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Subsequent Events Term Loan B Applicable Margin (Details) - Subsequent Event | Jan. 06, 2022
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Subsequent Event [Line Items] |
Term Loan B Initial Spread | 2.50%
Pricing Level II [Member] [Member] |
Subsequent Event [Line Items] |
Term Loan B Euro Rate Loan Spread | 2.50%
Term Loan B Base Rate Loan Spread | 1.50%
Pricing Level I [Member] |
Subsequent Event [Line Items] |
Term Loan B Euro Rate Loan Spread | 2.25%
Term Loan B Base Rate Loan Spread | 1.25%

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- Definition Term Loan B Base Rate Loan Spread + References No definition available. + Details
Name: | icui_TermLoanBBaseRateLoanSpread
Namespace Prefix: | icui_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Term Loan B Euro Rate Loan Spread + References No definition available. + Details
Name: | icui_TermLoanBEuroRateLoanSpread
Namespace Prefix: | icui_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Term Loan B Initial Spread + References No definition available. + Details
Name: | icui_TermLoanBInitialSpread
Namespace Prefix: | icui_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

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- 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_TermLoanBApplicableMarginAxis=icui_PricingLevelIIMemberMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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