Consolidated Businesses - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	Aug. 09, 2013 Bolt	Jun. 30, 2014 MSDSonline Subsequent Event
Subsidiary Or Equity Method Investee [Line Items]
Cash paid for acquisition	$ 8.7	$ 10.0

Amount of business acquisition purchase price including redeemable noncontrolling interest.

No definition available.

Name:	icge_BusinessAcquisitionPurchasePrice
Namespace Prefix:	icge_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant