Changes in Stock Appreciation Rights (Parenthetical) (Detail) (SARs)	3 Months Ended	6 Months Ended
Jun. 30, 2013	Jun. 30, 2013
SARs
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock issued upon exercise of SARs	6,999	44,232

Stock Issued During Period Shares Stock Awards Exercised

No definition available.

Name:	icge_StockIssuedDuringPeriodSharesStockAwardsExercised
Namespace Prefix:	icge_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration