| Fiscal period | 2018 | 2017 | 2016 | 2015 | 2014 | 2013 | 2012 | 2011 | 2010 | 2009 |
|---|
| Period End Date | 12/31/2018 | 12/31/2017 | 12/31/2016 | 12/31/2015 | 12/31/2014 | 12/31/2013 | 12/31/2012 | 12/31/2011 | 12/31/2010 | 12/31/2009 |
|---|
| Utility revenues | 1,369.57 | 1,423.39 | 1,418.91 | 1,456.09 | 1,433.34 | 1,402.20 | 1,352.39 | 1,441.52 | 1,417.85 | 1,395.20 |
| Non-utility energy marketing and trading revenues | -- | -- | -- | -- | 39.22 | -- | -- | -- | -- | 117.36 |
| Operating Revenues:Ecova revenues | -- | -- | -- | -- | -- | -- | -- | 137.85 | 102.04 | -- |
| Other non-utility revenues | 27.33 | 22.54 | 23.57 | 28.69 | -- | 39.55 | 38.95 | 40.41 | 38.86 | -- |
| Total revenues | 1,396.89 | 1,445.93 | 1,442.48 | 1,484.78 | 1,472.56 | 1,441.74 | 1,391.34 | 1,619.78 | 1,558.74 | 1,512.57 |
| Operations and maintenance | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Utility operating expenses: Resource costs | 494.74 | 524.57 | 551.37 | 656.96 | 678.24 | 689.59 | 693.13 | 790.05 | 795.08 | 799.54 |
| Non-utility operating expenses: Resource costs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Utility operating expenses: Depreciation and amortization | 182.88 | 171.28 | 160.51 | 143.50 | 129.57 | 117.17 | 112.09 | 105.63 | 100.55 | 93.78 |
| Non-utility operating expenses: Depreciation and amortization | 0.80 | 0.74 | 0.77 | 0.70 | 0.61 | 0.58 | 0.79 | 0.78 | 1.00 | 5.99 |
| Depreciation and amortization-Ecova | -- | -- | -- | -- | -- | -- | -- | 7.19 | 6.07 | -- |
| Administrative and general | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Utility operating expenses: Taxes other than income taxes | 107.30 | 106.75 | 98.74 | 97.66 | 94.30 | 88.44 | 83.41 | 83.35 | 73.38 | 76.58 |
| Restructuring and exit costs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Acquisition costs | 3.72 | 14.62 | -- | -- | -- | -- | -- | -- | -- | -- |
| Utility operating expenses: Other operating expenses | (318.27) | (310.14) | (305.74) | (303.22) | (286.83) | (276.23) | (276.78) | (261.93) | (252.44) | (229.91) |
| Non-utility operating expenses: Other operating expenses | (28.08) | (25.65) | (25.50) | (29.53) | (30.42) | (38.65) | (38.04) | (33.12) | (30.39) | (106.10) |
| Gain on sale of utility properties | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Other operating expenses-Ecova | -- | -- | -- | -- | -- | -- | -- | (109.74) | (80.10) | -- |
| Total Operating Expenses | 1,135.78 | 1,153.75 | 1,142.62 | 1,231.56 | 1,219.97 | 1,210.66 | 1,204.24 | 1,391.78 | 1,339.01 | -- |
| Income from operations | 261.11 | 292.18 | 299.86 | 253.21 | 252.59 | 231.09 | 187.10 | 228.00 | 219.73 | -- |
| Interest expense | 99.72 | 95.36 | 86.50 | 79.97 | 75.30 | 77.12 | 75.10 | 73.88 | 75.79 | 65.08 |
| Capitalized interest | (3.94) | (3.31) | (2.65) | (3.55) | (3.92) | (3.68) | (2.40) | (2.94) | (0.30) | (0.55) |
| Interest expense to affiliated trusts | 1.22 | 0.83 | 0.63 | 0.47 | 0.45 | 0.47 | 0.54 | 0.33 | 0.64 | 1.96 |
| Other income - net | (1.46) | (0.61) | 0.02 | 9.30 | 11.35 | 5.17 | 2.71 | 3.43 | 2.50 | 0.80 |
| Regulatory disallowance of unamortized debt repurchase costs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Pre-Tax Income | 162.66 | 198.69 | 215.40 | 185.62 | 192.11 | 162.35 | 116.57 | 160.17 | 146.11 | 134.97 |
| Provision for Income taxes | 26.06 | 82.76 | 78.09 | 67.45 | 72.24 | 58.01 | 39.76 | 56.63 | 51.16 | 46.32 |
| Federal income taxes at statutory rates | 34.16 | 69.54 | 75.39 | 64.97 | 67.24 | 56.82 | 40.80 | 56.06 | 51.14 | -- |
| Tax effect of regulatory treatment of utility plant differences | (8.15) | 3.48 | 3.30 | 4.36 | 4.01 | 3.53 | 2.43 | 1.80 | 2.76 | -- |
| State income tax expense | 1.19 | 1.11 | 1.32 | 1.01 | 0.51 | 1.55 | 0.86 | 0.69 | 0.62 | -- |
| Preferred dividends | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Settlement of prior year tax returns and adjustment of tax reserves | (0.14) | (0.38) | 0.01 | (0.99) | 1.10 | (1.10) | (2.20) | 0.16 | (1.03) | -- |
| Manufacturing deduction | -- | (1.12) | -- | (1.20) | (0.17) | (2.03) | (1.10) | (1.10) | (1.63) | -- |
| Kettle Falls tax credit | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Other-net | (0.34) | (1.09) | (0.33) | (0.70) | (0.45) | (0.76) | (1.03) | (0.98) | (0.71) | -- |
| Avista Utilities | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Energy Marketing and Resource Management | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Avista Advantage | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Information and Technology | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Settlement of equity awards | (0.99) | (1.44) | (1.60) | -- | -- | -- | -- | -- | -- | -- |
| Acquisition costs | 0.33 | 2.49 | -- | -- | -- | -- | -- | -- | -- | -- |
| Federal income tax rate change | -- | 10.17 | -- | -- | -- | -- | -- | -- | -- | -- |
| Income from continuing operations | 136.60 | 115.93 | 137.32 | 118.17 | 119.87 | 104.33 | 76.80 | 103.54 | 94.95 | 88.65 |
| Less: Income from discontinued operations attributable to noncontrolling interest | -- | -- | -- | 5.15 | 72.41 | 7.96 | -- | -- | -- | -- |
| Asset impairment charges | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Minority interest | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Income tax benefit | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Loss from operations | -- | -- | -- | -- | -- | -- | 2.00 | -- | -- | -- |
| Loss before asset impairment charges, minority interest and income taxes | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Cumulative effect of accounting change | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Consolidated Net Income (Loss) | -- | -- | -- | 123.32 | 192.28 | 112.29 | 78.80 | -- | -- | -- |
| Net income attributable to noncontrolling interests | 0.17 | 0.02 | 0.09 | 0.09 | 0.24 | 1.22 | 0.59 | 3.32 | 2.52 | 1.58 |
| Preferred Stock Dividend & Other Adjustments | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Net Income (Loss) available to limited partners shareholders | 136.43 | 115.92 | 137.23 | 123.23 | 192.04 | 111.08 | 78.21 | 100.22 | 92.43 | 87.07 |
| Earnings Per Share (Basic) - Cont Ops | -- | -- | -- | 1.90 | 1.94 | 1.74 | 1.30 | -- | -- | -- |
| Earnings Per Share (Basic) - Disc Ops | -- | -- | -- | 0.08 | 1.18 | 0.11 | 0.02 | -- | -- | -- |
| Earnings Per Share (Basic) - Acc Change | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| NET EARNINGS PER SHARE (BASIC) | 2.08 | 1.80 | 2.16 | 1.98 | 3.12 | 1.85 | 1.32 | 1.73 | 1.66 | 1.59 |
| Earnings Per Share (Diluted) - Cont Ops | -- | -- | -- | 1.89 | 1.93 | 1.74 | 1.30 | -- | -- | -- |
| Earnings Per Share (Diluted) - Disc Ops | -- | -- | -- | 0.08 | 1.17 | 0.11 | 0.02 | -- | -- | -- |
| Earnings Per Share (Diluted) - Acc Change | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| NET EARNINGS PER SHARE (DILUTED) | 2.07 | 1.79 | 2.15 | 1.97 | 3.10 | 1.85 | 1.32 | 1.72 | 1.65 | 1.58 |
| Weighted Average Shares Outstanding (Basic) | 65.67 | 64.50 | 63.51 | 62.30 | 61.63 | 59.96 | 59.03 | 57.87 | 55.60 | 54.69 |
| Weighted Average Shares Outstanding (Diluted) | 65.95 | 64.81 | 63.92 | 62.71 | 61.89 | 60.00 | 59.20 | 58.09 | 55.82 | 54.94 |