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Segment Information - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2013
Segment
Dec. 31, 2012
Dec. 31, 2011
Segment Reporting Information [Line Items]                      
Number of geographic regions considered as reportable operating segments                 3    
Revenues $ 283,162 $ 213,939 $ 205,830 $ 161,997 $ 224,095 $ 155,062 $ 149,797 $ 137,625 $ 864,928 $ 666,579 $ 465,095
BASE24
                     
Segment Reporting Information [Line Items]                      
Percentage of total revenues from licensing BASE24 product line                 28.00% 32.00% 43.00%
Geographic Concentration Risk
                     
Segment Reporting Information [Line Items]                      
Percentage of revenues                 No country outside of the United States accounted for more than 10% of the Company's consolidated revenues during the years ended December 31, 2013, 2012 and 2011. No country outside of the United States accounted for more than 10% of the Company's consolidated revenues during the years ended December 31, 2013, 2012 and 2011. No country outside of the United States accounted for more than 10% of the Company's consolidated revenues during the years ended December 31, 2013, 2012 and 2011.
Customer Concentration Risk
                     
Segment Reporting Information [Line Items]                      
Percentage of revenues                 No single customer accounted for more than 10% of the Company's consolidated revenues during the years ended December 31, 2013, 2012 and 2011. No single customer accounted for more than 10% of the Company's consolidated revenues during the years ended December 31, 2013, 2012 and 2011. No single customer accounted for more than 10% of the Company's consolidated revenues during the years ended December 31, 2013, 2012 and 2011.
Americas - United States
                     
Segment Reporting Information [Line Items]                      
Revenues                 $ 450,300 $ 277,800 $ 188,000