Document And Entity Information - shares	6 Months Ended
	Jun. 30, 2015	Jul. 31, 2015
Document Information [Line Items]
Entity Registrant Name	RADIO ONE, INC.
Entity Central Index Key	0001041657
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Trading Symbol	ROIA
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2015
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2015
Common Class A [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		2,123,698
Common Class B [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		2,861,843
Common Class C [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		2,928,906
Common Class D [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		41,951,850