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Electric utility subsidiary - Consolidating statement of income (unaudited) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2015 | Jun. 30, 2014
Operating expenses |  |  |  |
Purchased power | $ 149,000 | $ 188,000 | $ 285,000 | $ 353,000
Total expenses | 551,182 | 715,474 | 1,119,538 | 1,410,009
Operating income | 72,730 | 83,183 | 142,236 | 172,397
Other income (loss) |  |  |  |
Allowance for equity funds used during construction | 1,896 | 1,387 | 3,309 | 2,996
Interest and other charges |  |  |  |
Allowance for borrowed funds used during construction | 682 | 523 | 1,181 | 1,137
Income taxes | 20,911 | 23,317 | 40,890 | 49,038
Net income | 35,491 | 41,754 | 67,830 | 88,014
Preferred stock dividends of subsidiaries | 473 | 473 | 946 | 946
Net income for common stock | 35,018 | 41,281 | 66,884 | 87,068
Hawaiian Electric Company |  |  |  |
Condensed Income Statements, Captions [Line Items] |  |  |  |
Revenues | 391,007 | 530,991 | 790,748 | 1,043,446
Operating expenses |  |  |  |
Fuel oil | 104,278 | 195,549 | 222,681 | 399,096
Purchased power | 107,370 | 140,805 | 210,620 | 264,774
Other operation and maintenance | 66,428 | 68,992 | 136,512 | 127,507
Depreciation | 29,389 | 27,300 | 58,778 | 54,601
Taxes, other than income taxes | 37,479 | 49,949 | 75,680 | 98,133
Total expenses | 344,944 | 482,595 | 704,271 | 944,111
Operating income | 46,063 | 48,396 | 86,477 | 99,335
Other income (loss) |  |  |  |
Allowance for equity funds used during construction | 1,581 | 1,417 | 2,704 | 2,889
Equity in earnings of subsidiaries | 9,624 | 9,859 | 17,316 | 18,776
Interest and other charges |  |  |  |
Interest expense and other charges, net | (11,290) | (11,553) | (22,528) | (22,040)
Allowance for borrowed funds used during construction | 564 | 535 | 952 | 1,094
Income before income taxes | 46,542 | 48,654 | 84,921 | 100,054
Income taxes | 13,431 | 14,154 | 24,666 | 29,864
Net income | 33,111 | 34,500 | 60,255 | 70,190
Net income attributable to Hawaiian Electric | 33,111 | 34,500 | 60,255 | 70,190
Preferred stock dividends of Hawaiian Electric | 270 | 270 | 540 | 540
Net income for common stock | 32,841 | 34,230 | 59,715 | 69,650
HELCO |  |  |  |
Condensed Income Statements, Captions [Line Items] |  |  |  |
Revenues | 83,732 | 103,544 | 171,787 | 208,475
Operating expenses |  |  |  |
Fuel oil | 16,241 | 31,179 | 39,626 | 62,679
Purchased power | 24,555 | 28,170 | 46,448 | 57,661
Other operation and maintenance | 16,158 | 14,817 | 32,557 | 28,864
Depreciation | 9,312 | 8,976 | 18,625 | 17,951
Taxes, other than income taxes | 7,944 | 9,757 | 16,328 | 19,520
Total expenses | 74,210 | 92,899 | 153,584 | 186,675
Operating income | 9,522 | 10,645 | 18,203 | 21,800
Other income (loss) |  |  |  |
Allowance for equity funds used during construction | 165 | 121 | 310 | 186
Interest and other charges |  |  |  |
Interest expense and other charges, net | (2,592) | (2,852) | (5,272) | (5,600)
Allowance for borrowed funds used during construction | 58 | 47 | 111 | 72
Income before income taxes | 7,153 | 7,961 | 13,352 | 16,458
Income taxes | 2,536 | 2,982 | 4,813 | 6,184
Net income | 4,617 | 4,979 | 8,539 | 10,274
Preferred stock dividends of subsidiaries | 133 | 133 | 267 | 267
Net income attributable to Hawaiian Electric | 4,484 | 4,846 | 8,272 | 10,007
Net income for common stock | 4,484 | 4,846 | 8,272 | 10,007
Maui Electric |  |  |  |
Condensed Income Statements, Captions [Line Items] |  |  |  |
Revenues | 83,442 | 103,916 | 169,116 | 206,609
Operating expenses |  |  |  |
Fuel oil | 25,712 | 43,529 | 60,730 | 94,782
Purchased power | 17,359 | 19,348 | 28,223 | 30,804
Other operation and maintenance | 16,278 | 14,755 | 33,797 | 30,799
Depreciation | 5,540 | 5,317 | 11,081 | 10,644
Taxes, other than income taxes | 7,959 | 9,918 | 16,122 | 19,942
Total expenses | 72,848 | 92,867 | 149,953 | 186,971
Operating income | 10,594 | 11,049 | 19,163 | 19,638
Other income (loss) |  |  |  |
Allowance for equity funds used during construction | 150 | (151) | 295 | (79)
Interest and other charges |  |  |  |
Interest expense and other charges, net | (2,424) | (2,469) | (4,859) | (4,974)
Allowance for borrowed funds used during construction | 60 | (59) | 118 | (29)
Income before income taxes | 8,380 | 8,370 | 14,717 | 14,556
Income taxes | 3,144 | 3,261 | 5,482 | 5,596
Net income | 5,236 | 5,109 | 9,235 | 8,960
Preferred stock dividends of subsidiaries | 96 | 96 | 191 | 191
Net income attributable to Hawaiian Electric | 5,140 | 5,013 | 9,044 | 8,769
Net income for common stock | 5,140 | 5,013 | 9,044 | 8,769
Other subsidiaries |  |  |  |
Condensed Income Statements, Captions [Line Items] |  |  |  |
Revenues | 0 | 0 | 0 | 0
Operating expenses |  |  |  |
Other operation and maintenance | 0 | 0 | 0 | 0
Total expenses | 0 | 0 | 0 | 0
Operating income | 0 | 0 | 0 | 0
Interest and other charges |  |  |  |
Income before income taxes | 0 | 0 | 0 | 0
Income taxes | 0 | 0 | 0 | 0
Net income | 0 | 0 | 0 | 0
Net income attributable to Hawaiian Electric | 0 | 0 | 0 | 0
Net income for common stock | 0 | 0 | 0 | 0
Consolidating adjustments |  |  |  |
Condensed Income Statements, Captions [Line Items] |  |  |  |
Revenues | (18) | (22) | (46) | (39)
Operating expenses |  |  |  |
Operating income | (18) | (22) | (46) | (39)
Other income (loss) |  |  |  |
Equity in earnings of subsidiaries | (9,624) | (9,859) | (17,316) | (18,776)
Interest and other charges |  |  |  |
Interest expense and other charges, net | 18 | 22 | 46 | 39
Income before income taxes | (9,624) | (9,859) | (17,316) | (18,776)
Income taxes | 0 | 0 | 0 | 0
Net income | (9,624) | (9,859) | (17,316) | (18,776)
Net income attributable to Hawaiian Electric | (9,624) | (9,859) | (17,316) | (18,776)
Net income for common stock | (9,624) | (9,859) | (17,316) | (18,776)
HECO Consolidated |  |  |  |
Condensed Income Statements, Captions [Line Items] |  |  |  |
Revenues | 558,163 | 738,429 | 1,131,605 | 1,458,491
Operating expenses |  |  |  |
Fuel oil | 146,231 | 270,257 | 323,037 | 556,557
Purchased power | 149,284 | 188,323 | 285,291 | 353,239
Other operation and maintenance | 98,864 | 98,564 | 202,866 | 187,170
Depreciation | 44,241 | 41,593 | 88,484 | 83,196
Taxes, other than income taxes | 53,382 | 69,624 | 108,130 | 137,595
Total expenses | 492,002 | 668,361 | 1,007,808 | 1,317,757
Operating income | 66,161 | 70,068 | 123,797 | 140,734
Other income (loss) |  |  |  |
Allowance for equity funds used during construction | 1,896 | 1,387 | 3,309 | 2,996
Interest and other charges |  |  |  |
Interest expense and other charges, net | (16,288) | (16,852) | (32,613) | (32,575)
Allowance for borrowed funds used during construction | 682 | 523 | 1,181 | 1,137
Income before income taxes | 52,451 | 55,126 | 95,674 | 112,292
Income taxes | 19,111 | 20,397 | 34,961 | 41,644
Net income | 33,340 | 34,729 | 60,713 | 70,648
Preferred stock dividends of subsidiaries | 229 | 229 | 458 | 458
Net income attributable to Hawaiian Electric | 33,111 | 34,500 | 60,255 | 70,190
Preferred stock dividends of Hawaiian Electric | 270 | 270 | 540 | 540
Net income for common stock | $ 32,841 | $ 34,230 | $ 59,715 | $ 69,650

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