Condensed Consolidated Statements of Operations - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2018	Mar. 31, 2017
Income Statement [Abstract]
Transaction fees		$ 111,182	$ 98,692
Investor fees		27,895	21,180
Gain on sales of loans (1)	[1]	12,671	1,892
Other revenue (1)	[1]	1,457	1,746
Net interest income and fair value adjustments:
Interest income		138,018	160,996
Interest expense		(110,843)	(158,607)
Net fair value adjustments (1)	[1]	(28,713)	(1,417)
Net interest income and fair value adjustments (1)	[1]	(1,538)	972
Total net revenue		151,667	124,482
Operating expenses:
Sales and marketing		57,517	54,583
Origination and servicing		22,645	20,449
Engineering and product development		36,837	35,760
Other general and administrative		52,309	43,574
Regulatory litigation expense		13,500	0
Total operating expenses		182,808	154,366
Loss before income tax expense		(31,141)	(29,884)
Income tax expense (benefit)		39	(40)
Consolidated net loss		(31,180)	(29,844)
Less: Income attributable to noncontrolling interests		1	0
LendingClub net loss		$ (31,181)	$ (29,844)
Net loss per share attributable to LendingClub: Basic ($ per share)		$ (0.07)	$ (0.07)
Net loss per share attributable to LendingClub: Diluted ($ per share)		$ (0.07)	$ (0.07)
Weighted-average common shares - Diluted (shares)		418,299,301	400,308,521
Weighted-average common shares - Basic (shares)		418,299,301	400,308,521

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