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Fair value measurements (Tables) | 3 Months Ended
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Mar. 31, 2018
Fair Value Disclosures [Abstract] |
Schedule of estimated fair values of certain of the Company's financial instruments | The following table presents the carrying or notional amount, fair value and placement in the fair value hierarchy of the Company’s financial instruments. For stock in Federal Home Loan Bank, the carrying amount is a reasonable estimate of fair value because it can only be redeemed at par. For financial liabilities such as noninterest-bearing demand, interest-bearing demand, and savings and money market deposits, the carrying amount is a reasonable estimate of fair value as these liabilities have no stated maturity.
|  |  |  | Estimated fair value
|  | Carrying or notional amount |  | Quoted prices in active markets for identical assets |  | Significant other observable inputs |  | Significant unobservable inputs |  |
(in thousands) |  |  | (Level 1) |  | (Level 2) |  | (Level 3) |  | Total
March 31, 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financial assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
HEI consolidated |  |  |  |  |  |  |  |  |  |
Available-for-sale investment securities |  | $ | 1,418,490 |  |  | $ | — |  |  | $ | 1,403,063 |  |  | $ | 15,427 |  |  | $ | 1,418,490 |
Held-to-maturity investment securities |  | 43,450 |  |  | — |  |  | 42,491 |  |  | — |  |  | 42,491 |
Stock in Federal Home Loan Bank |  | 10,158 |  |  | — |  |  | 10,158 |  |  | — |  |  | 10,158 |
Loans, net |  | 4,695,508 |  |  | — |  |  | 7,380 |  |  | 4,772,870 |  |  | 4,780,250 |
Mortgage servicing rights |  | 8,541 |  |  | — |  |  | — |  |  | 12,882 |  |  | 12,882 |
Derivative assets |  | 29,840 |  |  | — |  |  | 611 |  |  | — |  |  | 611 |
Hawaiian Electric consolidated |  |  |  |  |  |  |  |  |  |
Derivative assets-window forward contracts |  | 3,240 |  |  | — |  |  | 329 |  |  | — |  |  | 329 |
Financial liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |
HEI consolidated |  |  |  |  |  |  |  |  |  |
Deposit liabilities 1 |  | 777,390 |  |  | — |  |  | 766,425 |  |  | — |  |  | 766,425 |
Short-term borrowings—other than bank |  | 238,445 |  |  | — |  |  | 238,445 |  |  | — |  |  | 238,445 |
Other bank borrowings |  | 100,430 |  |  | — |  |  | 100,377 |  |  | — |  |  | 100,377 |
Long-term debt, net—other than bank |  | 1,684,002 |  |  | — |  |  | 1,741,324 |  |  | — |  |  | 1,741,324 |
Derivative liabilities |  | 24,985 |  |  | 60 |  |  | 27 |  |  | — |  |  | 87 |
Hawaiian Electric consolidated |  |  |  |  |  |  |  |  |  |
Short-term borrowings |  | 121,983 |  |  | — |  |  | 121,983 |  |  | — |  |  | 121,983 |
Long-term debt, net |  | 1,368,627 |  |  | — |  |  | 1,432,134 |  |  | — |  |  | 1,432,134 |
December 31, 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financial assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
HEI consolidated |  |  |  |  |  |  |  |  |  |
Available-for-sale investment securities |  | 1,401,198 |  |  | — |  |  | 1,385,771 |  |  | 15,427 |  |  | 1,401,198 |
Held-to-maturity investment securities |  | 44,515 |  |  | — |  |  | 44,412 |  |  | — |  |  | 44,412 |
Stock in Federal Home Loan Bank |  | 9,706 |  |  | — |  |  | 9,706 |  |  | — |  |  | 9,706 |
Loans, net |  | 4,628,381 |  |  | — |  |  | 11,254 |  |  | 4,770,497 |  |  | 4,781,751 |
Mortgage servicing rights |  | 8,639 |  |  | — |  |  | — |  |  | 12,052 |  |  | 12,052 |
Derivative assets |  | 17,812 |  |  | — |  |  | 393 |  |  | — |  |  | 393 |
Hawaiian Electric consolidated |  |  |  |  |  |  |  |  |  |
Derivative assets-window forward contracts |  | 3,240 |  |  | — |  |  | 256 |  |  | — |  |  | 256 |
Financial liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |
HEI consolidated |  |  |  |  |  |  |  |  |  |
Deposit liabilities 1 |  | 5,890,597 |  |  | — |  |  | 5,884,071 |  |  | — |  |  | 5,884,071 |
Short-term borrowings—other than bank |  | 117,945 |  |  | — |  |  | 117,945 |  |  | — |  |  | 117,945 |
Other bank borrowings |  | 190,859 |  |  | — |  |  | 190,829 |  |  | — |  |  | 190,829 |
Long-term debt, net—other than bank |  | 1,683,797 |  |  | — |  |  | 1,813,295 |  |  | — |  |  | 1,813,295 |
Derivative liabilities |  | 13,562 |  |  | 20 |  |  | 10 |  |  | — |  |  | 30 |
Hawaiian Electric consolidated |  |  |  |  |  |  |  |  |  |
Short-term borrowings |  | 4,999 |  |  | — |  |  | 4,999 |  |  | — |  |  | 4,999 |
Long-term debt, net |  | 1,368,479 |  |  | — |  |  | 1,497,079 |  |  | — |  |  | 1,497,079 |
1 Deposit liabilities as of December 31, 2017 include noninterest-bearing demand, interest-bearing demand, and savings and money market deposits, for which the carrying amount represents a reasonable estimate of fair value, as such liabilities have no stated maturity. The fair value of such financial liabilities are not included as of March 31, 2018 as a result of the Company’s adoption of ASU No. 2016-01.
Schedule of assets measured at fair value on a recurring basis | Assets and liabilities measured at fair value on a recurring basis were as follows:
|  | March 31, 2018 |  | December 31, 2017
|  | Fair value measurements using |  | Fair value measurements using
(in thousands) |  | Level 1 |  | Level 2 |  | Level 3 |  | Level 1 |  | Level 2 |  | Level 3
Available-for-sale investment securities (bank segment) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage-related securities-FNMA, FHLMC and GNMA |  | $ | — |  |  | $ | 1,224,235 |  |  | $ | — |  |  | $ | — |  |  | $ | 1,201,473 |  |  | $ | — |
U.S. Treasury and federal agency obligations |  | — |  |  | 178,828 |  |  | — |  |  | — |  |  | 184,298 |  |  | — |
Mortgage revenue bond |  | — |  |  | — |  |  | 15,427 |  |  | — |  |  | — |  |  | 15,427 |
|  | $ | — |  |  | $ | 1,403,063 |  |  | $ | 15,427 |  |  | $ | — |  |  | $ | 1,385,771 |  |  | $ | 15,427 |
Derivative assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate lock commitments (bank segment) 1 |  | $ | — |  |  | $ | 264 |  |  | $ | — |  |  | $ | — |  |  | $ | 133 |  |  | $ | — |
Forward commitments (bank segment) 1 |  | — |  |  | 18 |  |  | — |  |  | — |  |  | 4 |  |  | — |
Window forward contracts (electric utility segment)2 |  | — |  |  | 329 |  |  | — |  |  | — |  |  | 256 |  |  | — |
|  | $ | — |  |  | $ | 611 |  |  | $ | — |  |  | $ | — |  |  | $ | 393 |  |  | $ | — |
Derivative liabilities |  |  |  |  |  |  |  |  |  |  |  |
Interest rate lock commitments (bank segment) 1 |  | $ | — |  |  | $ | 9 |  |  | $ | — |  |  | $ | — |  |  | $ | 2 |  |  | $ | — |
Forward commitments (bank segment) 1 |  | 60 |  |  | 18 |  |  | — |  |  | 20 |  |  | 8 |  |  | — |
|  | $ | 60 |  |  | $ | 27 |  |  | $ | — |  |  | $ | 20 |  |  | $ | 10 |  |  | $ | — |
1 Derivatives are carried at fair value with changes in value reflected in the balance sheet in other assets or other liabilities and included in mortgage banking income. 2 Derivatives are included in regulatory assets and/or liabilities in the balance sheets.
Schedule of changes in Level 3 assets and liabilities measured at fair value on a recurring basis | The changes in Level 3 assets and liabilities measured at fair value on a recurring basis were as follows:
|  | Three months ended March 31
Mortgage revenue bond |  | 2018 | 2017
(in thousands) |  |  |
Beginning balance |  | $ | 15,427 |  | $ | 15,427 |
Principal payments received |  | — |  | — |
Purchases |  | — |  | — |
Unrealized gain (loss) included in other comprehensive income |  | — |  | — |
Ending balance |  | $ | 15,427 |  | $ | 15,427 |
Schedule of assets measured at fair value on a nonrecurring basis | The carrying value of assets measured at fair value on a nonrecurring basis were as follows:
|  |  |  | Fair value measurements
(in thousands) |  | Balance |  | Level 1 |  | Level 2 |  | Level 3
March 31, 2018 |  |  |  |  |  |  |  |
Loans |  | $ | 545 |  |  | $ | — |  |  | $ | — |  |  | $ | 545 |
December 31, 2017 |  |  |  |  |  |  |  |
Loans |  | 2,621 |  |  | — |  |  | — |  |  | 2,621 |
Schedule of significant unobservable inputs used in the fair value measurement | Key assumptions used in estimating the fair value of ASB’s mortgage servicing rights used in the impairment analysis were as follows:
(dollars in thousands) |  | March 31, 2018 |  |  | December 31, 2017 |
Unpaid principal balance |  | $ | 1,184,160 |  |  | $ | 1,195,454 |
Weighted average note rate |  | 3.94 | % |  | 3.94 | %
Weighted average discount rate |  | 10.0 | % |  | 10.0 | %
Weighted average prepayment speed |  | 7.1 | % |  | 9.0 | %
The following table presents quantitative information about Level 3 fair value measurements for financial instruments measured at fair value on a nonrecurring basis:
|  |  |  |  |  |  |  | Significant unobservable input value (1)
($ in thousands) |  | Fair value |  | Valuation technique |  | Significant unobservable input |  | Range |  | Weighted Average
March 31, 2018 |  |  |  |  |  |  |  |  |  |
Residential loans |  | $ | 545 |  |  | Fair value of collateral |  | Appraised value less 7% selling cost |  | 69-95% |  | 84%
Total loans |  | $ | 545 |  |  |  |  |  |  |  |  |
December 31, 2017 |  |  |  |  |  |  |  |  |  |
Residential loans |  | $ | 613 |  |  | Fair value of collateral |  | Appraised value less 7% selling cost |  | 71-92% |  | 84%
Commercial loans |  | 2,008 |  |  | Fair value of collateral |  | Appraised value |  | 71-76% |  | 75%
Total loans |  | $ | 2,621 |  |  |  |  |  |  |  |  |
(1) Represent percent of outstanding principal balance.

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- Definition Tabular disclosure of assets and liabilities by class, including financial instruments measured at fair value that are classified in shareholders' equity, if any, that are measured at fair value on a nonrecurring basis in periods after initial recognition (for example, impaired assets). Disclosures may include, but are not limited to: (a) the fair value measurements recorded and the reasons for the measurements and (b) the level within the fair value hierarchy in which the fair value measurements are categorized in their entirety (levels 1, 2, 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19190-110258 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of the fair value measurement of assets using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income (loss), and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19279-110258 + Details
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- Definition Tabular disclosure of the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13476-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13467-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6447952&loc=d3e13220-108610 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14172-108612 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13433-108611 + Details
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- Definition Tabular disclosure of quantitative information about the inputs used in the fair value measurement of assets. This disclosure may include, but is not limited to, the fair value of the asset, valuation technique used to measure fair value, the inputs used to measure fair value, the ranges of the inputs, and the weighted averages of the inputs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19190-110258 + Details
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