Segment Reporting - Statements of Operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Segment Reporting Information [Line Items]
Marketplace revenue	$ 60,886	$ 173,837	$ 239,303	$ 560,187
Other non-interest income	2,958	7,400	9,349	24,739
Total non-interest income	63,844	181,237	248,652	584,926
Interest income	207,412	143,220	624,311	383,341
Interest expense	(70,407)	(19,544)	(193,950)	(43,759)
Net interest income	137,005	123,676	430,361	339,582
Total net revenue	200,849	304,913	679,013	924,508
Provision for credit losses	(64,479)	(82,739)	(201,658)	(205,814)
Non-interest expense	(128,035)	(186,219)	(436,422)	(586,809)
Income (Loss) before income tax benefit (expense)	8,335	35,955	40,933	131,885
Income tax benefit (expense)	(3,327)	7,243	(12,149)	134,209
Net income	5,008	43,198	28,784	266,094
Capital expenditures	15,984	17,301	48,239	54,659
Depreciation and amortization	11,250	10,681	35,242	32,277
Operating Segments | LendingClub Bank
Segment Reporting Information [Line Items]
Marketplace revenue	37,439	153,504	172,133	509,426
Other non-interest income	18,783	25,240	59,687	64,779
Total non-interest income	56,222	178,744	231,820	574,205
Interest income	203,961	137,142	612,805	357,117
Interest expense	(69,517)	(15,277)	(189,959)	(25,134)
Net interest income	134,444	121,865	422,846	331,983
Total net revenue	190,666	300,609	654,666	906,188
Provision for credit losses	(64,463)	(82,739)	(201,658)	(205,814)
Non-interest expense	(122,142)	(177,714)	(413,088)	(552,809)
Income (Loss) before income tax benefit (expense)	4,061	40,156	39,920	147,565
Income tax benefit (expense)	(2,380)	(9,440)	(12,065)	(39,113)
Net income	1,681	30,716	27,855	108,452
Capital expenditures	15,984	17,301	48,239	54,659
Depreciation and amortization	7,579	4,099	21,546	11,109
Operating Segments | LendingClub Corporation
Segment Reporting Information [Line Items]
Marketplace revenue	12,320	9,015	33,200	35,313
Other non-interest income	2,478	4,794	7,462	12,931
Total non-interest income	14,798	13,809	40,662	48,244
Interest income	3,451	6,078	11,506	26,224
Interest expense	(890)	(4,267)	(3,991)	(18,625)
Net interest income	2,561	1,811	7,515	7,599
Total net revenue	17,359	15,620	48,177	55,843
Provision for credit losses	(16)	0	0	0
Non-interest expense	(13,069)	(19,821)	(47,164)	(71,523)
Income (Loss) before income tax benefit (expense)	4,274	(4,201)	1,013	(15,680)
Income tax benefit (expense)	(947)	16,683	(84)	120,274
Net income	3,327	12,482	929	104,594
Capital expenditures	0	0	0	0
Depreciation and amortization	3,671	6,582	13,696	21,168
Intercompany Eliminations
Segment Reporting Information [Line Items]
Marketplace revenue	11,127	11,318	33,970	15,448
Other non-interest income	(18,303)	(22,634)	(57,800)	(52,971)
Total non-interest income	(7,176)	(11,316)	(23,830)	(37,523)
Interest income	0	0	0	0
Interest expense	0	0	0	0
Net interest income	0	0	0	0
Total net revenue	(7,176)	(11,316)	(23,830)	(37,523)
Provision for credit losses	0	0	0	0
Non-interest expense	7,176	11,316	23,830	37,523
Income (Loss) before income tax benefit (expense)	0	0	0	0
Income tax benefit (expense)	0	0	0	53,048
Net income	0	0	0	53,048
Capital expenditures	0	0	0	0
Depreciation and amortization	$ 0	$ 0	$ 0	$ 0