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Major Customer: (Details) (Hospira [Member])
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Dec. 31, 2014
Sales Revenue, Net [Member]      
Concentration Risk [Line Items]      
Concentration Risk, Percentage 36.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember
/ us-gaap_MajorCustomersAxis
= icui_HospiraMember
35.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember
/ us-gaap_MajorCustomersAxis
= icui_HospiraMember
 
Accounts Receivable [Member]      
Concentration Risk [Line Items]      
Entity Wide Accounts Receivable Major Customer Percent 25.00%icui_EntityWideAccountsReceivableMajorCustomerPercent
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_MajorCustomersAxis
= icui_HospiraMember
  27.00%icui_EntityWideAccountsReceivableMajorCustomerPercent
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_MajorCustomersAxis
= icui_HospiraMember