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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-URI https://asc.fasb.org/extlink&oid=123594938&loc=d3e13433-108611

+ 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

No definition available.

+ 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/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5580258-113959

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5579245-113959

+ Details

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

- Details

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

- Details

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

DERIVATIVE INSTRUMENTS - Schedule of Net Investment Hedges Derivatives (Details) € in Thousands, SFr in Thousands	Jun. 30, 2022 USD ($)	Jun. 30, 2022 CHF (SFr)	Jun. 30, 2022 EUR (€)	May 26, 2022 USD ($)	May 26, 2022 CHF (SFr)	Dec. 31, 2021 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2021 EUR (€)	Jun. 30, 2021 USD ($)	Dec. 21, 2020 USD ($)	Dec. 21, 2020 CHF (SFr)
Cross-currency swap
Derivative [Line Items]
Aggregate Notional Amount	$ 6,400,000								$ 7,300,000	$ 471,600,000	SFr 420,100
Net Investment Hedges \| Cross-currency swap
Derivative [Line Items]
Aggregate Notional Amount							$ 52,000,000	€ 44,900
Designated as Hedging Instrument \| Net Investment Hedges \| Cross-currency swap
Derivative [Line Items]
Aggregate Notional Amount				$ 300,000,000	SFr 288,200
Fair Value Asset (Liability)	8,700,000					$ 3,858,000
Designated as Hedging Instrument \| Net Investment Hedges \| Cross Currency Interest Rate Swap One
Derivative [Line Items]
Fair Value Asset (Liability)	$ 5,740,000					2,503,000
Designated as Hedging Instrument \| Net Investment Hedges \| Cross Currency Interest Rate Swap One \| Long
Derivative [Line Items]
Fixed Rate	0.00%	0.00%	0.00%
Aggregate Notional Amount \| €			€ 51,760
Designated as Hedging Instrument \| Net Investment Hedges \| Cross Currency Interest Rate Swap One \| Short
Derivative [Line Items]
Fixed Rate	2.57%	2.57%	2.57%
Aggregate Notional Amount	$ 60,000,000
Designated as Hedging Instrument \| Net Investment Hedges \| Cross Currency Interest Rate Swap Two
Derivative [Line Items]
Fair Value Asset (Liability)	$ 4,784,000					2,147,000
Designated as Hedging Instrument \| Net Investment Hedges \| Cross Currency Interest Rate Swap Two \| Long
Derivative [Line Items]
Fixed Rate	0.00%	0.00%	0.00%
Aggregate Notional Amount \| €			€ 38,820
Designated as Hedging Instrument \| Net Investment Hedges \| Cross Currency Interest Rate Swap Two \| Short
Derivative [Line Items]
Fixed Rate	2.19%	2.19%	2.19%
Aggregate Notional Amount	$ 45,000,000
Designated as Hedging Instrument \| Net Investment Hedges \| Cross Currency Interest Rate Swap Three
Derivative [Line Items]
Fair Value Asset (Liability)	$ 0					(792,000)
Designated as Hedging Instrument \| Net Investment Hedges \| Cross Currency Interest Rate Swap Three \| Long
Derivative [Line Items]
Fixed Rate	0.00%	0.00%	0.00%
Aggregate Notional Amount \| SFr		SFr 222,300
Designated as Hedging Instrument \| Net Investment Hedges \| Cross Currency Interest Rate Swap Three \| Short
Derivative [Line Items]
Fixed Rate	1.10%	1.10%	1.10%
Aggregate Notional Amount	$ 250,000,000
Designated as Hedging Instrument \| Net Investment Hedges \| Cross Currency Interest Rate Contract Four
Derivative [Line Items]
Fair Value Asset (Liability)	$ (1,824,000)					$ 0
Designated as Hedging Instrument \| Net Investment Hedges \| Cross Currency Interest Rate Contract Four \| Long
Derivative [Line Items]
Fixed Rate	0.00%	0.00%	0.00%
Aggregate Notional Amount \| SFr		SFr 288,210
Designated as Hedging Instrument \| Net Investment Hedges \| Cross Currency Interest Rate Contract Four \| Short
Derivative [Line Items]
Fixed Rate	1.94%	1.94%	1.94%
Aggregate Notional Amount	$ 300,000,000