Annual report pursuant to Section 13 and 15(d)

Intangible Assets - Summary of Carrying Amount and Accumulated Amortization of Identifiable Intangible Assets (Detail)

v2.4.1.9
Intangible Assets - Summary of Carrying Amount and Accumulated Amortization of Identifiable Intangible Assets (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Indefinite Lived And Finite Lived Intangible Assets [Line Items]    
Total nonamortizable and amortizable intangible assets, Gross Assets $ 42,012us-gaap_IntangibleAssetsGrossExcludingGoodwill $ 38,620us-gaap_IntangibleAssetsGrossExcludingGoodwill
Total nonamortizable and amortizable intangible assets, Accumulated Amortization 16,940infu_IntangibleAssetsAccumulatedAmortization 14,438infu_IntangibleAssetsAccumulatedAmortization
Total nonamortizable and amortizable intangible assets, Net 25,073us-gaap_IntangibleAssetsNetExcludingGoodwill 24,182us-gaap_IntangibleAssetsNetExcludingGoodwill
Physician and Customer Relationships [Member]    
Indefinite Lived And Finite Lived Intangible Assets [Line Items]    
Amortizable intangible assets, Gross Assets 32,865us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= infu_PhysicianAndCustomerRelationshipsMember
32,865us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= infu_PhysicianAndCustomerRelationshipsMember
Amortizable intangible assets, Accumulated Amortization 14,755us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= infu_PhysicianAndCustomerRelationshipsMember
12,564us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= infu_PhysicianAndCustomerRelationshipsMember
Amortizable intangible assets, Net 18,111us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= infu_PhysicianAndCustomerRelationshipsMember
20,301us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= infu_PhysicianAndCustomerRelationshipsMember
Non-Compete Agreements [Member]    
Indefinite Lived And Finite Lived Intangible Assets [Line Items]    
Amortizable intangible assets, Gross Assets 848us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_NoncompeteAgreementsMember
848us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_NoncompeteAgreementsMember
Amortizable intangible assets, Accumulated Amortization 778us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_NoncompeteAgreementsMember
621us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_NoncompeteAgreementsMember
Amortizable intangible assets, Net 70us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_NoncompeteAgreementsMember
227us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_NoncompeteAgreementsMember
Software [Member]    
Indefinite Lived And Finite Lived Intangible Assets [Line Items]    
Amortizable intangible assets, Gross Assets 6,299us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_ComputerSoftwareIntangibleAssetMember
2,907us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_ComputerSoftwareIntangibleAssetMember
Amortizable intangible assets, Accumulated Amortization 1,407us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_ComputerSoftwareIntangibleAssetMember
1,253us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_ComputerSoftwareIntangibleAssetMember
Amortizable intangible assets, Net 4,892us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_ComputerSoftwareIntangibleAssetMember
1,654us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_ComputerSoftwareIntangibleAssetMember
Trade Names [Member]    
Indefinite Lived And Finite Lived Intangible Assets [Line Items]    
Nonamortizable intangible assets $ 2,000us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember
$ 2,000us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember