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Network
2402405 - Disclosure - Summary of Significant Accounting Policies (Schedule of Allowance For Doubtful Accounts) (Details)
(http://www.comscore.com/role/SummaryOfSignificantAccountingPoliciesScheduleOfAllowanceForDoubtfulAccountsDetails)
Table(Implied)
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0001158172 (http://www.sec.gov/CIK)
Accounting Policies [Abstract]Period [Axis]
2012-01-01 - 2012-12-31
2011-01-01 - 2011-12-31
2010-01-01 - 2010-12-31
Accounting Policies [Abstract]
 
 
 
Allowance for Doubtful Accounts Receivable [Roll Forward]
 
 
 
Beginning Balance
(903,000) 
(725,000) 
(510,000) 
Additions
(1,429,000) 
(220,000) 
(167,000) 
Reductions, (recoveries) and write-offs
1,215,000  
42,000  
(48,000) 
Ending Balance
(1,117,000) 
 
(903,000) 
 
(725,000)