XML 35 R24.htm IDEA: XBRL DOCUMENT
v3.21.1

Stock-Based Compensation Plans (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Summary of Stock Option Activity | A summary of stock option activity is as follows:
| Number of Shares |  | Weighted Average Exercise Price ($) |  | Weighted Average Remaining Contractual Term (Years) |  | Aggregate Intrinsic Value of In-the-Money Options ($)
Outstanding as of December 31, 2020 | 2,186,511 |  |  | $ | 17.87 |  |  |  |  |
Exercised | (144,285) |  |  | 19.40 |  |  |  |  |
Outstanding as of March 31, 2021 | 2,042,226 |  |  | $ | 17.77 |  |  | 3.93 |  | $ | 41,422,807 |
Exercisable as of March 31, 2021 | 2,042,226 |  |  | $ | 17.77 |  |  | 3.93 |  | $ | 41,422,807 |
Total Shareholder Return Awards (TSRs) |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Summary of Nonvested Performance Award Activity | A summary of nonvested total shareholder return awards ("TSRs") is as follows:
| Number of Shares |  | Weighted Average Grant Date Fair Value
Nonvested as of December 31, 2020 | 1,367,728 |  |  | $ | 34.59 |
Granted | 367,317 |  |  | 50.60 |
Vested | (782,588) |  |  | 31.31 |
Forfeited | (29,405) |  |  | 33.25 |
Change in payout rate | 391,294 |  |  | 31.31 |
Nonvested as of March 31, 2021 | 1,314,346 |  |  | $ | 40.07 |
Total Shareholder Return Awards (TSRs) | Monte Carlo Simulation Model |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Summary of Grant Date Fair Value Weighted-Average Assumptions, Awards Other Than Options | The fair value of TSRs granted during the three months ended March 31, 2021 and 2020, were estimated on the date of grant using the Monte Carlo simulation model, acceptable under ASC 718, using the following weighted average assumptions:
| Three Months Ended March 31,
| 2021 |  | 2020
Expected life (years) | 2.8 |  | 2.8
Risk-free interest rate | 0.3 | % |  | 0.5 | %
Expected volatility | 41.2 | % |  | 31.4 | %
Expected dividend yield | — |  |  | — |
Restricted Share Units (RSUs) |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Summary of Nonvested Restricted Share Unit Activity | A summary of nonvested restricted share unit awards ("RSUs") is as follows:
| Number of Shares |  | Weighted Average Grant Date Fair Value
Nonvested as of December 31, 2020 | 1,118,182 |  |  | $ | 27.34 |
Granted | 480,049 |  |  | 39.36 |
Vested | (406,542) |  |  | 26.73 |
Forfeited | (88,114) |  |  | 26.84 |
Nonvested as of March 31, 2021 | 1,103,575 |  |  | $ | 32.84 |

X
- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of awards other than stock options, including, but not limited to: (a) expected term of share awards and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References No definition available. + Details
Name: | aciw_ScheduleOfShareBasedPaymentAwardOtherThanStockOptionsValuationAssumptionsTableTextBlock
Namespace Prefix: | aciw_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the changes in outstanding nonvested performance-based units. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfNonvestedPerformanceBasedUnitsActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the changes in outstanding nonvested restricted stock units. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfNonvestedRestrictedStockUnitsActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_AwardTypeAxis=aciw_TotalShareholderReturnMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ValuationTechniqueAxis=aciw_MonteCarloSimulationValuationModelMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=us-gaap_RestrictedStockUnitsRSUMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |