Treasury Stock (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2012
Equity, Class of Treasury Stock [Line Items]
Treasury stock purchase plan	$ 40.0
Treasury stock purchase plan remaining available	$ 28.1

Remaining dollar amount available on approved common stock purchase plan.

No definition available.

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