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Network
187 - Disclosure - Income Taxes - Reconciliation of Beginning and Ending Amount of Unrecognized Tax benefits (Detail)
(http://www.aciworldwide.com/taxonomy/role/DisclosureIncomeTaxesReconciliationOfBeginningAndEndingAmountOfUnrecognizedTaxBenefits)
Table(Implied)
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0000935036 (http://www.sec.gov/CIK)
Income Tax Disclosure [Abstract]Period [Axis]
2016-01-01 - 2016-12-31
2015-01-01 - 2015-12-31
2014-01-01 - 2014-12-31
Income Tax Disclosure [Abstract]
 
 
 
Balance of unrecognized tax benefits at beginning of year
21,079,000  
14,780,000  
14,996,000  
Increases for tax positions of prior years
58,000  
1,449,000  
84,000  
Decreases for tax positions of prior years
(361,000) 
(47,000) 
(412,000) 
Increases for tax positions established for the current period
5,185,000  
9,866,000  
491,000  
Decreases for settlements with taxing authorities
(167,000) 
(594,000) 
 
Reductions resulting from lapse of applicable statute of limitation
(1,310,000) 
(4,218,000) 
(239,000) 
Adjustment resulting from foreign currency translation
(206,000) 
(157,000) 
(140,000) 
Balance of unrecognized tax benefits at end of year
24,278,000  
 
21,079,000  
 
14,780,000