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Revenue Contract Liabilities Text (Details) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 USD ($)
Contract asset and liability balances [Line Items] |
Deferred Revenue, Revenue Recognized | $ 29,800

X
- Definition [Line Items] for Contract asset and liability balances [Table] + References No definition available. + Details
Name: | icui_ContractassetandliabilitybalancesLineItems
Namespace Prefix: | icui_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of revenue recognized that was previously reported as deferred or unearned revenue. + References No definition available. + Details
Name: | us-gaap_DeferredRevenueRevenueRecognized1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration