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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, 2011 Month Year | Dec. 31, 2010 USD ($) | Dec. 31, 2010 EUR (€) | Dec. 31, 2011 Software Acquired or Developed for Internal Use Year | Dec. 31, 2011 BASE24 | Dec. 31, 2010 BASE24 | Dec. 31, 2009 BASE24 | Dec. 31, 2011 LTIP Performance Shares | Dec. 31, 2010 LTIP Performance Shares | Dec. 31, 2009 LTIP Performance Shares | Sep. 30, 2007 LTIP Performance Shares | Dec. 31, 2011 LTIP Performance Shares Minimum | Dec. 31, 2010 LTIP Performance Shares Minimum | Dec. 31, 2009 LTIP Performance Shares Minimum | Dec. 31, 2011 Restricted share awards (RSAs) | Dec. 31, 2010 Restricted share awards (RSAs) | Dec. 31, 2009 Restricted share awards (RSAs) | Dec. 31, 2011 Restricted share awards (RSAs) Minimum
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of total revenues from licensing BASE24 product line |  |  |  |  | 43.00% | 46.00% | 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% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Software estimated useful life |  |  |  | 3 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated useful lives of other intangible assets (in months), minimum | 18 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated useful lives of other intangible assets (in years), maximum | 10 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
LTIP Performance Shares, Performance period |  |  |  |  |  |  |  | 3 years | 3 years | 3 years | 3 years | 1 year | 1 year | 1 year |  |  |  |
Maximum attainment percentage that may be achieved for LTIP Performance Shares |  |  |  |  |  |  |  | 200.00% | 200.00% | 200.00% |  |  |  |  |  |  |  |
Incentive plan, requisite service period for awards granted |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3 years | 3 years | 4 years | 3 years
Restricted Share Awards, vesting increments on the anniversary dates of grants |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 33.00% | 33.00% | 25.00% | 25.00%

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- Definition Percentage of total revenues derived from licensing the BASE24 product line, which does not include the BASE24-eps product, and providing related services and maintenance. + References No definition available. + Details
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