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Document And Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2020
Feb. 26, 2021
Jun. 30, 2020
Document Information Line Items      
Entity Registrant Name INTER PARFUMS INC    
Trading Symbol IPAR    
Document Type 10-K    
Current Fiscal Year End Date --12-31    
Entity Common Stock, Shares Outstanding   31,635,098  
Entity Public Float     $ 847,418,717.70
Amendment Flag false    
Entity Central Index Key 0000822663    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Filer Category Large Accelerated Filer    
Entity Well-known Seasoned Issuer Yes    
Document Period End Date Dec. 31, 2020    
Document Fiscal Year Focus 2020    
Document Fiscal Period Focus FY    
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Shell Company false    
Document Annual Report true    
Document Transition Report false    
Entity File Number 0-16469    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 13-3275609    
Entity Address, Address Line One 551 Fifth Avenue    
Entity Address, City or Town New York    
Entity Address, State or Province NY    
Entity Address, Postal Zip Code 10176    
City Area Code 212    
Local Phone Number 983.2640    
Title of 12(b) Security Common Stock, $.001 par value per share    
Security Exchange Name NASDAQ    
Entity Interactive Data Current Yes