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Preliminary Purchase Price Allocation of S1 Corporation and Distra Pty Ltd (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2013 | Dec. 31, 2014 | Dec. 31, 2011
Business Acquisition [Line Items] |  |  |
Goodwill | 669,217 us-gaap_Goodwill | $ 781,163 us-gaap_Goodwill | $ 501,141 us-gaap_Goodwill
S1 Corporation |  |  |
Business Acquisition [Line Items] |  |  |
Cash and cash equivalents | 97,748 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents / us-gaap_BusinessAcquisitionAxis = aciw_SOneCorporationMember |  |
Billed and accrued receivables, net | 65,329 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables / us-gaap_BusinessAcquisitionAxis = aciw_SOneCorporationMember |  |
Other current assets | 16,791 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsPrepaidExpenseAndOtherAssets / us-gaap_BusinessAcquisitionAxis = aciw_SOneCorporationMember |  |
Total current assets acquired | 179,868 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssets / us-gaap_BusinessAcquisitionAxis = aciw_SOneCorporationMember |  |
Property and equipment | 18,440 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment / us-gaap_BusinessAcquisitionAxis = aciw_SOneCorporationMember |  |
Goodwill | 256,244 us-gaap_Goodwill / us-gaap_BusinessAcquisitionAxis = aciw_SOneCorporationMember |  |
Deferred income tax | 40,634 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssetsNoncurrent / us-gaap_BusinessAcquisitionAxis = aciw_SOneCorporationMember |  |
Other noncurrent assets | 11,004 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets / us-gaap_BusinessAcquisitionAxis = aciw_SOneCorporationMember |  |
Total assets acquired | 707,257 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets / us-gaap_BusinessAcquisitionAxis = aciw_SOneCorporationMember |  |
Deferred revenue | 34,671 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesDeferredRevenue / us-gaap_BusinessAcquisitionAxis = aciw_SOneCorporationMember |  |
Accrued employee compensation | 34,689 aciw_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAccruedEmployeeCompensation / us-gaap_BusinessAcquisitionAxis = aciw_SOneCorporationMember |  |
Other current liabilities | 28,387 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther / us-gaap_BusinessAcquisitionAxis = aciw_SOneCorporationMember |  |
Total current liabilities acquired | 97,747 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities / us-gaap_BusinessAcquisitionAxis = aciw_SOneCorporationMember |  |
Deferred income tax | 15,795 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilitiesNoncurrent / us-gaap_BusinessAcquisitionAxis = aciw_SOneCorporationMember |  |
Other noncurrent liabilities acquired | 6,431 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther / us-gaap_BusinessAcquisitionAxis = aciw_SOneCorporationMember |  |
Total liabilities acquired | 119,973 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities / us-gaap_BusinessAcquisitionAxis = aciw_SOneCorporationMember |  |
Net assets acquired | 587,284 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet / us-gaap_BusinessAcquisitionAxis = aciw_SOneCorporationMember |  |
S1 Corporation | Software |  |  |
Business Acquisition [Line Items] |  |  |
Amortizable intangible assets | 87,517 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles / us-gaap_BusinessAcquisitionAxis = aciw_SOneCorporationMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_ComputerSoftwareIntangibleAssetMember |  |
S1 Corporation | Software | Minimum |  |  |
Business Acquisition [Line Items] |  |  |
Acquired intangible assets, weighted-average useful lives | 5 years |  |
S1 Corporation | Software | Maximum |  |  |
Business Acquisition [Line Items] |  |  |
Acquired intangible assets, weighted-average useful lives | 10 years |  |
S1 Corporation | Customer relationships |  |  |
Business Acquisition [Line Items] |  |  |
Amortizable intangible assets | 108,690 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles / us-gaap_BusinessAcquisitionAxis = aciw_SOneCorporationMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember |  |
S1 Corporation | Customer relationships | Minimum |  |  |
Business Acquisition [Line Items] |  |  |
Acquired intangible assets, weighted-average useful lives | 10 years |  |
S1 Corporation | Customer relationships | Maximum |  |  |
Business Acquisition [Line Items] |  |  |
Acquired intangible assets, weighted-average useful lives | 20 years |  |
S1 Corporation | Trademarks |  |  |
Business Acquisition [Line Items] |  |  |
Acquired intangible assets, weighted-average useful lives | 3 years |  |
Amortizable intangible assets | 4,500 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles / us-gaap_BusinessAcquisitionAxis = aciw_SOneCorporationMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TrademarksMember |  |
S1 Corporation | Covenant not to compete |  |  |
Business Acquisition [Line Items] |  |  |
Acquired intangible assets, weighted-average useful lives | 3 years |  |
Amortizable intangible assets | 360 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles / us-gaap_BusinessAcquisitionAxis = aciw_SOneCorporationMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_NoncompeteAgreementsMember |  |
Distra Pty Ltd |  |  |
Business Acquisition [Line Items] |  |  |
Cash and cash equivalents | 2 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents / us-gaap_BusinessAcquisitionAxis = aciw_DistraPtyLtdMember |  |
Billed and accrued receivables, net | 338 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables / us-gaap_BusinessAcquisitionAxis = aciw_DistraPtyLtdMember |  |
Other current assets | 1,152 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsPrepaidExpenseAndOtherAssets / us-gaap_BusinessAcquisitionAxis = aciw_DistraPtyLtdMember |  |
Total current assets acquired | 1,492 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssets / us-gaap_BusinessAcquisitionAxis = aciw_DistraPtyLtdMember |  |
Property and equipment | 96 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment / us-gaap_BusinessAcquisitionAxis = aciw_DistraPtyLtdMember |  |
Goodwill | 21,307 us-gaap_Goodwill / us-gaap_BusinessAcquisitionAxis = aciw_DistraPtyLtdMember |  |
Deferred income tax | 12,331 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssetsNoncurrent / us-gaap_BusinessAcquisitionAxis = aciw_DistraPtyLtdMember |  |
Total assets acquired | 60,228 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets / us-gaap_BusinessAcquisitionAxis = aciw_DistraPtyLtdMember |  |
Deferred revenue | 320 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesDeferredRevenue / us-gaap_BusinessAcquisitionAxis = aciw_DistraPtyLtdMember |  |
Accrued employee compensation | 1,205 aciw_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAccruedEmployeeCompensation / us-gaap_BusinessAcquisitionAxis = aciw_DistraPtyLtdMember |  |
Other current liabilities | 736 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther / us-gaap_BusinessAcquisitionAxis = aciw_DistraPtyLtdMember |  |
Total current liabilities acquired | 2,261 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities / us-gaap_BusinessAcquisitionAxis = aciw_DistraPtyLtdMember |  |
Deferred income tax | 8,217 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilitiesNoncurrent / us-gaap_BusinessAcquisitionAxis = aciw_DistraPtyLtdMember |  |
Total liabilities acquired | 10,478 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities / us-gaap_BusinessAcquisitionAxis = aciw_DistraPtyLtdMember |  |
Net assets acquired | 49,750 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet / us-gaap_BusinessAcquisitionAxis = aciw_DistraPtyLtdMember |  |
Distra Pty Ltd | Software |  |  |
Business Acquisition [Line Items] |  |  |
Amortizable intangible assets | 18,802 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles / us-gaap_BusinessAcquisitionAxis = aciw_DistraPtyLtdMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_ComputerSoftwareIntangibleAssetMember |  |
Distra Pty Ltd | Software | Minimum |  |  |
Business Acquisition [Line Items] |  |  |
Acquired intangible assets, weighted-average useful lives | 5 years |  |
Distra Pty Ltd | Software | Maximum |  |  |
Business Acquisition [Line Items] |  |  |
Acquired intangible assets, weighted-average useful lives | 10 years |  |
Distra Pty Ltd | Customer relationships |  |  |
Business Acquisition [Line Items] |  |  |
Amortizable intangible assets | 6,200 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles / us-gaap_BusinessAcquisitionAxis = aciw_DistraPtyLtdMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember |  |
Distra Pty Ltd | Customer relationships | Minimum |  |  |
Business Acquisition [Line Items] |  |  |
Acquired intangible assets, weighted-average useful lives | 10 years |  |
Distra Pty Ltd | Customer relationships | Maximum |  |  |
Business Acquisition [Line Items] |  |  |
Acquired intangible assets, weighted-average useful lives | 20 years |  |

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