v3.26.3
STOCK-BASED COMPENSATION - Schedule of Compensation Expense, Fair Value, and Intrinsic Value Related to Option Activity (Details) - Options - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Share-based Compensation Arrangement by Share-based Payment Award    
Compensation expense, Total $ 6,872 $ 6,669
Compensation expense, net of tax 5,776 5,455
Grant date fair value of options vested 7,502 5,200
Income Statement Location [Axis]: us-gaap:CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization    
Share-based Compensation Arrangement by Share-based Payment Award    
Compensation expense, Total 567 587
Income Statement Location [Axis]: atr:SellingResearchAndDevelopmentAndAdministrativeExpenses    
Share-based Compensation Arrangement by Share-based Payment Award    
Compensation expense, Total $ 6,305 $ 6,082