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Business Combinations - Additional Information (Detail)
1 Months Ended
Jan. 31, 2011
Aprimo Inc
Apr. 30, 2011
Aster Data Systems, Inc.
Jun. 30, 2012
ecircle Beteiligungs Gmbh
Series of Individually Immaterial Business Acquisitions
Business Acquisition      
Percentage of stock acquired 100.00%   100.00%
Acquisition date of business 2011-01 2011-04  
Pre-existing equity investment   11.20%