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

X
- Definition Number of common shares cancelled for new common shares in connection with emergence from bankruptcy. + References No definition available. + Details
Name: | gsig_CancellationOfOldCommonSharesForNewCommonSharesShares
Namespace Prefix: | gsig_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration