Debt Instrument, Fee Amount, Net Balance Shown as a Liability

No definition available.

Name:	ivc_DebtInstrumentFeeAmountNetBalanceShownasaLiability
Namespace Prefix:	ivc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Debt Instrument, Loss on Exchange

+ References

No definition available.

+ Details

Name:	ivc_DebtInstrumentLossonExchange
Namespace Prefix:	ivc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Debt Instrument, Net Carrying Amount

+ References

No definition available.

+ Details

Name:	ivc_DebtInstrumentNetCarryingAmount
Namespace Prefix:	ivc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
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+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Increase for accrued, but unpaid interest on the debt instrument for the period.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(f))
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+ Details

Name:	us-gaap_DebtInstrumentIncreaseAccruedInterest
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

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

- Definition

Amount of long-term debt and lease obligation, including portion classified as current.

+ References

No definition available.

+ Details

Name:	us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The cash inflow from issuance of rights to purchase common shares at predetermined price (usually issued together with corporate debt).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
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-Paragraph 14
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+ Details

Name:	us-gaap_ProceedsFromIssuanceOfWarrants
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=ivc_ConvertibleSeniorNotesat4.50February2022Domain
Namespace Prefix:
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Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Long-Term Debt Components of Convertible Debt (Details) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2019	Jun. 30, 2017	Dec. 31, 2021
Debt Instrument [Line Items]
Long-term debt	$ 311,869,000				$ 308,129,000
Convertible Subordinated Debt \| Convertible Senior Notes at 4.50% February 2022 [Domain]
Debt Instrument [Line Items]
Debt Instrument, Increase, Accrued Interest	30,000	$ 769,000
Debt Instrument, Face Amount	$ 2,650,000			$ 120,000,000	2,650,000
Issuance of warrants				$ 14,100,000
Interest rate (as a percent)	4.50%
Long-term debt	$ 2,647,000				2,642,000
Debt fees	(3,000)				(8,000)
Debt Instrument, Net Carrying Amount	2,647,000				2,642,000
Convertible Subordinated Debt \| Convertible Senior Notes at 5.00% November 2024 [Domain]
Debt Instrument [Line Items]
Long-term debt	72,207,000				72,140,000
Convertible Subordinated Debt \| Convertible Senior Notes at 5.00% November 2024
Debt Instrument [Line Items]
Debt Instrument, Increase, Accrued Interest	911,000
Debt Instrument, Loss on Exchange			$ 5,885,000
Debt Instrument, Face Amount	$ 72,909,000				72,909,000
Interest rate (as a percent)	5.00%
Debt fees	$ (702,000)				(769,000)
Debt Instrument, Net Carrying Amount	$ 72,207,000				$ 72,140,000