REGULATION - REGULATORY FILINGS (Details)	6 Months Ended
Mar. 31, 2015
BGSS [Member]
Schedule of Regulatory [Line Items]
Public Utilities, interim rate increase (decrease), percentage	(5.00%)
CIP [Member]
Schedule of Regulatory [Line Items]
Public Utilities, interim rate increase (decrease), percentage	(4.30%)

Percentage of public utility's interim rate increase (decrease) allowed while waiting final decision of regulatory agency.

No definition available.

Name:	us-gaap_PublicUtilitiesInterimRateIncreaseDecreasePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration