BASIS OF PRESENTATION AND ORGANIZATION (Block)	12 Months Ended
Dec. 31, 2011
Organization Consolidation And Presentation Of Financial Statements Abstract
Business Description And Basis Of Presentation Text Block	1. BASIS OF PRESENTATION AND ORGANIZATION Nature Of Business – Entercom Communications Corp. (the “Company”) is one of the five largest radio broadcasting companies in the United States with a nationwide portfolio in excess of 100 stations in 23 markets, including San Francisco, Boston, Seattle, Denver, Portland, Sacramento and Kansas City.

The entire disclosure for the business description and basis of presentation concepts. Business description describes the nature and type of organization including but not limited to organizational structure as may be applicable to holding companies, parent and subsidiary relationships, business divisions, business units, business segments, affiliates and information about significant ownership of the reporting entity. Basis of presentation describes the underlying basis used to prepare the financial statements (for example, US Generally Accepted Accounting Principles, Other Comprehensive Basis of Accounting, IFRS).

No definition available.

Name:	us-gaap_BusinessDescriptionAndBasisOfPresentationTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration