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Component: (Network and Table)
Network
2410407 - Disclosure - Income Taxes (Reconciliation Of Unrecognized Tax Benefits) (Details)
(http://www.ansys.com/role/IncomeTaxesReconciliationOfUnrecognizedTaxBenefitsDetails)
Table(Implied)
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0001013462 (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]
 
 
 
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
 
 
 
Unrecognized tax benefit as of January 1
16,067,000  
16,342,000  
19,590,000  
Gross increases-tax positions in prior period
983,000  
64,000  
488,000  
Gross decreases-tax positions in prior period
(2,502,000) 
(850,000) 
(3,715,000) 
Gross increases-tax positions in current period
2,725,000  
4,064,000  
2,513,000  
Reductions due to a lapse of the applicable statute of limitations
(927,000) 
(2,808,000) 
(1,924,000) 
Changes due to currency fluctuation
(348,000) 
(653,000) 
(610,000) 
Settlements
(789,000) 
(92,000) 
0  
Unrecognized tax benefit as of December 31
15,209,000  
 
16,067,000  
 
16,342,000