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Revenue from Contract with Customers - Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Disaggregation of Revenue [Line Items] |  |  |  |
Total operating revenues | $ 128,414 | $ 121,278 | $ 245,474 | $ 230,355
GOLDEN STATE WATER COMPANY |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total operating revenues | 91,633 | 94,753 | 166,662 | 177,145
Water Service Utility Operations | GOLDEN STATE WATER COMPANY |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contract with customer, excluding assessed tax | 88,185 | 78,717 | 163,524 | 149,200
Total operating revenues | 91,633 | 87,074 | 166,662 | 158,498
Electric Service Utility Operations | GOLDEN STATE WATER COMPANY |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contract with customer, excluding assessed tax |  | 7,562 |  | 17,852
Total operating revenues |  | 7,679 |  | 18,647
Electric Service Utility Operations | Bear Valley Electric Service, Inc. |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contract with customer, excluding assessed tax | 8,374 |  |  |
Total operating revenues | 8,108 |  |  |
Electric Service Utility Operations | Golden State Water Company and Bear Valley Electric Service Inc. |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contract with customer, excluding assessed tax |  |  | 20,253 |
Total operating revenues |  |  | 19,647 |
Contracted Services | ASUS |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contract with customer, excluding assessed tax | 28,673 | 26,525 | 59,165 | 53,210
Tariff-based Revenues | Water Service Utility Operations | GOLDEN STATE WATER COMPANY |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contract with customer, excluding assessed tax | 86,687 | 77,264 | 160,975 | 146,518
Tariff-based Revenues | Electric Service Utility Operations | GOLDEN STATE WATER COMPANY |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contract with customer, excluding assessed tax |  | 7,384 |  | 17,416
Tariff-based Revenues | Electric Service Utility Operations | Bear Valley Electric Service, Inc. |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contract with customer, excluding assessed tax | 8,330 |  | 20,007 |
Tariff-based Revenues | Electric Service Utility Operations | Golden State Water Company and Bear Valley Electric Service Inc. |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contract with customer, excluding assessed tax |  |  | 20,007 |
Surcharges (Cost-recovery Activities) | Water Service Utility Operations | GOLDEN STATE WATER COMPANY |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contract with customer, excluding assessed tax | 975 | 962 | 1,509 | 1,696
Surcharges (Cost-recovery Activities) | Electric Service Utility Operations | GOLDEN STATE WATER COMPANY |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contract with customer, excluding assessed tax |  | 178 |  | 436
Surcharges (Cost-recovery Activities) | Electric Service Utility Operations | Bear Valley Electric Service, Inc. |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contract with customer, excluding assessed tax | 44 |  | 246 |
Surcharges (Cost-recovery Activities) | Electric Service Utility Operations | Golden State Water Company and Bear Valley Electric Service Inc. |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contract with customer, excluding assessed tax |  |  | 246 |
Other Products and Services | Water Service Utility Operations | GOLDEN STATE WATER COMPANY |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contract with customer, excluding assessed tax | 523 | 491 | 1,040 | 986
Alternative revenues program [Member] | Water Service Utility Operations | GOLDEN STATE WATER COMPANY |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Alternative revenue program | 3,448 | (8,357) | (3,138) | (9,298)
Alternative revenues program [Member] | Electric Service Utility Operations | GOLDEN STATE WATER COMPANY |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Alternative revenue program |  | (117) | 606 | (795)
Alternative revenues program [Member] | Electric Service Utility Operations | Bear Valley Electric Service, Inc. |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Alternative revenue program | (266) |  |  |
Alternative revenues program [Member] | Electric Service Utility Operations | Golden State Water Company and Bear Valley Electric Service Inc. |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Alternative revenue program |  |  | 606 |
Water | Contracted Services | ASUS |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contract with customer, excluding assessed tax | 18,765 | 13,472 | 37,648 | 28,173
Wastewater | Contracted Services | ASUS |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contract with customer, excluding assessed tax | $ 9,908 | $ 13,053 | $ 21,517 | $ 25,037

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- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 40 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9031-108599 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9038-108599 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130543-203045 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 42 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9054-108599 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130545-203045 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 924 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 11.L) -URI http://asc.fasb.org/extlink&oid=6472922&loc=d3e499488-122856 + Details
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- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 28 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=75031198&loc=d3e14064-108612 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 40 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9031-108599 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9038-108599 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 42 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9054-108599 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(g)(1)(ii)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 235 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-05(b)(2)) -URI http://asc.fasb.org/extlink&oid=120399901&loc=d3e537907-122884 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(1)) -URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227 + Details
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