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International Business Machines Corporation Alliance (Tables) | 12 Months Ended
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Dec. 31, 2011
Changes in Alliance Agreement Liability | Changes in the Alliance agreement liability were as follows (in thousands):
|  |  | September 30, |
|  | Alliance |
|  | Agreement |
|  | Liability |
Balance, December 31, 2009 |  | $ | 32,487 |
Costs related to fulfillment of technical enablement milestones |  |  | (9,903 | )
Balance, December 31, 2010 |  |  | 22,584 |
Costs related to fulfillment of technical enablement milestones |  |  | (1,917 | )
Balance, December 31, 2011 |  | $ | 20,667 |

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- Definition Tabular disclosure of the Alliance agreement liability. + References No definition available. + Details
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Namespace Prefix: | aciw_
Data Type: | nonnum:textBlockItemType
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Period Type: | duration