Segment Reporting - Statements of Operations (Details) - USD ($) $ in Thousands		8 Months Ended	12 Months Ended
		Sep. 30, 2021	Dec. 31, 2021		Dec. 31, 2020		Dec. 31, 2019
Segment Reporting Information [Line Items]
Marketplace revenue			$ 578,580	[1]	$ 245,314	[1]	$ 646,735
Other non-interest income			27,219	[1]	13,442	[1]	13,831
Total non-interest income			605,799	[1]	258,756	[1]	660,566
Total interest income			292,832	[1]	209,694	[1]	345,345
Interest expense			(80,001)	[1]	(150,366)	[1]	(247,304)
Net interest income and fair value adjustments			212,831	[1]	59,328	[1]	98,041
Total net revenue			818,630	[1]	318,084	[1]	758,607
Reversal of (provision for) credit losses	[2]		(138,800)	[1]	(3,382)	[1]	0
Non-interest expense			(661,386)	[1]	(502,319)	[1]	(789,498)
Income (Loss) before income tax benefit			18,444		(187,617)		(30,891)
Income tax benefit (expense)			136		79		201
Consolidated net income (loss)	[2]		18,580		(187,538)		(30,690)
Capital expenditures			34,413		31,147		50,668
Depreciation and amortization	[1]		44,285		54,030		59,152
Operating Segments | LendingClub Bank
Segment Reporting Information [Line Items]
Marketplace revenue		$ 462,821
Other non-interest income		94,953
Total non-interest income		557,774
Total interest income		210,739
Interest expense		(8,412)
Net interest income and fair value adjustments		202,327
Total net revenue		760,101
Reversal of (provision for) credit losses		(142,182)
Non-interest expense		(547,799)
Income (Loss) before income tax benefit		70,120
Income tax benefit (expense)		9,171
Consolidated net income (loss)		79,291
Capital expenditures		32,602
Depreciation and amortization		$ 4,569
Operating Segments | LendingClub Corporation (Parent only)
Segment Reporting Information [Line Items]
Marketplace revenue			115,759		245,314		646,735	[1]
Other non-interest income			16,718		13,442		13,831	[1]
Total non-interest income			132,477		258,756		660,566	[1]
Total interest income			82,093		209,694		345,345	[1]
Interest expense			(71,589)		(150,366)		(247,304)
Net interest income and fair value adjustments			10,504		59,328		98,041	[1]
Total net revenue			142,981		318,084		758,607	[1]
Reversal of (provision for) credit losses			3,382		(3,382)		0	[1]
Non-interest expense			(198,039)		(502,319)		(789,498)
Income (Loss) before income tax benefit			(51,676)		(187,617)		(30,891)
Income tax benefit (expense)			44,013		79		201
Consolidated net income (loss)			(7,663)		(187,538)		(30,690)
Capital expenditures			1,811		31,147		50,668
Depreciation and amortization			39,716		$ 54,030		$ 59,152
Intercompany Eliminations
Segment Reporting Information [Line Items]
Marketplace revenue			0
Other non-interest income			(84,452)
Total non-interest income			(84,452)
Total interest income			0
Interest expense			0
Net interest income and fair value adjustments			0
Total net revenue			(84,452)
Reversal of (provision for) credit losses			0
Non-interest expense			84,452
Income (Loss) before income tax benefit			0
Income tax benefit (expense)			(53,048)
Consolidated net income (loss)			(53,048)
Capital expenditures			0
Depreciation and amortization			$ 0

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