DOCUMENT AND ENTITY INFORMATION - shares	9 Months Ended
	Sep. 30, 2020	Oct. 27, 2020
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2020
Document Transition Report	false
Entity File Number	0-26224
Entity Registrant Name	INTEGRA LIFESCIENCES HOLDINGS CORP
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	51-0317849
Entity Address	1100 Campus Road
Entity City	Princeton
Entity State	NJ
Entity Postal Zip Code	08540
City Area Code	609
Local Phone Number	275-0500
Title of 12(b) Security	Common Stock, Par Value $.01 Per Share
Trading Symbol	IART
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Smaller Reporting Company	false
Emerging Growth Company	false
Entity Shell Company	false
Entity Bankruptcy Proceedings, Reporting Current	false
Entity Common Stock, Shares Outstanding (in shares)		84,272,671
Amendment Flag	false
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q3
Entity Central Index Key	0000917520
Current Fiscal Year End Date	--12-31