Concentration Risk

9 Months Ended

Sep. 30, 2011

Concentration Risk [Abstract]

Concentration Risk

14. Concentration Risk

Arbitron is an international media and marketing information services firm primarily serving radio, advertising agencies, cable and broadcast television, advertisers, retailers, out-of-home media, online media print media, and mobile media.

The Company’s quantitative radio audience ratings service and related software licensing revenue accounted for the following percentages, in the aggregate, of total Company revenue:

	Three Months Ended September 30,						Nine Months Ended September 30,
	2011			2010			2011			2010
Quantitative radio audience ratings service and related software licensing revenue		95	%		95	%		91	%		91	%

The Company had one customer that individually represented approximately 20% of its annual revenue for the year ended December 31, 2010. The Company had two customers that individually represented approximately 22% and 14% of its total accounts receivable as of September 30, 2011, and two customers that individually represented approximately 24% and 11% of its total accounts receivable as of December 31, 2010. The Company has historically experienced a high level of contract renewals.