Fair value of the assets less the liabilities of a derivative or group of derivatives.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-10

+ Details

Name:	us-gaap_DerivativeFairValueOfDerivativeNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Fixed interest rate related to the interest rate derivative.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeFixedInterestRate
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 20
-Name Accounting Standards Codification
-Section 25
-Paragraph 6A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480682/815-20-25-6A

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480237/815-40-50-5

+ Details

Name:	us-gaap_DerivativeLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Nominal or face amount used to calculate payment on derivative.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 181
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480401/815-10-55-181

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-1B

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1A
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-1A

+ Details

Name:	us-gaap_DerivativeNotionalAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis=us-gaap_CashFlowHedgingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_HedgingDesignationAxis=us-gaap_DesignatedAsHedgingInstrumentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=iart_CrossCurrencyInterestRateContractOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PositionAxis=us-gaap_LongMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PositionAxis=us-gaap_ShortMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=iart_CrossCurrencyInterestRateContractTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=iart_CrossCurrencyInterestRateContractThreeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=us-gaap_CrossCurrencyInterestRateContractMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

DERIVATIVE INSTRUMENTS - Schedule of Cross Currency Swap Derivatives (Details) SFr in Thousands, $ in Thousands	Mar. 31, 2026 USD ($)	Mar. 31, 2026 CHF (SFr)	Dec. 31, 2025 USD ($)	Dec. 31, 2025 CHF (SFr)	Nov. 30, 2025 USD ($)	Nov. 30, 2025 CHF (SFr)	Feb. 28, 2025 USD ($)	Feb. 28, 2025 CHF (SFr)	Dec. 31, 2020 USD ($)	Dec. 31, 2020 CHF (SFr)
Cash Flow Hedges \| Designated as Hedging Instrument
Derivative [Line Items]
Aggregate Notional Amount	$ 900,000		$ 900,000
Fair Value Asset (Liability)	29,126		27,246
Cross Currency Interest Rate Swap One \| Cash Flow Hedges \| Designated as Hedging Instrument
Derivative [Line Items]
Fair Value Asset (Liability)	$ (50,500)		(54,149)
Cross Currency Interest Rate Swap One \| Cash Flow Hedges \| Designated as Hedging Instrument \| Long
Derivative [Line Items]
Fixed Rate	3.25%	3.25%
Aggregate Notional Amount \| SFr		SFr 299,387		SFr 305,137
Cross Currency Interest Rate Swap One \| Cash Flow Hedges \| Designated as Hedging Instrument \| Short
Derivative [Line Items]
Fixed Rate	6.14%	6.14%
Aggregate Notional Amount	$ 336,088		342,543
Cross Currency Interest Rate Swap Two \| Cash Flow Hedges \| Designated as Hedging Instrument
Derivative [Line Items]
Fair Value Asset (Liability)	$ (2,581)		(2,684)
Cross Currency Interest Rate Swap Two \| Cash Flow Hedges \| Designated as Hedging Instrument \| Long
Derivative [Line Items]
Fixed Rate	4.00%	4.00%
Aggregate Notional Amount \| SFr		SFr 56,644		56,644
Cross Currency Interest Rate Swap Two \| Cash Flow Hedges \| Designated as Hedging Instrument \| Short
Derivative [Line Items]
Fixed Rate	7.11%	7.11%
Aggregate Notional Amount	$ 70,000		70,000
Cross Currency Interest Rate Swap Three \| Cash Flow Hedges \| Designated as Hedging Instrument
Derivative [Line Items]
Fair Value Asset (Liability)	$ (1,969)		(2,834)
Cross Currency Interest Rate Swap Three \| Cash Flow Hedges \| Designated as Hedging Instrument \| Long
Derivative [Line Items]
Fixed Rate	3.00%	3.00%
Aggregate Notional Amount \| SFr		SFr 80,920		SFr 80,920
Cross Currency Interest Rate Swap Three \| Cash Flow Hedges \| Designated as Hedging Instrument \| Short
Derivative [Line Items]
Fixed Rate	6.23%	6.23%
Aggregate Notional Amount	$ 100,000		100,000
Cross-currency swap
Derivative [Line Items]
Aggregate Notional Amount					$ 170,000	SFr 137,600	$ 368,400	SFr 328,100	$ 471,600	SFr 420,100
Cross-currency swap \| Cash Flow Hedges \| Designated as Hedging Instrument
Derivative [Line Items]
Fair Value Asset (Liability)	$ (55,050)		$ (59,667)