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Electric utility segment - Consolidating balance sheet (Details) - USD ($) $ in Thousands | Mar. 31, 2016 | Dec. 31, 2015 | Mar. 31, 2015 | Dec. 31, 2014
--- | --- | --- | --- | ---
Utility property, plant and equipment |  |  |  |
Total property, plant and equipment, net | $ 4,423,567 | $ 4,377,658 |  |
Other long-term assets |  |  |  |
Total assets | 11,870,506 | 11,782,018 |  |
Capitalization |  |  |  |
Common stock equity | 1,942,179 | 1,927,640 | $ 1,897,909 | $ 1,790,573
Cumulative preferred stock — not subject to mandatory redemption | 0 | 0 |  |
Current liabilities |  |  |  |
Interest and preferred dividends payable | 27,890 | 26,042 |  |
Deferred credits and other liabilities |  |  |  |
Deferred income taxes | 700,782 | 680,877 |  |
Contributions in aid of construction | 513,520 | 506,087 |  |
Total liabilities and shareholders’ equity | 11,870,506 | 11,782,018 |  |
Hawaiian Electric Company |  |  |  |
Utility property, plant and equipment |  |  |  |
Land | 43,972 | 43,557 |  |
Plant and equipment | 4,059,986 | 4,026,079 |  |
Less accumulated depreciation | (1,325,559) | (1,316,467) |  |
Construction in progress | 163,196 | 147,979 |  |
Utility property, plant and equipment, net | 2,941,595 | 2,901,148 |  |
Nonutility property, plant and equipment, less accumulated depreciation | 5,762 | 5,659 |  |
Total property, plant and equipment, net | 2,947,357 | 2,906,807 |  |
Investment in wholly owned subsidiaries, at equity | 557,885 | 556,528 |  |
Current assets |  |  |  |
Cash and cash equivalents | 29,307 | 16,281 | 5,484 | 12,416
Advances to affiliates | 0 | 0 |  |
Customer accounts receivable, net | 69,744 | 93,515 |  |
Accrued unbilled revenues, net | 60,022 | 60,080 |  |
Other accounts receivable, net | 13,180 | 16,421 |  |
Fuel oil stock, at average cost | 34,553 | 49,455 |  |
Materials and supplies, at average cost | 30,543 | 30,921 |  |
Prepayments and other | 18,430 | 25,505 |  |
Regulatory assets | 80,918 | 63,615 |  |
Total current assets | 336,697 | 355,793 |  |
Other long-term assets |  |  |  |
Regulatory assets | 586,873 | 608,957 |  |
Unamortized debt expense | 304 | 359 |  |
Other | 47,516 | 47,731 |  |
Total other long-term assets | 634,693 | 657,047 |  |
Total assets | 4,476,632 | 4,476,175 |  |
Capitalization |  |  |  |
Common stock equity | 1,731,304 | 1,728,325 | 1,686,434 | 1,682,144
Cumulative preferred stock — not subject to mandatory redemption | 22,293 | 22,293 |  |
Long-term debt, net | 875,308 | 875,163 |  |
Total capitalization | 2,628,905 | 2,625,781 |  |
Current liabilities |  |  |  |
Short-term borrowings from non-affiliates | 12,998 |  |  |
Short-term borrowings from affiliate | 19,500 | 23,000 |  |
Accounts payable | 73,021 | 84,631 |  |
Interest and preferred dividends payable | 18,543 | 15,747 |  |
Taxes accrued | 87,303 | 131,668 |  |
Regulatory liabilities | 0 | 0 |  |
Other | 62,307 | 41,083 |  |
Total current liabilities | 273,672 | 296,129 |  |
Deferred credits and other liabilities |  |  |  |
Deferred income taxes | 477,446 | 466,133 |  |
Regulatory liabilities | 259,907 | 254,033 |  |
Unamortized tax credits | 55,446 | 54,078 |  |
Defined benefit pension and other postretirement benefit plans liability | 405,024 | 409,021 |  |
Other | 49,944 | 51,273 |  |
Total deferred credits and other liabilities | 1,247,767 | 1,234,538 |  |
Contributions in aid of construction | 326,288 | 319,727 |  |
Total liabilities and shareholders’ equity | 4,476,632 | 4,476,175 |  |
HELCO |  |  |  |
Utility property, plant and equipment |  |  |  |
Land | 6,219 | 6,219 |  |
Plant and equipment | 1,213,924 | 1,212,195 |  |
Less accumulated depreciation | (490,883) | (486,028) |  |
Construction in progress | 16,648 | 11,455 |  |
Utility property, plant and equipment, net | 745,908 | 743,841 |  |
Nonutility property, plant and equipment, less accumulated depreciation | 82 | 82 |  |
Total property, plant and equipment, net | 745,990 | 743,923 |  |
Current assets |  |  |  |
Cash and cash equivalents | 12,070 | 2,682 | 1,654 | 612
Advances to affiliates | 12,500 | 15,500 |  |
Customer accounts receivable, net | 18,399 | 20,508 |  |
Accrued unbilled revenues, net | 12,857 | 12,531 |  |
Other accounts receivable, net | 1,271 | 1,275 |  |
Fuel oil stock, at average cost | 5,688 | 8,310 |  |
Materials and supplies, at average cost | 6,892 | 6,865 |  |
Prepayments and other | 2,223 | 9,091 |  |
Regulatory assets | 5,563 | 4,501 |  |
Total current assets | 77,463 | 81,263 |  |
Other long-term assets |  |  |  |
Regulatory assets | 112,052 | 114,562 |  |
Unamortized debt expense | 60 | 74 |  |
Other | 14,129 | 14,693 |  |
Total other long-term assets | 126,241 | 129,329 |  |
Total assets | 949,694 | 954,515 |  |
Capitalization |  |  |  |
Common stock equity | 293,358 | 292,702 | 283,129 | 281,846
Cumulative preferred stock — not subject to mandatory redemption | 7,000 | 7,000 |  |
Long-term debt, net | 213,608 | 213,580 |  |
Total capitalization | 513,966 | 513,282 |  |
Current liabilities |  |  |  |
Short-term borrowings from affiliate | 0 | 0 |  |
Accounts payable | 12,391 | 17,702 |  |
Interest and preferred dividends payable | 4,173 | 4,255 |  |
Taxes accrued | 22,787 | 30,342 |  |
Regulatory liabilities | 4,063 | 1,030 |  |
Other | 9,019 | 8,760 |  |
Total current liabilities | 52,433 | 62,089 |  |
Deferred credits and other liabilities |  |  |  |
Deferred income taxes | 102,039 | 100,681 |  |
Regulatory liabilities | 87,514 | 84,623 |  |
Unamortized tax credits | 15,555 | 15,406 |  |
Defined benefit pension and other postretirement benefit plans liability | 69,103 | 69,893 |  |
Other | 13,625 | 13,243 |  |
Total deferred credits and other liabilities | 287,836 | 283,846 |  |
Contributions in aid of construction | 95,459 | 95,298 |  |
Total liabilities and shareholders’ equity | 949,694 | 954,515 |  |
Maui Electric |  |  |  |
Utility property, plant and equipment |  |  |  |
Land | 3,016 | 3,016 |  |
Plant and equipment | 1,082,096 | 1,077,424 |  |
Less accumulated depreciation | (468,486) | (463,509) |  |
Construction in progress | 18,160 | 15,875 |  |
Utility property, plant and equipment, net | 634,786 | 632,806 |  |
Nonutility property, plant and equipment, less accumulated depreciation | 1,531 | 1,531 |  |
Total property, plant and equipment, net | 636,317 | 634,337 |  |
Current assets |  |  |  |
Cash and cash equivalents | 7,564 | 5,385 | 881 | 633
Advances to affiliates | 7,000 | 7,500 |  |
Customer accounts receivable, net | 15,596 | 18,755 |  |
Accrued unbilled revenues, net | 12,488 | 11,898 |  |
Other accounts receivable, net | 1,269 | 1,674 |  |
Fuel oil stock, at average cost | 8,163 | 13,451 |  |
Materials and supplies, at average cost | 16,821 | 16,643 |  |
Prepayments and other | 2,436 | 2,295 |  |
Regulatory assets | 2,711 | 4,115 |  |
Total current assets | 74,048 | 81,716 |  |
Other long-term assets |  |  |  |
Regulatory assets | 100,291 | 100,981 |  |
Unamortized debt expense | 56 | 64 |  |
Other | 12,850 | 13,062 |  |
Total other long-term assets | 113,197 | 114,107 |  |
Total assets | 823,562 | 830,160 |  |
Capitalization |  |  |  |
Common stock equity | 264,426 | 263,725 | 256,802 | 256,692
Cumulative preferred stock — not subject to mandatory redemption | 5,000 | 5,000 |  |
Long-term debt, net | 190,000 | 189,959 |  |
Total capitalization | 459,426 | 458,684 |  |
Current liabilities |  |  |  |
Short-term borrowings from affiliate | 0 | 0 |  |
Accounts payable | 9,678 | 12,513 |  |
Interest and preferred dividends payable | 4,301 | 3,113 |  |
Taxes accrued | 20,435 | 29,325 |  |
Regulatory liabilities | 1,353 | 1,174 |  |
Other | 12,625 | 13,194 |  |
Total current liabilities | 48,392 | 59,319 |  |
Deferred credits and other liabilities |  |  |  |
Deferred income taxes | 90,353 | 87,706 |  |
Regulatory liabilities | 30,956 | 30,683 |  |
Unamortized tax credits | 14,901 | 14,730 |  |
Defined benefit pension and other postretirement benefit plans liability | 73,390 | 74,060 |  |
Other | 14,371 | 13,916 |  |
Total deferred credits and other liabilities | 223,971 | 221,095 |  |
Contributions in aid of construction | 91,773 | 91,062 |  |
Total liabilities and shareholders’ equity | 823,562 | 830,160 |  |
Other subsidiaries |  |  |  |
Current assets |  |  |  |
Cash and cash equivalents | 101 | 101 | 101 | 101
Total current assets | 101 | 101 |  |
Other long-term assets |  |  |  |
Total assets | 101 | 101 |  |
Capitalization |  |  |  |
Common stock equity | 101 | 101 | 101 | 101
Total capitalization | 101 | 101 |  |
Deferred credits and other liabilities |  |  |  |
Total liabilities and shareholders’ equity | 101 | 101 |  |
Consolidating adjustments |  |  |  |
Utility property, plant and equipment |  |  |  |
Investment in wholly owned subsidiaries, at equity | (557,885) | (556,528) |  |
Current assets |  |  |  |
Cash and cash equivalents | 0 | 0 | 0 | 0
Advances to affiliates | (19,500) | (23,000) |  |
Other accounts receivable, net | (8,947) | (8,962) |  |
Prepayments and other | (1,286) | (251) |  |
Total current assets | (29,733) | (32,213) |  |
Other long-term assets |  |  |  |
Regulatory assets | 0 | 0 |  |
Total other long-term assets | 0 | 0 |  |
Total assets | (587,618) | (588,741) |  |
Capitalization |  |  |  |
Common stock equity | (557,885) | (556,528) | (540,032) | (538,639)
Total capitalization | (557,885) | (556,528) |  |
Current liabilities |  |  |  |
Short-term borrowings from affiliate | (19,500) | (23,000) |  |
Interest and preferred dividends payable | (2) | (4) |  |
Taxes accrued | (1,286) | (251) |  |
Regulatory liabilities | 0 | 0 |  |
Other | (8,945) | (8,958) |  |
Total current liabilities | (29,733) | (32,213) |  |
Deferred credits and other liabilities |  |  |  |
Deferred income taxes | 288 | 286 |  |
Regulatory liabilities | 0 | 0 |  |
Defined benefit pension and other postretirement benefit plans liability | 0 |  |  |
Other | (288) | (286) |  |
Total deferred credits and other liabilities | 0 | 0 |  |
Total liabilities and shareholders’ equity | (587,618) | (588,741) |  |
Hawaiian Electric Company, Inc. and Subsidiaries |  |  |  |
Utility property, plant and equipment |  |  |  |
Land | 53,207 | 52,792 |  |
Plant and equipment | 6,356,006 | 6,315,698 |  |
Less accumulated depreciation | (2,284,928) | (2,266,004) |  |
Construction in progress | 198,004 | 175,309 |  |
Utility property, plant and equipment, net | 4,322,289 | 4,277,795 |  |
Nonutility property, plant and equipment, less accumulated depreciation | 7,375 | 7,272 |  |
Total property, plant and equipment, net | 4,329,664 | 4,285,067 |  |
Current assets |  |  |  |
Cash and cash equivalents | 49,042 | 24,449 | 8,120 | 13,762
Advances to affiliates | 0 |  |  |
Customer accounts receivable, net | 103,739 | 132,778 |  |
Accrued unbilled revenues, net | 85,367 | 84,509 |  |
Other accounts receivable, net | 6,773 | 10,408 |  |
Fuel oil stock, at average cost | 48,404 | 71,216 |  |
Materials and supplies, at average cost | 54,256 | 54,429 |  |
Prepayments and other | 21,803 | 36,640 |  |
Regulatory assets | 89,192 | 72,231 |  |
Total current assets | 458,576 | 486,660 |  |
Other long-term assets |  |  |  |
Regulatory assets | 799,216 | 824,500 |  |
Unamortized debt expense | 420 | 497 |  |
Other | 74,495 | 75,486 |  |
Total other long-term assets | 874,131 | 900,483 |  |
Total assets | 5,662,371 | 5,672,210 |  |
Capitalization |  |  |  |
Common stock equity | 1,731,304 | 1,728,325 | $ 1,686,434 | $ 1,682,144
Cumulative preferred stock — not subject to mandatory redemption | 34,293 | 34,293 |  |
Long-term debt, net | 1,278,916 | 1,278,702 |  |
Total capitalization | 3,044,513 | 3,041,320 |  |
Current liabilities |  |  |  |
Short-term borrowings from non-affiliates | 12,998 | 0 |  |
Accounts payable | 95,090 | 114,846 |  |
Interest and preferred dividends payable | 27,015 | 23,111 |  |
Taxes accrued | 129,239 | 191,084 |  |
Regulatory liabilities | 5,416 | 2,204 |  |
Other | 75,006 | 54,079 |  |
Total current liabilities | 344,764 | 385,324 |  |
Deferred credits and other liabilities |  |  |  |
Deferred income taxes | 670,126 | 654,806 |  |
Regulatory liabilities | 378,377 | 369,339 |  |
Unamortized tax credits | 85,902 | 84,214 |  |
Defined benefit pension and other postretirement benefit plans liability | 547,517 | 552,974 |  |
Other | 77,652 | 78,146 |  |
Total deferred credits and other liabilities | 1,759,574 | 1,739,479 |  |
Contributions in aid of construction | 513,520 | 506,087 |  |
Total liabilities and shareholders’ equity | $ 5,662,371 | $ 5,672,210 |  |

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Data Type: | na
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