Schedule of Lending Club's Affiliates Platform Deposits, Platform Withdrawals, and Investment in Notes and Certificates (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
	Sep. 30, 2013	Dec. 31, 2012
Related Party Transaction [Line Items]
Platform Deposits	$ 1,868
Platform Withdrawals	317
Investments	5,080	3,144
Executive Officers
Related Party Transaction [Line Items]
Platform Withdrawals	20
Investments	38	39
Directors
Related Party Transaction [Line Items]
Platform Deposits	1,868
Platform Withdrawals	297
Investments	$ 5,042	$ 3,105