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Electric utility subsidiary - Consolidating balance sheet (unaudited) (Details 3) - USD ($) $ in Thousands | Jun. 30, 2015 | Dec. 31, 2014 | Jun. 30, 2014 | Dec. 31, 2013
--- | --- | --- | --- | ---
Utility plant, at cost |  |  |  |
Total property, plant and equipment, net | $ 4,269,241 | $ 4,148,774 |  |
Other long-term assets |  |  |  |
Total assets | 11,439,631 | 11,185,142 |  |
Capitalization |  |  |  |
Common stock equity | 1,898,520 | 1,790,573 | $ 1,759,935 | $ 1,726,406
Cumulative preferred stock — not subject to mandatory redemption | 0 | 0 |  |
Current liabilities |  |  |  |
Interest and preferred dividends payable | 25,360 | 25,336 |  |
Deferred credits and other liabilities |  |  |  |
Deferred income taxes | 632,718 | 633,570 |  |
Contributions in aid of construction | 482,760 | 466,432 |  |
Total liabilities and shareholders’ equity | 11,439,631 | 11,185,142 |  |
Hawaiian Electric Company |  |  |  |
Utility plant, at cost |  |  |  |
Land | 43,542 | 43,819 |  |
Plant and equipment | 3,889,544 | 3,782,438 |  |
Less accumulated depreciation | (1,275,328) | (1,253,866) |  |
Construction in progress | 162,872 | 134,376 |  |
Utility property, plant and equipment, net | 2,820,630 | 2,706,767 |  |
Nonutility property, plant and equipment, less accumulated depreciation | 4,949 | 4,950 |  |
Total property, plant and equipment, net | 2,825,579 | 2,711,717 |  |
Investment in wholly owned subsidiaries, at equity | 543,351 | 538,639 |  |
Current assets |  |  |  |
Cash and cash equivalents | 3,393 | 12,416 | 8,106 | 61,245
Advances to affiliates | 18,200 | 16,100 |  |
Customer accounts receivable, net | 95,975 | 111,462 |  |
Accrued unbilled revenues, net | 80,165 | 103,072 |  |
Other accounts receivable, net | 11,816 | 9,980 |  |
Fuel oil stock, at average cost | 85,710 | 74,515 |  |
Materials and supplies, at average cost | 32,857 | 33,154 |  |
Prepayments and other | 23,986 | 44,680 |  |
Regulatory assets | 82,751 | 58,550 |  |
Total current assets | 434,853 | 463,929 |  |
Other long-term assets |  |  |  |
Regulatory assets | 601,012 | 623,784 |  |
Unamortized debt expense | 5,397 | 5,640 |  |
Other | 52,211 | 53,106 |  |
Total other long-term assets | 658,620 | 682,530 |  |
Total assets | 4,462,403 | 4,396,815 |  |
Capitalization |  |  |  |
Common stock equity | 1,696,658 | 1,682,144 | 1,618,987 | 1,593,564
Cumulative preferred stock — not subject to mandatory redemption | 22,293 | 22,293 |  |
Long-term debt, net | 830,546 | 830,546 |  |
Total capitalization | 2,549,497 | 2,534,983 |  |
Current liabilities |  |  |  |
Short-term borrowings from non-affiliates | 88,993 |  |  |
Short-term borrowings from affiliate | 0 | 0 |  |
Accounts payable | 113,360 | 122,433 |  |
Interest and preferred dividends payable | 15,435 | 15,407 |  |
Taxes accrued | 130,919 | 176,339 |  |
Regulatory liabilities | 286 | 191 |  |
Other | 51,946 | 48,282 |  |
Total current liabilities | 400,939 | 362,652 |  |
Deferred credits and other liabilities |  |  |  |
Deferred income taxes | 428,866 | 429,515 |  |
Regulatory liabilities | 245,038 | 236,727 |  |
Unamortized tax credits | 53,632 | 49,865 |  |
Defined benefit pension and other postretirement benefit plans liability | 436,946 | 446,888 |  |
Other | 47,777 | 52,446 |  |
Total deferred credits and other liabilities | 1,212,259 | 1,215,441 |  |
Contributions in aid of construction | 299,708 | 283,739 |  |
Total liabilities and shareholders’ equity | 4,462,403 | 4,396,815 |  |
HELCO |  |  |  |
Utility plant, at cost |  |  |  |
Land | 5,464 | 5,464 |  |
Plant and equipment | 1,187,999 | 1,179,032 |  |
Less accumulated depreciation | (484,930) | (473,933) |  |
Construction in progress | 18,754 | 12,421 |  |
Utility property, plant and equipment, net | 727,287 | 722,984 |  |
Nonutility property, plant and equipment, less accumulated depreciation | 82 | 82 |  |
Total property, plant and equipment, net | 727,369 | 723,066 |  |
Current assets |  |  |  |
Cash and cash equivalents | 801 | 612 | 1,754 | 1,326
Advances to affiliates | 0 | 0 |  |
Customer accounts receivable, net | 23,981 | 24,222 |  |
Accrued unbilled revenues, net | 13,772 | 15,926 |  |
Other accounts receivable, net | 2,009 | 981 |  |
Fuel oil stock, at average cost | 8,350 | 13,800 |  |
Materials and supplies, at average cost | 7,172 | 6,664 |  |
Prepayments and other | 3,345 | 8,611 |  |
Regulatory assets | 8,829 | 6,745 |  |
Total current assets | 68,259 | 77,561 |  |
Other long-term assets |  |  |  |
Regulatory assets | 105,093 | 107,454 |  |
Unamortized debt expense | 1,353 | 1,438 |  |
Other | 15,303 | 15,366 |  |
Total other long-term assets | 121,749 | 124,258 |  |
Total assets | 917,377 | 924,885 |  |
Capitalization |  |  |  |
Common stock equity | 285,104 | 281,846 | 278,995 | 274,802
Cumulative preferred stock — not subject to mandatory redemption | 7,000 | 7,000 |  |
Long-term debt, net | 190,000 | 190,000 |  |
Total capitalization | 482,104 | 478,846 |  |
Current liabilities |  |  |  |
Current portion of long-term debt | 0 |  |  |
Short-term borrowings from affiliate | 13,000 | 10,500 |  |
Accounts payable | 16,479 | 23,728 |  |
Interest and preferred dividends payable | 3,962 | 3,989 |  |
Taxes accrued | 29,577 | 37,548 |  |
Regulatory liabilities | 0 | 0 |  |
Other | 9,237 | 9,866 |  |
Total current liabilities | 72,255 | 85,631 |  |
Deferred credits and other liabilities |  |  |  |
Deferred income taxes | 91,220 | 90,119 |  |
Regulatory liabilities | 81,195 | 77,707 |  |
Unamortized tax credits | 15,290 | 14,902 |  |
Defined benefit pension and other postretirement benefit plans liability | 67,802 | 72,547 |  |
Other | 13,142 | 10,658 |  |
Total deferred credits and other liabilities | 268,649 | 265,933 |  |
Contributions in aid of construction | 94,369 | 94,475 |  |
Total liabilities and shareholders’ equity | 917,377 | 924,885 |  |
Maui Electric |  |  |  |
Utility plant, at cost |  |  |  |
Land | 3,016 | 3,016 |  |
Plant and equipment | 1,064,686 | 1,048,012 |  |
Less accumulated depreciation | (458,445) | (447,711) |  |
Construction in progress | 14,729 | 11,819 |  |
Utility property, plant and equipment, net | 623,986 | 615,136 |  |
Nonutility property, plant and equipment, less accumulated depreciation | 1,531 | 1,531 |  |
Total property, plant and equipment, net | 625,517 | 616,667 |  |
Current assets |  |  |  |
Cash and cash equivalents | 175 | 633 | 2,759 | 153
Customer accounts receivable, net | 19,966 | 22,800 |  |
Accrued unbilled revenues, net | 15,507 | 18,376 |  |
Other accounts receivable, net | 2,703 | 2,246 |  |
Fuel oil stock, at average cost | 14,348 | 17,731 |  |
Materials and supplies, at average cost | 17,326 | 17,432 |  |
Prepayments and other | 8,882 | 13,567 |  |
Regulatory assets | 7,656 | 6,126 |  |
Total current assets | 86,563 | 98,911 |  |
Other long-term assets |  |  |  |
Regulatory assets | 99,218 | 102,788 |  |
Unamortized debt expense | 1,150 | 1,245 |  |
Other | 14,418 | 13,366 |  |
Total other long-term assets | 114,786 | 117,399 |  |
Total assets | 826,866 | 832,977 |  |
Capitalization |  |  |  |
Common stock equity | 258,146 | 256,692 | 250,365 | 248,771
Cumulative preferred stock — not subject to mandatory redemption | 5,000 | 5,000 |  |
Long-term debt, net | 186,000 | 186,000 |  |
Total capitalization | 449,146 | 447,692 |  |
Current liabilities |  |  |  |
Short-term borrowings from affiliate | 5,200 | 5,600 |  |
Accounts payable | 17,911 | 17,773 |  |
Interest and preferred dividends payable | 2,976 | 2,931 |  |
Taxes accrued | 28,408 | 36,807 |  |
Regulatory liabilities | 477 | 441 |  |
Other | 15,834 | 16,094 |  |
Total current liabilities | 70,806 | 79,646 |  |
Deferred credits and other liabilities |  |  |  |
Deferred income taxes | 85,616 | 83,238 |  |
Regulatory liabilities | 30,093 | 29,966 |  |
Unamortized tax credits | 14,971 | 14,725 |  |
Defined benefit pension and other postretirement benefit plans liability | 73,889 | 75,960 |  |
Other | 13,662 | 13,532 |  |
Total deferred credits and other liabilities | 218,231 | 217,421 |  |
Contributions in aid of construction | 88,683 | 88,218 |  |
Total liabilities and shareholders’ equity | 826,866 | 832,977 |  |
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 plant, at cost |  |  |  |
Investment in wholly owned subsidiaries, at equity | (543,351) | (538,639) |  |
Current assets |  |  |  |
Cash and cash equivalents | 0 | 0 | 0 | 0
Advances to affiliates | (18,200) | (16,100) |  |
Other accounts receivable, net | (10,638) | (8,924) |  |
Prepayments and other | (251) | (475) |  |
Total current assets | (29,089) | (25,499) |  |
Other long-term assets |  |  |  |
Regulatory assets | 0 | (183) |  |
Total other long-term assets | 0 | (183) |  |
Total assets | (572,440) | (564,321) |  |
Capitalization |  |  |  |
Common stock equity | (543,351) | (538,639) | (529,461) | (523,674)
Total capitalization | (543,351) | (538,639) |  |
Current liabilities |  |  |  |
Short-term borrowings from affiliate | (18,200) | (16,100) |  |
Interest and preferred dividends payable | (6) | (11) |  |
Taxes accrued | (251) | (292) |  |
Regulatory liabilities | 0 | 0 |  |
Other | (10,632) | (9,096) |  |
Total current liabilities | (29,089) | (25,499) |  |
Deferred credits and other liabilities |  |  |  |
Regulatory liabilities | 0 | (183) |  |
Total deferred credits and other liabilities | 0 | (183) |  |
Total liabilities and shareholders’ equity | (572,440) | (564,321) |  |
HECO Consolidated |  |  |  |
Utility plant, at cost |  |  |  |
Land | 52,022 | 52,299 |  |
Plant and equipment | 6,142,229 | 6,009,482 |  |
Less accumulated depreciation | (2,218,703) | (2,175,510) |  |
Construction in progress | 196,355 | 158,616 |  |
Utility property, plant and equipment, net | 4,171,903 | 4,044,887 |  |
Nonutility property, plant and equipment, less accumulated depreciation | 6,562 | 6,563 |  |
Total property, plant and equipment, net | 4,178,465 | 4,051,450 |  |
Current assets |  |  |  |
Cash and cash equivalents | 4,470 | 13,762 | 12,720 | 62,825
Customer accounts receivable, net | 139,922 | 158,484 |  |
Accrued unbilled revenues, net | 109,444 | 137,374 |  |
Other accounts receivable, net | 5,890 | 4,283 |  |
Fuel oil stock, at average cost | 108,408 | 106,046 |  |
Materials and supplies, at average cost | 57,355 | 57,250 |  |
Prepayments and other | 35,962 | 66,383 |  |
Regulatory assets | 99,236 | 71,421 |  |
Total current assets | 560,687 | 615,003 |  |
Other long-term assets |  |  |  |
Regulatory assets | 805,323 | 833,843 |  |
Unamortized debt expense | 7,900 | 8,323 |  |
Other | 81,932 | 81,838 |  |
Total other long-term assets | 895,155 | 924,004 |  |
Total assets | 5,634,307 | 5,590,457 |  |
Capitalization |  |  |  |
Common stock equity | 1,696,658 | 1,682,144 | $ 1,618,987 | $ 1,593,564
Cumulative preferred stock — not subject to mandatory redemption | 34,293 | 34,293 |  |
Long-term debt, net | 1,206,546 | 1,206,546 |  |
Total capitalization | 2,937,497 | 2,922,983 |  |
Current liabilities |  |  |  |
Current portion of long-term debt | 0 |  |  |
Short-term borrowings from non-affiliates | 88,993 | 0 |  |
Accounts payable | 147,750 | 163,934 |  |
Interest and preferred dividends payable | 22,367 | 22,316 |  |
Taxes accrued | 188,653 | 250,402 |  |
Regulatory liabilities | 763 | 632 |  |
Other | 66,385 | 65,146 |  |
Total current liabilities | 514,911 | 502,430 |  |
Deferred credits and other liabilities |  |  |  |
Deferred income taxes | 605,702 | 602,872 |  |
Regulatory liabilities | 356,326 | 344,217 |  |
Unamortized tax credits | 83,893 | 79,492 |  |
Defined benefit pension and other postretirement benefit plans liability | 578,637 | 595,395 |  |
Other | 74,581 | 76,636 |  |
Total deferred credits and other liabilities | 1,699,139 | 1,698,612 |  |
Contributions in aid of construction | 482,760 | 466,432 |  |
Total liabilities and shareholders’ equity | $ 5,634,307 | $ 5,590,457 |  |

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