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Regulatory Matters (Details 3) (GSWC, USD $) In Thousands, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012
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GSWC |  |
Regulatory matters: |  |
Under (over) collection | $ 122,681 | $ 176,015

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- Details
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Namespace Prefix: | awr_
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- Definition The net amount of all regulatory assets less all regulatory liabilities as of the end of the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 340 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6499975&loc=d3e44250-110382 + Details
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Period Type: | instant