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BUSINESS SEGMENT AND OTHER OPERATIONS DATA, NET FINANCIAL EARNINGS LOSS RECONCILIATION (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Segment Reporting [Abstract]
Consolidated NFE									$ 151,503	$ 176,857	$ 113,681
Less:
Unrealized (gain) loss on derivative instruments and related transactions									(38,681)	28,534	(9,418)
Effects of economic hedging related to natural gas inventory									(8,225)	26,639	7,635
Tax adjustments									17,449	(20,286)	655
NET INCOME	$ 4,197	$ (7,460)	$ 60,903	$ 123,320	$ (24,420)	$ (14,274)	$ 172,971	$ 7,693	$ 180,960	$ 141,970	$ 114,809

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- Definition

Effects Of Economic Hedging Related To Natural Gas Inventory, Net Of Taxes, used to reconcile net financial earnings to net income

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Income Tax Expense (Benefit) on Financial Earnings (Loss)

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Net Financial Earnings (Loss) is a non-GAAP measure of earnings that eliminates certain timing differences surrounding the recognition of certain gains or losses associated with derivative activity

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Net Financial Earnings (Loss), Reconciling Items [Abstract]

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of open derivatives, commodity, or energy contracts, held at each balance sheet date, that was included in earnings for the period.

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