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Summary of Significant Accounting Policies: (Details) (USD $)	0 Months Ended	3 Months Ended				3 Months Ended									3 Months Ended
	May 20, 2013	Mar. 31, 2014 registrant	Mar. 31, 2013	May 31, 2013 AWR Promissory Note	Mar. 31, 2014 AWR Syndicated Credit Facility	Mar. 31, 2014 GSWC	Mar. 31, 2013 GSWC	Mar. 31, 2014 GSWC Purchase, production, distribution and sale of water customer	Mar. 31, 2014 GSWC Electricity distribution customer	Mar. 31, 2014 ASUS	Mar. 31, 2013 ASUS	Mar. 31, 2014 ASUS Contracts	Mar. 31, 2014 Fourth Amendment to Revolving Credit Agreement AWR Syndicated Credit Facility	May 23, 2013 Fourth Amendment to Revolving Credit Agreement AWR Syndicated Credit Facility	Mar. 31, 2014 Sales GSWC Electricity distribution
Nature of Operations:
Number of customers served								257,000	24,000
Percentage of total revenue															90.00%
Period of fixed price contracts to operate and maintain the water and/or wastewater systems at various military bases												50 years
Basis of Presentation:
Number of registrants filing combined report		2
Stock split, conversion ratio	2
Related Party Transactions
Debt instrument, face amount				$ 20,000,000.0
Debt instrument, maximum borrowing capacity				20,000,000.0
Maximum borrowing capacity on line of credit					100,000,000									100,000,000.0
Notes Payable to Banks:
Maximum borrowing capacity on line of credit					100,000,000									100,000,000.0
Maximum borrowing capacity on line of credit, potential election to increase														50,000,000.0
Line of credit, amount outstanding													24,000,000
Sales and Use Taxes:
Franchise fees billed to customers and recorded as operating revenue						845,000	811,000
Period of fixed price contracts to operate and maintain the water and/or wastewater systems at various military bases												50 years
Non-income tax assessments accounted on a gross basis		$ 4,325,000	$ 4,148,000			$ 3,896,000	$ 3,716,000			$ 149,000	$ 162,000

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