adjustment of redemption option in Open Lending, LLC convertible preferred stock	$ 104,825																		$ 104,825
Ending balance, redeemable convertible (in units) at Sep. 30, 2019																			14,278,603			0
Ending balance, redeemable convertible at Sep. 30, 2019																			$ 246,343			$ 0
Beginning balance (in shares) at Dec. 31, 2018						0			37,631,052	37,631,052															29,058,266	29,058,266	0
Beginning balance at Dec. 31, 2018	(133,792)			$ 32,768	$ (133,792)	$ 0			$ 376	$ 376	$ 0			$ 5,642	$ 5,642	$ (139,810)	$ 32,768	$ (139,810)							$ 478	$ (478)	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Fair value adjustment of redemption option in Open Lending, LLC convertible preferred stock	(104,825)															(104,825)
Distribution to Open Lending, LLC unitholders	(22,824)															(22,824)
Vesting of Open Lending, LLC share-based compensation plan	1,497										1,497
Net income	45,104															45,104
Ending balance (in shares) at Sep. 30, 2019						37,631,052																			0
Ending balance at Sep. 30, 2019	(182,072)					$ 376					7,139					(189,587)									$ 0
Beginning balance, redeemable convertible (in units) at Jun. 30, 2019																			21,906,852	7,628,249	14,278,603	23,885,352	23,885,352	0
Beginning balance, redeemable convertible at Jun. 30, 2019																			$ 187,742		$ 187,742	$ 6,550	$ 6,550	$ 0
Increase (Decrease) in Temporary Equity [Roll Forward]
Fair value adjustment of redemption option in Open Lending, LLC convertible preferred stock																			$ 58,601
Ending balance, redeemable convertible (in units) at Sep. 30, 2019																			14,278,603			0
Ending balance, redeemable convertible at Sep. 30, 2019																			$ 246,343			$ 0
Beginning balance (in shares) at Jun. 30, 2019						0			37,631,052	37,631,052															29,058,266	29,058,266	0
Beginning balance at Jun. 30, 2019	(128,479)				(128,479)	$ 0			$ 376	$ 376	0			6,652	6,652	(135,507)		(135,507)							$ 478	$ 478	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Fair value adjustment of redemption option in Open Lending, LLC convertible preferred stock	(58,601)															(58,601)
Distribution to Open Lending, LLC unitholders	(10,195)															(10,195)
Vesting of Open Lending, LLC share-based compensation plan	487										487
Net income	14,716															14,716
Ending balance (in shares) at Sep. 30, 2019						37,631,052																			0
Ending balance at Sep. 30, 2019	(182,072)					$ 376					7,139					(189,587)									$ 0
Beginning balance, redeemable convertible (in units) at Dec. 31, 2019																			21,906,852	7,628,249	14,278,603	25,381,873	25,381,873	0
Beginning balance, redeemable convertible at Dec. 31, 2019																			$ 304,943		$ 304,943	$ 7,524	$ 7,524	$ 0
Increase (Decrease) in Temporary Equity [Roll Forward]
Fair value adjustment of redemption option in Open Lending, LLC convertible preferred stock	(47,537)																		$ (47,537)
Recapitalization transaction, net of transaction costs, redeemable convertible (in units)																			(14,278,603)
Recapitalization transaction, net of transaction costs																			$ (257,406)
Ending balance, redeemable convertible (in units) at Sep. 30, 2020																			0			0
Ending balance, redeemable convertible at Sep. 30, 2020																			$ 0			$ 0
Beginning balance (in shares) at Dec. 31, 2019						0			37,631,052	37,631,052															29,058,266	29,058,266	0
Beginning balance at Dec. 31, 2019	(234,779)				$ (234,779)	$ 0			$ 376	$ 376	0			$ 7,626	$ 7,626	(242,781)		$ (242,781)							$ 478	$ 478	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Fair value adjustment of redemption option in Open Lending, LLC convertible preferred stock	47,537															47,537
Distribution to Open Lending, LLC unitholders	(135,380)															(135,380)
Recapitalization transaction, net of transaction costs (in shares)						54,218,857
Recapitalization transaction, net of transaction costs	242,543					$ 542					242,001
Deferred tax asset	1,874										1,874
Estimated fair value of contingent consideration at June 10, 2020	(347,089)										(347,089)
Vesting of Open Lending, LLC share-based compensation plan	2,676										2,676
Stock warrant exercise (in shares)						7,882,163
Stock warrant exercise	90,645					$ 79					90,566
Stock issued during period, acquisitions (in shares)							23,750,000	3,437,500
Stock issued during period, acquisitions		$ 419,844	$ 59,177				$ 238	$ 34				$ 419,606	$ 59,143
Net income	(112,766)															(112,766)
Ending balance (in shares) at Sep. 30, 2020						126,919,572																			0
Ending balance at Sep. 30, 2020	34,282					$ 1,269					476,403					(443,390)									$ 0
Beginning balance, redeemable convertible (in units) at Jun. 30, 2020																			0			0
Beginning balance, redeemable convertible at Jun. 30, 2020																			$ 0			$ 0
Ending balance, redeemable convertible (in units) at Sep. 30, 2020																			0			0
Ending balance, redeemable convertible at Sep. 30, 2020																			$ 0			$ 0
Beginning balance (in shares) at Jun. 30, 2020						91,849,909																			0
Beginning balance at Jun. 30, 2020	(464,251)					$ 918					(92,912)					(372,257)									$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock warrant exercise (in shares)						7,882,163
Stock warrant exercise	90,645					$ 79					90,566
Stock issued during period, acquisitions (in shares)							23,750,000	3,437,500
Stock issued during period, acquisitions		$ 419,844	$ 59,177				$ 238	$ 34				$ 419,606
Net income	(71,133)															(71,133)
Ending balance (in shares) at Sep. 30, 2020						126,919,572																			0
Ending balance at Sep. 30, 2020	$ 34,282					$ 1,269					$ 476,403					$ (443,390)									$ 0