Summary of Significant Accounting Policies	9 Months Ended
Sep. 30, 2015
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Consolidated Financial Statements The consolidated balance sheet at December 31, 2014 has been derived from audited consolidated financial statements and the consolidated interim financial statements included herein have been prepared without audit pursuant to the rules and regulations of the Securities and Exchange Commission (SEC). Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America (GAAP) have been condensed or omitted pursuant to such rules and regulations. These consolidated financial statements were prepared in accordance with GAAP for interim financial statements and with instructions for Form 10-Q and Regulation S-X Section 210.10-01. Further information on Metro Bancorp, Inc.'s (Metro or the Company) accounting policies are available in Note 1 (Significant Accounting Policies) of the Notes to Consolidated Financial Statements included in the Company's Annual Report on Form 10-K for the year ended December 31, 2014. The accompanying consolidated financial statements reflect all adjustments that are, in the opinion of management, necessary to reflect a fair statement of the results for the interim periods presented. Such adjustments are of a normal, recurring nature. These consolidated financial statements should be read in conjunction with the audited consolidated financial statements and the notes thereto included in the Company's Annual Report on Form 10-K for the year ended December 31, 2014. Events occurring subsequent to the balance sheet date through the date of issuance have been evaluated for potential recognition or disclosure in the consolidated financial statements. The results for the nine months ended September 30, 2015 are not necessarily indicative of the results that may be expected for the year ending December 31, 2015. The consolidated financial statements include the accounts of the Company and its consolidated subsidiaries including Metro Bank (the Bank). All material intercompany transactions have been eliminated. Use of Estimates The consolidated financial statements are prepared in conformity with GAAP. Accounting principles generally accepted in the United States of America require management to make estimates and assumptions that affect reported amounts of assets and liabilities and require disclosure of contingent assets and liabilities. In the opinion of management, all adjustments considered necessary for fair presentation have been included and are of a normal, recurring nature. Actual results could differ from these estimates. Material estimates that are particularly susceptible to significant change in the near term relate to the determination of the allowance for loan losses (allowance or ALL), impaired loans, the valuation of foreclosed assets, the valuation of securities available for sale, the valuation of deferred tax assets, the determination of other-than-temporary impairment (OTTI) on the Company's investment securities portfolio and other fair value measurements. Recent Accounting Standards In January 2014, the Financial Accounting Standards Board (FASB) issued ASU 2014-04, Reclassification of Residential Real Estate Collateralized Consumer Mortgage Loans upon Foreclosure, which clarifies when a creditor should be considered to have received physical possession of residential real estate property collateralizing a consumer mortgage loan such that the loan should be derecognized and the real estate property recognized. This guidance is effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2014. The Company adopted this guidance on January 1, 2015 using a prospective transition method; it did not have a material impact on our consolidated financial statements. The guidance requires disclosure of both (1) the amount of foreclosed residential real estate property held by the creditor and (2) the recorded investment in consumer mortgage loans collateralized by residential real estate property that are in the process of foreclosure. The Company has included these disclosures in Note 5 Foreclosed Assets. In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606), which specifies how and when to recognize revenue and includes additional disclosures. On August 12, 2015, the FASB issued ASU 2015-14, which deferred the effective date of ASU 2014-09 to annual reporting periods beginning after December 15, 2017, including interim reporting periods within that reporting period. ASU 2014-09 allows for either full retrospective or modified retrospective application. Early application is not permitted. We are currently evaluating the impact ASU 2014-09 will have on our consolidated financial statements. On April 7, 2015, the FASB issued ASU 2015-03, 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 instead of presented as a deferred charge. On August 18, 2015, the FASB issued ASU 2015-15, Presentation and Subsequent Measurement of Debt Issuance Costs Associated with Line-of-Credit Arrangements - Amendments to SEC Paragraphs Pursuant to Staff Announcement at June 18, 2015 EITF Meeting, which codifies SEC Staff Guidance related to issuance costs related to line-of-credit arrangements. For public business entities, the standards are 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 will be applied on a retrospective basis. We do not believe the adoption of this guidance will have a material impact on our consolidated financial statements. On April 15, 2015, the FASB issued ASU 2015-05, Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement, which provides guidance to customers about whether a cloud computing arrangement includes a software license that should be accounted for as internal-use software. Additionally, ASU 2015-05 supersedes the requirement in ASC 350-04 to determine the accounting for a software license by analogy to the lease classification test. The ASU 2015-05 is effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2015. Early adoption is permitted. Entities may adopt the guidance either (1) prospectively to arrangements entered into or materially modified after the effective date or (2) retrospectively. We are currently evaluating the impact ASU 2015-05 will have on our consolidated financial statements. Reclassifications Certain amounts in the 2014 financial statements have been reclassified to conform to the 2015 presentation format. Such reclassifications had no impact on the Company's net operations and stockholders' equity.

Summary of Significant Accounting Policies

Consolidated Financial Statements

The consolidated balance sheet at December 31, 2014 has been derived from audited consolidated financial statements and the consolidated interim financial statements included herein have been prepared without audit pursuant to the rules and regulations of the Securities and Exchange Commission (SEC). Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America (GAAP) have been condensed or omitted pursuant to such rules and regulations. These consolidated financial statements were prepared in accordance with GAAP for interim financial statements and with instructions for Form 10-Q and Regulation S-X Section 210.10-01. Further information on Metro Bancorp, Inc.'s (Metro or the Company) accounting policies are available in Note 1 (Significant Accounting Policies) of the Notes to Consolidated Financial Statements included in the Company's Annual Report on Form 10-K for the year ended December 31, 2014. The accompanying consolidated financial statements reflect all adjustments that are, in the opinion of management, necessary to reflect a fair statement of the results for the interim periods presented. Such adjustments are of a normal, recurring nature.

These consolidated financial statements should be read in conjunction with the audited consolidated financial statements and the notes thereto included in the Company's Annual Report on Form 10-K for the year ended December 31, 2014. Events occurring subsequent to the balance sheet date through the date of issuance have been evaluated for potential recognition or disclosure in the consolidated financial statements. The results for the nine months ended September 30, 2015 are not necessarily indicative of the results that may be expected for the year ending December 31, 2015.

The consolidated financial statements include the accounts of the Company and its consolidated subsidiaries including Metro Bank (the Bank). All material intercompany transactions have been eliminated.

Use of Estimates

The consolidated financial statements are prepared in conformity with GAAP. Accounting principles generally accepted in the United States of America require management to make estimates and assumptions that affect reported amounts of assets and liabilities and require disclosure of contingent assets and liabilities. In the opinion of management, all adjustments considered necessary for fair presentation have been included and are of a normal, recurring nature. Actual results could differ from these estimates. Material estimates that are particularly susceptible to significant change in the near term relate to the determination of the allowance for loan losses (allowance or ALL), impaired loans, the valuation of foreclosed assets, the valuation of securities available for sale, the valuation of deferred tax assets, the determination of other-than-temporary impairment (OTTI) on the Company's investment securities portfolio and other fair value measurements.

Recent Accounting Standards

In January 2014, the Financial Accounting Standards Board (FASB) issued ASU 2014-04, Reclassification of Residential Real Estate Collateralized Consumer Mortgage Loans upon Foreclosure, which clarifies when a creditor should be considered to have received physical possession of residential real estate property collateralizing a consumer mortgage loan such that the loan should be derecognized and the real estate property recognized. This guidance is effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2014. The Company adopted this guidance on January 1, 2015 using a prospective transition method; it did not have a material impact on our consolidated financial statements. The guidance requires disclosure of both (1) the amount of foreclosed residential real estate property held by the creditor and (2) the recorded investment in consumer mortgage loans collateralized by residential real estate property that are in the process of foreclosure. The Company has included these disclosures in Note 5 Foreclosed Assets.

In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606), which specifies how and when to recognize revenue and includes additional disclosures. On August 12, 2015, the FASB issued ASU 2015-14, which deferred the effective date of ASU 2014-09 to annual reporting periods beginning after December 15, 2017, including interim reporting periods within that reporting period. ASU 2014-09 allows for either full retrospective or modified retrospective application. Early application is not permitted. We are currently evaluating the impact ASU 2014-09 will have on our consolidated financial statements.

On April 7, 2015, the FASB issued ASU 2015-03, 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 instead of presented as a deferred charge. On August 18, 2015, the FASB issued ASU 2015-15, Presentation and Subsequent Measurement of Debt Issuance Costs Associated with Line-of-Credit Arrangements - Amendments to SEC Paragraphs Pursuant to Staff Announcement at June 18, 2015 EITF Meeting, which codifies SEC Staff Guidance related to issuance costs related to line-of-credit arrangements. For public business entities, the standards are 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 will be applied on a retrospective basis. We do not believe the adoption of this guidance will have a material impact on our consolidated financial statements.

On April 15, 2015, the FASB issued ASU 2015-05, Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement, which provides guidance to customers about whether a cloud computing arrangement includes a software license that should be accounted for as internal-use software. Additionally, ASU 2015-05 supersedes the requirement in ASC 350-04 to determine the accounting for a software license by analogy to the lease classification test. The ASU 2015-05 is effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2015. Early adoption is permitted. Entities may adopt the guidance either (1) prospectively to arrangements entered into or materially modified after the effective date or (2) retrospectively. We are currently evaluating the impact ASU 2015-05 will have on our consolidated financial statements.

Reclassifications

Certain amounts in the 2014 financial statements have been reclassified to conform to the 2015 presentation format. Such reclassifications had no impact on the Company's net operations and stockholders' equity.