Business Segments: (Details 2) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Details of reportable segment
Total utility plant	$ 1,015,507	$ 988,668	$ 1,015,507	$ 988,668	$ 1,003,520
Other assets	327,848	338,424	327,848	338,424
Total Assets	1,343,355	1,327,092	1,343,355	1,327,092	1,378,298
GOLDEN STATE WATER COMPANY
Details of reportable segment
Public Utilities Property Plant and Equipment Depreciation on Transportation Equipment	151	$ 225	374	$ 497
Total utility plant	1,011,108		1,011,108		998,880
Total Assets	$ 1,282,372		$ 1,282,372		$ 1,282,374