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ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details 2) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended		9 Months Ended
	Jul. 09, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014	Jul. 09, 2014	Sep. 30, 2015
Reclassifications Out of AOCI
Other (expense) income		$ (38,043)	$ (3,566)			$ (47,059)
Impairment of investment		(32,536)	0			(32,536)
Interest expense		(4,876)	(3,592)			(13,887)
Net loss attributable to GS&T		(66,625)	$ (18,290)	$ (182,294)		(145,397)
Net Unrealized Gain (Loss) on Investments \| Reclassification out of Accumulated Other Comprehensive Income
Reclassifications Out of AOCI
Other (expense) income		(687)				(687)
Impairment of investment		(32,536)				(32,536)
Net loss attributable to GS&T		$ (33,223)				$ (33,223)
Predecessor
Reclassifications Out of AOCI
Other (expense) income	$ (1,528)				$ (41,122)
Impairment of investment	0				0
Interest expense	(1,529)				(41,061)
Net loss attributable to GS&T	(851,521)				(951,149)
Predecessor \| Net Unrealized Gain (Loss) on Cash Flow Hedges \| Reclassification out of Accumulated Other Comprehensive Income
Reclassifications Out of AOCI
Net loss attributable to GS&T	(95)				(2,580)
Predecessor \| Net Unrealized Gain (Loss) on Cash Flow Hedges \| Interest rate contracts \| Reclassification out of Accumulated Other Comprehensive Income
Reclassifications Out of AOCI
Interest expense	$ (95)				$ (2,580)