Basis of Presentation (Policies)	6 Months Ended
Jun. 30, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Effect of New Financial Accounting Standards	Effect of New Financial Accounting Standards In July 2012, the FASB issued ASU No. 2012-02, "Testing Indefinite-Lived Intangible Assets for Impairment," which permits an entity to make a qualitative assessment to determine whether it is more likely than not that an indefinite-lived intangible asset, other than goodwill, is impaired. Currently, entities are required to quantitatively test indefinite-lived intangible assets for impairment at least annually and more frequently if indicators of impairment exist. Under the new standard, if an entity concludes, based on an evaluation of all relevant qualitative factors, that it is not more likely than not that the fair value of an indefinite-lived intangible asset is less than its carrying amount, it will not be required to perform the quantitative impairment test for that asset. Heartland adopted this standard on January 1, 2013, and the adoption did not have an impact on the results of operations, financial position and liquidity. In September 2012, the FASB issued ASU No. 2012-06, "Subsequent Accounting for an Indemnification Asset Recognized at the Acquisition Date as a Result of a Government-Assisted Acquisition of a Financial Institution," to address diversity in practice about how to subsequently measure an indemnification asset for a government-assisted acquisition that includes a loss-sharing agreement. This guidance requires a reporting entity to account for a change in the subsequent measurement of the indemnification asset on the same basis as the changes in the asset subject to indemnification. Heartland adopted this standard on January 1, 2013, and the adoption did not have a material impact on the accounting for its loss share receivable from the FDIC under its various loss share agreements. In February 2013, the FASB issued ASU No. 2013-02, "Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income," to address further disclosure of reclassification amounts out of other comprehensive income. The guidance requires that a reporting entity present, either in a single note or parenthetically on the face of the financial statements, the effect of significant amounts reclassified from each component of accumulated other comprehensive income based on its source and income statement line items affected by the reclassification. Heartland adopted this standard on January 1, 2013, and the adoption did not have an impact on the results of operations, financial position and liquidity. In July 2013, the FASB issued ASU No. 2013-11, "Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Tax Credit Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists," to eliminate the diversity in practice and to increase the comparability of financial statements among companies. The guidance requires that a reporting entity generally must show an unrecognized tax benefit, or a portion of an unrecognized tax benefit, for a net operating loss, or NOL, carryforward, similar tax loss or tax credit carryforward as a reduction of a deferred tax asset. However, the entity should present the unrecognized tax benefit as a liability and not as a reduction of a deferred tax asset if the carryforward or tax loss is not available on the financial statement date to settle any additional income tax liability that would result from the disallowance of the tax position under the applicable tax law, or the applicable tax law does not require the company to use, and the company does not intend to use, the carryforward or tax loss to settle additional income taxes resulting from the disallowance of the tax position. The guidance does not require any new recurring disclosures because it does not affect the recognition or measurement of uncertain tax positions. The new standard is effective for fiscal years, and interim periods within those years, beginning after December 15, 2013, and should be applied prospectively to all unrecognized tax benefits that exist at the effective date. Early adoption and retrospective application are both permitted. Heartland does not expect the adoption of this standard to have a material impact on the results of operations, financial position, and liquidity.

Effect of New Financial Accounting Standards

In July 2012, the FASB issued ASU No. 2012-02, "Testing Indefinite-Lived Intangible Assets for Impairment," which permits an entity to make a qualitative assessment to determine whether it is more likely than not that an indefinite-lived intangible asset, other than goodwill, is impaired. Currently, entities are required to quantitatively test indefinite-lived intangible assets for impairment at least annually and more frequently if indicators of impairment exist. Under the new standard, if an entity concludes, based on an evaluation of all relevant qualitative factors, that it is not more likely than not that the fair value of an indefinite-lived intangible asset is less than its carrying amount, it will not be required to perform the quantitative impairment test for that asset. Heartland adopted this standard on January 1, 2013, and the adoption did not have an impact on the results of operations, financial position and liquidity.

In September 2012, the FASB issued ASU No. 2012-06, "Subsequent Accounting for an Indemnification Asset Recognized at the Acquisition Date as a Result of a Government-Assisted Acquisition of a Financial Institution," to address diversity in practice about how to subsequently measure an indemnification asset for a government-assisted acquisition that includes a loss-sharing agreement. This guidance requires a reporting entity to account for a change in the subsequent measurement of the indemnification asset on the same basis as the changes in the asset subject to indemnification. Heartland adopted this standard on January 1, 2013, and the adoption did not have a material impact on the accounting for its loss share receivable from the FDIC under its various loss share agreements.

In February 2013, the FASB issued ASU No. 2013-02, "Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income," to address further disclosure of reclassification amounts out of other comprehensive income. The guidance requires that a reporting entity present, either in a single note or parenthetically on the face of the financial statements, the effect of significant amounts reclassified from each component of accumulated other comprehensive income based on its source and income statement line items affected by the reclassification. Heartland adopted this standard on January 1, 2013, and the adoption did not have an impact on the results of operations, financial position and liquidity.

In July 2013, the FASB issued ASU No. 2013-11, "Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Tax Credit Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists," to eliminate the diversity in practice and to increase the comparability of financial statements among companies. The guidance requires that a reporting entity generally must show an unrecognized tax benefit, or a portion of an unrecognized tax benefit, for a net operating loss, or NOL, carryforward, similar tax loss or tax credit carryforward as a reduction of a deferred tax asset. However, the entity should present the unrecognized tax benefit as a liability and not as a reduction of a deferred tax asset if the carryforward or tax loss is not available on the financial statement date to settle any additional income tax liability that would result from the disallowance of the tax position under the applicable tax law, or the applicable tax law does not require the company to use, and the company does not intend to use, the carryforward or tax loss to settle additional income taxes resulting from the disallowance of the tax position. The guidance does not require any new recurring disclosures because it does not affect the recognition or measurement of uncertain tax positions. The new standard is effective for fiscal years, and interim periods within those years, beginning after December 15, 2013, and should be applied prospectively to all unrecognized tax benefits that exist at the effective date. Early adoption and retrospective application are both permitted. Heartland does not expect the adoption of this standard to have a material impact on the results of operations, financial position, and liquidity.