Summary of Significant Accounting Policies	9 Months Ended
Sep. 30, 2015
Accounting Policies [Abstract]
Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block]	Summary of Significant Accounting Policies Organization and Basis of Presentation Aircastle Limited (“Aircastle,” the “Company,” “we,” “us” or “our”) is a Bermuda exempted company that was incorporated on October 29, 2004 under the provisions of Section 14 of the Companies Act of 1981 of Bermuda. Aircastle’s business is investing in aviation assets, including acquiring, leasing, managing and selling high utility commercial jet aircraft. Aircastle is a holding company that conducts its business through subsidiaries. Aircastle directly or indirectly owns all of the outstanding common shares of its subsidiaries. The consolidated financial statements presented are prepared in accordance with U.S. generally accepted accounting principles (“US GAAP”). We operate in one segment. The accompanying consolidated financial statements are unaudited and have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”) for interim financial reporting and, in our opinion, reflect all adjustments, including normal recurring items, which are necessary to present fairly the results for interim periods. Operating results for the periods presented are not necessarily indicative of the results that may be expected for the entire year. Certain information and footnote disclosures normally included in consolidated financial statements prepared in accordance with US GAAP have been omitted in accordance with the rules and regulations of the SEC; however, we believe that the disclosures are adequate to make information presented not misleading. These financial statements should be read in conjunction with the consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2014. The Company’s management has reviewed and evaluated all events or transactions for potential recognition and/or disclosure since the balance sheet date of September 30, 2015 through the date on which the consolidated financial statements included in this Form 10-Q were issued. Effective July 1, 2015, the Company adopted Financial Accounting Standards Board (“FASB”) Accounting Standards Update (“ASU”) 2015-03, Interest - Imputation of Interest (Subtopic 835-30) Simplifying the Presentation of Debt Issuance Costs, which requires debt issuance costs to be presented in the balance sheet as a direct deduction from the associated debt liability. The guidance in the new standard is limited to the presentation of debt issuance costs and does not affect the recognition and measurement of debt issuance costs. The standard is effective for financial statements issued for fiscal years beginning after December 15, 2015, and interim periods within those fiscal years. Early adoption is permitted for financial statements that have not been previously issued. The new guidance is applied on a retrospective basis. The adoption of this standard did not have a material impact on the Company’s consolidated financial statements. Principles of Consolidation The consolidated financial statements include the accounts of Aircastle and all of its subsidiaries. Aircastle consolidates seven Variable Interest Entities (“VIEs”) of which Aircastle is the primary beneficiary. All intercompany transactions and balances have been eliminated in consolidation. We consolidate VIEs in which we have determined that we are the primary beneficiary. We use judgment when deciding (a) whether an entity is subject to consolidation as a VIE, (b) who the variable interest holders are, (c) the potential expected losses and residual returns of the variable interest holders, and (d) which variable interest holder is the primary beneficiary. When determining which enterprise is the primary beneficiary, we consider (1) the entity’s purpose and design, (2) which variable interest holder has the power to direct the activities that most significantly impact the entity’s economic performance, and (3) the obligation to absorb losses of the entity or the right to receive benefits from the entity that could potentially be significant to the VIE. When certain events occur, we reconsider whether we are the primary beneficiary of VIEs. We do not reconsider whether we are a primary beneficiary solely because of operating losses incurred by an entity. Use of Estimates The preparation of financial statements in conformity with US GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. While Aircastle believes that the estimates and related assumptions used in the preparation of the consolidated financial statements are appropriate, actual results could differ from those estimates. Proposed Accounting Pronouncements In May 2013, the FASB issued re-exposure draft, “Leases” (the “Lease Re-ED”), which would replace the existing guidance in the Accounting Standards Codification (“ASC”) 840 (“ASC 840”), Leases. In March 2014, the FASB decided that the accounting for leases by lessors would basically remain unchanged from the concepts existing in current ASC 840 accounting. In addition, the FASB decided that a lessor should be precluded from recognizing selling profit and revenue at lease commencement for any sales-type or direct finance lease that does not transfer control of the underlying asset to the lessee. This requirement aligns the notion of what constitutes a sale in the lessor accounting guidance with that in the forthcoming revenue recognition standard, which evaluates whether a sale has occurred from the customer’s perspective. We anticipate that the final standard may have an effective date no earlier than 2018. We believe that when and if the proposed guidance becomes effective, it will not have a material impact on the Company’s consolidated financial statements. On May 28, 2014, the FASB and the International Accounting Standards Board (the “IASB”) (collectively, the Boards), jointly issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606). Lease contracts within the scope of ASC 840, Leases, are specifically excluded from ASU No. 2014-09. The standard’s core principle is that a company will recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which a company expects to be entitled in exchange for those goods or services. The standard is effective for public entities beginning after December 15, 2017. The standard allows for either “full retrospective” adoption, meaning the standard is applied to all of the periods presented, or “modified retrospective” adoption, meaning the standard is applied only to the most current period presented in the financial statements. We are evaluating the effect that ASU 2014-09 will have on our consolidated financial statements and related disclosures. The Company is currently evaluating the impact of the ASU on its consolidated financial statements and related disclosures. On August 27, 2014, the FASB issued ASU No. 2014-15, Presentation of Financial Statements - Going Concern (Subtopic 205-40). The standard requires management of public companies to evaluate whether there is substantial doubt about the entity’s ability to continue as a going concern and, if so, disclose that fact. Management should evaluate whether there are conditions or events, considered in the aggregate, that raises substantial doubt about the entity’s ability to continue as a going concern within one year after the date that the financial statements are issued (or available to be issued, when applicable). The standard is effective for annual periods ending after December 15, 2016 and interim periods thereafter, and early adoption is permitted. We do not believe the standard will have a material impact on our consolidated financial statements and related disclosures when adopted.

Summary of Significant Accounting Policies

Organization and Basis of Presentation

Aircastle Limited (“Aircastle,” the “Company,” “we,” “us” or “our”) is a Bermuda exempted company that was incorporated on October 29, 2004 under the provisions of Section 14 of the Companies Act of 1981 of Bermuda. Aircastle’s business is investing in aviation assets, including acquiring, leasing, managing and selling high utility commercial jet aircraft.

Aircastle is a holding company that conducts its business through subsidiaries. Aircastle directly or indirectly owns all of the outstanding common shares of its subsidiaries. The consolidated financial statements presented are prepared in accordance with U.S. generally accepted accounting principles (“US GAAP”). We operate in one segment.

The accompanying consolidated financial statements are unaudited and have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”) for interim financial reporting and, in our opinion, reflect all adjustments, including normal recurring items, which are necessary to present fairly the results for interim periods. Operating results for the periods presented are not necessarily indicative of the results that may be expected for the entire year. Certain information and footnote disclosures normally included in consolidated financial statements prepared in accordance with US GAAP have been omitted in accordance with the rules and regulations of the SEC; however, we believe that the disclosures are adequate to make information presented not misleading. These financial statements should be read in conjunction with the consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2014.

The Company’s management has reviewed and evaluated all events or transactions for potential recognition and/or disclosure since the balance sheet date of September 30, 2015 through the date on which the consolidated financial statements included in this Form 10-Q were issued.

Effective July 1, 2015, the Company adopted Financial Accounting Standards Board (“FASB”) Accounting Standards Update (“ASU”) 2015-03, Interest - Imputation of Interest (Subtopic 835-30) Simplifying the Presentation of Debt Issuance Costs, which requires debt issuance costs to be presented in the balance sheet as a direct deduction from the associated debt liability. The guidance in the new standard is limited to the presentation of debt issuance costs and does not affect the recognition and measurement of debt issuance costs. The standard is effective for financial statements issued for fiscal years beginning after December 15, 2015, and interim periods within those fiscal years. Early adoption is permitted for financial statements that have not been previously issued. The new guidance is applied on a retrospective basis. The adoption of this standard did not have a material impact on the Company’s consolidated financial statements.

Principles of Consolidation

The consolidated financial statements include the accounts of Aircastle and all of its subsidiaries. Aircastle consolidates seven Variable Interest Entities (“VIEs”) of which Aircastle is the primary beneficiary. All intercompany transactions and balances have been eliminated in consolidation.

We consolidate VIEs in which we have determined that we are the primary beneficiary. We use judgment when deciding (a) whether an entity is subject to consolidation as a VIE, (b) who the variable interest holders are, (c) the potential expected losses and residual returns of the variable interest holders, and (d) which variable interest holder is the primary beneficiary. When determining which enterprise is the primary beneficiary, we consider (1) the entity’s purpose and design, (2) which variable interest holder has the power to direct the activities that most significantly impact the entity’s economic performance, and (3) the obligation to absorb losses of the entity or the right to receive benefits from the entity that could potentially be significant to the VIE. When certain events occur, we reconsider whether we are the primary beneficiary of VIEs. We do not reconsider whether we are a primary beneficiary solely because of operating losses incurred by an entity.

Use of Estimates

The preparation of financial statements in conformity with US GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. While Aircastle believes that the estimates and related assumptions used in the preparation of the consolidated financial statements are appropriate, actual results could differ from those estimates.

Proposed Accounting Pronouncements

In May 2013, the FASB issued re-exposure draft, “Leases” (the “Lease Re-ED”), which would replace the existing guidance in the Accounting Standards Codification (“ASC”) 840 (“ASC 840”), Leases. In March 2014, the FASB decided that the accounting for leases by lessors would basically remain unchanged from the concepts existing in current ASC 840 accounting. In addition, the FASB decided that a lessor should be precluded from recognizing selling profit and revenue at lease commencement for any sales-type or direct finance lease that does not transfer control of the underlying asset to the lessee. This requirement aligns the notion of what constitutes a sale in the lessor accounting guidance with that in the forthcoming revenue recognition standard, which evaluates whether a sale has occurred from the customer’s perspective. We anticipate that the final standard may have an effective date no earlier than 2018. We believe that when and if the proposed guidance becomes effective, it will not have a material impact on the Company’s consolidated financial statements.

On May 28, 2014, the FASB and the International Accounting Standards Board (the “IASB”) (collectively, the Boards), jointly issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606). Lease contracts within the scope of ASC 840, Leases, are specifically excluded from ASU No. 2014-09. The standard’s core principle is that a company will recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which a company expects to be entitled in exchange for those goods or services. The standard is effective for public entities beginning after December 15, 2017. The standard allows for either “full retrospective” adoption, meaning the standard is applied to all of the periods presented, or “modified retrospective” adoption, meaning the standard is applied only to the most current period presented in the financial statements. We are evaluating the effect that ASU 2014-09 will have on our consolidated financial statements and related disclosures. The Company is currently evaluating the impact of the ASU on its consolidated financial statements and related disclosures.

On August 27, 2014, the FASB issued ASU No. 2014-15, Presentation of Financial Statements - Going Concern (Subtopic 205-40). The standard requires management of public companies to evaluate whether there is substantial doubt about the entity’s ability to continue as a going concern and, if so, disclose that fact. Management should evaluate whether there are conditions or events, considered in the aggregate, that raises substantial doubt about the entity’s ability to continue as a going concern within one year after the date that the financial statements are issued (or available to be issued, when applicable). The standard is effective for annual periods ending after December 15, 2016 and interim periods thereafter, and early adoption is permitted. We do not believe the standard will have a material impact on our consolidated financial statements and related disclosures when adopted.