BASIS OF PRESENTATION AND ORGANIZATION (Block)	12 Months Ended
Dec. 31, 2018
Organization Consolidation And Presentation Of Financial Statements Abstract
Business Description And Basis Of Presentation Text Block	1. BASIS OF PRESENTATION AND SIGNIFICANT POLICIES Nature of Business – Entercom Communications Corp. (the “Company”) is the second-largest radio broadcasting company in the United States. The Company is also a leading local media and entertainment company with a nationwide footprint of stations including positions in all of the top 16 markets and 22 of the top 25 markets. On February 2, 2017, the Company and its wholly-owned subsidiary (“Merger Sub”), entered into an Agreement and Plan of Merger (the “CBS Radio Merger Agreement”) with CBS Corporation (“CBS”) and its wholly-owned subsidiary CBS Radio Inc. (“CBS Radio”). Pursuant to the CBS Merger Agreement, Merger Sub merged with and into CBS Radio with CBS Radio surviving as the Company’s wholly-owned subsidiary (the “Merger”). On November 13, 2018, the Company changed the name of CBS Radio Inc. to Entercom Media Corp. The parties to the Merger believe that the Merger was tax-free to CBS and its shareholders. The Merger was effected through a stock for stock Reverse Morris Trust transaction. The Merger was subject to approval by the Company’s shareholders and customary regulatory approvals. As a result of the Merger, the Company would have owned radio stations in seven markets in excess of the limits set forth in the Federal Communications Commission’s (the “FCC”) local radio ownership rule. In order to comply with this FCC rule, and to obtain clearance for the Merger from the Antitrust Division of the U.S. Department of Justice (“DOJ”), the Company agreed to divest a total of nineteen stations in such markets, consisting of eight stations owned by the Company and eleven stations owned by CBS Radio. Refer to additional information on divestitures in Note 3, Business Combinations. On November 1, 2017, the Company entered into a settlement with the DOJ. On November 9, 2017, the FCC released an order, pursuant to the Communications Act of 1934, as amended, and the rules and regulations promulgated thereunder, approving the applications filed by CBS Radio and the Company requesting FCC consent to the CBS Radio Merger Agreement. Obtaining the FCC Consent, and its effectiveness in accordance with applicable law and the rules and regulations of the FCC, was a condition to the obligation of CBS, CBS Radio, the Company, and Merger Sub to the consummation of the Merger. On November 15, 2017, the Company’s shareholders voted to approve the Merger. Upon obtaining all required approvals, the Merger closed on November 17, 2017. The results of CBS Radio have been included in the Company’s consolidated financial statements since the date of acquisition. Refer to Note 3, Business Combinations, for additional information. The Company’s strategy focuses on providing compelling content in the communities it serves to enable the Company to offer its advertisers an effective marketing platform to reach a large targeted local audience. The principal components of the Company’s strategy are to: (i) focus on creating effective integrated marketing solutions for its customers that incorporate its audio, digital and experiential assets; (ii) build strongly-branded radio stations with highly compelling content; (iii) develop market leading station clusters; and (iv) recruit, develop, motivate and retain superior employees. Changes in Operating Segment Following the Company’s Merger with CBS Radio in November 2017, the Company’s radio broadcasting operations increased from 28 radio markets to 48 markets. In connection with the Merger, management further considered its operating segment and reportable segment conclusions. Management considered factors including, but not limited to: (i) the favorable impact of the significant synergies generated through more centralized operating activities; and (ii) how the value of the portfolio of radio markets is greater than the sum of the value of the individual radio markets in that portfolio. These factors impacted how the Chief Operating Decision Maker (“CODM”) evaluates the results of a significantly larger company and how operating decisions are made, which are now performed at the Company level. This approach is consistent with how operating and capital investment decisions are made as needed, at the Company level, irrespective of any given market’s size or location. Furthermore, technological enhancements and systems integration decisions are reached at the Company level and applied to all markets rather than to specific or individual markets to ensure that each market has the same tools and opportunities as every other market. Management also considered its organizational structure in assessing its operating segments and reportable segments. Managers at the market level are often responsible for the operational oversight of multiple markets, the assignment of which is neither dependent upon geographical region nor size. Managers at the market level do not report to the CODM and instead report to other senior management, who are responsible for the operational oversight of all 48 radio markets and for communication of results to the CODM. After consideration of the above, the Company changed its operating segment conclusions during the second quarter of 2018. The Company now has one operating segment and continues to have one reportable segment. Changes in Accounting Policies – Revenue Recognition The Company adopted the amended accounting guidance for revenue recognition on January 1, 2018 using the modified retrospective transition method, without a need to make a cumulative-effect adjustment to retained earnings as of the effective date. As a result, the Company has changed its accounting policy for revenue recognition as described below. Except for the changes below, the Company has consistently applied its accounting policies to all periods presented in these consolidated financial statements. Refer to Note 4, Revenue, for additional information. Under certain practical expedients elected, the Company did not disclose the amount of consideration allocated to the remaining performance obligations or an explanation of when the Company expects to recognize that amount as revenue for all reporting periods presented before January 1, 2018. Results for reporting periods beginning after January 1, 2018 are presented under the amended accounting guidance, while prior period amounts are not adjusted and continue to be reported in accordance with the Company’s historical accounting guidance. Based upon the Company’s assessment, the impact of this guidance is not material to the Company’s financial position, results of operations or cash flows through December 31, 2018. The Company recognizes revenue when it satisfies a performance obligation by transferring control over a product or service to a customer, in an amount that reflects the consideration it expects to be entitled to in exchange for those products or services. Revenues presented in the consolidated financial statements are reflected on a net basis, after the deduction of advertising agency fees by the advertising agencies. The Company also evaluates when it is appropriate to recognize revenue based on the gross amount invoiced to the customer or the net amount retained by the Company if a third party is involved. Reclassifications Certain reclassifications have been made to the prior years’ statements of cash flow and notes to the consolidated financial statements to conform to the presentation in the current year, which did not have a material impact on the Company’s previously reported financial statements.

Nature of Business – Entercom Communications Corp. (the “Company”) is the second-largest radio broadcasting company in the United States. The Company is also a leading local media and entertainment company with a nationwide footprint of stations including positions in all of the top 16 markets and 22 of the top 25 markets.

On February 2, 2017, the Company and its wholly-owned subsidiary (“Merger Sub”), entered into an Agreement and Plan of Merger (the “CBS Radio Merger Agreement”) with CBS Corporation (“CBS”) and its wholly-owned subsidiary CBS Radio Inc. (“CBS Radio”). Pursuant to the CBS Merger Agreement, Merger Sub merged with and into CBS Radio with CBS Radio surviving as the Company’s wholly-owned subsidiary (the “Merger”). On November 13, 2018, the Company changed the name of CBS Radio Inc. to Entercom Media Corp. The parties to the Merger believe that the Merger was tax-free to CBS and its shareholders. The Merger was effected through a stock for stock Reverse Morris Trust transaction.

The Merger was subject to approval by the Company’s shareholders and customary regulatory approvals. As a result of the Merger, the Company would have owned radio stations in seven markets in excess of the limits set forth in the Federal Communications Commission’s (the “FCC”) local radio ownership rule. In order to comply with this FCC rule, and to obtain clearance for the Merger from the Antitrust Division of the U.S. Department of Justice (“DOJ”), the Company agreed to divest a total of nineteen stations in such markets, consisting of eight stations owned by the Company and eleven stations owned by CBS Radio. Refer to additional information on divestitures in Note 3, Business Combinations.

On November 1, 2017, the Company entered into a settlement with the DOJ. On November 9, 2017, the FCC released an order, pursuant to the Communications Act of 1934, as amended, and the rules and regulations promulgated thereunder, approving the applications filed by CBS Radio and the Company requesting FCC consent to the CBS Radio Merger Agreement. Obtaining the FCC Consent, and its effectiveness in accordance with applicable law and the rules and regulations of the FCC, was a condition to the obligation of CBS, CBS Radio, the Company, and Merger Sub to the consummation of the Merger. On November 15, 2017, the Company’s shareholders voted to approve the Merger.

Upon obtaining all required approvals, the Merger closed on November 17, 2017. The results of CBS Radio have been included in the Company’s consolidated financial statements since the date of acquisition. Refer to Note 3, Business Combinations, for additional information.

The Company’s strategy focuses on providing compelling content in the communities it serves to enable the Company to offer its advertisers an effective marketing platform to reach a large targeted local audience. The principal components of the Company’s strategy are to: (i) focus on creating effective integrated marketing solutions for its customers that incorporate its audio, digital and experiential assets; (ii) build strongly-branded radio stations with highly compelling content; (iii) develop market leading station clusters; and (iv) recruit, develop, motivate and retain superior employees.

Changes in Operating Segment

Following the Company’s Merger with CBS Radio in November 2017, the Company’s radio broadcasting operations increased from 28 radio markets to 48 markets. In connection with the Merger, management further considered its operating segment and reportable segment conclusions.

Management considered factors including, but not limited to: (i) the favorable impact of the significant synergies generated through more centralized operating activities; and (ii) how the value of the portfolio of radio markets is greater than the sum of the value of the individual radio markets in that portfolio. These factors impacted how the Chief Operating Decision Maker (“CODM”) evaluates the results of a significantly larger company and how operating decisions are made, which are now performed at the Company level.

This approach is consistent with how operating and capital investment decisions are made as needed, at the Company level, irrespective of any given market’s size or location. Furthermore, technological enhancements and systems integration decisions are reached at the Company level and applied to all markets rather than to specific or individual markets to ensure that each market has the same tools and opportunities as every other market. Management also considered its organizational structure in assessing its operating segments and reportable segments. Managers at the market level are often responsible for the operational oversight of multiple markets, the assignment of which is neither dependent upon geographical region nor size. Managers at the market level do not report to the CODM and instead report to other senior management, who are responsible for the operational oversight of all 48 radio markets and for communication of results to the CODM.

After consideration of the above, the Company changed its operating segment conclusions during the second quarter of 2018. The Company now has one operating segment and continues to have one reportable segment.

Changes in Accounting Policies – Revenue Recognition

The Company adopted the amended accounting guidance for revenue recognition on January 1, 2018 using the modified retrospective transition method, without a need to make a cumulative-effect adjustment to retained earnings as of the effective date. As a result, the Company has changed its accounting policy for revenue recognition as described below. Except for the changes below, the Company has consistently applied its accounting policies to all periods presented in these consolidated financial statements. Refer to Note 4, Revenue, for additional information.

Under certain practical expedients elected, the Company did not disclose the amount of consideration allocated to the remaining performance obligations or an explanation of when the Company expects to recognize that amount as revenue for all reporting periods presented before January 1, 2018.

Results for reporting periods beginning after January 1, 2018 are presented under the amended accounting guidance, while prior period amounts are not adjusted and continue to be reported in accordance with the Company’s historical accounting guidance. Based upon the Company’s assessment, the impact of this guidance is not material to the Company’s financial position, results of operations or cash flows through December 31, 2018.

The Company recognizes revenue when it satisfies a performance obligation by transferring control over a product or service to a customer, in an amount that reflects the consideration it expects to be entitled to in exchange for those products or services.

Revenues presented in the consolidated financial statements are reflected on a net basis, after the deduction of advertising agency fees by the advertising agencies. The Company also evaluates when it is appropriate to recognize revenue based on the gross amount invoiced to the customer or the net amount retained by the Company if a third party is involved.