Condensed Consolidated Statements of Operations - USD ($)		3 Months Ended				9 Months Ended
		Sep. 30, 2017		Sep. 30, 2016		Sep. 30, 2017	Sep. 30, 2016
Income Statement [Abstract]
Transaction fees		$ 121,905,000		$ 100,813,000		$ 327,911,000	$ 321,926,000
Investor fees		20,499,000	[1]	18,477,000	[1]	62,795,000	53,620,000
Other revenue (expense)		(225,000)	[1]	(7,158,000)	[1]	6,219,000	(10,965,000)
Other revenue (expense)
Interest income		151,532,000		171,868,000		469,788,000	529,432,000
Interest expense		(139,681,000)		(169,444,000)		(448,628,000)	(523,723,000)
Net interest income		11,851,000		2,424,000		21,160,000	5,709,000
Total net revenue		154,030,000		114,556,000		418,085,000	370,290,000
Operating expenses:
Sales and marketing		59,570,000		44,901,000		169,735,000	161,213,000
Origination and servicing		21,321,000		16,332,000		63,044,000	56,464,000
Engineering and product development		32,860,000		29,428,000		104,338,000	82,835,000
Other general and administrative		46,925,000		58,940,000		142,994,000	150,432,000
Goodwill impairment	[1]	0		1,650,000		0	37,050,000
Total operating expenses		160,676,000		151,251,000		480,111,000	487,994,000
Loss before income tax expense		(6,646,000)		(36,695,000)		(62,026,000)	(117,704,000)
Income tax expense (benefit)		13,000		(209,000)		(79,000)	(4,004,000)
Consolidated net loss		(6,659,000)		(36,486,000)		(61,947,000)	(113,700,000)
Less: Loss attributable to noncontrolling interests		(129,000)		0		(119,000)	0
LendingClub net loss		$ (6,530,000)		$ (36,486,000)		$ (61,828,000)	$ (113,700,000)
Net loss per share attributable to LendingClub: Basic ($ per share)		$ (0.02)		$ (0.09)		$ (0.15)	$ (0.30)
Net loss per share attributable to LendingClub: Diluted ($ per share)		$ (0.02)		$ (0.09)		$ (0.15)	$ (0.30)
Weighted-average common shares - Diluted (shares)		412,778,995		391,453,316		406,633,850	385,037,334
Weighted-average common shares - Basic (shares)		412,778,995		391,453,316		406,633,850	385,037,334

[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.