Business Acquisition - Summary of Income Statement Reclassification Adjustments (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2021		Dec. 31, 2020		Dec. 31, 2019
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Net fair value adjustments	[1]	$ 3,986		$ (105,002)		$ (144,273)
Net interest income and fair value adjustments		212,831	[2]	59,328	[2]	98,041
Gain on sales of loans		70,116		30,812		67,716
Non-interest income
Marketplace revenue		578,580	[2]	245,314	[2]	646,735
Other non-interest income		27,219	[2]	13,442	[2]	13,831
Total non-interest income		605,799	[2]	258,756	[2]	660,566
Interest income
Interest on loans held for sale	[2]	29,540		72,876		109,493
Interest on retail and certificate loans held for investment at fair value	[2]	57,684		115,952		214,395
Interest on other loans held for investment at fair value	[2]	4,436		7,688		1,104
Interest on securities available for sale	[2]	11,025		12,125		14,351
Other interest income	[2]	1,170		1,053		6,002
Total interest income		292,832	[2]	209,694	[2]	345,345
Interest expense
Interest on short-term borrowings	[2]	3,677		17,837		26,826
Interest on retail notes, certificates and secured borrowings	[2]	57,684		115,952		214,395
Interest on Structured Program borrowings	[2]	9,638		16,204		5,070
Interest on other long-term debt	[2]	1,774		373		1,013
Total interest expense		80,001	[2]	150,366	[2]	247,304
Total net revenue		818,630	[2]	318,084	[2]	758,607
Provision for credit losses	[1]	138,800	[2]	3,382	[2]	0
Non-interest expense
Compensation and benefits	[2]	288,390		252,517		333,628
Marketing	[2]	156,142		51,518		235,337
Equipment and software	[2]	39,490		26,842		24,927
Occupancy	[2]	24,249		27,870		29,367
Depreciation and amortization	[2]	44,285		54,030		59,152
Professional services	[2]	47,572		41,780		43,010
Other non-interest expense	[2]	61,258		47,762		64,077
Total non-interest expense		661,386	[2]	502,319	[2]	789,498
Income tax benefit		(136)		(79)		(201)
Less: Income attributable to noncontrolling interests		0		0		55
LendingClub net income (loss)		18,580		(187,538)		(30,745)
Transaction fees
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Net Revenue		416,839		207,640		598,760
LendingClub
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Interest income				0		0
Interest expense				0		0
Net fair value adjustments		5,936		0		0
Net interest income and fair value adjustments		10,504		0		0
Gain on sales of loans				0		0
Net investor revenue				0		0
Other revenue				0		0
Total net revenue				0		0
Non-interest income
Marketplace revenue		115,759		245,314		646,735
Other non-interest income		16,718		13,442		13,831
Total non-interest income		132,477		258,756		660,566
Interest income
Interest on loans held for sale		11,025		72,876		109,493
Interest on retail and certificate loans held for investment at fair value		57,684		115,952		214,395
Interest on other loans held for investment at fair value		4,436		7,688		1,104
Interest on securities available for sale		8,922		12,125		14,351
Other interest income		26		1,053		6,002
Total interest income		82,093		209,694		345,345
Interest expense
Interest on short-term borrowings		3,676		17,837		26,826
Interest on retail notes, certificates and secured borrowings		57,684		115,952		214,395
Interest on Structured Program borrowings		9,638		16,204		5,070
Interest on other long-term debt		591		373		1,013
Total interest expense		71,589		150,366		247,304
Net interest income				59,328		98,041
Total net revenue		142,981		318,084		758,607
Provision for credit losses		(3,382)		3,382		0
Operating expenses
Sales and marketing				0		0
Origination and servicing				0		0
Engineering and product development				0		0
Other general and administrative				0		0
Total non-interest expense				0		0
Non-interest expense
Compensation and benefits		31,010		252,517		333,628
Marketing		5,460		51,518		235,337
Equipment and software		2,459		26,842		24,927
Occupancy		17,751		27,870		29,367
Depreciation and amortization		39,716		54,030		59,152
Professional services		14,666		41,780		43,010
Other non-interest expense		86,977		47,762		64,077
Total non-interest expense		198,039		502,319		789,498
Income (Loss) before income tax benefit				(187,617)		(30,891)
Income tax benefit		(44,013)		(79)		(201)
Consolidated net income (loss)		(7,663)		(187,538)		(30,690)
Less: Income attributable to noncontrolling interests						55
LendingClub net income (loss)		$ 71,628				(30,745)
LendingClub | Transaction fees
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Net Revenue				0		0
LendingClub | Investor fees
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Net Revenue				0		0
LendingClub | LendingClub Historical Presentation
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Interest income				209,694		345,345
Interest expense				(141,503)		(246,587)
Net fair value adjustments				(117,247)		(144,990)
Net interest income and fair value adjustments				(49,056)		(46,232)
Gain on sales of loans				30,812		67,716
Net investor revenue				93,620		146,016
Other revenue				13,442		13,831
Total net revenue				314,702		758,607
Non-interest income
Marketplace revenue				0		0
Other non-interest income				0		0
Total non-interest income				0		0
Interest income
Interest on loans held for sale				0		0
Interest on retail and certificate loans held for investment at fair value				0		0
Interest on other loans held for investment at fair value				0		0
Interest on securities available for sale				0		0
Other interest income				0		0
Total interest income				0		0
Interest expense
Interest on short-term borrowings				0		0
Interest on retail notes, certificates and secured borrowings				0		0
Interest on Structured Program borrowings				0		0
Interest on other long-term debt				0		0
Total interest expense				0		0
Net interest income				0		0
Total net revenue				0		0
Provision for credit losses				0		0
Operating expenses
Sales and marketing				79,055		279,423
Origination and servicing				71,193		103,403
Engineering and product development				139,050		168,380
Other general and administrative				213,021		238,292
Total non-interest expense				502,319		789,498
Non-interest expense
Compensation and benefits				0		0
Marketing				0		0
Equipment and software				0		0
Occupancy				0		0
Depreciation and amortization				0		0
Professional services				0		0
Other non-interest expense				0		0
Total non-interest expense				0		0
Income (Loss) before income tax benefit				(187,617)		(30,891)
Income tax benefit				(79)		(201)
Consolidated net income (loss)				(187,538)		(30,690)
Less: Income attributable to noncontrolling interests						55
LendingClub net income (loss)						(30,745)
LendingClub | LendingClub Historical Presentation | Transaction fees
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Net Revenue				207,640		598,760
LendingClub | LendingClub Historical Presentation | Investor fees
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Net Revenue				111,864		124,532
LendingClub | Reclassification Adjustments
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Interest income				(209,694)		(345,345)
Interest expense				141,503		246,587
Net fair value adjustments				117,247		144,990
Net interest income and fair value adjustments				49,056		46,232
Gain on sales of loans				(30,812)		(67,716)
Net investor revenue				(93,620)		(146,016)
Other revenue				(13,442)		(13,831)
Total net revenue				(314,702)		(758,607)
Non-interest income
Marketplace revenue				245,314		646,735
Other non-interest income				13,442		13,831
Total non-interest income				258,756		660,566
Interest income
Interest on loans held for sale				72,876		109,493
Interest on retail and certificate loans held for investment at fair value				115,952		214,395
Interest on other loans held for investment at fair value				7,688		1,104
Interest on securities available for sale				12,125		14,351
Other interest income				1,053		6,002
Total interest income				209,694		345,345
Interest expense
Interest on short-term borrowings				17,837		26,826
Interest on retail notes, certificates and secured borrowings				115,952		214,395
Interest on Structured Program borrowings				16,204		5,070
Interest on other long-term debt				373		1,013
Total interest expense				150,366		247,304
Net interest income				59,328		98,041
Total net revenue				318,084		758,607
Provision for credit losses				3,382		0
Operating expenses
Sales and marketing				(79,055)		(279,423)
Origination and servicing				(71,193)		(103,403)
Engineering and product development				(139,050)		(168,380)
Other general and administrative				(213,021)		(238,292)
Total non-interest expense				(502,319)		(789,498)
Non-interest expense
Compensation and benefits				252,517		333,628
Marketing				51,518		235,337
Equipment and software				26,842		24,927
Occupancy				27,870		29,367
Depreciation and amortization				54,030		59,152
Professional services				41,780		43,010
Other non-interest expense				47,762		64,077
Total non-interest expense				502,319		789,498
Income (Loss) before income tax benefit				0		0
Income tax benefit				0		0
Consolidated net income (loss)				0		0
Less: Income attributable to noncontrolling interests						0
LendingClub net income (loss)						0
LendingClub | Reclassification Adjustments | Transaction fees
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Net Revenue				(207,640)		(598,760)
LendingClub | Reclassification Adjustments | Investor fees
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Net Revenue				$ (111,864)		$ (124,532)

[1] Prior period amounts have been reclassified to conform to the current period presentation. See “Notes to Consolidated Financial Statements – Note 1. Summary of Significant Accounting Policies” for additional information.

[2] Prior period amounts have been reclassified to conform to the current period presentation. See “Notes to Consolidated Financial Statements – Note 1. Summary of Significant Accounting Policies” for additional information.