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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)
12 Months Ended
Dec. 31, 2011
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES  
Schedule of estimated useful lives of property and equipment
Asset Category
  Estimated
Useful Lives

Buildings and leasehold improvements

  3 to 39 Years

Computer equipment and capitalized software

  2 to 3 Years

Furniture and other equipment

  3 to 10 Years
Schedule of operating segments, reporting units and reportable segments
Operating Segment
and
Reporting Unit
  Reportable
Segment
IAC Search & Media   Search & Applications
Match   Match
HomeAdvisor   Local
CityGrid Media   Local
Connected Ventures   Media
DailyBurn   Media
Shoebuy   Other