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Intangibles - Narrative (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
Dec. 31, 2013
Sep. 30, 2013
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]          
Amortization of Intangible Assets     $ 20,358us-gaap_AmortizationOfIntangibleAssets $ 10,567us-gaap_AmortizationOfIntangibleAssets $ 10,747us-gaap_AmortizationOfIntangibleAssets
Impairment of intangible assets 1,356us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill 167us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill   1,523us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill 773us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill
Institutional Products Group          
Finite-Lived Intangible Assets [Line Items]          
Impairment of finite-lived intangible assets     13,041us-gaap_ImpairmentOfIntangibleAssetsFinitelived
/ us-gaap_StatementBusinessSegmentsAxis
= ivc_InstitutionalProductsGroupMember
1,356us-gaap_ImpairmentOfIntangibleAssetsFinitelived
/ us-gaap_StatementBusinessSegmentsAxis
= ivc_InstitutionalProductsGroupMember
677us-gaap_ImpairmentOfIntangibleAssetsFinitelived
/ us-gaap_StatementBusinessSegmentsAxis
= ivc_InstitutionalProductsGroupMember
Institutional Products Group | Customer lists          
Finite-Lived Intangible Assets [Line Items]          
Impairment of finite-lived intangible assets     12,826us-gaap_ImpairmentOfIntangibleAssetsFinitelived
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerListsMember
/ us-gaap_StatementBusinessSegmentsAxis
= ivc_InstitutionalProductsGroupMember
442us-gaap_ImpairmentOfIntangibleAssetsFinitelived
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerListsMember
/ us-gaap_StatementBusinessSegmentsAxis
= ivc_InstitutionalProductsGroupMember
 
Institutional Products Group | Noncompete Agreements          
Finite-Lived Intangible Assets [Line Items]          
Impairment of finite-lived intangible assets     215us-gaap_ImpairmentOfIntangibleAssetsFinitelived
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_NoncompeteAgreementsMember
/ us-gaap_StatementBusinessSegmentsAxis
= ivc_InstitutionalProductsGroupMember
   
Institutional Products Group | Trademarks with definite life          
Finite-Lived Intangible Assets [Line Items]          
Impairment of finite-lived intangible assets       123us-gaap_ImpairmentOfIntangibleAssetsFinitelived
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= ivc_TrademarksFiniteLivedIntangibleAssetsMember
/ us-gaap_StatementBusinessSegmentsAxis
= ivc_InstitutionalProductsGroupMember
 
Institutional Products Group | Developed technology          
Finite-Lived Intangible Assets [Line Items]          
Impairment of finite-lived intangible assets       223us-gaap_ImpairmentOfIntangibleAssetsFinitelived
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_DevelopedTechnologyRightsMember
/ us-gaap_StatementBusinessSegmentsAxis
= ivc_InstitutionalProductsGroupMember
398us-gaap_ImpairmentOfIntangibleAssetsFinitelived
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_DevelopedTechnologyRightsMember
/ us-gaap_StatementBusinessSegmentsAxis
= ivc_InstitutionalProductsGroupMember
North America/HME | Customer lists          
Finite-Lived Intangible Assets [Line Items]          
Impairment of finite-lived intangible assets       167us-gaap_ImpairmentOfIntangibleAssetsFinitelived
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerListsMember
/ us-gaap_StatementBusinessSegmentsAxis
= ivc_NorthAmericaHomeMedicalEquipmentMember
 
North America/HME | Patents          
Finite-Lived Intangible Assets [Line Items]          
Impairment of finite-lived intangible assets         96us-gaap_ImpairmentOfIntangibleAssetsFinitelived
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_PatentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= ivc_NorthAmericaHomeMedicalEquipmentMember
Trademarks | Institutional Products Group          
Finite-Lived Intangible Assets [Line Items]          
Impairment of indefinite-lived intangible assets       568us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TrademarksMember
/ us-gaap_StatementBusinessSegmentsAxis
= ivc_InstitutionalProductsGroupMember
279us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TrademarksMember
/ us-gaap_StatementBusinessSegmentsAxis
= ivc_InstitutionalProductsGroupMember
Impairment indefinite-lived intangible assets, net of tax       $ 496ivc_IndefiniteLivedIntangibleAssetsImpairmentLossesAfterTax
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TrademarksMember
/ us-gaap_StatementBusinessSegmentsAxis
= ivc_InstitutionalProductsGroupMember
$ 204ivc_IndefiniteLivedIntangibleAssetsImpairmentLossesAfterTax
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TrademarksMember
/ us-gaap_StatementBusinessSegmentsAxis
= ivc_InstitutionalProductsGroupMember
Minimum          
Finite-Lived Intangible Assets [Line Items]          
Useful life of intangible assets     1 year    
Maximum          
Finite-Lived Intangible Assets [Line Items]          
Useful life of intangible assets     10 years    
Weighted Average          
Finite-Lived Intangible Assets [Line Items]          
Useful life of intangible assets     6 years