Line of Credit, Covenant Compliance, Consecutive Business Days for Undrawn Balance

No definition available.

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- Definition

Line of Credit, Covenant Compliance, Interruption of Manufacturing Facilities Period

+ References

No definition available.

+ Details

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- Definition

Line of Credit, Covenant Compliance, Maximum Borrowing Capacity, Additional Long-Lived Asset Amount

+ References

No definition available.

+ Details

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Period Type:	instant

- Definition

Line of Credit, Covenant Compliance, Maximum Borrowing Capacity, Availability Reserve, Minimum

+ References

No definition available.

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

Line of Credit, Covenant Compliance, Maximum Borrowing Capacity, Inventories, Domestic, Percent

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

Line of Credit, Covenant Compliance, Maximum Borrowing Capacity, Inventories, Foreign, Liquidation Value, Percent

+ References

No definition available.

+ Details

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- Definition

Line of Credit, Covenant Compliance, Maximum Borrowing Capacity, Inventories, Foreign, Percent

+ References

No definition available.

+ Details

Name:	ivc_LineofCreditCovenantComplianceMaximumBorrowingCapacityInventoriesForeignPercent
Namespace Prefix:	ivc_
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Balance Type:	na
Period Type:	duration

- Definition

Line of Credit, Covenant Compliance, Maximum Borrowing Capacity, Inventories, Liquidation Value, Amount

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Line of Credit, Covenant Compliance, Maximum Borrowing Capacity, Inventories, Liquidation Value, Percent

+ References

No definition available.

+ Details

Name:	ivc_LineofCreditCovenantComplianceMaximumBorrowingCapacityInventoriesLiquidationValuePercent
Namespace Prefix:	ivc_
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Balance Type:	na
Period Type:	duration

- Definition

Line of Credit, Covenant Compliance, Maximum Borrowing Capacity, Property, Plant and Equipment, Liquidation Value, Percent

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Line of Credit, Covenant Compliance, Maximum Borrowing Capacity, Trade Receivables, Domestic, Percent

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Line of Credit, Covenant Compliance, Maximum Borrowing Capacity, Trade Receivables, Foreign, Percent

+ References

No definition available.

+ Details

Name:	ivc_LineofCreditCovenantComplianceMaximumBorrowingCapacityTradeReceivablesForeignPercent
Namespace Prefix:	ivc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Line of Credit, Covenant Compliance, Required Undrawn Balance, Amount

+ References

No definition available.

+ Details

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

- Definition

Line of Credit, Covenant Compliance, Required Undrawn Balance, Minimum, Percent

+ References

No definition available.

+ Details

Name:	ivc_LineofCreditCovenantComplianceRequiredUndrawnBalanceMinimumPercent
Namespace Prefix:	ivc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Line of Credit Facility, Additional Borrowing Capacity

+ References

No definition available.

+ Details

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

- Definition

Line of Credit Facility, Covenant Feature, Increase Limit

+ References

No definition available.

+ Details

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

- Definition

Line of Credit Facility, Maximum Borrowing Capacity, Initial Sublimit

+ References

No definition available.

+ Details

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

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 55

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400

+ Details

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

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of debt issuance costs (for example, but not limited to, legal, accounting, broker, and regulatory fees).

+ References

No definition available.

+ Details

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

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

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

- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Weighted average interest rate of long-term debt outstanding.

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Write-off of amounts previously capitalized as debt issuance cost in an extinguishment of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.8)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

+ Details

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Balance Type:	debit
Period Type:	duration

- Details

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- Details

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- Details

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Long-Term Debt Narrative (Details) (USD $)	3 Months Ended		0 Months Ended
Long-Term Debt Narrative (Details) (USD $)	Mar. 31, 2015	Mar. 31, 2014	Jan. 16, 2015	Feb. 17, 2007	Dec. 31, 2014
Convertible Subordinated Debt \| Convertible Senior Subordinated Debentures at 4.125% February 2027
Debt Instrument [Line Items]
Write off of capitalized fees	$ 668,000	$ 1,070,000
Principal Amount				135,000,000
Interest rate (as a percent)	4.125%
Revolving Credit Facility [Member] \| Line of Credit [Member]
Debt Instrument [Line Items]
Remaining borrowing capacity	38,500,000
Debt issuance costs	1,391,000
Weighted average interest rate (as a percent)	3.16%				2.25%
Revolving Credit Facility [Member] \| Line of Credit [Member] \| Revolving Credit and Security Agreement (New Credit Agreement) [Member]
Debt Instrument [Line Items]
Borrowing capacity			100,000,000
Additional increase in borrowing capacity available			25,000,000
Percentage of domestic accounts receivable			85.00%
Percentage of eligible domestic inventory and in-transit inventory			70.00%
Percentage of net orderly liquidation value of domestic inventory			85.00%
Maximum value of net orderly liquidation value domestic inventory and in-transit inventory			4,000,000
Net orderly liquidation value of domestic eligible machinery and equipment			85.00%
Additional amount of machinery and equipment			2,924,000
Percentage of eligible Canadian accounts receivable			85.00%
Percentage of eligible Canadian inventory			70.00%
Percentage of net orderly liquidation value of eligible Canadian inventory			85.00%
Minimum availability reserve			10,000,000
Minimum required undrawn balance (as a percent)			11.25%
Consecutive business days for minimum undrawn balance			5 days
Required undrawn balance, minimum			10,000,000
Interruption of material manufacturing facilities, period			10 days
Letter of Credit [Member] \| Line of Credit [Member] \| Revolving Credit and Security Agreement (New Credit Agreement) [Member]
Debt Instrument [Line Items]
Borrowing capacity			25,000,000
Initial sublimit			$ 10,000,000
London Interbank Offered Rate (LIBOR) [Member] \| Revolving Credit Facility [Member] \| Line of Credit [Member] \| Revolving Credit and Security Agreement (New Credit Agreement) [Member]
Debt Instrument [Line Items]
Basis spread on variable rate			2.75%
Base Rate [Member] \| Revolving Credit Facility [Member] \| Line of Credit [Member] \| Revolving Credit and Security Agreement (New Credit Agreement) [Member]
Debt Instrument [Line Items]
Basis spread on variable rate			1.75%
Base Rate [Member] \| Revolving Credit Facility [Member] \| Line of Credit [Member] \| Credit Agreement [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	0.25%
Minimum \| Revolving Credit Facility [Member] \| Line of Credit [Member] \| Revolving Credit and Security Agreement (New Credit Agreement) [Member]
Debt Instrument [Line Items]
Commitment fee percentage			0.25%
Minimum \| London Interbank Offered Rate (LIBOR) [Member] \| Revolving Credit Facility [Member] \| Line of Credit [Member] \| Revolving Credit and Security Agreement (New Credit Agreement) [Member]
Debt Instrument [Line Items]
Basis spread on variable rate			2.25%
Minimum \| Base Rate [Member] \| Revolving Credit Facility [Member] \| Line of Credit [Member] \| Revolving Credit and Security Agreement (New Credit Agreement) [Member]
Debt Instrument [Line Items]
Basis spread on variable rate			1.25%
Maximum \| Revolving Credit Facility [Member] \| Line of Credit [Member] \| Revolving Credit and Security Agreement (New Credit Agreement) [Member]
Debt Instrument [Line Items]
Commitment fee percentage			0.375%
Maximum \| London Interbank Offered Rate (LIBOR) [Member] \| Revolving Credit Facility [Member] \| Line of Credit [Member] \| Revolving Credit and Security Agreement (New Credit Agreement) [Member]
Debt Instrument [Line Items]
Basis spread on variable rate			2.75%
Maximum \| Base Rate [Member] \| Revolving Credit Facility [Member] \| Line of Credit [Member] \| Revolving Credit and Security Agreement (New Credit Agreement) [Member]
Debt Instrument [Line Items]
Basis spread on variable rate			1.75%