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Electric utility segment (Details 9) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2007
--- | --- | --- | --- | --- | ---
Total assets | $ 10,340,044 | $ 10,149,132 |  |  |
Cumulative preferred stock-not subject to mandatory redemption | 0 | 0 |  |  |
Interest and dividends payable | 26,716 | 26,258 |  |  |
Deferred income taxes | 529,260 | 439,329 |  |  |
Contributions in aid of construction | 432,894 | 405,520 |  |  |
Total liabilities and shareholders' equity | 10,340,044 | 10,149,132 |  |  |
HECO |  |  |  |  |
Land | 43,407 | 43,370 |  |  |
Plant and equipment | 3,558,569 | 3,325,862 |  |  |
Less accumulated depreciation | (1,222,129) | (1,185,899) |  |  |
Construction in progress | 124,494 | 130,143 |  |  |
Net utility plant | 2,504,341 | 2,313,476 |  |  |
Investment in wholly-owned subsidiaries, at equity | 523,674 | 497,939 |  |  |
Cash and cash equivalents | 61,245 | 8,265 | 44,819 | 121,019 |
Advances to affiliates | 6,839 | 9,400 |  |  |
Customer accounts receivable, net | 121,282 | 154,316 |  |  |
Accrued unbilled revenues, net | 107,752 | 100,600 |  |  |
Other accounts receivable, net | 16,373 | 33,313 |  |  |
Fuel oil stock, at average cost | 99,613 | 123,176 |  |  |
Materials and supplies, at average cost | 37,377 | 31,779 |  |  |
Prepayments and other | 29,798 | 21,708 |  |  |
Regulatory assets | 54,979 | 42,675 |  |  |
Total current assets | 535,258 | 525,232 |  |  |
Regulatory assets | 381,346 | 601,451 |  |  |
Unamortized debt expense | 6,051 | 7,042 |  |  |
Other | 47,116 | 46,586 |  |  |
Total other long-term assets | 434,513 | 655,079 |  |  |
Total assets | 3,997,786 | 3,991,726 |  |  |
Common stock equity | 1,593,564 | 1,472,136 |  |  |
Cumulative preferred stock-not subject to mandatory redemption | 22,293 | 22,293 |  |  |
Long-term debt, net | 830,547 | 780,546 |  |  |
Total capitalization | 2,446,404 | 2,274,975 |  |  |
Current portion of long-term debt | 0 |  |  |  |
Short-term borrowings-affiliate | 1,000 | 18,050 |  |  |
Accounts payable | 145,062 | 134,651 |  |  |
Interest and dividends payable | 15,190 | 14,479 |  |  |
Taxes accrued | 175,790 | 174,477 |  |  |
Regulatory liabilities | 1,705 | 1,212 |  |  |
Other | 48,443 | 45,125 |  |  |
Total current liabilities | 387,190 | 387,994 |  |  |
Deferred income taxes | 359,621 | 302,569 |  |  |
Regulatory liabilities | 235,786 | 219,303 |  |  |
Unamortized tax credits | 44,931 | 39,827 |  |  |
Defined benefit pension and other postretirement benefit plans liability | 202,396 | 459,765 |  |  |
Other | 63,374 | 68,783 |  |  |
Total deferred credits and other liabilities | 906,108 | 1,090,247 |  |  |
Contributions in aid of construction | 258,084 | 238,510 |  |  |
Total liabilities and shareholders' equity | 3,997,786 | 3,991,726 |  |  |
Consolidating adjustments |  |  |  |  |
Investment in wholly-owned subsidiaries, at equity | (523,674) | (497,939) |  |  |
Advances to affiliates | (7,839) | (27,450) |  |  |
Other accounts receivable, net | (9,027) | (9,275) |  |  |
Prepayments and other | (1,415) | 0 |  |  |
Total current assets | (18,281) | (36,725) |  |  |
Total assets | (541,955) | (534,664) |  |  |
Common stock equity | (523,674) | (497,939) |  |  |
Total capitalization | (523,674) | (497,939) |  |  |
Current portion of long-term debt | 0 |  |  |  |
Short-term borrowings-affiliate | (7,839) | (27,450) |  |  |
Interest and dividends payable | (8) | (7) |  |  |
Taxes accrued | (1,415) | 0 |  |  |
Regulatory liabilities |  | 0 |  |  |
Other | (9,019) | (9,268) |  |  |
Total current liabilities | (18,281) | (36,725) |  |  |
Total liabilities and shareholders' equity | (541,955) | (534,664) |  |  |
HELCO |  |  |  |  |
Land | 5,460 | 5,182 |  |  |
Plant and equipment | 1,136,923 | 1,086,048 |  |  |
Less accumulated depreciation | (453,721) | (433,531) |  |  |
Construction in progress | 7,709 | 12,126 |  |  |
Net utility plant | 696,371 | 669,825 |  |  |
Cash and cash equivalents | 1,326 | 5,441 | 3,383 | 1,229 |
Advances to affiliates | 1,000 | 18,050 |  |  |
Customer accounts receivable, net | 28,088 | 29,772 |  |  |
Accrued unbilled revenues, net | 17,100 | 14,393 |  |  |
Other accounts receivable, net | 4,265 | 1,122 |  |  |
Fuel oil stock, at average cost | 14,178 | 15,485 |  |  |
Materials and supplies, at average cost | 6,883 | 5,336 |  |  |
Prepayments and other | 8,334 | 5,146 |  |  |
Regulatory assets | 6,931 | 4,056 |  |  |
Total current assets | 88,105 | 98,801 |  |  |
Regulatory assets | 64,552 | 109,815 |  |  | 12,800
Unamortized debt expense | 1,580 | 2,066 |  |  |
Other | 11,352 | 9,871 |  |  |
Total other long-term assets | 77,484 | 121,752 |  |  |
Total assets | 861,960 | 890,378 |  |  |
Common stock equity | 274,802 | 268,908 |  |  |
Cumulative preferred stock-not subject to mandatory redemption | 7,000 | 7,000 |  |  |
Long-term debt, net | 189,998 | 201,326 |  |  |
Total capitalization | 471,800 | 477,234 |  |  |
Current portion of long-term debt | 11,400 |  |  |  |
Accounts payable | 24,383 | 27,457 |  |  |
Interest and dividends payable | 3,885 | 4,027 |  |  |
Taxes accrued | 37,899 | 38,778 |  |  |
Regulatory liabilities |  | 0 |  |  |
Other | 9,033 | 10,310 |  |  |
Total current liabilities | 86,600 | 80,572 |  |  |
Deferred income taxes | 79,947 | 68,479 |  |  |
Regulatory liabilities | 76,475 | 67,359 |  |  |
Unamortized tax credits | 14,245 | 13,450 |  |  |
Defined benefit pension and other postretirement benefit plans liability | 28,427 | 80,686 |  |  |
Other | 14,703 | 17,799 |  |  |
Total deferred credits and other liabilities | 213,797 | 247,773 |  |  |
Contributions in aid of construction | 89,763 | 84,799 |  |  |
Total liabilities and shareholders' equity | 861,960 | 890,378 |  |  |
MECO |  |  |  |  |
Land | 3,016 | 3,016 |  |  |
Plant and equipment | 1,006,383 | 952,490 |  |  |
Less accumulated depreciation | (435,379) | (421,359) |  |  |
Construction in progress | 11,030 | 9,109 |  |  |
Net utility plant | 585,050 | 543,256 |  |  |
Cash and cash equivalents | 153 | 3,349 | 496 | 594 |
Advances to affiliates |  | 0 |  |  |
Customer accounts receivable, net | 26,078 | 26,691 |  |  |
Accrued unbilled revenues, net | 19,272 | 19,305 |  |  |
Other accounts receivable, net | 2,451 | 3,016 |  |  |
Fuel oil stock, at average cost | 20,296 | 22,758 |  |  |
Materials and supplies, at average cost | 14,784 | 13,970 |  |  |
Prepayments and other | 16,140 | 6,011 |  |  |
Regulatory assets | 7,828 | 4,536 |  |  |
Total current assets | 107,002 | 99,636 |  |  |
Regulatory assets | 60,288 | 102,063 |  |  |
Unamortized debt expense | 1,372 | 1,446 |  |  |
Other | 15,525 | 14,848 |  |  |
Total other long-term assets | 77,185 | 118,357 |  |  |
Total assets | 769,237 | 761,249 |  |  |
Common stock equity | 248,771 | 228,927 |  |  |
Cumulative preferred stock-not subject to mandatory redemption | 5,000 | 5,000 |  |  |
Long-term debt, net | 186,000 | 166,000 |  |  |
Total capitalization | 439,771 | 399,927 |  |  |
Current portion of long-term debt | 0 |  |  |  |
Short-term borrowings-affiliate | 6,839 | 9,400 |  |  |
Accounts payable | 20,114 | 24,716 |  |  |
Interest and dividends payable | 2,585 | 2,593 |  |  |
Taxes accrued | 37,171 | 37,811 |  |  |
Regulatory liabilities | 211 | 0 |  |  |
Other | 15,424 | 14,634 |  |  |
Total current liabilities | 82,344 | 89,154 |  |  |
Deferred income taxes | 67,593 | 46,563 |  |  |
Regulatory liabilities | 35,122 | 36,278 |  |  |
Unamortized tax credits | 14,363 | 13,307 |  |  |
Defined benefit pension and other postretirement benefit plans liability | 31,339 | 79,754 |  |  |
Other | 13,658 | 14,055 |  |  |
Total deferred credits and other liabilities | 162,075 | 189,957 |  |  |
Contributions in aid of construction | 85,047 | 82,211 |  |  |
Total liabilities and shareholders' equity | 769,237 | 761,249 |  |  |
HECO Consolidated |  |  |  |  |
Land | 51,883 | 51,568 |  |  |
Plant and equipment | 5,701,875 | 5,364,400 |  |  |
Less accumulated depreciation | (2,111,229) | (2,040,789) |  |  |
Construction in progress | 143,233 | 151,378 |  |  |
Net utility plant | 3,785,762 | 3,526,557 |  |  |
Cash and cash equivalents | 62,825 | 17,159 | 48,806 | 122,936 |
Customer accounts receivable, net | 175,448 | 210,779 |  |  |
Accrued unbilled revenues, net | 144,124 | 134,298 |  |  |
Other accounts receivable, net | 14,062 | 28,176 |  |  |
Fuel oil stock, at average cost | 134,087 | 161,419 |  |  |
Materials and supplies, at average cost | 59,044 | 51,085 |  |  |
Prepayments and other | 52,857 | 32,865 |  |  |
Regulatory assets | 69,738 | 51,267 |  |  |
Total current assets | 712,185 | 687,048 |  |  |
Regulatory assets | 506,186 | 813,329 |  |  |
Unamortized debt expense | 9,003 | 10,554 |  |  |
Other | 73,993 | 71,305 |  |  |
Total other long-term assets | 589,182 | 895,188 |  |  |
Total assets | 5,087,129 | 5,108,793 |  |  |
Common stock equity | 1,593,564 | 1,472,136 |  |  |
Cumulative preferred stock-not subject to mandatory redemption | 34,293 | 34,293 |  |  |
Long-term debt, net | 1,206,545 | 1,147,872 |  |  |
Total capitalization | 2,834,402 | 2,654,301 |  |  |
Current portion of long-term debt | 11,400 | 0 |  |  |
Accounts payable | 189,559 | 186,824 |  |  |
Interest and dividends payable | 21,652 | 21,092 |  |  |
Taxes accrued | 249,445 | 251,066 |  |  |
Regulatory liabilities | 1,916 | 1,212 |  |  |
Other | 63,881 | 60,801 |  |  |
Total current liabilities | 537,853 | 520,995 |  |  |
Deferred income taxes | 507,161 | 417,611 |  |  |
Regulatory liabilities | 347,383 | 322,940 |  |  |
Unamortized tax credits | 73,539 | 66,584 |  |  |
Defined benefit pension and other postretirement benefit plans liability | 262,162 | 620,205 |  |  |
Other | 91,735 | 100,637 |  |  |
Total deferred credits and other liabilities | 1,281,980 | 1,527,977 |  |  |
Contributions in aid of construction | 432,894 | 405,520 |  |  |
Total liabilities and shareholders' equity | 5,087,129 | 5,108,793 |  |  |
RHI |  |  |  |  |
Cash and cash equivalents | 101 | 104 | 108 | 94 |
Total current assets | 101 | 104 |  |  |
Total assets | 101 | 104 |  |  |
Common stock equity | 101 | 104 |  |  |
Total capitalization | 101 | 104 |  |  |
Other |  | 0 |  |  |
Total current liabilities |  | 0 |  |  |
Total liabilities and shareholders' equity | $ 101 | $ 104 |  |  |

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X
- Definition The amount due for services rendered or products shipped, but not yet billed, recognized in conformity with revenue recognition criteria. This element is distinct from unbilled contracts receivables because this is based on noncontract transactions. + References No definition available. + Details
Name: | us-gaap_UnbilledReceivablesCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant