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Subsequent Events - Additional Information (Detail) (International Business Machines, USD $) In Millions, unless otherwise specified | 1 Months Ended
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Apr. 01, 2012
International Business Machines |
Subsequent Event [Line Items] |
Services agreement, expected termination fee | $ 3.0
Services agreement, effective termination date | 2013-01-31

X
- Definition Agreement Termination Date + References No definition available. + Details
Name: | aciw_AgreementTerminationDate
Namespace Prefix: | aciw_
Data Type: | us-types:dateStringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Contractual termination fee to be paid by the Company to International Business Machines for the termination of the outsourcing agreement. + References No definition available. + Details
Name: | aciw_OutsourcingAgreementTerminationFee
Namespace Prefix: | aciw_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration