Treasury Stock (Details) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Equity, Class of Treasury Stock [Line Items]
Treasury stock purchase plan	$ 40.0icui_TreasuryStockPurchasePlan
Treasury stock purchase plan remaining available	22.5
Shares Paid for Tax Withholding for Share Based Compensation	4,232	43,188
Payments Related to Tax Withholding for Share-based Compensation	0.2	3.0
Shares withheld for option exercise in lieu of cash payment	4,583	96,927
Value of option exercises with shares remitted to the company in lieu of cash payment	$ 0.3

Shares withheld for option exercise in lieu of cash payment

No definition available.

Name:	icui_Shareswithheldforoptionexerciseinlieuofcashpayment
Namespace Prefix:	icui_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Treasury stock purchase plan

+ References

No definition available.

+ Details

Name:	icui_TreasuryStockPurchasePlan
Namespace Prefix:	icui_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Remaining dollar amount available on approved common stock purchase plan.

+ References

No definition available.

+ Details

Name:	icui_TreasuryStockPurchasePlanRemainingAvailable
Namespace Prefix:	icui_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Value of option exercises with shares remitted to the company in lieu of cash payment

+ References

No definition available.

+ Details

Name:	icui_Valueofoptionexerciseswithsharesremittedtothecompanyinlieuofcashpayment
Namespace Prefix:	icui_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_EquityClassOfTreasuryStockLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of cash outflow to satisfy an employee's income tax withholding obligation as part of a net-share settlement of a share-based award.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 15

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585

+ Details

Name:	us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

For net-share settlement of share-based awards when the employer settles employees' income tax withholding obligations, this element represents the number of shares the employees use to repay the employer.

+ References

No definition available.

+ Details

Name:	us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration