Segment Reporting - Statements of Operations (Details) - USD ($) $ in Thousands		3 Months Ended		8 Months Ended		9 Months Ended
		Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021		Sep. 30, 2020
Segment Reporting Information [Line Items]
Marketplace revenue	[1]	$ 174,556	$ 54,635			$ 408,018		$ 175,993
Other non-interest income	[1]	6,322	3,115			18,670		10,166
Total non-interest income	[1]	180,878	57,750			426,688		186,159
Interest income	[1]	82,860	46,773			195,177		176,744
Interest expense	[1]	(17,572)	(33,479)			(65,478)		(120,315)
Net interest income	[1]	65,288	13,294			129,699		56,429
Total net revenue	[1]	246,166	71,044			556,387		242,588
Reversal of (provision for) credit losses	[1]	(37,524)	3,669			(93,651)	[2]	(3,800)	[2]
Non-interest expense	[1]	(178,775)	(109,112)			(473,166)		(399,426)
Income (Loss) before income tax expense		29,867	(34,399)			(10,430)		(160,638)
Income tax benefit		(2,682)	74			(98)		(245)
Consolidated net income (loss)		27,185	(34,325)			(10,528)	[2]	(160,883)	[2]
Capital expenditures		9,451	5,000			24,435		24,583
Depreciation and amortization	[1]	10,549	12,348			33,823		41,832
Operating Segments | LendingClub Bank
Segment Reporting Information [Line Items]
Marketplace revenue		151,109	0	$ 315,885	$ 0
Other non-interest income		25,393	0	73,433	0
Total non-interest income		176,502	0	389,318	0
Interest income		64,606	0	127,429	0
Interest expense		(2,270)	0	(5,489)	0
Net interest income		62,336	0	121,940	0
Total net revenue		238,838	0	511,258	0
Reversal of (provision for) credit losses		(38,019)	0	(96,938)	0
Non-interest expense		(161,101)	0	(374,782)	0
Income (Loss) before income tax expense		39,718	0	39,538	0
Income tax benefit		(4,670)	0	7,866	0
Consolidated net income (loss)		35,048	0	47,404	0
Capital expenditures		9,451	0	22,624	0
Depreciation and amortization		1,220	0	$ 2,810	$ 0
Operating Segments | LendingClub Corporation
Segment Reporting Information [Line Items]
Marketplace revenue		23,447	54,635			92,133		175,993
Other non-interest income		4,140	3,115			12,519		10,166
Total non-interest income		27,587	57,750			104,652		186,159
Interest income		18,254	46,773			67,748		176,744
Interest expense		(15,302)	(33,479)			(59,989)		(120,315)
Net interest income		2,952	13,294			7,759		56,429
Total net revenue		30,539	71,044			112,411		242,588
Reversal of (provision for) credit losses		495	3,669			3,287		(3,800)
Non-interest expense		(40,885)	(109,112)			(165,666)		(399,426)
Income (Loss) before income tax expense		(9,851)	(34,399)			(49,968)		(160,638)
Income tax benefit		12,607	74			23,821		(245)
Consolidated net income (loss)		2,756	(34,325)			(26,147)		(160,883)
Capital expenditures		0	5,000			1,811		24,583
Depreciation and amortization		9,329	12,348			31,013		41,832
Intercompany Eliminations
Segment Reporting Information [Line Items]
Marketplace revenue		0	0			0		0
Other non-interest income		(23,211)	0			(67,282)		0
Total non-interest income		(23,211)	0			(67,282)		0
Interest income		0	0			0		0
Interest expense		0	0			0		0
Net interest income		0	0			0		0
Total net revenue		(23,211)	0			(67,282)		0
Reversal of (provision for) credit losses		0	0			0		0
Non-interest expense		23,211	0			67,282		0
Income (Loss) before income tax expense		0	0			0		0
Income tax benefit		(10,619)	0			(31,785)		0
Consolidated net income (loss)		(10,619)	0			(31,785)		0
Capital expenditures		0	0			0		0
Depreciation and amortization		$ 0	$ 0			$ 0		$ 0

[1] Prior period amounts have been reclassified to conform to the current period presentation. See “Notes to Condensed Consolidated Financial Statements – Note 1. Summary of Significant Accounting Policies” for additional information.

[2] Prior period amounts have been reclassified to conform to the current period presentation. See “Notes to Condensed Consolidated Financial Statements – Note 1. Summary of Significant Accounting Policies” for additional information.