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Fair value measurements Fair Value Hierarchy of Financial Instruments (Details) - USD ($) $ in Thousands | Dec. 31, 2014 | Dec. 31, 2013
--- | --- | ---
Financial assets |  |
Available-for-sale investment securities | $ 550,394 | $ 529,007
Financial liabilities |  |
Short-term borrowings-other than bank | 118,972 | 105,482
Other bank borrowings | 290,656 | 244,514
Carrying or notional amount |  |
Financial assets |  |
Money market funds | 10 | 10
Available-for-sale investment securities | 550,394 | 529,007
Stock in Federal Home Loan Bank of Seattle | 69,302 | 92,546
Loans receivable, net | 4,397,457 | 4,115,415
Derivative assets | 30,120 | 46,356
Financial liabilities |  |
Deposit liabilities | 4,623,415 | 4,372,477
Short-term borrowings-other than bank | 118,972 | 105,482
Other bank borrowings | 290,656 | 244,514
Long-term debt, net-other than bank | 1,506,546 | 1,492,945
Derivative liabilities | 32,043 | 4,732
Estimated fair value |  |
Financial assets |  |
Money market funds | 10 | 10
Available-for-sale investment securities | 550,394 | 529,007
Stock in Federal Home Loan Bank of Seattle | 69,302 | 92,546
Loans receivable, net | 4,578,822 | 4,211,290
Derivative assets | 398 | 629
Financial liabilities |  |
Deposit liabilities | 4,623,773 | 4,374,377
Short-term borrowings-other than bank | 118,972 | 105,482
Other bank borrowings | 298,837 | 256,029
Long-term debt, net-other than bank | 1,622,736 | 1,508,425
Derivative liabilities | 114 | 26
Estimated fair value | Level 1 |  |
Financial assets |  |
Derivative assets |  | 98
Financial liabilities |  |
Derivative liabilities | 71 |
Estimated fair value | Level 2 |  |
Financial assets |  |
Money market funds | 10 | 10
Available-for-sale investment securities | 550,394 | 529,007
Stock in Federal Home Loan Bank of Seattle | 69,302 | 92,546
Derivative assets | 398 | 531
Financial liabilities |  |
Deposit liabilities | 4,623,773 | 4,374,377
Short-term borrowings-other than bank | 118,972 | 105,482
Other bank borrowings | 298,837 | 256,029
Long-term debt, net-other than bank | 1,622,736 | 1,508,425
Derivative liabilities | 43 | 26
Estimated fair value | Level 3 |  |
Financial assets |  |
Loans receivable, net | 4,578,822 | 4,211,290
Hawaiian Electric Company, Inc. and Subsidiaries | Carrying or notional amount |  |
Financial liabilities |  |
Long-term debt, net-other than bank | 1,206,546 | 1,217,945
Hawaiian Electric Company, Inc. and Subsidiaries | Estimated fair value |  |
Financial liabilities |  |
Long-term debt, net-other than bank | 1,313,893 | 1,228,966
Hawaiian Electric Company, Inc. and Subsidiaries | Estimated fair value | Level 2 |  |
Financial liabilities |  |
Long-term debt, net-other than bank | $ 1,313,893 | $ 1,228,966

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- Definition Fair value portion of deposit liabilities held by the entity, including, but not limited to, foreign and domestic, interest and noninterest bearing, demand deposits, saving deposits, negotiable orders of withdrawal (NOW) and time deposits. + References No definition available. + Details
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- Definition Fair value portion of investments in Federal Home Loan Bank (FHLBank) stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 325 -SubTopic 20 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=29638263&loc=d3e39828-111592 + Details
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- Definition Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Glossary Loan -URI http://asc.fasb.org/extlink&oid=6517073 + Details
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- Definition Investment in short-term money-market instruments (such as commercial paper, banker's acceptances, repurchase agreements, government securities, certificates of deposit, and so forth) which are highly liquid (that is, readily convertible to known amounts of cash) and so near their maturity that they present an insignificant risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify as cash equivalents by definition. Original maturity means an original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Equivalents -URI http://asc.fasb.org/extlink&oid=6507016 + Details
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