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Consolidating financial information (Details) - HECO (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2012 | Jun. 30, 2011 | Jun. 30, 2012 | Jun. 30, 2011
Other income |  |  |  |
Allowance for equity funds used during construction | $ 1,997 | $ 1,317 | $ 3,937 | $ 2,561
Interest and other charges |  |  |  |
Allowance for borrowed funds used during construction | (893) | (553) | (1,763) | (1,073)
Net income | 39,273 | 27,612 | 78,062 | 56,547
Preferred stock dividends of subsidiaries | 473 | 473 | 946 | 946
Net income for common stock | 38,800 | 27,139 | 77,116 | 55,601
HECO |  |  |  |
Operating revenues | 567,527 | 510,653 | 1,098,140 | 960,477
Operating expenses |  |  |  |
Fuel oil | 241,393 | 220,231 | 476,419 | 403,497
Purchased power | 141,136 | 131,921 | 265,916 | 244,672
Other operation | 44,621 | 48,396 | 84,569 | 95,651
Maintenance | 20,542 | 22,077 | 41,378 | 43,269
Depreciation | 22,737 | 22,885 | 45,308 | 45,768
Taxes, other than income taxes | 55,440 | 47,108 | 105,993 | 88,997
Income taxes | 13,361 | 3,640 | 25,324 | 8,338
Total operating expenses | 539,230 | 496,258 | 1,044,907 | 930,192
Operating income | 28,297 | 14,395 | 53,233 | 30,285
Other income |  |  |  |
Allowance for equity funds used during construction | 1,654 | 974 | 3,235 | 1,934
Equity in earnings of subsidiaries | 8,250 | 10,963 | 16,740 | 22,453
Other, net | 1,137 | 626 | 2,201 | 1,358
Total other income | 11,041 | 12,563 | 22,176 | 25,745
Interest and other charges |  |  |  |
Interest on long-term debt | 10,190 | 9,131 | 19,320 | 18,261
Amortization of net bond premium and expense | 429 | 503 | 912 | 1,016
Other interest charges (credits) | (167) | 442 | (554) | 820
Allowance for borrowed funds used during construction | (760) | (412) | (1,485) | (820)
Total interest and other charges | 9,692 | 9,664 | 18,193 | 19,277
Net income | 29,646 | 17,294 | 57,216 | 36,753
Net income attributable to HECO | 29,646 | 17,294 | 57,216 | 36,753
Preferred stock dividends of HECO | 270 | 270 | 540 | 540
Net income for common stock | 29,376 | 17,024 | 56,676 | 36,213
HELCO |  |  |  |
Operating revenues | 111,741 | 110,595 | 224,068 | 210,230
Operating expenses |  |  |  |
Fuel oil | 30,616 | 32,123 | 63,026 | 58,614
Purchased power | 37,395 | 32,242 | 71,303 | 62,264
Other operation | 9,948 | 9,524 | 18,963 | 17,792
Maintenance | 4,885 | 4,297 | 9,134 | 8,148
Depreciation | 8,301 | 8,148 | 16,737 | 16,471
Taxes, other than income taxes | 10,423 | 10,163 | 20,886 | 19,336
Income taxes | 2,831 | 4,725 | 7,054 | 8,494
Total operating expenses | 104,399 | 101,222 | 207,103 | 191,119
Operating income | 7,342 | 9,373 | 16,965 | 19,111
Other income |  |  |  |
Allowance for equity funds used during construction | 160 | 233 | 285 | 316
Other, net | 99 | 214 | 200 | 320
Total other income | 259 | 447 | 485 | 636
Interest and other charges |  |  |  |
Interest on long-term debt | 2,913 | 2,984 | 5,898 | 5,969
Amortization of net bond premium and expense | 108 | 137 | 245 | 280
Other interest charges (credits) | 20 | 93 | 53 | 174
Allowance for borrowed funds used during construction | (64) | (102) | (115) | (135)
Total interest and other charges | 2,977 | 3,112 | 6,081 | 6,288
Net income | 4,624 | 6,708 | 11,369 | 13,459
Preferred stock dividends of subsidiaries | 133 | 133 | 267 | 267
Net income attributable to HECO | 4,491 | 6,575 | 11,102 | 13,192
Net income for common stock | 4,491 | 6,575 | 11,102 | 13,192
MECO |  |  |  |
Operating revenues | 108,417 | 106,404 | 213,415 | 201,246
Operating expenses |  |  |  |
Fuel oil | 59,055 | 59,787 | 119,458 | 110,890
Purchased power | 9,821 | 7,574 | 15,922 | 12,759
Other operation | 9,947 | 9,468 | 22,833 | 19,476
Maintenance | 5,808 | 4,902 | 10,761 | 9,055
Depreciation | 5,095 | 5,225 | 10,570 | 10,451
Taxes, other than income taxes | 10,441 | 9,881 | 20,420 | 18,814
Income taxes | 2,382 | 2,795 | 3,561 | 5,938
Total operating expenses | 102,549 | 99,632 | 203,525 | 187,383
Operating income | 5,868 | 6,772 | 9,890 | 13,863
Other income |  |  |  |
Allowance for equity funds used during construction | 183 | 110 | 417 | 311
Other, net | 146 | 62 | 257 | 154
Total other income | 329 | 172 | 674 | 465
Interest and other charges |  |  |  |
Interest on long-term debt | 2,220 | 2,268 | 4,488 | 4,536
Amortization of net bond premium and expense | 124 | 126 | 249 | 253
Other interest charges (credits) | 66 | 104 | 159 | 199
Allowance for borrowed funds used during construction | (69) | (39) | (163) | (118)
Total interest and other charges | 2,341 | 2,459 | 4,733 | 4,870
Net income | 3,856 | 4,485 | 5,831 | 9,458
Preferred stock dividends of subsidiaries | 96 | 96 | 191 | 191
Net income attributable to HECO | 3,760 | 4,389 | 5,640 | 9,267
Net income for common stock | 3,760 | 4,389 | 5,640 | 9,267
RHI |  |  |  |
Other income |  |  |  |
Other, net |  |  | (1) | (2)
Total other income |  |  | (1) | (2)
Interest and other charges |  |  |  |
Net income |  |  | (1) | (2)
Net income attributable to HECO |  |  | (1) | (2)
Net income for common stock |  |  | (1) | (2)
UBC |  |  |  |
Other income |  |  |  |
Other, net | (1) | (1) | (1) | (4)
Total other income | (1) | (1) | (1) | (4)
Interest and other charges |  |  |  |
Net income | (1) | (1) | (1) | (4)
Net income attributable to HECO | (1) | (1) | (1) | (4)
Net income for common stock | (1) | (1) | (1) | (4)
Reclassifications and eliminations |  |  |  |
Other income |  |  |  |
Equity in earnings of subsidiaries | (8,250) | (10,963) | (16,740) | (22,453)
Other, net | (18) | (3) | (28) | (18)
Total other income | (8,268) | (10,966) | (16,768) | (22,471)
Interest and other charges |  |  |  |
Other interest charges (credits) | (18) | (3) | (28) | (18)
Total interest and other charges | (18) | (3) | (28) | (18)
Net income | (8,250) | (10,963) | (16,740) | (22,453)
Net income attributable to HECO | (8,250) | (10,963) | (16,740) | (22,453)
Net income for common stock | (8,250) | (10,963) | (16,740) | (22,453)
HECO Consolidated |  |  |  |
Operating revenues | 787,685 | 727,652 | 1,535,623 | 1,371,953
Operating expenses |  |  |  |
Fuel oil | 331,064 | 312,141 | 658,903 | 573,001
Purchased power | 188,352 | 171,737 | 353,141 | 319,695
Other operation | 64,516 | 67,388 | 126,365 | 132,919
Maintenance | 31,235 | 31,276 | 61,273 | 60,472
Depreciation | 36,133 | 36,258 | 72,615 | 72,690
Taxes, other than income taxes | 76,304 | 67,152 | 147,299 | 127,147
Income taxes | 18,574 | 11,160 | 35,939 | 22,770
Total operating expenses | 746,178 | 697,112 | 1,455,535 | 1,308,694
Operating income | 41,507 | 30,540 | 80,088 | 63,259
Other income |  |  |  |
Allowance for equity funds used during construction | 1,997 | 1,317 | 3,937 | 2,561
Other, net | 1,363 | 898 | 2,628 | 1,808
Total other income | 3,360 | 2,215 | 6,565 | 4,369
Interest and other charges |  |  |  |
Interest on long-term debt | 15,323 | 14,383 | 29,706 | 28,766
Amortization of net bond premium and expense | 661 | 766 | 1,406 | 1,549
Other interest charges (credits) | (99) | 636 | (370) | 1,175
Allowance for borrowed funds used during construction | (893) | (553) | (1,763) | (1,073)
Total interest and other charges | 14,992 | 15,232 | 28,979 | 30,417
Net income | 29,875 | 17,523 | 57,674 | 37,211
Preferred stock dividends of subsidiaries | 229 | 229 | 458 | 458
Net income attributable to HECO | 29,646 | 17,294 | 57,216 | 36,753
Preferred stock dividends of HECO | 270 | 270 | 540 | 540
Net income for common stock | $ 29,376 | $ 17,024 | $ 56,676 | $ 36,213

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- Definition The component of the allowance for funds used during construction during the period based on an assumed rate of return on equity funds used in financing the construction of regulated assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 71 -Paragraph 15 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 835 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6501569&loc=d3e55921-110430 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 835 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6501662&loc=d3e56162-110433 + Details
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- Definition The component of the allowance for funds used during construction during the period comprised of interest on borrowed funds used in financing the construction of regulated assets, which may be reflected as a reduction of interest expense. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 71 -Paragraph 15 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 835 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6501569&loc=d3e55921-110430 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 835 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6501662&loc=d3e56162-110433 + Details
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- Definition The amount of regulated power revenues recognized during the period. + References No definition available. + Details
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- Definition Discloses the amount of operating expense for the period related to depreciation and amortization. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2(b)) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 + Details
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- Definition The amount of fuel used charged against earnings for the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2(b)) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 + Details
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- Definition Discloses the amount of operating expense for the period for routine plant maintenance and repairs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2(b)) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 + Details
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- Definition Discloses the amount of other operating expenses (not elsewhere classified) for the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2(b)) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 + Details
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- Definition The amount of purchased power charged against earnings for the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2(b)) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 + Details
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