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Subsequent Events Term Loan A & Credit Line Applicable Margin (Details) - Subsequent Event | Jan. 06, 2022
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Subsequent Event [Line Items] |
Term Loan A and Credit Line Spread | 1.75%
Pricing Level 5 |
Subsequent Event [Line Items] |
spread | 2.25%
Debt Instrument, Basis Spread on Variable Rate | 1.25%
Line of Credit Facility, Commitment Fee Percentage | 0.35%
Pricing Level IV [Member] [Member] |
Subsequent Event [Line Items] |
spread | 2.00%
Debt Instrument, Basis Spread on Variable Rate | 1.00%
Line of Credit Facility, Commitment Fee Percentage | 0.30%
Pricing Level III [Member] [Member] |
Subsequent Event [Line Items] |
spread | 1.75%
Debt Instrument, Basis Spread on Variable Rate | 0.75%
Line of Credit Facility, Commitment Fee Percentage | 0.25%
Pricing Level II [Member] [Member] |
Subsequent Event [Line Items] |
spread | 1.50%
Debt Instrument, Basis Spread on Variable Rate | 0.50%
Line of Credit Facility, Commitment Fee Percentage | 0.20%
Pricing Level I [Member] |
Subsequent Event [Line Items] |
spread | 1.25%
Debt Instrument, Basis Spread on Variable Rate | 0.25%
Line of Credit Facility, Commitment Fee Percentage | 0.15%

X
- Definition spread + References No definition available. + Details
Name: | icui_Spread
Namespace Prefix: | icui_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Term Loan A and Credit Line Spread + References No definition available. + Details
Name: | icui_TermLoanAAndCreditLineSpread
Namespace Prefix: | icui_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used. + References No definition available. + Details
Name: | us-gaap_LineOfCreditFacilityCommitmentFeePercentage
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | icui_TermLoanAAndCreditLineApplicableMarginSpreadAxis=icui_PricingLevel5Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | icui_TermLoanAAndCreditLineApplicableMarginSpreadAxis=icui_PricingLevelIVMemberMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | icui_TermLoanAAndCreditLineApplicableMarginSpreadAxis=icui_PricingLevelIIIMemberMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | icui_TermLoanAAndCreditLineApplicableMarginSpreadAxis=icui_PricingLevelIIMemberMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | icui_TermLoanAAndCreditLineApplicableMarginSpreadAxis=icui_PricingLevelIMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |