Segment Reporting - Statements of Operations (Details) - USD ($) $ in Thousands	3 Months Ended		8 Months Ended	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Segment Reporting Information [Line Items]
Marketplace revenue	$ 173,837	$ 174,556		$ 560,187	$ 408,018
Other non-interest income	7,400	6,322		24,739	18,670
Total non-interest income	181,237	180,878		584,926	426,688
Interest income	143,220	82,860		383,341	195,177
Interest expense	(19,544)	(17,572)		(43,759)	(65,478)
Net interest income	123,676	65,288		339,582	129,699
Total net revenue	304,913	246,166		924,508	556,387
(Provision for) reversal of credit losses	(82,739)	(37,524)		(205,814)	(93,651)
Non-interest expense	(186,219)	(178,775)		(586,809)	(473,166)
Income (Loss) before income tax benefit (expense)	35,955	29,867		131,885	(10,430)
Income tax benefit (expense)	7,243	(2,682)		134,209	(98)
Net income (loss)	43,198	27,185		266,094	(10,528)	$ (160,883)
Capital expenditures	17,301	9,451		54,659	24,435
Depreciation and amortization	10,681	10,549		32,277	33,823
Operating Segments | LendingClub Bank
Segment Reporting Information [Line Items]
Marketplace revenue	153,504	151,109	$ 315,885	509,426
Other non-interest income	25,240	25,393	73,433	64,779
Total non-interest income	178,744	176,502	389,318	574,205
Interest income	137,142	64,606	127,429	357,117
Interest expense	(15,277)	(2,270)	(5,489)	(25,134)
Net interest income	121,865	62,336	121,940	331,983
Total net revenue	300,609	238,838	511,258	906,188
(Provision for) reversal of credit losses	(82,739)	(38,019)	(96,938)	(205,814)
Non-interest expense	(177,714)	(161,101)	(374,782)	(552,809)
Income (Loss) before income tax benefit (expense)	40,156	39,718	39,538	147,565
Income tax benefit (expense)	(9,440)	(4,670)	7,866	(39,113)
Net income (loss)	30,716	35,048	47,404	108,452
Capital expenditures	17,301	9,451	22,624	54,659
Depreciation and amortization	4,099	1,220	2,810	11,109
Operating Segments | LendingClub Corporation
Segment Reporting Information [Line Items]
Marketplace revenue	9,015	23,447		35,313	92,133
Other non-interest income	4,794	4,140		12,931	12,519
Total non-interest income	13,809	27,587		48,244	104,652
Interest income	6,078	18,254		26,224	67,748
Interest expense	(4,267)	(15,302)		(18,625)	(59,989)
Net interest income	1,811	2,952		7,599	7,759
Total net revenue	15,620	30,539		55,843	112,411
(Provision for) reversal of credit losses	0	495		0	3,287
Non-interest expense	(19,821)	(40,885)		(71,523)	(165,666)
Income (Loss) before income tax benefit (expense)	(4,201)	(9,851)		(15,680)	(49,968)
Income tax benefit (expense)	16,683	12,607		120,274	23,821
Net income (loss)	12,482	2,756		104,594	(26,147)
Capital expenditures	0	0		0	1,811
Depreciation and amortization	6,582	9,329		21,168	$ 31,013
Intercompany Eliminations
Segment Reporting Information [Line Items]
Marketplace revenue	11,318	0	0	15,448
Other non-interest income	(22,634)	(23,211)	(67,282)	(52,971)
Total non-interest income	(11,316)	(23,211)	(67,282)	(37,523)
Interest income	0	0	0	0
Interest expense	0	0	0	0
Net interest income	0	0	0	0
Total net revenue	(11,316)	(23,211)	(67,282)	(37,523)
(Provision for) reversal of credit losses	0	0	0	0
Non-interest expense	11,316	23,211	67,282	37,523
Income (Loss) before income tax benefit (expense)	0	0	0	0
Income tax benefit (expense)	0	(10,619)	(31,785)	53,048
Net income (loss)	0	(10,619)	(31,785)	53,048
Capital expenditures	0	0	0	0
Depreciation and amortization	$ 0	$ 0	$ 0	$ 0