BASIS OF PRESENTATION - Additional Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended		12 Months Ended		1 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014	Sep. 30, 2014	Sep. 30, 2010	Mar. 31, 2015
Property, Plant and Equipment [Line Items]
Impairment of Project Horizon	$ 2,502	$ 0	$ 2,502	$ 0	$ 5,000	$ 58,100
Proceeds from asset sales			1,558	36
Asset under Construction [Member]
Property, Plant and Equipment [Line Items]
Proceeds from asset sales							$ 1,300