Segment Reporting - Statements of Operations (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Segment Reporting Information [Line Items]
Marketplace revenue	$ 82,783	$ 206,384	$ 178,417	$ 386,350
Other non-interest income	3,035	7,448	6,391	17,339
Total non-interest income	85,818	213,832	184,808	403,689
Interest income	214,486	128,468	416,899	240,121
Interest expense	(67,834)	(12,242)	(123,543)	(24,215)
Net interest income	146,652	116,226	293,356	215,906
Total net revenue	232,470	330,058	478,164	619,595
Provision for credit losses	(66,595)	(70,566)	(137,179)	(123,075)
Non-interest expense	(151,079)	(209,386)	(308,387)	(400,590)
Income before income tax benefit (expense)	14,796	50,106	32,598	95,930
Income tax benefit (expense)	(4,686)	131,954	(8,822)	126,966
Net income	10,110	182,060	23,776	222,896
Capital expenditures	15,857	15,783	32,255	37,358
Depreciation and amortization	11,638	10,557	23,992	21,596
Operating Segments | LendingClub Bank
Segment Reporting Information [Line Items]
Marketplace revenue	62,006	191,087	134,694	355,922
Other non-interest income	21,743	20,041	40,904	39,539
Total non-interest income	83,749	211,128	175,598	395,461
Interest income	210,514	120,152	408,844	219,975
Interest expense	(66,546)	(6,213)	(120,442)	(9,857)
Net interest income	143,968	113,939	288,402	210,118
Total net revenue	227,717	325,067	464,000	605,579
Provision for credit losses	(66,611)	(70,566)	(137,195)	(123,075)
Non-interest expense	(142,563)	(196,636)	(290,946)	(375,095)
Income before income tax benefit (expense)	18,543	57,865	35,859	107,409
Income tax benefit (expense)	(5,429)	(17,318)	(9,685)	(29,673)
Net income	13,114	40,547	26,174	77,736
Capital expenditures	15,857	15,783	32,255	37,358
Depreciation and amortization	7,073	3,510	13,967	7,010
Operating Segments | LendingClub Corporation
Segment Reporting Information [Line Items]
Marketplace revenue	7,772	11,167	20,880	26,298
Other non-interest income	2,431	3,914	4,984	8,137
Total non-interest income	10,203	15,081	25,864	34,435
Interest income	3,972	8,316	8,055	20,146
Interest expense	(1,288)	(6,029)	(3,101)	(14,358)
Net interest income	2,684	2,287	4,954	5,788
Total net revenue	12,887	17,368	30,818	40,223
Provision for credit losses	16	0	16	0
Non-interest expense	(16,650)	(25,127)	(34,095)	(51,702)
Income before income tax benefit (expense)	(3,747)	(7,759)	(3,261)	(11,479)
Income tax benefit (expense)	743	85,864	863	103,591
Net income	(3,004)	78,105	(2,398)	92,112
Capital expenditures	0	0	0	0
Depreciation and amortization	4,565	7,047	10,025	14,586
Intercompany Eliminations
Segment Reporting Information [Line Items]
Marketplace revenue	13,005	4,130	22,843	4,130
Other non-interest income	(21,139)	(16,507)	(39,497)	(30,337)
Total non-interest income	(8,134)	(12,377)	(16,654)	(26,207)
Interest income	0	0	0	0
Interest expense	0	0	0	0
Net interest income	0	0	0	0
Total net revenue	(8,134)	(12,377)	(16,654)	(26,207)
Provision for credit losses	0	0	0	0
Non-interest expense	8,134	12,377	16,654	26,207
Income before income tax benefit (expense)	0	0	0	0
Income tax benefit (expense)	0	63,408	0	53,048
Net income	0	63,408	0	53,048
Capital expenditures	0	0	0	0
Depreciation and amortization	$ 0	$ 0	$ 0	$ 0