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SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF REGISTRANT - STATEMENTS OF INCOME AND CHANGES IN SHAREHOLDERS' EQUITY (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Expenses: |  |  |  |  |  |  |  |  |  |  |
Depreciation of property, plant and equipment |  |  |  |  |  |  |  |  | $ 200,658 | $ 194,273 | $ 183,966
Total expenses |  |  |  |  |  |  |  |  | 2,217,334 | 2,032,479 | 2,280,429
Merger termination fee |  |  |  |  |  |  |  |  | 0 | 90,000 | 0
Interest expense, net |  |  |  |  |  |  |  |  | 91,128 | 88,558 | 88,476
Income before income taxes |  |  |  |  |  |  |  |  | 276,580 | 373,841 | 254,788
Income (taxes) benefits |  |  |  |  |  |  |  |  | (109,393) | (123,695) | (93,021)
Net income (loss) | $ 32,843 | $ 60,544 | $ 39,134 | $ 34,666 | $ 45,107 | $ 127,613 | $ 44,601 | $ 32,825 | 167,187 | 250,146 | 161,767
Hawaiian Electric Industries, Inc. |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 798 | 647 | 327
Equity in net income of subsidiaries |  |  |  |  |  |  |  |  | 187,097 | 199,485 | 190,033
Expenses: |  |  |  |  |  |  |  |  |  |  |
Operating, administrative and general |  |  |  |  |  |  |  |  | 17,697 | 18,701 | 34,350
Depreciation of property, plant and equipment |  |  |  |  |  |  |  |  | 548 | 566 | 576
Taxes, other than income taxes |  |  |  |  |  |  |  |  | 496 | 4,726 | 440
Total expenses |  |  |  |  |  |  |  |  | 18,741 | 23,993 | 35,366
Income before merger termination fee, interest expense and income (taxes) benefits |  |  |  |  |  |  |  |  | 169,154 | 176,139 | 154,994
Merger termination fee |  |  |  |  |  |  |  |  | 0 | 90,000 | 0
Income before interest expense and income (taxes) benefits |  |  |  |  |  |  |  |  | 169,154 | 266,139 | 154,994
Interest expense, net |  |  |  |  |  |  |  |  | 9,389 | 9,037 | 10,788
Income before income taxes |  |  |  |  |  |  |  |  | 159,765 | 257,102 | 144,206
Income (taxes) benefits |  |  |  |  |  |  |  |  | 5,532 | (8,846) | 15,671
Net income (loss) |  |  |  |  |  |  |  |  | $ 165,297 | $ 248,256 | $ 159,877

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