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Electric utility subsidiary - Consolidating financial statements (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013
Operating expenses |  |  |  |
Purchased power | $ 193,000 | $ 195,000 | $ 546,000 | $ 527,000
Total expenses | 775,994 | 741,130 | 2,187,819 | 2,168,897
Operating income | 91,102 | 88,038 | 261,683 | 237,070
Other income (loss) |  |  |  |
Allowance for equity funds used during construction | 1,937 | 1,255 | 4,933 | 4,030
Interest and other charges |  |  |  |
Allowance for borrowed funds used during construction | 740 | 498 | 1,877 | 1,626
Income taxes | 26,323 | 22,041 | 73,265 | 62,590
Net income | 48,286 | 48,707 | 136,580 | 123,920
Preferred stock dividends of subsidiaries | 471 | 471 | 1,417 | 1,417
Net income for common stock | 47,815 | 48,236 | 135,163 | 122,503
Hawaiian Electric Company |  |  |  |
Revenues | 579,777 | 547,434 | 1,623,223 | 1,576,068
Operating expenses |  |  |  |
Fuel oil | 229,068 | 206,478 | 628,164 | 631,824
Purchased power | 142,121 | 143,280 | 406,895 | 389,706
Other operation and maintenance | 71,584 | 71,498 | 199,091 | 212,474
Depreciation | 27,302 | 25,442 | 81,903 | 75,150
Taxes, other than income taxes | 54,412 | 51,781 | 152,545 | 149,282
Total expenses | 524,487 | 498,479 | 1,468,598 | 1,458,436
Operating income | 55,290 | 48,955 | 154,625 | 117,632
Other income (loss) |  |  |  |
Allowance for equity funds used during construction | 1,668 | 914 | 4,557 | 3,144
Equity in earnings of subsidiaries | 9,800 | 10,794 | 28,576 | 30,446
Interest expense and other charges, net | (11,196) | (9,883) | (33,236) | (28,723)
Interest and other charges |  |  |  |
Allowance for borrowed funds used during construction | 634 | 358 | 1,728 | 1,268
Income before income taxes | 56,196 | 51,138 | 156,250 | 123,767
Income taxes | 17,047 | 13,051 | 46,911 | 32,018
Net income | 39,149 | 38,087 | 109,339 | 91,749
Net income attributable to Hawaiian Electric | 39,149 | 38,087 | 109,339 | 91,749
Preferred stock dividends of Hawaiian Electric | 270 | 270 | 810 | 810
Net income for common stock | 38,879 | 37,817 | 108,529 | 90,939
HELCO |  |  |  |
Revenues | 111,154 | 107,957 | 319,629 | 320,330
Operating expenses |  |  |  |
Fuel oil | 29,555 | 27,615 | 92,234 | 94,120
Purchased power | 34,166 | 34,480 | 91,827 | 93,880
Other operation and maintenance | 19,837 | 16,793 | 48,701 | 46,158
Depreciation | 8,975 | 8,547 | 26,926 | 25,641
Taxes, other than income taxes | 10,607 | 10,457 | 30,127 | 30,113
Total expenses | 103,140 | 97,892 | 289,815 | 289,912
Operating income | 8,014 | 10,065 | 29,814 | 30,418
Other income (loss) |  |  |  |
Allowance for equity funds used during construction | 142 | 222 | 328 | 552
Interest expense and other charges, net | (2,811) | (2,920) | (8,411) | (8,566)
Interest and other charges |  |  |  |
Allowance for borrowed funds used during construction | 54 | 91 | 126 | 226
Income before income taxes | 5,399 | 7,458 | 21,857 | 22,630
Income taxes | 1,965 | 1,881 | 8,149 | 7,486
Net income | 3,434 | 5,577 | 13,708 | 15,144
Preferred stock dividends of subsidiaries | 133 | 133 | 400 | 400
Net income attributable to Hawaiian Electric | 3,301 | 5,444 | 13,308 | 14,744
Net income for common stock | 3,301 | 5,444 | 13,308 | 14,744
Maui Electric |  |  |  |
Revenues | 112,656 | 108,699 | 319,265 | 313,725
Operating expenses |  |  |  |
Fuel oil | 50,809 | 49,267 | 145,591 | 151,794
Purchased power | 16,595 | 17,101 | 47,399 | 43,083
Other operation and maintenance | 16,892 | 16,221 | 47,691 | 42,089
Depreciation | 5,317 | 5,006 | 15,961 | 15,074
Taxes, other than income taxes | 10,169 | 10,234 | 30,111 | 29,681
Total expenses | 99,782 | 97,829 | 286,753 | 281,721
Operating income | 12,874 | 10,870 | 32,512 | 32,004
Other income (loss) |  |  |  |
Allowance for equity funds used during construction | 127 | 119 | 48 | 334
Interest expense and other charges, net | (2,429) | (2,266) | (7,403) | (6,774)
Interest and other charges |  |  |  |
Allowance for borrowed funds used during construction | 52 | 49 | 23 | 132
Income before income taxes | 10,624 | 8,772 | 25,180 | 25,696
Income taxes | 4,030 | 3,326 | 9,626 | 9,706
Net income | 6,594 | 5,446 | 15,554 | 15,990
Preferred stock dividends of subsidiaries | 95 | 95 | 286 | 286
Net income attributable to Hawaiian Electric | 6,499 | 5,351 | 15,268 | 15,704
Net income for common stock | 6,499 | 5,351 | 15,268 | 15,704
Other subsidiaries |  |  |  |
Revenues | 0 | 0 | 0 | 0
Operating expenses |  |  |  |
Other operation and maintenance | 0 | 1 | 0 | 2
Total expenses | 0 | 1 | 0 | 2
Operating income | 0 | (1) | 0 | (2)
Interest and other charges |  |  |  |
Income before income taxes | 0 | (1) | 0 | (2)
Income taxes | 0 | 0 | 0 | 0
Net income | 0 | (1) | 0 | (2)
Net income attributable to Hawaiian Electric | 0 | (1) | 0 | (2)
Net income for common stock | 0 | (1) | 0 | (2)
Consolidating adjustments |  |  |  |
Revenues | (22) | (36) | (61) | (103)
Operating expenses |  |  |  |
Operating income | (22) | (36) | (61) | (103)
Other income (loss) |  |  |  |
Equity in earnings of subsidiaries | (9,800) | (10,794) | (28,576) | (30,446)
Interest expense and other charges, net | 22 | 36 | 61 | 103
Interest and other charges |  |  |  |
Income before income taxes | (9,800) | (10,794) | (28,576) | (30,446)
Income taxes | 0 | 0 | 0 | 0
Net income | (9,800) | (10,794) | (28,576) | (30,446)
Net income attributable to Hawaiian Electric | (9,800) | (10,794) | (28,576) | (30,446)
Net income for common stock | (9,800) | (10,794) | (28,576) | (30,446)
HECO Consolidated |  |  |  |
Revenues | 803,565 | 764,054 | 2,262,056 | 2,210,020
Operating expenses |  |  |  |
Fuel oil | 309,432 | 283,360 | 865,989 | 877,738
Purchased power | 192,882 | 194,861 | 546,121 | 526,669
Other operation and maintenance | 108,313 | 104,513 | 295,483 | 300,723
Depreciation | 41,594 | 38,995 | 124,790 | 115,865
Taxes, other than income taxes | 75,188 | 72,472 | 212,783 | 209,076
Total expenses | 727,409 | 694,201 | 2,045,166 | 2,030,071
Operating income | 76,156 | 69,853 | 216,890 | 179,949
Other income (loss) |  |  |  |
Allowance for equity funds used during construction | 1,937 | 1,255 | 4,933 | 4,030
Interest expense and other charges, net | (16,414) | (15,033) | (48,989) | (43,960)
Interest and other charges |  |  |  |
Allowance for borrowed funds used during construction | 740 | 498 | 1,877 | 1,626
Income before income taxes | 62,419 | 56,573 | 174,711 | 141,645
Income taxes | 23,042 | 18,258 | 64,686 | 49,210
Net income | 39,377 | 38,315 | 110,025 | 92,435
Preferred stock dividends of subsidiaries | 228 | 228 | 686 | 686
Net income attributable to Hawaiian Electric | 39,149 | 38,087 | 109,339 | 91,749
Preferred stock dividends of Hawaiian Electric | 270 | 270 | 810 | 810
Net income for common stock | $ 38,879 | $ 37,817 | $ 108,529 | $ 90,939

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