Segment Reporting - Balance Sheets (Details) - USD ($) $ in Thousands		Sep. 30, 2023	Jun. 30, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2021
Assets
Total cash and cash equivalents		$ 1,307,770		$ 1,057,030
Restricted cash	[1]	42,487		67,454
Total securities available for sale		795,669		345,702
Loans held for sale at fair value		362,789		110,400
Loans and leases held for investment, net		4,886,782		4,705,302
Loans held for investment at fair value	[1]	326,299		925,938
Retail and certificate loans held for investment at fair value	[1]	18,118		55,425
Property, equipment and software, net		159,768		136,473
Investment in subsidiary		0		0
Goodwill		75,717		75,717
Other assets	[1]	496,952		500,306
Total assets		8,472,351		7,979,747
Liabilities and Equity
Total deposits		7,000,263		6,392,553
Borrowings	[1]	10,717		74,858
Retail notes, certificates and secured borrowings at fair value		18,118		55,425
Other liabilities	[1]	235,034		292,617
Liabilities		7,264,132		6,815,453
Total equity		1,208,219	$ 1,205,523	1,164,294	$ 1,121,410	$ 1,079,117	$ 850,242
Total liabilities and equity		8,472,351		7,979,747
Operating Segments | LendingClub Bank
Assets
Total cash and cash equivalents		1,283,549		1,020,874
Restricted cash		0		0
Total securities available for sale		790,542		329,287
Loans held for sale at fair value		362,789		110,400
Loans and leases held for investment, net		4,886,782		4,705,302
Loans held for investment at fair value		316,622		906,711
Retail and certificate loans held for investment at fair value		0		0
Property, equipment and software, net		139,269		102,274
Investment in subsidiary		0		0
Goodwill		75,717		75,717
Other assets		352,072		339,341
Total assets		8,207,342		7,589,906
Liabilities and Equity
Total deposits		7,074,717		6,420,827
Borrowings		7,361		64,154
Retail notes, certificates and secured borrowings at fair value		0		0
Other liabilities		136,543		189,185
Liabilities		7,218,621		6,674,166
Total equity		988,721		915,740
Total liabilities and equity		8,207,342		7,589,906
Operating Segments | LendingClub Corporation
Assets
Total cash and cash equivalents		93,060		56,475
Restricted cash		48,102		75,409
Total securities available for sale		5,127		16,415
Loans held for sale at fair value		0		0
Loans and leases held for investment, net		0		0
Loans held for investment at fair value		9,677		19,227
Retail and certificate loans held for investment at fair value		18,118		55,425
Property, equipment and software, net		20,499		34,199
Investment in subsidiary		813,436		755,319
Goodwill		0		0
Other assets		162,490		173,851
Total assets		1,170,509		1,186,320
Liabilities and Equity
Total deposits		0		0
Borrowings		3,356		10,704
Retail notes, certificates and secured borrowings at fair value		18,118		55,425
Other liabilities		116,101		116,318
Liabilities		137,575		182,447
Total equity		1,032,934		1,003,873
Total liabilities and equity		1,170,509		1,186,320
Intercompany Eliminations
Assets
Total cash and cash equivalents		(68,839)		(20,319)
Restricted cash		(5,615)		(7,955)
Total securities available for sale		0		0
Loans held for sale at fair value		0		0
Loans and leases held for investment, net		0		0
Loans held for investment at fair value		0		0
Retail and certificate loans held for investment at fair value		0		0
Property, equipment and software, net		0		0
Investment in subsidiary		(813,436)		(755,319)
Goodwill		0		0
Other assets		(17,610)		(12,886)
Total assets		(905,500)		(796,479)
Liabilities and Equity
Total deposits		(74,454)		(28,274)
Borrowings		0		0
Retail notes, certificates and secured borrowings at fair value		0		0
Other liabilities		(17,610)		(12,886)
Liabilities		(92,064)		(41,160)
Total equity		(813,436)		(755,319)
Total liabilities and equity		$ (905,500)		$ (796,479)

[1] Includes amounts in consolidated variable interest entities (VIEs). See “Notes to Condensed Consolidated Financial Statements – Note 6. Securitizations and Variable Interest Entities.”