Accounting Policies Recently Adopted and Pending Accounting Pronouncements	3 Months Ended
Mar. 31, 2014
Accounting Policies Recently Adopted and Pending Accounting Pronouncements [Abstract]
Accounting Policies Recently Adopted and Pending Accounting Pronouncements	Note 19 – Accounting Policies Recently Adopted and Pending Accounting Pronouncements ASU 2014-04, “Receivables – Troubled Debt Restructurings by Creditors (Subtopic 310-40): Reclassification of Residential Real Estate Collateralized Consumer Mortgage Loans upon Foreclosure (a consensus of the FASB Emerging Issues Task Force).” Issued in January 2014, ASU 2014-04 clarifies when an “in substance repossession or foreclosure” occurs, that is, when a creditor should be considered to have received physical possession of residential real estate property collateralizing a consumer mortgage loans, such that all or a portion of the loan should be derecognized and the real estate property recognized. ASU 2014-04 states that a creditor is considered to have received physical possession of residential real estate property collateralizing a consumer mortgage loan, upon either the creditor obtaining legal title to the residential real estate property upon completion of a foreclosure, or the borrower conveying all interest in the residential real estate property to the creditor to satisfy that loan through completion of a deed in lieu of foreclosure or through a similar legal agreement. The amendments of ASU 2014-04 also require interim and annual disclosure of both the amount of foreclosed residential real estate property held by the creditor and the recorded investment in consumer mortgage loans collateralized by residential real estate property that are in the process of foreclosure. The amendments of ASU 2014-04 are effective for interim and annual periods beginning after December 15, 2014, and may be applied using either a modified retrospective transition method or a prospective transition method as described in ASU 2014-04. For Trustmark, the adoption of ASU 2014-04 will be change in presentation only for the newly required disclosures and is not expect to have a significant impact to Trustmark’s consolidated financial statements. ASU 2014-01, “Investments – Equity Method and Joint Ventures (Topic 323): Accounting for Investments in Qualified Affordable Housing Projects (a consensus of the FASB Emerging Issues Task Force).” Issued in January 2014, ASU 2014-01 permits reporting entities that invest in qualified affordable housing projects to elect to account for those investments using the “proportional amortization method” if certain conditions are met. Under this method, an entity amortizes the initial cost of the investment in proportion to the tax credits and other tax benefits received and recognizes the net investment performance in the income statement as a component of income tax expense (benefit). The decision to apply the proportional amortization method of accounting is an accounting policy decision and should be applied consistently to all qualifying affordable housing project investments. ASU 2014-01 should be applied retrospectively to all periods presented and is effective for annual and interim reporting periods beginning after December 15, 2014. Trustmark currently accounts for its tax credit investments utilizing the equity method of accounting and does not have a significant amount of investments in qualified affordable housing projects that qualify for the low income housing tax credit. Management will review Trustmark’s investments in qualified affordable housing projects to determine if these investments meet the conditions required for using the proportional amortization method of accounting and make a decision regarding the accounting policy. The adoption of ASU 2014-01 is not expected to have a significant impact to Trustmark’s consolidated financial statements. ASU 2013-11, “Income Taxes (Topic 740): Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists (a consensus of the FASB Emerging Issues Task Force).” Issued in July 2013, ASU 2013-11 provides that an entity’s unrecognized tax benefit, or a portion of its unrecognized tax benefit, should be presented in its financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward, with one exception. The exception states that to the extent a net operating loss carryforward, a similar tax loss, or a tax credit carryforward is not available at the reporting date under the tax law of the applicable jurisdiction to settle any additional income taxes that would result from the disallowance of a tax position, or the tax law of the applicable jurisdiction does not require the entity to use, and the entity does not intend to use, the deferred tax asset for such purpose, the unrecognized tax benefit should be presented in the financial statements as a liability and should not be combined with deferred tax assets. ASU 2013-11 applies prospectively for all entities that have unrecognized tax benefits when a net operating loss carryforward, a similar tax loss, or tax credit carryforward exists at the reporting date. ASU 2013-11 became effective for Trustmark’s financial statements on January 1, 2014, and the adoption did not have a significant impact to Trustmark’s consolidated financial statements. ASU 2013-02, “Comprehensive Income (Topic 220): Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income.” Issued in February 2013, ASU 2013-02 requires an entity to report the effect of significant reclassifications out of accumulated other comprehensive income on net income line items only for those items that are reported in their entirety in net income in the period of reclassification. For these items, entities are required to disclose the effect of the reclassification on each line item of net income that is affected by the reclassification adjustment. For items that are not reclassified in their entirety into net income, an entity is required to add a cross-reference to the note that includes additional information about the effect of the reclassification. For entities that only have reclassifications into net income in their entirety, this information may be presented either in the notes or parenthetically on the face of the statement that reports net income as long as the required information is reported in a single location. Entities that have one or more reclassification items that are not presented in their entirety in net income in the period of reclassification must present this information in the notes to the financial statements. ASU 2013-02 became effective for Trustmark’s financial statements on January 1, 2013, and the adoption did not have a significant impact to Trustmark’s consolidated financial statements. The required disclosures are reported in Note 15 – Shareholders’ Equity. ASU 2013-01. “Balance Sheet (Topic 210): Clarifying the Scope of Disclosures about Offsetting Assets and Liabilities.” Issued in January 2013, ASU 2013-01 clarifies that the scope of ASU 2011-11, “Balance Sheet (Topic 210): Disclosures about Offsetting Assets and Liabilities,” applies to derivatives accounted for in accordance with FASB ASC Topic 815, including bifurcated embedded derivatives, repurchase agreements and reverse repurchase agreements, and securities borrowing and securities lending transactions that are either offset in accordance with Section 210-20-45 or Section 815-10-45 or subject to an enforceable master netting arrangement or similar agreements. ASU 2013-01 became effective for Trustmark’s financial statements on January 1, 2013, and the adoption did not have a significant impact to Trustmark’s consolidated financial statements. The required disclosures are reported in Note 17 – Derivatives.

Note 19 – Accounting Policies Recently Adopted and Pending Accounting Pronouncements

ASU 2014-04, “Receivables – Troubled Debt Restructurings by Creditors (Subtopic 310-40): Reclassification of Residential Real Estate Collateralized Consumer Mortgage Loans upon Foreclosure (a consensus of the FASB Emerging Issues Task Force).” Issued in January 2014, ASU 2014-04 clarifies when an “in substance repossession or foreclosure” occurs, that is, when a creditor should be considered to have received physical possession of residential real estate property collateralizing a consumer mortgage loans, such that all or a portion of the loan should be derecognized and the real estate property recognized. ASU 2014-04 states that a creditor is considered to have received physical possession of residential real estate property collateralizing a consumer mortgage loan, upon either the creditor obtaining legal title to the residential real estate property upon completion of a foreclosure, or the borrower conveying all interest in the residential real estate property to the creditor to satisfy that loan through completion of a deed in lieu of foreclosure or through a similar legal agreement. The amendments of ASU 2014-04 also require interim and annual disclosure of both the amount of foreclosed residential real estate property held by the creditor and the recorded investment in consumer mortgage loans collateralized by residential real estate property that are in the process of foreclosure. The amendments of ASU 2014-04 are effective for interim and annual periods beginning after December 15, 2014, and may be applied using either a modified retrospective transition method or a prospective transition method as described in ASU 2014-04. For Trustmark, the adoption of ASU 2014-04 will be change in presentation only for the newly required disclosures and is not expect to have a significant impact to Trustmark’s consolidated financial statements.

ASU 2014-01, “Investments – Equity Method and Joint Ventures (Topic 323): Accounting for Investments in Qualified Affordable Housing Projects (a consensus of the FASB Emerging Issues Task Force).” Issued in January 2014, ASU 2014-01 permits reporting entities that invest in qualified affordable housing projects to elect to account for those investments using the “proportional amortization method” if certain conditions are met. Under this method, an entity amortizes the initial cost of the investment in proportion to the tax credits and other tax benefits received and recognizes the net investment performance in the income statement as a component of income tax expense (benefit). The decision to apply the proportional amortization method of accounting is an accounting policy decision and should be applied consistently to all qualifying affordable housing project investments. ASU 2014-01 should be applied retrospectively to all periods presented and is effective for annual and interim reporting periods beginning after December 15, 2014. Trustmark currently accounts for its tax credit investments utilizing the equity method of accounting and does not have a significant amount of investments in qualified affordable housing projects that qualify for the low income housing tax credit. Management will review Trustmark’s investments in qualified affordable housing projects to determine if these investments meet the conditions required for using the proportional amortization method of accounting and make a decision regarding the accounting policy. The adoption of ASU 2014-01 is not expected to have a significant impact to Trustmark’s consolidated financial statements.

ASU 2013-11, “Income Taxes (Topic 740): Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists (a consensus of the FASB Emerging Issues Task Force).” Issued in July 2013, ASU 2013-11 provides that an entity’s unrecognized tax benefit, or a portion of its unrecognized tax benefit, should be presented in its financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward, with one exception. The exception states that to the extent a net operating loss carryforward, a similar tax loss, or a tax credit carryforward is not available at the reporting date under the tax law of the applicable jurisdiction to settle any additional income taxes that would result from the disallowance of a tax position, or the tax law of the applicable jurisdiction does not require the entity to use, and the entity does not intend to use, the deferred tax asset for such purpose, the unrecognized tax benefit should be presented in the financial statements as a liability and should not be combined with deferred tax assets. ASU 2013-11 applies prospectively for all entities that have unrecognized tax benefits when a net operating loss carryforward, a similar tax loss, or tax credit carryforward exists at the reporting date. ASU 2013-11 became effective for Trustmark’s financial statements on January 1, 2014, and the adoption did not have a significant impact to Trustmark’s consolidated financial statements.

ASU 2013-02, “Comprehensive Income (Topic 220): Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income.” Issued in February 2013, ASU 2013-02 requires an entity to report the effect of significant reclassifications out of accumulated other comprehensive income on net income line items only for those items that are reported in their entirety in net income in the period of reclassification. For these items, entities are required to disclose the effect of the reclassification on each line item of net income that is affected by the reclassification adjustment. For items that are not reclassified in their entirety into net income, an entity is required to add a cross-reference to the note that includes additional information about the effect of the reclassification. For entities that only have reclassifications into net income in their entirety, this information may be presented either in the notes or parenthetically on the face of the statement that reports net income as long as the required information is reported in a single location. Entities that have one or more reclassification items that are not presented in their entirety in net income in the period of reclassification must present this information in the notes to the financial statements. ASU 2013-02 became effective for Trustmark’s financial statements on January 1, 2013, and the adoption did not have a significant impact to Trustmark’s consolidated financial statements. The required disclosures are reported in Note 15 – Shareholders’ Equity.

ASU 2013-01. “Balance Sheet (Topic 210): Clarifying the Scope of Disclosures about Offsetting Assets and Liabilities.” Issued in January 2013, ASU 2013-01 clarifies that the scope of ASU 2011-11, “Balance Sheet (Topic 210): Disclosures about Offsetting Assets and Liabilities,” applies to derivatives accounted for in accordance with FASB ASC Topic 815, including bifurcated embedded derivatives, repurchase agreements and reverse repurchase agreements, and securities borrowing and securities lending transactions that are either offset in accordance with Section 210-20-45 or Section 815-10-45 or subject to an enforceable master netting arrangement or similar agreements. ASU 2013-01 became effective for Trustmark’s financial statements on January 1, 2013, and the adoption did not have a significant impact to Trustmark’s consolidated financial statements. The required disclosures are reported in Note 17 – Derivatives.