New Accounting Standards (Policies)	9 Months Ended
New Accounting Standards (Policies)	Sep. 30, 2015
Accounting Policies [Abstract]
Basis of Accounting, Policy	LendingClub Corporation (Lending Club) is an online marketplace connecting borrowers and investors. LC Advisors, LLC (LCA), is a registered investment advisor with the Securities and Exchange Commission (SEC) and wholly-owned subsidiary of Lending Club that acts as the general partner for certain private funds and advisor to separately managed accounts. Springstone Financial, LLC (Springstone), is a wholly-owned subsidiary of Lending Club that facilitates education and patient finance loans. LC Trust I (the Trust) is an independent Delaware business trust that acquires and holds loans from Lending Club for the sole benefit of certain investors that purchase trust certificates (Certificates) issued by the Trust and that are related to underlying loans. The accompanying unaudited condensed consolidated financial statements include Lending Club, the Trust, LCA and Springstone (collectively referred to as the Company, we, or us). All intercompany balances and transactions have been eliminated. These condensed consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America (GAAP) for interim financial information necessary for the fair statement of the results and financial position for the periods presented. The Company's results of operations and cash flows for any interim period are not necessarily indicative of the results for the full year or any other interim period. The accompanying interim condensed consolidated financial statements and these related notes should be read in conjunction with the consolidated financial statements and related notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2014 (Annual Report).
Impact of New Accounting Standards	In February 2015, the Financial Accounting Standards Board (FASB) issued new guidance amending accounting for consolidations, which will be effective January 1, 2016. The guidance changes what an investor must consider in determining whether it is required to consolidate an entity in which it holds an interest. The Company is currently evaluating the impact of this guidance on the Company’s financial position, results of operations, earnings per common share, and cash flows. In April 2015, the FASB issued new guidance amending accounting for customer's cloud based fees, which will be effective January 1, 2016. The guidance changes what a customer must consider in determining whether a cloud computing arrangement contains a software license. If the arrangement contains a software license, the customer would account for the fees related to the software license element in accordance with guidance related to internal use software; if the arrangement does not contain a software license, the customer would account for the arrangement as a service contract. The Company is currently evaluating the impact of this guidance on the Company’s financial position, results of operations, earnings per common share, and cash flows. In September 2015, the FASB amended existing guidance related to recognition of adjustments to provisional amounts recorded during purchase accounting. Changes recognized during the measurement period will be recognized prospectively as adjustments to goodwill, with corresponding changes in income or expense, such as revised depreciation or amortization, recognized in current period earnings. This amendment is effective January 1, 2016. Since we do not currently have any open measurement periods related to any business acquisition, adoption of this standard will not have an impact on the Company's financial position, results of operations, earnings per common share, or cash flows.
Marketable Securities, Available-for-sale Securities, Policy	Management evaluates whether securities available for sale are OTTI on a quarterly basis. Debt securities with unrealized losses are considered OTTI if the Company intends to sell the security or if it is more likely than not that it will be required to sell such security before any anticipated recovery. If management determines that a security is OTTI under these circumstances, the impairment recognized in earnings is measured as the entire difference between the amortized cost and then-current fair value. A security is also OTTI if management does not expect to recover all of the amortized cost of the security. In this circumstance, the impairment recognized in earnings represents estimated credit loss, and is measured by the difference between the present value of expected cash flows and the amortized cost of the security. Management utilizes cash flow models to estimate the expected future cash flow from the securities to estimate the credit loss when necessary. Expected cash flows are discounted using the security's effective interest rate. The evaluation of whether the Company expects to recover the amortized cost of a security is inherently judgmental. The evaluation includes the assessment of several security performance indicators, including the magnitude and duration of the unrealized loss and whether the Company has received all scheduled principal and interest payments.
Fair Value Measurement, Policy	For a description of the fair value hierarchy and the Company’s fair value methodologies, see "Part II - Item 8 - Financial Statements and Supplementary Data - Note 2 - Summary of Significant Accounting Policies" in the Annual Report. The Company did not transfer any assets or liabilities in or out of level 3 during the third quarter and first nine months of 2015 or the year ended December 31, 2014. Financial Instruments Recorded at Fair Value See "Part II - Item 8 - Financial Statements and Supplementary Data - Note 2 - Summary of Significant Accounting Policies" in the Company's Annual Report for a description of the fair value methodology for loans, notes and certificates. In the third quarter of 2015, the Company incorporated cumulative prepayments into the valuation of loans, notes and certificates to better reflect a market participant's view of valuation assumptions underlying unsecured consumer credit obligations. Prior to the third quarter, the effect of prepayments was reflected through an effective adjustment to the discount rates used in the fair value methodology. Cumulative prepayments are estimates of the cumulative amount of principal prepayments that will occur over the entire life of a loan expressed as a percentage of the original principal amount of the loan. The assumption regarding cumulative prepayments reduces the projected balances and expected terms of the loans, notes and certificates. When available, the Company uses quoted prices in active markets to measure the fair value of securities available for sale. When utilizing market data and bid-ask spreads, the Company uses the price within the bid-ask spread that best represents fair value. When quoted prices do not exist, the Company uses prices obtained from independent third-party pricing services to measure the fair value of securities available for sale. The Company's primary independent pricing service provides prices based on observable trades and discounted cash flows that incorporate observable information, such as yields for similar types of securities (a benchmark interest rate plus observable spreads) and weighted-average maturity for the same or similar "to-be-issued" securities. The Company compares the prices obtained from its primary independent pricing service to the prices obtained from the additional independent pricing services to determine if the price obtained from the primary independent pricing service is reasonable. The Company does not adjust the prices received from independent third-party pricing services unless such prices are inconsistent with the definition of fair value and result in a material difference in the recorded amounts.