Document And Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2019	Feb. 12, 2020	Jun. 30, 2019
Document Information Line Items
Entity Registrant Name	Inter Parfums, Inc
Document Type	10-K
Current Fiscal Year End Date	--12-31
Entity Common Stock, Shares Outstanding		31,531,418
Entity Public Float			$ 1,165,784,928
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, 2019
Document Fiscal Year Focus	2019
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
Entity Interactive Data Current	Yes