SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF PARENT (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Assets
Cash and equivalents	$ 23,486	$ 1,315	$ 4,197
Deferred tax assets	8,617	9,540
Income taxes receivable	16,547	20,537
Total current assets	184,033	165,601
Other assets	15,587	12,474
Total Assets	1,280,943	1,238,362	1,192,035
Liabilities and Capitalization
Notes payable to bank		2,000	60,900
Total current liabilities	93,697	107,583
Deferred taxes	142,597	128,963
Total other credits	400,204	381,718
Common shareholders' equity	454,579	408,666	377,541	359,430
Total capitalization	787,042	749,061
Total Capitalization and Liabilities	1,280,943	1,238,362
AWR
Assets
Cash and equivalents	311	981
Inter-company loan receivables	15,013	10,292
Deferred tax assets	633
Income taxes receivable	1,415	1,447
Total current assets	17,372	12,720
Investments in subsidiaries	435,373	395,415
Other assets	2,421	3,010
Total Assets	455,166	411,145
Liabilities and Capitalization
Notes payable to bank		2,000
Deferred taxes and other liabilities	117	166
Total current liabilities	117	2,166
Deferred taxes	49
Income taxes payable and other liabilities	421	313
Total other credits	470	313
Common shareholders' equity	454,579	408,666
Total capitalization	454,579	408,666
Total Capitalization and Liabilities	$ 455,166	$ 411,145