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ACQUISITION (Tables)
12 Months Ended
Sep. 30, 2017
Business Combinations [Abstract]  
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed
The following table summarizes the purchase price allocation for the fair value of the assets acquired and liabilities assumed as of July 27, 2017:
 (Thousands)
Estimated Fair Value
Total purchase price consideration transferred
$
55,661

Identifiable assets acquired
 
Wholesale energy contracts (1)
$
41,846

Retail energy contracts (2)
13,815

Net assets acquired
$
55,661

(1)
Wholesale energy contracts are presented within Intangible assets, net on the Consolidated Balance Sheets.
(2)
Retail energy contracts are presented within the Derivatives, at fair value line items on the Consolidated Balance Sheets.