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Electric utility subsidiary - Unconsolidated variable interest entities (Details) (USD $) | 1 Months Ended | 3 Months Ended |
--- | --- | --- | ---
Mar. 31, 2004 security | Mar. 31, 2014 | Mar. 31, 2013 | Dec. 31, 2013
Power purchase agreement |  |  |  |
Purchases from IPPs |  | $ 165,000,000 | $ 153,000,000 |
Accounts payable |  | 210,511,000 |  | 212,331,000
Hawaiian Electric Company |  |  |  |
Power purchase agreement |  |  |  |
Number of power purchase agreements (PPAs) |  | 6 |  |
Maximum capacity of small power production facilities (in kilowatts) |  | 100 |  |
Number of entities currently not required to be consolidated as VIEs |  | 0 |  |
Percentage of power purchase from AES Hawaii, Inc. (AES Hawaii), Kalaeloa Partners, L.P. (Kalaeloa), Hamakua Energy Partners, L.P. (HEP) and HPOWER |  | 90.00% |  |
Variable Interest Entity, Unavailability of Information, Number of Entities |  | 3 |  |
Purchases from IPPs |  | 123,969,000 | 111,155,000 |
Number of firm capacity producers declining to provide financial information to determine primary beneficiary status |  | 2 |  |
Minimum potential number of IPP entities consolidated into company in the future |  | 1 |  |
Hawaiian Electric Company | AES Hawaii, Inc. (AES Hawaii) |  |  |  |
Power purchase agreement |  |  |  |
Purchases from IPPs |  | 33,000,000 | 23,000,000 |
Hawaiian Electric Company | Kalaeloa Partners, L.P. (Kalaeloa) |  |  |  |
Power purchase agreement |  |  |  |
Purchases from IPPs |  | 67,000,000 | 65,000,000 |
Power purchase capacity that Increases from initial capacity (in megawatts) |  | 180 |  |
Number of years entity entered under power purchase agreement |  | 25 years |  |
Power purchase capacity that Increases from initial capacity (in megawatts) |  | 208 |  |
Accounts payable |  | 23,000,000 |  |
Hawaiian Electric Company | Hamakua Energy Partners, L.P. (HEP) |  |  |  |
Power purchase agreement |  |  |  |
Purchases from IPPs |  | 12,000,000 | 12,000,000 |
Hawaiian Electric Company | HPOWER |  |  |  |
Power purchase agreement |  |  |  |
Purchases from IPPs |  | 16,000,000 | 15,000,000 |
Hawaiian Electric Company | Other IPPs |  |  |  |
Power purchase agreement |  |  |  |
Purchases from IPPs |  | 37,000,000 | 38,000,000 |
Hawaii Electric Light Company, Inc. (HELCO) |  |  |  |
Power purchase agreement |  |  |  |
Purchases from IPPs |  | 29,491,000 | 30,122,000 |
Maui Electric Company (MECO) |  |  |  |
Power purchase agreement |  |  |  |
Purchases from IPPs |  | 11,456,000 | 12,087,000 |
HECO Capital Trust III |  |  |  |
Unconsolidated variable interest entities |  |  |  |
Investment in 2004 Debentures |  | 51,500,000 |  | 51,500,000
Interest income |  | 800,000 | 800,000 |
HECO Capital Trust III | Hawaiian Electric Company |  |  |  |
Unconsolidated variable interest entities |  |  |  |
Principal amount of 2004 Debentures | 31,500,000 |  |  |
HECO Capital Trust III | Hawaiian Electric Company | 2004 Trust Preferred Securities |  |  |  |
Unconsolidated variable interest entities |  |  |  |
Number of 2004 Trust Preferred Securities issued | 2,000,000 |  |  |
Dividend rate on 2004 Trust Preferred Securities (as a percent) | 6.50% |  |  |
Aggregate Liquidation preference | 50,000,000 |  |  |
Balance of Trust Securities |  | 50,000,000 |  | 50,000,000
Dividend distributions on Trust Preferred Securities |  | 800,000 | 800,000 |
HECO Capital Trust III | Hawaiian Electric Company | Trust Common Securities |  |  |  |
Unconsolidated variable interest entities |  |  |  |
Aggregate Liquidation preference | 1,500,000 |  |  |
Balance of Trust Securities |  | 1,500,000 |  | 1,500,000
Common dividend |  | 25,000 | 25,000 |
HECO Capital Trust III | Hawaii Electric Light Company, Inc. (HELCO) |  |  |  |
Unconsolidated variable interest entities |  |  |  |
Principal amount of 2004 Debentures | 10,000,000 |  |  |
HECO Capital Trust III | Maui Electric Company (MECO) |  |  |  |
Unconsolidated variable interest entities |  |  |  |
Principal amount of 2004 Debentures | $ 10,000,000 |  |  |

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- Definition Represents the entity's increased aggregate capacity from initial capacity, utilized under power purchase agreements (PPAs). + References No definition available. + Details
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- Definition Preferred securities that embody an unconditional obligation requiring the issuer to redeem the securities by transferring the assets at a specified or determinable date (or dates) or upon an event that is certain to occur, that are issued by a trust to outside investors where the trust uses the proceeds of the issuance of those securities to purchase an equivalent amount of junior subordinated debentures or other loans having stated maturities. + References No definition available. + Details
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- Definition The minimum number of potential IPP's that could be required to be consolidation into the Company in the future based on new financial information provided by IIP's used to determine VIE relationship. + References No definition available. + Details
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- Definition The value of liquidation preference (or restrictions) of securities that has a preference in involuntary liquidation considerably in excess of the par or stated value of the shares. The liquidation preference is the difference between the preference in liquidation and the par or stated values of the share. + References No definition available. + Details
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- Definition Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.15(5)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.15(a)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 15 -Subparagraph a -Article 7 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 15 -Subparagraph 5 -Article 9 + Details
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- Definition Amount before accretion (amortization) of purchase discount (premium) of interest income on nonoperating securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.7(b)) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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- Definition Amount of operating expense for purchased power of regulated operation. + 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=26872669&loc=d3e20235-122688 + Details
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