Nature of Business and Summary of Significant Accounting Policies - Additional Information (Detail) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010 USD ($)	Dec. 31, 2010 EUR (€)	Dec. 31, 2012 Minimum	Dec. 31, 2012 Maximum	Dec. 31, 2012 Software Acquired or Developed for Internal Use	Dec. 31, 2012 BASE24	Dec. 31, 2011 BASE24	Dec. 31, 2010 BASE24
Business And Summary Of Significant Accounting Policies [Line Items]
Percentage of total revenues from licensing BASE24 product line								32.00%	43.00%	46.00%
Payment to dissolve partnership based in Madrid, Spain with Sistema 4B, S.A. ("Sistema")			$ 1.2	€ 1.0
Percent of accounts receivable balance accounted for one customer in Americas reportable segment		12.60%
Percentage of accounts receivable not exceeded by single customer	10.00%
Estimated useful lives of other intangible assets					3 years	20 years	3 years
Goodwill measurement period	1 year