BASIS OF PRESENTATION AND ORGANIZATION (Block)	9 Months Ended
Sep. 30, 2011
Organization Consolidation And Presentation Of Financial Statements Abstract
Business Description And Basis Of Presentation Text Block	1. BASIS OF PRESENTATION The condensed consolidated interim unaudited financial statements included herein have been prepared by Entercom Communications Corp. and its subsidiaries (collectively, the “Company”) in accordance with: (i) generally accepted accounting principles (“U.S. GAAP”) for interim financial information; and (ii) the instructions of the Securities and Exchange Commission (the “SEC”) for Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by generally accepted accounting principles for annual financial statements. In the opinion of management, the financial statements reflect all adjustments considered necessary for a fair statement of the results of operations and financial position for the interim periods presented. All such adjustments are of a normal and recurring nature. The Company's results are subject to seasonal fluctuations and, therefore, the results shown on an interim basis are not necessarily indicative of results for a full year. This Form 10-Q should be read in conjunction with the financial statements and related notes included in the Company's audited financial statements as of and for the year ended December 31, 2010 and filed with the SEC on February 9, 2011, as part of the Company's Annual Report on Form 10-K. Certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to such rules and regulations. Recent Accounting Pronouncements Other than as disclosed below, the Company does not believe that any recently issued pronouncements would have a material effect on the Company's results of operations, cash flows or financial condition. Goodwill Testing In September 2011, the accounting guidance for how an entity tests goodwill for impairment was revised to simplify the procedures. The amendments will allow an entity to first assess qualitative factors to determine whether it is necessary to perform the two-step quantitative goodwill impairment test. An entity no longer will be required to calculate the fair value of a reporting unit unless the entity determines, based on a qualitative assessment, that it is more likely than not that its fair value is less than its carrying amount. Prior to this decision, entities were required to test goodwill for impairment, on at least an annual basis, by first comparing the fair value of a reporting unit with its carrying amount, including goodwill. If the fair value of a reporting unit is less than its carrying amount, then the second step of the test is performed to measure the amount of impairment loss, if any. The Company anticipates that this guidance should not change the goodwill impairment testing results reached through either the simplified method of testing versus the existing method of testing. This guidance will be effective for the Company on January 1, 2012. Presentation Of Comprehensive Income In June 2011, the accounting standards for the presentation of comprehensive income were amended. This guidance seeks to improve the comparability, consistency and transparency of financial reporting and increases the prominence of items reported in other comprehensive income. In October 2011, the accounting standards were modified to defer the specific requirement to present items that are reclassified from other comprehensive income to net income alongside their respective components of net income and other comprehensive income. The guidance provided by this update will be effective for the Company on January 1, 2012. Since this guidance will only change the format of financial statements, it is expected that the adoption of this guidance will not have a material effect on the Company's results of operations, cash flows or financial condition. Disclosure Of Fair Value Measurements In May 2011, the accounting standards for fair value measurements were amended to clarify existing guidance and require certain new quantitative and qualitative disclosures regarding unobservable fair value measurements. The guidance provided by this update will be effective for the Company on January 1, 2012. Since this guidance will only require additional disclosures, it is expected that this will not have a material effect on the Company's results of operations, cash flows or financial condition. Reclassifications Certain reclassifications have been made to the prior year's financial statements to conform to the presentation in the current year. Prior Period Correction During the nine months ended September 30, 2011, the Company recorded a prior period correction to income tax expense and to other comprehensive income (loss) as described in Note 13, Income Taxes, and Note 14, Accumulated Other Comprehensive Income (Loss), respectively.

BASIS OF PRESENTATION AND ORGANIZATION (Block)

9 Months Ended

Sep. 30, 2011

Organization Consolidation And Presentation Of Financial Statements Abstract

Business Description And Basis Of Presentation Text Block

1. BASIS OF PRESENTATION

The condensed consolidated interim unaudited financial statements included herein have been prepared by Entercom Communications Corp. and its subsidiaries (collectively, the “Company”) in accordance with: (i) generally accepted accounting principles (“U.S. GAAP”) for interim financial information; and (ii) the instructions of the Securities and Exchange Commission (the “SEC”) for Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by generally accepted accounting principles for annual financial statements. In the opinion of management, the financial statements reflect all adjustments considered necessary for a fair statement of the results of operations and financial position for the interim periods presented. All such adjustments are of a normal and recurring nature. The Company's results are subject to seasonal fluctuations and, therefore, the results shown on an interim basis are not necessarily indicative of results for a full year.

This Form 10-Q should be read in conjunction with the financial statements and related notes included in the Company's audited financial statements as of and for the year ended December 31, 2010 and filed with the SEC on February 9, 2011, as part of the Company's Annual Report on Form 10-K. Certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to such rules and regulations.

Recent Accounting Pronouncements

Other than as disclosed below, the Company does not believe that any recently issued pronouncements would have a material effect on the Company's results of operations, cash flows or financial condition.

Goodwill Testing

In September 2011, the accounting guidance for how an entity tests goodwill for impairment was revised to simplify the procedures. The amendments will allow an entity to first assess qualitative factors to determine whether it is necessary to perform the two-step quantitative goodwill impairment test. An entity no longer will be required to calculate the fair value of a reporting unit unless the entity determines, based on a qualitative assessment, that it is more likely than not that its fair value is less than its carrying amount. Prior to this decision, entities were required to test goodwill for impairment, on at least an annual basis, by first comparing the fair value of a reporting unit with its carrying amount, including goodwill. If the fair value of a reporting unit is less than its carrying amount, then the second step of the test is performed to measure the amount of impairment loss, if any. The Company anticipates that this guidance should not change the goodwill impairment testing results reached through either the simplified method of testing versus the existing method of testing. This guidance will be effective for the Company on January 1, 2012.

Presentation Of Comprehensive Income

In June 2011, the accounting standards for the presentation of comprehensive income were amended. This guidance seeks to improve the comparability, consistency and transparency of financial reporting and increases the prominence of items reported in other comprehensive income. In October 2011, the accounting standards were modified to defer the specific requirement to present items that are reclassified from other comprehensive income to net income alongside their respective components of net income and other comprehensive income. The guidance provided by this update will be effective for the Company on January 1, 2012. Since this guidance will only change the format of financial statements, it is expected that the adoption of this guidance will not have a material effect on the Company's results of operations, cash flows or financial condition.

Disclosure Of Fair Value Measurements

In May 2011, the accounting standards for fair value measurements were amended to clarify existing guidance and require certain new quantitative and qualitative disclosures regarding unobservable fair value measurements. The guidance provided by this update will be effective for the Company on January 1, 2012. Since this guidance will only require additional disclosures, it is expected that this will not have a material effect on the Company's results of operations, cash flows or financial condition.

Reclassifications

Certain reclassifications have been made to the prior year's financial statements to conform to the presentation in the current year.

Prior Period Correction

During the nine months ended September 30, 2011, the Company recorded a prior period correction to income tax expense and to other comprehensive income (loss) as described in Note 13, Income Taxes, and Note 14, Accumulated Other Comprehensive Income (Loss), respectively.