Current Liabilities Components of Current Liabilities (Details) (USD $)	3 Months Ended
Mar. 31, 2015	Dec. 31, 2014
Payables and Accruals [Abstract]
Salaries and wages	$ 37,219,000us-gaap_AccruedSalariesCurrent	$ 41,193,000us-gaap_AccruedSalariesCurrent
Taxes other than income taxes, primarily Value Added Taxes	19,241,000	24,812,000
Warranty cost	29,661,000	30,738,000
Supplemental Executive Retirement Program	13,237,000	21,517,000
Freight	6,851,000ivc_AccruedFreightExpenseCurrent	6,202,000ivc_AccruedFreightExpenseCurrent
Professional	6,196,000us-gaap_AccruedProfessionalFeesCurrent	6,723,000us-gaap_AccruedProfessionalFeesCurrent
Product liability, current portion	3,695,000ivc_ProductLiabilityCurrent	4,334,000ivc_ProductLiabilityCurrent
Rebates	1,777,000ivc_AccruedRebatesCurrent	1,722,000ivc_AccruedRebatesCurrent
Insurance	1,252,000us-gaap_AccruedInsuranceCurrent	1,266,000us-gaap_AccruedInsuranceCurrent
Interest	970,000us-gaap_InterestPayableCurrent	1,068,000us-gaap_InterestPayableCurrent
Derivative liabilities	4,808,000us-gaap_DerivativeLiabilitiesCurrent	2,526,000us-gaap_DerivativeLiabilitiesCurrent
Severance	2,824,000	4,209,000
Other items, principally trade accruals	12,925,000us-gaap_OtherAccruedLiabilitiesCurrent	10,165,000us-gaap_OtherAccruedLiabilitiesCurrent
Accrued expenses	140,656,000us-gaap_AccruedLiabilitiesCurrent	156,475,000us-gaap_AccruedLiabilitiesCurrent
Payments for deferred compensation, Cash Based Arrangement	8,280,000
Payments for deferred compensation arrangements	805,000
Deferred Compensation, Cash Based Arrangement, Expected Payment within next twelve months	12,846,000
Payments for deferred compensation arrangements, Expected Payment within next twelve months	$ 2,720,000

Freight Accrual, Current [Line Items]

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Accrued Rebates, Current

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- Definition

Deferred Compensation, Cash Based Arrangement, Expected Payment

+ References

No definition available.

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- Definition

Payments for Deferred Compensation Arrangement

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Payments for Deferred Compensation Arrangement, Expected Payment within Next Twelve Months

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No definition available.

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Payments for Deferred Compensation, Cash Based Arrangement

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No definition available.

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- Definition

Product Liability, Current

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No definition available.

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- Definition

Carrying value as of the balance sheet date of obligations incurred and payable for real and property taxes. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

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- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable to insurance entities to mitigate potential loss from various risks or to satisfy a promise to provide certain coverage's to employees. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

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- Definition

Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

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- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable for professional fees, such as for legal and accounting services received. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

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Carrying value as of the balance sheet date of the obligations incurred through that date and payable for employees' services provided. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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- Definition

Aggregate carrying value as of the balance sheet date of the liabilities for deferred compensation arrangements payable within one year (or the normal operating cycle, if longer). Represents currently earned compensation under cash arrangements (such as a profit-sharing plan, rabbi trust, and employee contract--excluding equity-based arrangements) that is not actually paid until a later date.

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- Definition

Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled within one year or normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.

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- Definition

Carrying value as of the balance sheet date of [accrued] interest payable on all forms of debt, including trade payables, that has been incurred and is unpaid. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

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-Name Regulation S-X (SX)

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- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable arising from transactions not otherwise specified in the taxonomy. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

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Carrying value as of the balance sheet date of obligations incurred through that date and payable for employer-related costs not otherwise specified in the taxonomy. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

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Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers. For classified balance sheets, represents the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

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