General - Additional Information (Details)	1 Months Ended	9 Months Ended
Jun. 30, 2016	Dec. 31, 2015
Regulatory Liabilities [Line Items]
Water reduction target goal (percent)	20.00%	30.00%

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration