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Long-Term Obligations Principal Payment (Details) | 9 Months Ended
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Sep. 30, 2024 USD ($) | Sep. 30, 2023 USD ($)
Debt Disclosure [Abstract] |  |
Term A principal payment % First 2 Years | 0.0250 |
Term A Principal Payment % Year 3 and 4 | 0.0500 |
Term A Principal Payment % in Year 5 | 0.0750 |
Term Loan B Principal Payment % | 0.0025 |
Debt Instrument, Periodic Payment, Principal | $ 38,300,000 | $ 22,300,000

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- Definition Term A principal payment % First 2 Years + References No definition available. + Details
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- Definition Term A Principal Payment % in Year 5 + References No definition available. + Details
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Namespace Prefix: | icui_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

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- Definition Term A Principal Payment % Year 3 and 4 + References No definition available. + Details
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Namespace Prefix: | icui_
Data Type: | xbrli:pureItemType
Balance Type: | na
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- Definition Term Loan B Principal Payment % + References No definition available. + Details
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Namespace Prefix: | icui_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
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- Definition Amount of the required periodic payments applied to principal. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | debit
Period Type: | duration