CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parenthetical) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2010
Cancellation of old common shares in exchange for new common shares, shares	16,127

Number of common shares cancelled for new common shares in connection with emergence from bankruptcy.

No definition available.

Name:	gsig_CancellationOfOldCommonSharesForNewCommonSharesShares
Namespace Prefix:	gsig_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration