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Other Revenue (Details) $ in Millions	3 Months Ended
Other Revenue (Details) $ in Millions	Mar. 31, 2017 USD ($)
Other Revenue [Abstract]
NEB Revenue	$ 11.2

X

- Definition

NEB Revenue

+ References

No definition available.

+ Details

Name:	icui_NEBRevenue
Namespace Prefix:	icui_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Other Revenue [Abstract]

+ References

No definition available.

+ Details

Name:	icui_OtherRevenueAbstract
Namespace Prefix:	icui_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration