XML 39 R52.htm IDEA: XBRL DOCUMENT

Regulatory Matters (Details 10) (GSWC, Cost of Capital Proceeding for Water Regions)	12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Dec. 31, 2012	Sep. 30, 2012	Jul. 31, 2012
GSWC \| Cost of Capital Proceeding for Water Regions
Regulatory matters:
Authorized return on equity percentage	9.43%				9.99%
Period of cost of capital proceedings considered for adjustment of R O E and rate of return on rate base	3 years
Public Utilities, Requested Return on Equity, Percentage			56.00%
Change in average of the Moody's Aa utility bond rate (as a percent)		0.30%
Decrease in Moody's rate from benchmark (as a percent)				1.12%
Proposed authorized ROE under the settlement agreement (as a percent)					9.43%