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Taxes on Income (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Taxes on income |  |  |
Unrecognized Tax Benefits | $ 0 |  |
Interest Expense | 21,992,000 | $ 21,088,000 | $ 21,617,000
Deferred tax assets: |  |  |
Regulatory-liability-related: ITC and excess deferred taxes | 903,000 | 952,000 |
Regulatory-liability-related: California Corp Franchise Tax | 3,365,000 | 4,530,000 |
Other nonproperty-related | 1,993,000 | 2,486,000 |
Contributions and advances | 7,464,000 | 8,026,000 |
Deferred tax assets | 13,725,000 | 15,994,000 |
Deferred tax liabilities: |  |  |
Fixed assets | (200,378,000) | (178,004,000) |
Regulatory-asset-related: depreciation and other | (24,402,000) | (21,658,000) |
Deferred Tax Liabilities, Regulatory Assets and Liabilities Related to State Franchise Tax | (2,033,000) | (2,440,000) |
Other nonproperty-related | 0 | (66,000) |
Balancing and memorandum accounts | (7,010,000) | (1,824,000) |
Deferred charges | (4,429,000) | (4,849,000) |
Deferred tax liabilities | (238,252,000) | (208,841,000) |
Accumulated deferred income taxes - net | (224,527,000) | (192,847,000) |
Current |  |  |
Federal | 2,297,000 | 21,866,000 | 5,595,000
State | 4,798,000 | 5,442,000 | 137,000
Total current tax expense | 7,095,000 | 27,308,000 | 5,732,000
Deferred |  |  |
Federal | 26,715,000 | 8,948,000 | 24,815,000
State | 925,000 | 1,475,000 | 7,501,000
Total deferred tax expense | 27,640,000 | 10,423,000 | 32,316,000
Reconciliations of the effective tax rates to the federal statutory rate |  |  |
Federal taxes on pretax income at statutory rate | 33,067,000 | 34,375,000 | 34,687,000
Flow-through on removal costs | (78,000) | (1,560,000) | (643,000)
Effective Income Tax Rate Reconciliation, Tax Credit, Investment, Amount | (83,000) | (88,000) | (91,000)
Income tax expense/(benefit) | 34,735,000 | 37,731,000 | 38,048,000
Pretax income from continuing operations | $ 94,478,000 | $ 98,215,000 | $ 99,106,000
Effective income tax rate (as a percent) | 36.80% | 38.40% | 38.40%
Increase (decrease) in taxes resulting from: | $ 3,029,000 | $ 4,843,000 | $ 4,781,000
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Depreciation, Amount | 994,000 | 626,000 | 651,000
Income Tax Reconciliation Flow Through on Pension Costs | (247,000) | 267,000 | (507,000)
Income Tax Reconciliation Cost of Removal | (2,068,000) | (929,000) | (1,571,000)
Income Tax Examination, Penalties Accrued | 0 | 0 | 0
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount | 121,000 | 197,000 | 741,000
Income Tax Examination, Penalties Expense | 0 | 0 | 0
Tax Authorities |  |  |
Taxes on income |  |  |
Net interest receivable | 461,000 | 504,000 | 504,000
Recognized interest income |  | 0 |
Consolidated Entities [Member] | Tax Authorities |  |  |
Taxes on income |  |  |
Recognized interest income | 8,000 |  | 19,000
AWR Parent |  |  |
Reconciliations of the effective tax rates to the federal statutory rate |  |  |
Income tax expense/(benefit) | (546,000) | (810,000) | (996,000)
Pretax income from continuing operations | 59,197,000 | 59,674,000 | 60,062,000
GSWC |  |  |
Taxes on income |  |  |
Interest Expense | 21,782,000 | 20,998,000 | 21,524,000
Deferred tax assets: |  |  |
Regulatory-liability-related: ITC and excess deferred taxes | 903,000 | 952,000 |
Regulatory-liability-related: California Corp Franchise Tax | 3,365,000 | 4,530,000 |
Other nonproperty-related | 1,901,000 | 1,997,000 |
Contributions and advances | 7,712,000 | 8,026,000 |
Deferred tax assets | 13,881,000 | 15,505,000 |
Deferred tax liabilities: |  |  |
Fixed assets | (203,133,000) | (179,660,000) |
Regulatory-asset-related: depreciation and other | (24,402,000) | (21,658,000) |
Deferred Tax Liabilities, Regulatory Assets and Liabilities Related to State Franchise Tax | (2,208,000) | (3,051,000) |
Other nonproperty-related | (68,000) | (65,000) |
Balancing and memorandum accounts | (7,271,000) | (1,824,000) |
Deferred charges | (4,597,000) | (4,905,000) |
Deferred tax liabilities | (241,679,000) | (211,163,000) |
Accumulated deferred income taxes - net | (227,798,000) | (195,658,000) |
Current |  |  |
Federal | (3,115,000) | 16,196,000 | 408,000
State | 3,625,000 | 5,557,000 | (2,754,000)
Total current tax expense | 510,000 | 21,753,000 | (2,346,000)
Deferred |  |  |
Federal | 25,864,000 | 8,536,000 | 24,373,000
State | 2,235,000 | 2,183,000 | 9,979,000
Total deferred tax expense | 28,099,000 | 10,719,000 | 34,352,000
Reconciliations of the effective tax rates to the federal statutory rate |  |  |
Federal taxes on pretax income at statutory rate | 26,452,000 | 28,022,000 | 27,952,000
Flow-through on removal costs | 0 | (1,268,000) | (55,000)
Effective Income Tax Rate Reconciliation, Tax Credit, Investment, Amount | (82,000) | (88,000) | (91,000)
Income tax expense/(benefit) | 28,609,000 | 32,472,000 | 32,006,000
Pretax income from continuing operations | $ 75,578,000 | $ 80,063,000 | $ 79,863,000
Effective income tax rate (as a percent) | 37.90% | 40.60% | 40.10%
Increase (decrease) in taxes resulting from: | $ 3,118,000 | $ 5,151,000 | $ 4,693,000
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Depreciation, Amount | 994,000 | 626,000 | 651,000
Income Tax Reconciliation Flow Through on Pension Costs | (247,000) | 267,000 | (507,000)
Income Tax Reconciliation Cost of Removal | (2,068,000) | (929,000) | (1,571,000)
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount | 442,000 | 691,000 | 934,000
GSWC | Tax Authorities |  |  |
Taxes on income |  |  |
Net interest receivable | 499,000 | 512,000 | 472,000
Interest Expense |  | $ 3,000 |
Recognized interest income | $ 7,000 |  | 14,000
Tax Year 2013 [Member] |  |  |
Taxes on income |  |  |
Deferred Tax Liabilities Related to Repair-And-Maintenance Deductions |  |  | $ 30,800,000

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