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Nature of Business and Summary of Significant Accounting Policies - Additional Information (Detail) In Millions, unless otherwise specified | 12 Months Ended
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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 |  |  |  |  |  |  |  |  |

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