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Reinsurance (Narrative) (Details)	3 Months Ended
Reinsurance (Narrative) (Details)	Mar. 31, 2018 USD ($)
Reinsurance [Abstract]
Individual risk	$ 500,000

X

- Definition

Reinsurance Maximum Individual Risk

+ References

No definition available.

+ Details

Name:	icch_ReinsuranceMaximumIndividualRisk
Namespace Prefix:	icch_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- References

No definition available.

+ Details

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