Business Acquisitions - Summary of Balance Sheet Reclassification Adjustments (Details) - USD ($) $ in Thousands		Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019
Assets
Total cash and cash equivalents				$ 0
Cash and due from banks		$ 55,773		5,197
Interest-bearing deposits in banks		512,873		519,766
Total cash and cash equivalents		568,646		524,963
Restricted cash	[1]	123,896		103,522
Fair Value		277,505		142,226
Other loans held for investment at fair value				0
Other loans held for investment at fair value				0
Loans held for sale by the Company at fair value				0
Loans held for sale at fair value		180,061		121,902
Retail and certificate loans held for investment at fair value	[1]	391,362		636,686
Other loans held for investment at fair value	[1]	34,523		49,954
Accrued interest receivable				0
Property, equipment and software, net		94,676		96,641
Operating lease assets		82,612		0
Intangible assets, net		23,861		0
Other Assets	[1]	278,403		187,399
Total assets		4,370,101		1,863,293
Liabilities and Equity
Accounts payable		7,892		0
Accrued interest payable				0
Present value of future minimum lease payments		99,492		0
Accrued expenses and other liabilities				0
Payable to investors		30,475		0
Credit facilities and securities sold under repurchase agreements				0
Retail notes, certificates and secured borrowings at fair value		68,781		104,989
Retail notes, certificates and secured borrowings at fair value	[1]	391,384		636,774
Payable on Structured Program borrowings	[1]	110,871		152,808
Other liabilities	[1]	285,871		244,551
Total liabilities		3,607,742		1,139,122
Equity
Common stock		986		881
Additional paid-in capital		1,580,518		1,508,020
Accumulated deficit		(823,927)		(786,214)
Accumulated other comprehensive income		4,874		1,484
Total equity		762,359	$ 733,135	724,171	$ 746,142	$ 796,546	$ 900,187
Total liabilities and equity		$ 4,370,101		1,863,293
LendingClub Historical Presentation
Assets
Total cash and cash equivalents				524,963
Cash and due from banks				0
Interest-bearing deposits in banks				0
Total cash and cash equivalents				0
Restricted cash				103,522
Fair Value				142,226
Other loans held for investment at fair value				636,686
Other loans held for investment at fair value				49,954
Loans held for sale by the Company at fair value				121,902
Loans held for sale at fair value				0
Retail and certificate loans held for investment at fair value				0
Other loans held for investment at fair value				0
Accrued interest receivable				5,205
Property, equipment and software, net				96,641
Operating lease assets				74,037
Intangible assets, net				11,427
Other Assets				96,730
Total assets				1,863,293
Liabilities and Equity
Accounts payable				3,698
Accrued interest payable				4,572
Present value of future minimum lease payments				94,538
Accrued expenses and other liabilities				101,457
Payable to investors				40,286
Credit facilities and securities sold under repurchase agreements				104,989
Retail notes, certificates and secured borrowings at fair value				0
Retail notes, certificates and secured borrowings at fair value				636,774
Payable on Structured Program borrowings				152,808
Other liabilities				0
Total liabilities				1,139,122
Equity
Common stock				881
Additional paid-in capital				1,508,020
Accumulated deficit				(786,214)
Accumulated other comprehensive income				1,484
Total equity				724,171
Total liabilities and equity				1,863,293
Reclassification Adjustments
Assets
Total cash and cash equivalents				(524,963)
Cash and due from banks				5,197
Interest-bearing deposits in banks				519,766
Total cash and cash equivalents				524,963
Restricted cash				0
Fair Value				0
Other loans held for investment at fair value				(636,686)
Other loans held for investment at fair value				(49,954)
Loans held for sale by the Company at fair value				(121,902)
Loans held for sale at fair value				121,902
Retail and certificate loans held for investment at fair value				636,686
Other loans held for investment at fair value				49,954
Accrued interest receivable				(5,205)
Property, equipment and software, net				0
Operating lease assets				(74,037)
Intangible assets, net				(11,427)
Other Assets				90,669
Total assets				0
Liabilities and Equity
Accounts payable				(3,698)
Accrued interest payable				(4,572)
Present value of future minimum lease payments				(94,538)
Accrued expenses and other liabilities				(101,457)
Payable to investors				(40,286)
Credit facilities and securities sold under repurchase agreements				(104,989)
Retail notes, certificates and secured borrowings at fair value				104,989
Retail notes, certificates and secured borrowings at fair value				0
Payable on Structured Program borrowings				0
Other liabilities				244,551
Total liabilities				0
Equity
Common stock				0
Additional paid-in capital				0
Accumulated deficit				0
Accumulated other comprehensive income				0
Total equity				0
Total liabilities and equity				$ 0

[1] Includes amounts in consolidated variable interest entities (VIEs) presented separately in the table below.