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NET LOSS PER COMMON SHARE (Details) (USD $) In Thousands, except Share data, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012
NET LOSS PER COMMON SHARE |  |  |  |
Nonvested shares outstanding | 1,229,646 |  | 1,229,646 |
Anti-dilutive shares |  |  | 1,229,646 |
Common shares outstanding, basic: |  |  |  |
Weighted average common shares outstanding - Basic | 43,196,895 | 42,878,228 | 43,179,300 | 40,484,409
Common shares outstanding, diluted: |  |  |  |
Weighted average common shares outstanding - Basic | 43,196,895 | 42,878,228 | 43,179,300 | 40,484,409
Weighted average common shares outstanding, diluted | 43,196,895 | 42,878,228 | 43,179,300 | 40,484,409
Reconciliation of the net loss attributable to GS&T and the net loss attributable to GS&T for diluted net loss per share |  |  |  |
Net loss attributable to GS&T | $ (45,369) | $ (27,741) | $ (93,532) | $ (60,840)
Net loss attributable to GS&T for the computation of diluted net loss per share | $ (45,369) | $ (27,741) | $ (93,532) | $ (60,840)

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