Basis of Presentation	12 Months Ended
Dec. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation LendingClub Corporation (LendingClub) operates an online lending marketplace platform that connects borrowers and investors. LendingClub Asset Management, LLC (LCAM), is a registered investment advisor with the Securities and Exchange Commission (SEC) and wholly-owned subsidiary of LendingClub that acts as the general partner for certain private funds. Additionally, LCAM is an advisor to separately managed accounts (SMAs) and funds of which LCAM’s wholly-owned subsidiaries are the general partners. Springstone Financial, LLC (Springstone), is a wholly-owned subsidiary of LendingClub that facilitates the origination of education and patient finance loans by third-party issuing banks. LC Trust I (the Trust) is an independent Delaware business trust that acquires loans from LendingClub and holds them for the sole benefit of certain investors that have purchased trust certificates (Certificates) issued by the Trust that are related to specific underlying loans for the benefit of the investor. Consumer Loan Underlying Bond Certificate Issuer Trust I (Master Trust) is a Delaware statutory master trust in series that provides accredited investors and qualified institutional buyers the opportunity to invest in a pool of unsecured personal whole loans in a certificated form (CLUB Certificates). LendingClub Warehouse I LLC (Warehouse) and LendingClub Warehouse II LLC (Warehouse II) are wholly-owned subsidiaries of LendingClub established to enter into warehouse credit agreements with certain lenders for secured revolving credit facilities. In connection with its role as the sponsor of an asset-backed securities securitization transaction, LendingClub owns a 56% interest in a majority-owned affiliate (MOA), LendingClub Operated Aggregator Note (LOAN) NP I, LLC. LendingClub holds a controlling financial interest and is the primary beneficiary of the MOA and consolidates the MOA in its financial statements. Additionally, in 2017, LendingClub established Consumer Loan Underlying Bond Depositor LLC (Depositor), a wholly-owned limited liability company, and Consumer Loan Underlying Bond Credit Trust 2017-P2, LLC (Credit Trust) and Consumer Loan Underlying Bond Grantor Trust 2017-P2, LLC (Grantor Trust), issuer and grantor trusts that facilitated a LendingClub-sponsored asset-backed securities transaction. See “Note 6. Securitizations and Variable Interest Entities” for additional information. The accompanying consolidated financial statements include LendingClub, its consolidated subsidiaries (collectively referred to as the Company) and variable interest entities (VIEs). Noncontrolling interests are reported as a separate component of consolidated equity in the Consolidated Balance Sheets from the equity attributable to LendingClub’s stockholders for all periods presented. All intercompany balances and transactions have been eliminated. These consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America (GAAP) for financial information. These accounting principles require management to make certain estimates, judgments and assumptions that affect the amounts in the accompanying financial statements and related notes. The Company bases its estimates on historical experience and on various other factors it believes to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of certain assets and liabilities. These judgments, assumptions and estimates include but are not limited to the following: (i) fair value determinations for servicing assets and liabilities; (ii) fair value determinations for loans held for investment, loans held for sale, notes, certificates and secured borrowings; (iii) fair value determinations for securities available for sale; (iv) stock-based compensation expense; (v) provision for income taxes, net of valuation allowance for deferred tax assets; (vi) recoverability of property, equipment and software; (vii) carrying values of goodwill and intangible assets; (viii) consolidation of variable interest entities; and (ix) accrued liabilities for contingencies. These judgments, estimates and assumptions are inherently subjective in nature and actual results may differ from these estimates and assumptions, and the differences could be material. In the fourth quarter of 2017, the Company disaggregated “Loans” on the Consolidated Balance Sheets to separately present “Loans held for investment” and “Loans held for investment by the Company.” Additionally, the Company separately presented “Loans held for sale by the Company” from “Loans held for sale.” These changes had no impact on “Total assets.” Prior period amounts have been reclassified to conform to current period presentation. In the first quarter of 2017, the Company simplified the presentation of “Total net revenue” in the Consolidated Statements of Operations to present revenues from transactions with investors as a single line item reported as “Investor fees” by aggregating the revenues previously separately reported as “Servicing fees” and “Management fees.” Additionally, in the fourth quarter of 2017, the Company separately reported “Gain (Loss) on sales of loans” and “Net fair value adjustments” from “Other revenue (expense)” in the Company’s Consolidated Statements of Operations. “Net fair value adjustments” was also revised to include other-than-temporary impairment charges on subordinated residual certificates held as a result of Company-sponsored securitization transactions, which were previously included in “Other revenue. These changes had no impact on “Total net revenue.” Prior period amounts have been reclassified to conform to the current period presentation.

Basis of Presentation

LendingClub Corporation (LendingClub) operates an online lending marketplace platform that connects borrowers and investors. LendingClub Asset Management, LLC (LCAM), is a registered investment advisor with the Securities and Exchange Commission (SEC) and wholly-owned subsidiary of LendingClub that acts as the general partner for certain private funds. Additionally, LCAM is an advisor to separately managed accounts (SMAs) and funds of which LCAM’s wholly-owned subsidiaries are the general partners. Springstone Financial, LLC (Springstone), is a wholly-owned subsidiary of LendingClub that facilitates the origination of education and patient finance loans by third-party issuing banks. LC Trust I (the Trust) is an independent Delaware business trust that acquires loans from LendingClub and holds them for the sole benefit of certain investors that have purchased trust certificates (Certificates) issued by the Trust that are related to specific underlying loans for the benefit of the investor. Consumer Loan Underlying Bond Certificate Issuer Trust I (Master Trust) is a Delaware statutory master trust in series that provides accredited investors and qualified institutional buyers the opportunity to invest in a pool of unsecured personal whole loans in a certificated form (CLUB Certificates). LendingClub Warehouse I LLC (Warehouse) and LendingClub Warehouse II LLC (Warehouse II) are wholly-owned subsidiaries of LendingClub established to enter into warehouse credit agreements with certain lenders for secured revolving credit facilities.

In connection with its role as the sponsor of an asset-backed securities securitization transaction, LendingClub owns a 56% interest in a majority-owned affiliate (MOA), LendingClub Operated Aggregator Note (LOAN) NP I, LLC. LendingClub holds a controlling financial interest and is the primary beneficiary of the MOA and consolidates the MOA in its financial statements. Additionally, in 2017, LendingClub established Consumer Loan Underlying Bond Depositor LLC (Depositor), a wholly-owned limited liability company, and Consumer Loan Underlying Bond Credit Trust 2017-P2, LLC (Credit Trust) and Consumer Loan Underlying Bond Grantor Trust 2017-P2, LLC (Grantor Trust), issuer and grantor trusts that facilitated a LendingClub-sponsored asset-backed securities transaction. See “Note 6. Securitizations and Variable Interest Entities” for additional information.

The accompanying consolidated financial statements include LendingClub, its consolidated subsidiaries (collectively referred to as the Company) and variable interest entities (VIEs). Noncontrolling interests are reported as a separate component of consolidated equity in the Consolidated Balance Sheets from the equity attributable to LendingClub’s stockholders for all periods presented. All intercompany balances and transactions have been eliminated. These consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America (GAAP) for financial information.

These accounting principles require management to make certain estimates, judgments and assumptions that affect the amounts in the accompanying financial statements and related notes. The Company bases its estimates on historical experience and on various other factors it believes to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of certain assets and liabilities. These judgments, assumptions and estimates include but are not limited to the following: (i) fair value determinations for servicing assets and liabilities; (ii) fair value determinations for loans held for investment, loans held for sale, notes, certificates and secured borrowings; (iii) fair value determinations for securities available for sale; (iv) stock-based compensation expense; (v) provision for income taxes, net of valuation allowance for deferred tax assets; (vi) recoverability of property, equipment and software; (vii) carrying values of goodwill and intangible assets; (viii) consolidation of variable interest entities; and (ix) accrued liabilities for contingencies. These judgments, estimates and assumptions are inherently subjective in nature and actual results may differ from these estimates and assumptions, and the differences could be material.

In the fourth quarter of 2017, the Company disaggregated “Loans” on the Consolidated Balance Sheets to separately present “Loans held for investment” and “Loans held for investment by the Company.” Additionally, the Company separately presented “Loans held for sale by the Company” from “Loans held for sale.” These changes had no impact on “Total assets.” Prior period amounts have been reclassified to conform to current period presentation.

In the first quarter of 2017, the Company simplified the presentation of “Total net revenue” in the Consolidated Statements of Operations to present revenues from transactions with investors as a single line item reported as “Investor fees” by aggregating the revenues previously separately reported as “Servicing fees” and “Management fees.” Additionally, in the fourth quarter of 2017, the Company separately reported “Gain (Loss) on sales of loans” and “Net fair value adjustments” from “Other revenue (expense)” in the Company’s Consolidated Statements of Operations. “Net fair value adjustments” was also revised to include other-than-temporary impairment charges on subordinated residual certificates held as a result of Company-sponsored securitization transactions, which were previously included in “Other revenue. These changes had no impact on “Total net revenue.” Prior period amounts have been reclassified to conform to the current period presentation.