Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Treasury Stock	Accumulated Other Comprehensive Income	Accumulated Deficit	Total LendingClub Stockholders’ Equity	Noncontrolling Interests
Beginning Balances (in shares) at Dec. 31, 2014		371,443,916		0
Beginning Balances at Dec. 31, 2014	$ 973,219	$ 3,714	$ 1,052,728	$ 0	$ 0	$ (83,223)	$ 973,219	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation and related tax effects	56,005		56,005				56,005
Stock option exercises and other (in shares)		7,862,705
Stock option exercises and other	13,473	$ 79	13,394				13,473
ESPP purchase shares (in shares)		410,009
ESPP purchase shares	5,091	$ 4	5,087				5,091
Net unrealized gain on available for sale securities, net of tax	(1,671)				(1,671)		(1,671)
Excess tax benefit from share-based award activity	738		738				738
Net loss	(4,995)					(4,995)	(4,995)
Net loss, including portion attributable to noncontrolling interest	(4,995)
Ending Balances (in shares) at Dec. 31, 2015		379,716,630		0
Ending Balances at Dec. 31, 2015	1,041,860	$ 3,797	1,127,952	$ 0	(1,671)	(88,218)	1,041,860	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation and related tax effects	79,803		79,803				79,803
Stock option exercises and other (in shares)		19,037,329
Stock option exercises and other	13,589	$ 191	13,398				13,589
Treasury stock (shares)		(2,282,700)		2,282,700
Treasury stock	(19,485)			$ (19,485)			(19,485)
ESPP purchase shares (in shares)		1,508,513
ESPP purchase shares	5,244	$ 15	5,229				5,244
Net unrealized gain on available for sale securities, net of tax	904				904		904
Excess tax benefit from share-based award activity	(176)		(176)				(176)
Net loss	(145,969)					(145,969)	(145,969)
Net loss, including portion attributable to noncontrolling interest	(145,969)
Ending Balances (in shares) at Dec. 31, 2016		397,979,772		2,282,700
Ending Balances at Dec. 31, 2016	975,770	$ 4,003	1,226,206	$ (19,485)	(767)	(234,187)	975,770	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation and related tax effects	$ 80,202		81,599			(1,397)	80,202
Stock option exercises and other (in shares)	7,213,167	18,174,537
Stock option exercises and other	$ 13,985	$ 182	13,803				13,985
ESPP purchase shares (in shares)		1,319,537
ESPP purchase shares	5,611	$ 13	5,598				5,611
Net unrealized gain on available for sale securities, net of tax	775				762		762	13
Contribution of interests in consolidated VIE	7,722						0	7,722
Dividends paid and return of capital to noncontrolling interests	(2,263)						0	(2,263)
Net loss	(153,835)					(153,835)	(153,835)	(210)
Net loss, including portion attributable to noncontrolling interest	(154,045)
Ending Balances (in shares) at Dec. 31, 2017		417,473,846		2,282,700
Ending Balances at Dec. 31, 2017	$ 927,757	$ 4,198	$ 1,327,206	$ (19,485)	$ (5)	$ (389,419)	$ 922,495	$ 5,262