Hawaiian Electric Company, Inc. PFD SER D 5% (HAWEM) 10-Q 10 May 18 2018 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2018	Apr. 27, 2018
Entity Information [Line Items]
Entity Registrant Name	HAWAIIAN ELECTRIC INDUSTRIES INC
Entity Central Index Key	354,707
Document Type	10-Q
Document Period End Date	Mar. 31, 2018
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		108,841,348
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q1
Hawaiian Electric Company, Inc. and Subsidiaries
Entity Information [Line Items]
Entity Registrant Name	HAWAIIAN ELECTRIC COMPANY INC
Entity Central Index Key	46,207
Document Type	10-Q
Document Period End Date	Mar. 31, 2018
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		16,142,216
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q1

Condensed Consolidated Statemen

Condensed Consolidated Statements of Income (unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenues
Total revenues	$ 645,874	$ 591,562
Expenses
Purchased power	140,000	127,000
Total expenses	573,985	521,824
Operating income (loss)
Total operating income	71,889	69,738
Retirement defined benefits expense—other than service costs	(1,833)	(1,876)
Interest expense, net—other than on deposit liabilities and other bank borrowings	(21,518)	(19,568)
Allowance for borrowed funds used during construction	1,444	889
Allowance for equity funds used during construction	3,294	2,399
Income before income taxes	53,276	51,582
Income taxes	12,556	16,916
Net income	40,720	34,666
Preferred stock dividends of subsidiaries	473	473
Net income for common stock	$ 40,247	$ 34,193
Basic earnings per common share (in dollars per share)	$ 0.37	$ 0.31
Diluted earnings per common share (in dollars per share)	0.37	0.31
Dividends declared per common share (in dollars per share)	$ 0.31	$ 0.31
Weighted-average number of common shares outstanding (in shares)	108,818	108,674
Net effect of potentially dilutive shares (in shares)	206	184
Weighted-average shares assuming dilution (in shares)	109,024	108,858
Hawaiian Electric Company, Inc. and Subsidiaries
Revenues
Total revenues	$ 570,427	$ 518,611
Expenses
Fuel oil	166,968	144,270
Purchased power	139,910	127,124
Other operation and maintenance	107,610	98,817
Depreciation	50,466	48,216
Taxes, other than income taxes	54,104	49,823
Total expenses	519,058	468,250
Operating income (loss)
Total operating income	51,369	50,361
Retirement defined benefits expense—other than service costs	(1,264)	(1,423)
Allowance for borrowed funds used during construction	1,444	889
Allowance for equity funds used during construction	3,294	2,399
Interest expense and other charges, net	(17,694)	(17,504)
Income before income taxes	37,149	34,722
Income taxes	9,175	12,758
Net income	27,974	21,964
Preferred stock dividends of subsidiaries	229	229
Net income attributable to Hawaiian Electric	27,745	21,735
Preferred stock dividends of Hawaiian Electric	270	270
Net income for common stock	27,475	21,465
Electric utility
Revenues
Total revenues	570,427	518,611
Expenses
Total expenses	519,058	468,250
Operating income (loss)
Total operating income	51,369	50,361
Income before income taxes	37,149	34,722
Income taxes	9,175	12,758
Net income	27,974	21,964
Preferred stock dividends of subsidiaries	499	499
Net income for common stock	27,475	21,465
Bank
Revenues
Total revenues	75,419	72,856
Expenses
Total expenses	50,532	48,501
Operating income (loss)
Total operating income	24,887	24,355
Income before income taxes	24,500	24,160
Income taxes	5,540	8,347
Net income	18,960	15,813
Preferred stock dividends of subsidiaries	0	0
Net income for common stock	18,960	15,813
Other
Revenues
Total revenues	28	95
Expenses
Total expenses	4,395	5,073
Operating income (loss)
Total operating income	(4,367)	(4,978)
Income before income taxes	(8,373)	(7,300)
Income taxes	(2,159)	(4,189)
Net income	(6,214)	(3,111)
Preferred stock dividends of subsidiaries	(26)	(26)
Net income for common stock	$ (6,188)	$ (3,085)

Condensed Consolidated Stateme3

Condensed Consolidated Statements of Comprehensive Income (unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Net income for common stock	$ 40,247	$ 34,193
Net unrealized gains (losses) on available-for-sale investment securities:
Net unrealized gain (losses) on available-for-sale investment securities arising during the period, net of taxes	(13,297)	223
Derivatives qualifying as cash flow hedges:
Reclassification adjustment to net income, net of tax benefits	0	454
Retirement benefit plans:
Adjustment for amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of tax benefits	5,146	3,921
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of taxes	(4,622)	(3,613)
Other comprehensive income (loss), net of taxes	(12,773)	985
Comprehensive income attributable to Hawaiian Electric Industries, Inc.	27,474	35,178
Hawaiian Electric Company, Inc. and Subsidiaries
Net income for common stock	27,475	21,465
Derivatives qualifying as cash flow hedges:
Reclassification adjustment to net income, net of tax benefits	0	454
Retirement benefit plans:
Adjustment for amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of tax benefits	4,653	3,618
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of taxes	(4,622)	(3,613)
Other comprehensive income (loss), net of taxes	31	459
Comprehensive income attributable to Hawaiian Electric Industries, Inc.	$ 27,506	$ 21,924

Condensed Consolidated Stateme4

Condensed Consolidated Statements of Comprehensive Income (unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement of Comprehensive Income [Abstract]
Net unrealized gains (losses) on securities arising during the period, taxes (benefits)	$ (4,867)	$ 148
Reclassification adjustment to net income, tax expense (benefits)	0	(289)
Amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, taxes (benefits)	(1,792)	(2,502)
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, taxes	1,603	2,301
Hawaiian Electric Company, Inc. and Subsidiaries
Reclassification adjustment to net income, tax expense (benefits)	0	(289)
Amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, taxes (benefits)	(1,614)	(2,304)
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, taxes	$ 1,603	$ 2,301

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (unaudited) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Assets
Cash and cash equivalents	$ 244,785	$ 261,881
Accounts receivable and unbilled revenues, net	266,336	263,209
Available-for-sale investment securities, at fair value	1,418,490	1,401,198
Held-to-maturity investment securities, at amortized cost	43,450	44,515
Stock in Federal Home Loan Bank, at cost	10,158	9,706
Loans held for investment, net	4,688,129	4,617,131
Loans held for sale, at lower of cost or fair value	7,379	11,250
Property, plant and equipment, net of accumulated depreciation	4,542,558	4,460,248
Regulatory assets	872,499	869,297
Other	526,744	513,535
Goodwill	82,190	82,190
Utility property, plant and equipment
Total property, plant and equipment, net	4,542,558	4,460,248
Current assets
Cash and cash equivalents	244,785	261,881
Other long-term assets
Total assets	12,702,718	12,534,160
Liabilities
Accounts payable	190,221	193,714
Interest and dividends payable	29,786	25,837
Deposit liabilities	6,079,067	5,890,597
Short-term borrowings—other than bank	238,445	117,945
Other bank borrowings	100,430	190,859
Long-term debt, net—other than bank	1,684,002	1,683,797
Deferred income taxes	381,478	388,430
Regulatory liabilities	895,093	880,770
Defined benefit pension and other postretirement benefit plans liability	502,304	509,514
Other	475,822	521,018
Total liabilities	10,576,648	10,402,481
Capitalization
Retained earnings	483,342	476,836
Accumulated other comprehensive loss, net of tax benefits	(54,714)	(41,941)
Total shareholders’ equity	2,091,777	2,097,386
Preferred stock, no par value, authorized 10,000,000 shares; issued: none	0	0
Preferred stock of subsidiaries - not subject to mandatory redemption	34,293	34,293
Commitments and contingencies
Current liabilities
Interest and dividends payable	29,786	25,837
Deferred credits and other liabilities
Deferred income taxes	381,478	388,430
Shareholders’ equity
Preferred stock, no par value, authorized 10,000,000 shares; issued: none	0	0
Common stock, no par value, authorized 200,000,000 shares; issued and outstanding: 108,841,157 shares and 108,787,807 shares at March 31, 2018 and December 31, 2017, respectively	1,663,149	1,662,491
Retained earnings	483,342	476,836
Accumulated other comprehensive loss, net of tax benefits	(54,714)	(41,941)
Total shareholders’ equity	2,091,777	2,097,386
Total liabilities and shareholders’ equity	12,702,718	12,534,160
Hawaiian Electric Company, Inc. and Subsidiaries
Assets
Cash and cash equivalents	23,399	12,517
Property, plant and equipment, net of accumulated depreciation	4,296,732	4,248,539
Utility property, plant and equipment
Land	52,940	53,177
Plant and equipment	6,452,215	6,401,040
Less accumulated depreciation	(2,507,942)	(2,476,352)
Construction in progress	291,937	263,094
Utility property, plant and equipment, net	4,289,150	4,240,959
Nonutility property, plant and equipment, less accumulated depreciation	7,582	7,580
Total property, plant and equipment, net	4,296,732	4,248,539
Current assets
Cash and cash equivalents	23,399	12,517
Customer accounts receivable, net	141,433	127,889
Accrued unbilled revenues, net	99,635	107,054
Other accounts receivable, net	3,953	7,163
Fuel oil stock, at average cost	88,723	86,873
Materials and supplies, at average cost	55,692	54,397
Prepayments and other	30,208	25,355
Regulatory assets	102,800	88,390
Total current assets	545,843	509,638
Other long-term assets
Regulatory assets	769,699	780,907
Other	98,295	91,529
Total other long-term assets	867,994	872,436
Total assets	5,710,569	5,630,613
Liabilities
Interest and dividends payable	26,204	22,575
Deferred income taxes	393,089	394,041
Capitalization
Common stock ($6 2/3 par value, authorized 50,000,000 shares; outstanding 16,142,216 shares at March 31, 2018 and December 31, 2017)	107,634	107,634
Premium on capital stock	614,667	614,675
Retained earnings	1,125,842	1,124,193
Accumulated other comprehensive loss, net of tax benefits	(1,188)	(1,219)
Total shareholders’ equity	1,846,955	1,845,283
Preferred stock, no par value, authorized 10,000,000 shares; issued: none	34,293	34,293
Long-term debt, net	1,318,654	1,318,516
Total capitalization	3,199,902	3,198,092
Commitments and contingencies
Current liabilities
Current portion of long-term debt	49,973	49,963
Short-term borrowings from non-affiliates	121,983	4,999
Accounts payable	142,399	159,610
Interest and dividends payable	26,204	22,575
Taxes accrued, including revenue taxes	166,465	199,101
Regulatory liabilities	6,933	3,401
Other	59,875	59,456
Total current liabilities	573,832	499,105
Deferred credits and other liabilities
Deferred income taxes	393,089	394,041
Regulatory liabilities	888,160	877,369
Unamortized tax credits	91,936	90,369
Defined benefit pension and other postretirement benefit plans liability	465,626	472,948
Other	98,024	98,689
Total deferred credits and other liabilities	1,936,835	1,933,416
Shareholders’ equity
Preferred stock, no par value, authorized 10,000,000 shares; issued: none	34,293	34,293
Retained earnings	1,125,842	1,124,193
Accumulated other comprehensive loss, net of tax benefits	(1,188)	(1,219)
Total shareholders’ equity	1,846,955	1,845,283
Total liabilities and shareholders’ equity	$ 5,710,569	$ 5,630,613

Condensed Consolidated Balance6

Condensed Consolidated Balance Sheets (unaudited) (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Property, plant and equipment, accumulated depreciation	$ 2,587,998	$ 2,553,295
Preferred stock, authorized shares (in shares)	10,000,000	10,000,000
Preferred stock, issued shares (in shares)	0	0
Common stock, authorized shares (in shares)	200,000,000	200,000,000
Common stock, issued shares (in shares)	108,841,157	108,787,807
Common stock, outstanding shares (in shares)	108,841,157	108,787,807
Hawaiian Electric Company, Inc. and Subsidiaries
Nonutility property, plant and equipment, accumulated depreciation	$ 1,252	$ 1,251
Common stock, par value (in dollars per share)	$ 6.67	$ 6.67
Common stock, authorized shares (in shares)	50,000,000	50,000,000
Common stock, outstanding shares (in shares)	16,142,216	16,142,216

Condensed Consolidated Stateme7

Condensed Consolidated Statements of Changes in Shareholders' Equity and Common Stock Equity (unaudited) - USD ($) $ in Thousands	Total	Hawaiian Electric Company, Inc. and Subsidiaries	Common stock	Common stockHawaiian Electric Company, Inc. and Subsidiaries	Premium on capital stockHawaiian Electric Company, Inc. and Subsidiaries	Retained Earnings	Retained EarningsHawaiian Electric Company, Inc. and Subsidiaries	Accumulated other comprehensive income (loss)	Accumulated other comprehensive income (loss)Hawaiian Electric Company, Inc. and Subsidiaries
Beginning Balance at Dec. 31, 2016	$ 2,066,753	$ 1,799,787	$ 1,660,910	$ 106,818	$ 601,491	$ 438,972	$ 1,091,800	$ (33,129)	$ (322)
Beginning Balance (in shares) at Dec. 31, 2016			108,583,000	16,020,000
Increase (decrease) in stockholders' equity
Net income for common stock	34,193	21,465				34,193	21,465
Other comprehensive income (loss), net of tax (benefits)	985	459						985	459
Issuance of common stock, net of expenses	(2,630)		$ (2,630)
Issuance of common stock, net of expenses (in shares)			162,000
Common stock dividends	(33,713)	(21,942)				(33,713)	(21,942)
Ending Balance at Mar. 31, 2017	2,065,588	1,799,769	$ 1,658,280	$ 106,818	601,491	439,452	1,091,323	(32,144)	137
Ending Balance (in shares) at Mar. 31, 2017			108,745,000	16,020,000
Beginning Balance at Dec. 31, 2017	$ 2,097,386	1,845,283	$ 1,662,491	$ 107,634	614,675	476,836	1,124,193	(41,941)	(1,219)
Beginning Balance (in shares) at Dec. 31, 2017	108,787,807		108,788,000	16,142,000
Increase (decrease) in stockholders' equity
Net income for common stock	$ 40,247	27,475				40,247	27,475
Other comprehensive income (loss), net of tax (benefits)	(12,773)	31						(12,773)	31
Issuance of common stock, net of expenses	658		$ 658
Issuance of common stock, net of expenses (in shares)			53,000
Common stock dividends	(33,741)	(25,826)				(33,741)	(25,826)
Common stock issuance expenses		(8)			(8)
Ending Balance at Mar. 31, 2018	$ 2,091,777	$ 1,846,955	$ 1,663,149	$ 107,634	$ 614,667	$ 483,342	$ 1,125,842	$ (54,714)	$ (1,188)
Ending Balance (in shares) at Mar. 31, 2018	108,841,157		108,841,000	16,142,000

Condensed Consolidated Stateme8

Condensed Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities
Net income	$ 40,720	$ 34,666
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of property, plant and equipment	53,091	50,051
Other amortization	8,745	2,372
Provision for loan losses	3,541	3,907
Loans originated and purchased, held for sale	(36,409)	(35,725)
Proceeds from sale of loans, held for sale	33,114	40,588
Deferred income taxes	(2,889)	10,096
Share-based compensation expense	1,657	1,056
Allowance for equity funds used during construction	(3,294)	(2,399)
Other	2,150	(347)
Changes in assets and liabilities
Increase in accounts receivable and unbilled revenues, net	(7,829)	(12,337)
Increase in fuel oil stock	(1,704)	(7,444)
Decrease (increase) in regulatory assets	(16,900)	5,909
Increase in accounts, interest and dividends payable	22,808	24,903
Change in prepaid and accrued income taxes, tax credits and utility revenue taxes	(29,842)	(42,175)
Increase (decrease) in defined benefit pension and other postretirement benefit plans liability	(390)	1,012
Change in other assets and liabilities	(31,892)	(27,142)
Net cash provided by operating activities	34,677	46,991
Cash flows from investing activities
Available-for-sale investment securities purchased	(88,403)	(171,878)
Principal repayments on available-for-sale investment securities	51,895	48,200
Principal repayment of held-to-maturity investment securities	1,032	0
Purchase of stock from Federal Home Loan Bank	(2,853)	(488)
Redemption of stock from Federal Home Loan Bank	2,400	0
Net decrease (increase) in loans held for investment	(75,006)	890
Proceeds from sale of commercial loans	7,149	13,493
Proceeds from sale of real estate acquired in settlement of loans	589	185
Capital expenditures	(133,352)	(91,242)
Contributions in aid of construction	4,330	10,650
Contributions to low income housing investments	(1,425)	0
Other	2,593	5,709
Net cash used in investing activities	(231,051)	(184,481)
Cash flows from financing activities
Net increase in deposit liabilities	86,095	126,161
Net increase in short-term borrowings with original maturities of three months or less	120,485	2,300
Net increase in retail repurchase agreements	11,946	21,071
Proceeds from other bank borrowings	60,000	0
Repayments of other bank borrowings	(60,000)	(13,534)
Withheld shares for employee taxes on vested share-based compensation	(991)	(3,687)
Common stock dividends	(33,741)	(33,713)
Preferred stock dividends of subsidiaries	(473)	(473)
Other	(4,043)	(4,857)
Net cash provided by financing activities	179,278	93,268
Net decrease in cash and cash equivalents	(17,096)	(44,222)
Cash and cash equivalents, beginning of period	261,881	278,452
Cash and cash equivalents, end of period	244,785	234,230
Hawaiian Electric Company, Inc. and Subsidiaries
Cash flows from operating activities
Net income	27,974	21,964
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of property, plant and equipment	50,466	48,216
Other amortization	5,344	1,949
Deferred income taxes	(1,580)	11,064
Allowance for equity funds used during construction	(3,294)	(2,399)
Other	2,681	436
Changes in assets and liabilities
Increase in accounts receivable	(15,037)	(7,328)
Decrease (increase) in accrued unbilled revenues	7,419	(5,939)
Increase in fuel oil stock	(1,850)	(7,444)
Increase in materials and supplies	(1,295)	(3,366)
Decrease (increase) in regulatory assets	(16,900)	5,909
Increase (decrease) in accounts payable	5,143	17,231
Change in prepaid and accrued income taxes, tax credits and utility revenue taxes	(32,866)	(43,984)
Increase (decrease) in defined benefit pension and other postretirement benefit plans liability	(938)	264
Change in other assets and liabilities	4,513	(4,694)
Net cash provided by operating activities	29,780	31,879
Cash flows from investing activities
Capital expenditures	(114,457)	(84,712)
Contributions in aid of construction	4,330	10,650
Other	603	2,702
Net cash used in investing activities	(109,524)	(71,360)
Cash flows from financing activities
Net increase in short-term borrowings with original maturities of three months or less	116,984	1,500
Common stock dividends	(25,826)	(21,942)
Preferred stock dividends of Hawaiian Electric and subsidiaries	(499)	(499)
Other	(33)	(657)
Net cash provided by financing activities	90,626	(21,598)
Net decrease in cash and cash equivalents	10,882	(61,079)
Cash and cash equivalents, beginning of period	12,517	74,286
Cash and cash equivalents, end of period	$ 23,399	$ 13,207

Basis of presentation

Basis of presentation	3 Months Ended
	Mar. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of presentation	Basis of presentation The accompanying unaudited condensed consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America (GAAP) for interim financial information, the instructions to SEC Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. In preparing the unaudited condensed consolidated financial statements, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the balance sheet and the reported amounts of revenues and expenses for the period. Actual results could differ significantly from those estimates. The accompanying unaudited condensed consolidated financial statements and the following notes should be read in conjunction with the audited consolidated financial statements and the notes thereto in HEI’s and Hawaiian Electric’s Form 10-K for the year ended December 31, 2017 . In the opinion of HEI’s and Hawaiian Electric’s management, the accompanying unaudited condensed consolidated financial statements contain all material adjustments required by GAAP to fairly state consolidated HEI’s and Hawaiian Electric’s financial positions as of March 31, 2018 and December 31, 2017 and the results of their operations and cash flows for the three months ended March 31, 2018 and 2017 . All such adjustments are of a normal recurring nature, unless otherwise disclosed below or in other referenced material. Results of operations for interim periods are not necessarily indicative of results for the full year. Recent accounting pronouncements. Revenues from contracts with customers . In May 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2014-09, “Revenue from Contracts with Customers (Topic 606).” The core principle of the guidance in ASU No. 2014-09 is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. ASU No. 2014-09 also requires disclosure of the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers. The Company and Hawaiian Electric adopted ASU No. 2014-09 (and subsequently issued revenue-related ASUs, as applicable) in the first quarter of 2018. There was no cumulative effect adjustment and no impact on the timing or pattern of revenue recognition, but ASU No. 2014-09 required changes with respect to the Company’s and Hawaiian Electric’s revenue disclosures. See Note 7 . Financial instruments . In January 2016, the FASB issued ASU No. 2016-01, “Financial Instruments-Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities,” which, among other things: • Requires equity investments (except those accounted for under the equity method of accounting, or those that result in consolidation of the investee) to be measured at fair value with changes in fair value recognized in net income. • Requires public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes. • Requires separate presentation of financial assets and financial liabilities by measurement category and form of financial asset (i.e., securities or loans and receivables). • Eliminates the requirement for public business entities to disclose the method(s) and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost. The Company adopted ASU No. 2016-01 in the first quarter of 2018 and the impact of adoption was not material to the Company’s and Hawaiian Electric’s consolidated financial statements. Cash flows . In August 2016, the FASB issued ASU No. 2016-15, “Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments,” which provides guidance on eight specific cash flow issues - debt prepayment or debt extinguishment costs, settlement of zero-coupon debt instruments or other debt instruments with coupon interest rates that are insignificant in relation to the effective interest rate of the borrowing, contingent consideration payments made after a business combination, proceeds from the settlement of insurance claims, proceeds from the settlement of corporate-owned life insurance policies (including bank-owned life insurance policies), distributions received from equity method investees, beneficial interests in securitization transactions, and separately identifiable cash flows and application of the predominance principle. The Company adopted ASU No. 2016-15 in the first quarter of 2018 using a retrospective transition method and there was no impact from the adoption to the Company’s and Hawaiian Electric’s consolidated statements of cash flows. Restricted cash . In November 2016, the FASB issued ASU No. 2016-18, “Statement of Cash Flows (Topic 230): Restricted Cash,” which requires that a statement of cash flows explain the change during the period in the total of cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. The Company adopted ASU No. 2016-18 in the first quarter of 2018 using a retrospective transition method and the impact of adoption was not material to the Company’s and Hawaiian Electric’s consolidated statements of cash flows. Definition of a Business . In January 2017, the FASB issued ASU No. 2017-01, “Business Combinations—Clarifying the Definition of a Business.” This update clarifies the definition of a business and adds guidance to assist entities with evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. The Company adopted ASU No. 2017-01 in the first quarter of 2018 and the impact of adoption was not material to the Company’s and Hawaiian Electric’s consolidated financial statements. Net periodic pension cost and net periodic postretirement benefit cost . In March 2017, the FASB issued ASU No. 2017-07, “Compensation-Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost,” which requires that an employer report the service cost component in the same line item or items as other compensation costs arising from services rendered by the pertinent employees during the period. It also requires the other components of net periodic pension cost (NPPC) and net periodic postretirement benefit cost (NPBC) as defined in paragraphs 715-30-35-4 and 715-60-35-9 to be presented in the income statement separately from the service cost component and outside a subtotal of income from operations. Additionally, only the service cost component is eligible for capitalization under GAAP, when applicable. The Company adopted ASU No. 2017-07 in the first quarter of 2018: (1) retrospectively for the presentation in the income statement of the service cost component and the other components of NPPC and NPBC, and (2) prospectively for the capitalization in assets of the service cost component of NPPC and NPBC for Hawaiian Electric and its subsidiaries. HEI and ASB do not capitalize pension and OPEB costs. In Settlement Agreements in the 2017 Hawaiian Electric and 2016 Hawaii Electric Light rate cases, Hawaiian Electric and Hawaii Electric Light, respectively, and the Consumer Advocate agreed to the deferral of the non-service cost components of NPPC and NPBC, which would have been capitalized prior to ASU No. 2017-07, as part of the pension tracking mechanism. In the Hawaiian Electric Interim D&O, the PUC did not identify this item for further review, and Hawaiian Electric will follow the Settlement Agreement. Hawaii Electric Light and Maui Electric will follow Hawaiian Electric’s treatment until rates are set in the next rate cases. The treatment under the Settlement Agreement will be followed beginning in 2018 until each utility’s next rate case. In each utility’s next rate case, rates established would include recovery of the deferred non-service cost components and seek to adopt the capitalization policy which reflects the requirements of ASU No. 2017-07 (i.e., only the service cost components of NPPC and NPBC will be capitalized). Thus, the adoption of ASU 2017-07 in the first quarter of 2018 does not have a net income impact. The following table summarizes the impact to the prior period financial statements of the adoption of ASU No. 2017-07: (in thousands) As previously filed Adjustment from adoption of ASU No. 2017-07 As currently reported Three months ended March 31, 2017 HEI Condensed Consolidated Income Statement Expenses Electric utility $ 469,673 $ (1,423 ) $ 468,250 Bank 48,696 (195 ) 48,501 Other 5,331 (258 ) 5,073 Total expenses 523,700 (1,876 ) 521,824 Operating income Electric utility 48,938 1,423 50,361 Bank 24,160 195 24,355 Other (5,236 ) 258 (4,978 ) Total operating income 67,862 1,876 69,738 Retirement defined benefits expense--other than service costs — (1,876 ) (1,876 ) Hawaiian Electric Condensed Consolidated Income Statement Other operation and maintenance 100,240 (1,423 ) 98,817 Total expense 469,673 (1,423 ) 468,250 Operating income 48,938 1,423 50,361 Retirement defined benefits expense--other than service costs — (1,423 ) (1,423 ) Hawaiian Electric Condensed Consolidating Income Statement (in Note 3) Hawaiian Electric (parent only) Other operation and maintenance 67,278 (1,285 ) 65,993 Total expense 333,188 (1,285 ) 331,903 Operating income 29,655 1,285 30,940 Retirement defined benefits expense--other than service costs — (1,285 ) (1,285 ) Hawaii Electric Light Other operation and maintenance 15,516 83 15,599 Total expense 68,497 83 68,580 Operating income 10,485 (83 ) 10,402 Retirement defined benefits expense--other than service costs — 83 83 Maui Electric Other operation and maintenance 17,446 (221 ) 17,225 Total expense 67,988 (221 ) 67,767 Operating income 8,805 221 9,026 Retirement defined benefits expense--other than service costs — (221 ) (221 ) ASB Statements of Income Data (in Note 4) Compensation and employee benefits 23,237 (195 ) 23,042 Other expense 4,311 195 4,506 Leases . In February 2016, the FASB issued ASU No. 2016-02, “Leases (Topic 842),” which requires that lessees recognize a liability to make lease payments (the lease liability) and a right-of-use asset, representing its right to use the underlying asset for the lease term, for all leases (except short-term leases) at the commencement date. For leases with a term of 12 months or less, a lessee is permitted to make an accounting policy election and recognize lease expense for such leases generally on a straight-line basis over the lease term. For finance leases, a lessee is required to recognize interest on the lease liability separately from amortization of the right-of-use asset in the statement of income. For operating leases, a lessee is required to recognize a single lease cost, calculated so that the cost of the lease is allocated over the lease term on a generally straight-line basis. The Company plans to adopt ASU No. 2016-02 in the first quarter of 2019 and is currently analyzing the potential impact of adoption, which includes an in-process assessment of all of its operating leases and other arrangements that may meet the definition of a lease under the standard. Credit losses . In June 2016, the FASB issued ASU No. 2016-13, “ Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments ,” which is intended to improve financial reporting by requiring timelier recording of credit losses on loans and other financial instruments held by financial institutions and other organizations . ASU No. 2016-13 requires the measurement of all expected credit losses for financial assets held at the reporting date (based on historical experience, current conditions and reasonable and supportable forecasts) and enhanced disclosures to help financial statement users better understand significant estimates and judgments used in estimating credit losses, as well as the credit quality and underwriting standards of an organization’s portfolio. In addition, ASU No. 2016-13 amends the accounting for credit losses on available-for-sale (AFS) debt securities and purchased financial assets with credit deterioration. The other-than-temporary impairment model of accounting for credit losses on AFS debt securities will be replaced with an estimate of expected credit losses only when the fair value is below the amortized cost of the asset. The length of time the fair value of an AFS debt security has been below the amortized cost will no longer impact the determination of whether a credit loss exists. The AFS debt security model will also require the use of an allowance to record the estimated losses (and subsequent recoveries). The accounting for the initial recognition of the estimated expected credit losses for purchased financial assets with credit deterioration would be recognized through an allowance for credit losses with an offset to the cost basis of the related financial asset at acquisition (i.e., there is no impact to net income at initial recognition). The Company plans to adopt ASU No. 2016-13 in the first quarter of 2020. The guidance is to be applied on a modified retrospective basis with the cumulative effect of initially applying the amendments recognized in retained earnings at the date of initial application. The Company has assembled a project team that meets regularly to evaluate the provisions of this ASU, identify additional data requirements necessary and determine an approach for implementation. The team has assigned roles and responsibilities and developed key tasks to complete and a general timeline to be followed. The Company is evaluating the effect that this ASU will have on the consolidated financial statements and disclosures. Economic conditions and the composition of the Company’s loan portfolio at the time of adoption will influence the extent of the adopting accounting adjustment. Condensed Consolidated Statements of Cash Flows error. Subsequent to the issuance of interim Condensed Consolidated Financial Statements (unaudited) for the quarter ended March 31, 2017, the Company and the Utilities identified an error within their previously reported interim Condensed Consolidated Statements of Cash Flows (unaudited). The timing of certain capital expenditure payments, including those that had retainage balances or were related to certain capitalized amounts were not reflected timely. The Company and the Utilities have evaluated the effect of the error, both qualitatively and quantitatively, and concluded that it is immaterial to their respective previously issued condensed consolidated financial statements. For the three months ended March 31, 2017, the correction of this error resulted in decreases in Net Cash Provided by Operating Activities (impacting the change in Accounts, Interest and Dividends Payable for the Company and Accounts Payable for the Utilities) and Net Cash Used in Investing Activities (impacting the Capital Expenditures for the Company and the Utilities) of $47 million . Reclassifications. Reclassifications made to prior year-end financial statements to conform to 2018 presentation include a reclassification of contributions in aid of construction balances to “Property, plant and equipment, net” and “Total property, plant and equipment, net” for the Company and Hawaiian Electric, respectively, which reduced the amounts of the respective balances.

Segment financial information

Segment financial information	3 Months Ended
	Mar. 31, 2018
Segment Reporting [Abstract]
Segment financial information	Segment financial information (in thousands) Electric utility Bank Other Total Three months ended March 31, 2018 Revenues from external customers $ 570,414 $ 75,419 $ 41 $ 645,874 Intersegment revenues (eliminations) 13 — (13 ) — Revenues $ 570,427 $ 75,419 $ 28 $ 645,874 Income (loss) before income taxes $ 37,149 $ 24,500 $ (8,373 ) $ 53,276 Income taxes (benefit) 9,175 5,540 (2,159 ) 12,556 Net income (loss) 27,974 18,960 (6,214 ) 40,720 Preferred stock dividends of subsidiaries 499 — (26 ) 473 Net income (loss) for common stock $ 27,475 $ 18,960 $ (6,188 ) $ 40,247 Total assets (at March 31, 2018) $ 5,710,569 $ 6,889,445 $ 102,704 $ 12,702,718 Three months ended March 31, 2017 Revenues from external customers $ 518,566 $ 72,856 $ 140 $ 591,562 Intersegment revenues (eliminations) 45 — (45 ) — Revenues $ 518,611 $ 72,856 $ 95 $ 591,562 Income before income taxes $ 34,722 $ 24,160 $ (7,300 ) $ 51,582 Income taxes 12,758 8,347 (4,189 ) 16,916 Net income 21,964 15,813 (3,111 ) 34,666 Preferred stock dividends of subsidiaries 499 — (26 ) 473 Net income for common stock $ 21,465 $ 15,813 $ (3,085 ) $ 34,193 Total assets (at December 31, 2017) $ 5,630,613 $ 6,798,659 $ 104,888 $ 12,534,160 Intercompany electricity sales of the Utilities to the bank and “other” segments are not eliminated because those segments would need to purchase electricity from another source if it were not provided by the Utilities and the profit on such sales is nominal. Bank fees that ASB charges the Utilities and “other” segments are not eliminated because those segments would pay fees to another financial institution if they were to bank with another institution and the profit on such fees is nominal. Hamakua Energy’s sales to Hawaii Electric Light (a regulated affiliate) are eliminated in consolidation. Hamakua Energy's profit on electricity sales to Hawaii Electric Light is not required to be eliminated because the PPA was approved by the PUC and it is probable that, through the ratemaking process, future revenue from Hawaii Electric Light’s sale of the electricity will approximate its purchase price from Hamakua Energy under the PPA.

Electric utility segment

Electric utility segment	3 Months Ended
	Mar. 31, 2018
Electric utility subsidiary [Abstract]
Electric utility segment	Electric utility segment Revenue taxes. The Utilities’ revenues include amounts for recovery of various Hawaii state revenue taxes. Revenue taxes are generally recorded as an expense in the period the related revenues are recognized. For the three months ended March 31, 2018 and 2017 , the Utilities’ revenues include recovery of revenue taxes of approximately $51 million and $46 million , respectively, which amounts are in “Taxes, other than income taxes” expense, in the unaudited condensed consolidated statements of income. However, the Utilities pay revenue taxes to the taxing authorities in the period based on (1) the prior year’s billed revenues (in the case of public service company taxes and PUC fees) in the current year or (2) the current year’s cash collections from electric sales (in the case of franchise taxes) after year-end. Unconsolidated variable interest entities. HECO Capital Trust III . Trust III has at all times been an unconsolidated subsidiary of Hawaiian Electric. Since Hawaiian Electric, as the holder of 100% of the trust common securities, does not have the power to direct the activities that most significantly impact the economic performance of Trust III nor the obligation to absorb their expected losses, if any, that could potentially be significant to the Trust III, Hawaiian Electric is not the primary beneficiary and does not consolidate Trust III in accordance with accounting rules on the consolidation of VIEs. Trust III’s balance sheets as of March 31, 2018 and December 31, 2017 each consisted of $51.5 million of 2004 Debentures; $50.0 million of 2004 Trust Preferred Securities; and $1.5 million of trust common securities. Trust III’s income statements for the three months ended March 31, 2018 consisted of $0.8 million of interest income received from the 2004 Debentures; $0.8 million of distributions to holders of the Trust Preferred Securities; and $25,000 of common dividends on the trust common securities to Hawaiian Electric. Power purchase agreements . As of March 31, 2018 , the Utilities had five PPAs for firm capacity and other PPAs with independent power producers (IPPs) and Schedule Q providers (i.e., customers with cogeneration and/or power production facilities who buy power from or sell power to the Utilities), none of which is currently required to be consolidated as VIEs. Pursuant to the current accounting standards for VIEs, the Utilities are deemed to have a variable interest in Kalaeloa Partners, L.P. (Kalaeloa), AES Hawaii, Inc. (AES Hawaii) and the predecessor of Hamakua Energy by reason of the provisions of the PPA that the Utilities have with the three IPPs. However, management has concluded that the Utilities are not the primary beneficiary of Kalaeloa, AES Hawaii and the predecessor of Hamakua Energy because the Utilities do not have the power to direct the activities that most significantly impact the three IPPs’ economic performance nor the obligation to absorb their expected losses, if any, that could potentially be significant to the IPPs. Thus, the Utilities have not consolidated Kalaeloa, AES Hawaii and the predecessor of Hamakua Energy in its unaudited condensed consolidated financial statements. HEI, however, through Pacific Current now owns Hamakua Energy and consolidates it in the HEI unaudited condensed consolidated financial statements. For the other IPPs, the Utilities have concluded that the consolidation of the IPPs was not required because either the Utilities do not have variable interests in the IPPs due to the absence of an obligation in the PPAs for the Utilities to absorb any variability of the IPPs, or the IPPs were “governmental organization,” and thus excluded from the scope of accounting standards for VIEs. Two IPPs of as-available energy declined to provide the information necessary for Utilities to determine the applicability of accounting standards for VIEs. If information is ultimately received from the IPPs, a possible outcome of future analyses of such information is the consolidation of one or both of such IPPs in the unaudited condensed consolidated financial statements. The consolidation of any significant IPP could have a material effect on the unaudited condensed consolidated financial statements, including the recognition of a significant amount of assets and liabilities and, if such a consolidated IPP were operating at a loss and had insufficient equity, the potential recognition of such losses. If the Utilities determine they are required to consolidate the financial statements of such an IPP and the consolidation has a material effect, the Utilities would retrospectively apply accounting standards for VIEs to the IPP. Commitments and contingencies. Contingencies . The Utilities are subject in the normal course of business to pending and threatened legal proceedings. Management does not anticipate that the aggregate ultimate liability arising out of these pending or threatened legal proceedings will be material to its financial position. However, the Utilities cannot rule out the possibility that such outcomes could have a material effect on the results of operations or liquidity for a particular reporting period in the future. Interim increases . For the three months ended March 31, 2018, the Utilities recognized $7.0 million of revenues with respect to interim orders related to general rate increase requests. Such recorded amounts are subject to refund, with interest, if they exceed amounts in a final order. Power purchase agreements . Purchases from all IPPs were as follows: Three months ended March 31 (in millions) 2018 2017 Kalaeloa $ 40 $ 40 AES Hawaii 37 29 HPOWER 15 17 Puna Geothermal Venture 11 8 Hamakua Energy 7 7 Other IPPs 1 30 26 Total IPPs $ 140 $ 127 1 Includes wind power, solar power, feed-in tariff projects and other PPAs. Kalaeloa Partners, L.P. Under a 1988 PPA, as amended, Hawaiian Electric is committed to purchase 208 MW of firm capacity from Kalaeloa. Hawaiian Electric and Kalaeloa are currently in negotiations to address the PPA term that ended on May 23, 2016. The PPA automatically extends on a month-to-month basis as long as the parties are still negotiating in good faith, but would end 60 days after either party notifies the other in writing that negotiations have terminated. Hawaiian Electric and Kalaeloa have agreed that neither party will terminate the PPA prior to October 31, 2018. This agreement contemplates continued negotiations between the parties and accounts for time needed for PUC approval of a negotiated resolution. AES Hawaii, Inc. Under a PPA entered into in March 1988, as amended (through Amendment No. 2) for a period of 30 years beginning September 1992, Hawaiian Electric agreed to purchase 180 MW of firm capacity from AES Hawaii. In August 2012, Hawaiian Electric filed an application with the PUC seeking an exemption from the PUC’s Competitive Bidding Framework to negotiate an amendment to the PPA to purchase 186 MW of firm capacity, and amend the energy pricing formula in the PPA. The PUC approved the exemption in April 2013, but Hawaiian Electric and AES Hawaii were not able to reach agreement on the amendment. In June 2015, AES Hawaii filed an arbitration demand regarding a dispute about whether Hawaiian Electric was obligated to buy up to 9 MW of additional capacity based on a 1992 letter. Hawaiian Electric responded to the arbitration demand and in October 2015, AES Hawaii and Hawaiian Electric entered into a Settlement Agreement to stay the arbitration proceeding. The Settlement Agreement included certain conditions precedent which, if satisfied, would have released the parties from the claims under the arbitration proceeding. Among the conditions precedent was the successful negotiation and PUC approval of an amendment to the existing PPA. In November 2015, Hawaiian Electric entered into Amendment No. 3 for which PUC approval was requested and subsequently denied in January 2017. Approval of Amendment No. 3 would have satisfied the final condition for effectiveness of the Settlement Agreement and resolved AES Hawaii's claims. Following the PUC's decision, the parties agreed to extend the stay of the arbitration proceeding, while settlement discussions continued. In February 2018, Hawaiian Electric reached agreement with AES Hawaii on Amendment No. 4, which is subject to PUC approval. Amendment No. 4, among other things, provides (1) that AES Hawaii will make certain operational commitments to improve reliability, (2) for inclusion of AES Hawaii in the Utilities’ greenhouse gas partnership, (3) provisions to allow AES Hawaii to reduce coal combustion by modifying its fuel consumption to include biomass upon approval by Hawaiian Electric, and (4) for release of an option agreement by Hawaiian Electric for land owned by AES Hawaii. Amendment No. 4 includes a stay of the arbitration proceeding pending review by the PUC. If approved by the PUC, Amendment No. 4 will resolve AES Hawaii’s claims. Hu Honua Bioenergy, LLC. In May 2012, Hawaii Electric Light signed a PPA, which the PUC approved in December 2013, with Hu Honua Bioenergy, LLC (Hu Honua) for 21.5 MW of renewable, dispatchable firm capacity fueled by locally grown biomass from a facility on the island of Hawaii. Under the terms of the PPA, the Hu Honua plant was scheduled to be in service in 2016. However, Hu Honua encountered construction delays, failed to meet its obligations under the PPA and failed to provide adequate assurances that it could perform or had the financial means to perform. Hawaii Electric Light terminated the PPA on March 1, 2016. On November 30, 2016, Hu Honua filed a civil complaint in the United States District Court for the District of Hawaii that included claims purportedly arising out of the termination of Hu Honua’s PPA. On May 26, 2017, Hawaii Electric Light and Hu Honua entered into a settlement agreement that will settle all claims related to the termination of the original PPA. The settlement agreement was contingent on the PUC’s approval of an amended and restated PPA between Hawaii Electric Light and Hu Honua dated May 5, 2017. In July 2017, the PUC approved the amended and restated PPA. On August 25, 2017, the PUC’s approval was appealed by a third party. The appeal is still pending. Hu Honua is expected to be on-line by the end of 2018. Utility projects . Many public utility projects require PUC approval and various permits from other governmental agencies. Difficulties in obtaining, or the inability to obtain, the necessary approvals or permits can result in significantly increased project costs or even cancellation of projects. In the event a project does not proceed, or if it becomes probable the PUC will disallow cost recovery for all or part of a project, or if PUC-imposed caps on project costs are expected to be exceeded, project costs may need to be written off in amounts that could result in significant reductions in Hawaiian Electric’s consolidated net income. Enterprise Resource Planning/Enterprise Asset Management (ERP/EAM) implementation project. On August 11, 2016, the PUC approved the Utilities’ request to commence the ERP/EAM implementation project, subject to certain conditions, including a $77.6 million cap on cost recovery as well as a requirement that the Utilities pass onto customers a minimum of $244 million in benefits associated with the system over its 12 -year service life. The decision and order (D&O) approved the deferral of certain project costs and allowed the accrual of allowance for funds used during construction (AFUDC), but limited the AFUDC rate to 1.75% . Pursuant to the D&O and subsequent orders, in September 2017, the Utilities filed a bottom-up, low-level analysis of the project’s benefits and performance metrics and tracking mechanism for passing the project’s benefits on to customers. On November 30, 2017, the PUC issued an order, which, among other things, directed the Utilities to file a position statement regarding the reasonableness of the project, a reworked low-level benefits analysis and initial details of the metrics that will be used to demonstrate the achievement of benefits. On December 18, 2017, the Utilities filed their response to the order, re-affirming the need for the project and guaranteed minimum level of $244 million in benefits to customers. The response further noted that in Hawaiian Electric’s 2017 test year rate case, Hawaiian Electric and the Consumer Advocate have agreed in principle to a “rate case-centric” approach for a benefits delivery mechanism pending PUC approval. On January 4, 2018, the Consumer Advocate filed a statement of position (SOP) on the Utilities’ response, stating that it does not recommend revocation of the PUC’s prior conditional approval of the project or reductions to the previously ordered cost caps, and continues to recommend the use of a rate case-centric approach to facilitate pass through of the system’s benefits to customers. The Utilities filed a response to the Consumer Advocate’s SOP on January 11, 2018, noting among other things that the Consumer Advocate’s SOP is in general alignment with the Utilities’ position on the project. Monthly reports on the status and costs of the project continue to be filed. Further discussions with the PUC continue on the calculations of the benefits. The ERP/EAM Implementation Project is expected to go live by October 1, 2018. As of March 31, 2018 , the Project incurred costs of $47.7 million of which $8.6 million were charged to other operation and maintenance (O&M) expense, $2.6 million relate to capital costs and $36.5 million are deferred costs. Schofield Generating Station Project. In August 2012, the PUC approved a waiver from the competitive bidding framework to allow Hawaiian Electric to negotiate with the U.S. Army for the construction of a 50 MW utility owned and operated firm, renewable and dispatchable generation facility at Schofield Barracks. In September 2015, the PUC approved Hawaiian Electric’s application to expend $167 million for the project. In approving the project, the PUC placed a cost cap of $167 million for the project, stated 90% of the cap is allowed for cost recovery through cost recovery mechanisms other than base rates, and stated the $167 million cap will be adjusted downward due to any reduction in the cost of the engine contract due to a reduction in the foreign exchange rate. Hawaiian Electric was required to take all necessary steps to lock in the lowest possible exchange rate. On January 5, 2016, Hawaiian Electric executed window forward contracts, which lowered the cost of the engine contract by $9.7 million , resulting in a revised project cost cap of $157.3 million . Hawaiian Electric has received all of the major permits for the project, including a 35 -year site lease from the U.S. Army. Construction of the facility began in October 2016, and the facility is expected to be placed in service in the second quarter of 2018. A request to recover the costs of the project and related operations and maintenance expense through the newly-established Major Project Interim Recovery (MPIR) adjustment mechanism is pending PUC approval. (See “Decoupling” section below for MPIR guidelines and capital cost recovery discussion.) Project costs incurred as of March 31, 2018 amounted to $131.6 million . West Loch PV Project. In July 2016, Hawaiian Electric announced plans to build, own and operate a utility-owned, grid-tied 20 -MW (ac) solar facility in conjunction with the Department of the Navy at a Navy/Air Force joint base. In June 2017, the PUC approved the expenditure of funds for the project, including Hawaiian Electric’s proposed project cost cap of $67 million and a performance guarantee to provide energy at 9.56 cents /KWH or less to the system. Project costs incurred as of March 31, 2018 amounted to $7.0 million . In approving the project, the PUC agreed that the project is eligible for recovery of costs offset by related net benefits under the newly-established MPIR adjustment mechanism. (See “Decoupling” section below for MPIR guidelines and capital cost recovery discussion.) Hawaiian Electric provided supplemental materials in August 2017, as requested by the PUC, to support meeting the MPIR guidelines, accompanied by system performance guarantee and cost savings sharing mechanisms. A decision on these matters is pending. Hawaiian Electric executed a fixed-price Engineering, Procurement, and Construction (EPC) contract for the project on December 5, 2017. The EPC contract includes the cost of the solar panels for the project, which is not subject to modification due to any tariffs that may be imposed under the current photovoltaic (PV) cell and module import tariff guidelines. Construction of the facility is scheduled to begin in the second quarter of 2018, and the facility is expected to be placed in service in the fourth quarter of 2018. Hawaiian Telcom . The Utilities each have separate agreements for the joint ownership and maintenance of utility poles with Hawaiian Telcom, Inc. (Hawaiian Telcom), the respective county or counties in which each utility operates and other third parties, such as the State of Hawaii. The agreements set forth various circumstances requiring pole removal/installation/replacement and the sharing of costs among the joint pole owners. The agreements allow for the cost of work done by one joint pole owner to be shared by the other joint pole owners based on the apportionment of costs in the agreements. The Utilities have maintained, replaced and installed the majority of the jointly-owned poles in each of the respective service territories, and have billed the other joint pole owners for their respective share of the costs. The counties and the State have been reimbursing the Utilities for their share of the costs. However, Hawaiian Telcom has been delinquent in reimbursing the Utilities for its share of the costs. Hawaiian Electric initiated a dispute resolution process to collect the unpaid amounts from Hawaiian Telcom as specified by the joint pole agreement. This dispute resolution process is stayed pending settlement negotiations. For Hawaii Electric Light, the agreement does not specify an alternative dispute resolution process, and thus a complaint for payment was filed with the Circuit Court in June 2016. This complaint is stayed pending settlement negotiations. Maui Electric has not yet commenced any legal action to recover the delinquent amounts. On April 4, 2018, the Utilities and Hawaiian Telcom entered into several agreements, subject to PUC approval, for the purchase by the Utilities of Hawaiian Telcom’s interest in all the joint poles, and licensing and operating agreement between the Utilities and Hawaiian Telcom subsequent to the transfer of the joint pole interest to the Utilities. Consideration of approximately $48 million to be paid for Hawaiian Telcom’s interest in the poles will be offset in part by the receivables owed by Hawaiian Telcom to the Utilities. As of March 31, 2018 , receivables under the joint pole agreement, net of a reserve for a portion of the interest, from Hawaiian Telcom are $22.4 million ( $15.1 million at Hawaiian Electric, $6.0 million at Hawaii Electric Light, and $1.3 million at Maui Electric). Management expects the net receivable amounts will be realized. The remaining consideration for acquiring Hawaiian Telcom’s interest in the joint poles is to be settled through the set-off of current and future license fees due from Hawaiian Telcom, after which Hawaiian Telcom would resume cash payments for license fees under the agreement. Environmental regulation . The Utilities are subject to environmental laws and regulations that regulate the operation of existing facilities, the construction and operation of new facilities and the proper cleanup and disposal of hazardous waste and toxic substances. Hawaiian Electric, Hawaii Electric Light and Maui Electric, like other utilities, periodically encounter petroleum or other chemical releases into the environment associated with current or previous operations. The Utilities report and take action on these releases when and as required by applicable law and regulations. The Utilities believe the costs of responding to such releases identified to date will not have a material effect, individually or in the aggregate, on Hawaiian Electric’s consolidated results of operations, financial condition or liquidity. Former Molokai Electric Company generation site . In 1989, Maui Electric acquired by merger Molokai Electric Company. Molokai Electric Company had sold its former generation site (Site) in 1983, but continued to operate at the Site under a lease until 1985. The Environmental Protection Agency (EPA) has since identified environmental impacts in the subsurface soil at the Site. Although Maui Electric never operated at the Site or owned the Site property, after discussions with the EPA and the Hawaii Department of Health (DOH), Maui Electric agreed to undertake additional investigations at the Site and an adjacent parcel that Molokai Electric Company had used for equipment storage (the Adjacent Parcel) to determine the extent of environmental contamination. A 2011 assessment by a Maui Electric contractor of the Adjacent Parcel identified environmental impacts, including elevated polychlorinated biphenyls (PCBs) in the subsurface soils. In cooperation with the DOH and EPA, Maui Electric is further investigating the Site and the Adjacent Parcel to determine the extent of impacts of PCBs, residual fuel oils and other subsurface contaminants. Maui Electric has a reserve balance of $2.7 million as of March 31, 2018 , representing the probable and reasonably estimated cost to complete the additional investigation and estimated cleanup costs at the Site and the Adjacent Parcel; however, final costs of remediation will depend on the results of continued investigation. Pearl Harbor sediment study . In July 2014, the U.S. Navy notified Hawaiian Electric of the Navy’s determination that Hawaiian Electric is a Potentially Responsible Party responsible for cleanup of PCB contamination in sediment in the area offshore of the Waiau Power Plant as part of the Pearl Harbor Superfund Site. The Navy has also requested that Hawaiian Electric reimburse the costs incurred by the Navy to investigate the area. The Navy has completed a remedial investigation and a feasibility study (FS) for the remediation of contaminated sediment at several locations in Pearl Harbor and issued its Final FS Report on June 29, 2015. On February 2, 2016, the Navy released the Proposed Plan for Pearl Harbor Sediment Remediation and Hawaiian Electric submitted comments. The extent of the contamination, the appropriate remedial measures to address it and Hawaiian Electric’s potential responsibility for any associated costs have not been determined. On March 23, 2015, Hawaiian Electric received a letter from the EPA requesting that Hawaiian Electric submit a work plan to assess potential sources and extent of PCB contamination onshore at the Waiau Power Plant. Hawaiian Electric submitted a sampling and analysis (SAP) work plan to the EPA and the DOH. Onshore sampling at the Waiau Power Plant was completed in two phases in December 2015 and June 2016. Appropriate remedial measures are being developed to address the extent of the onshore contamination, and any associated costs have not yet been determined. As of March 31, 2018 , the reserve account balance recorded by Hawaiian Electric to address the PCB contamination was $4.7 million . The reserve represents the probable and reasonably estimable cost to complete the onshore and offshore investigations and the remediation of PCB contamination in the offshore sediment. The final remediation costs will depend on the assessment of potential source control requirements, as well as the further investigation of contaminated sediment offshore from the Waiau Power Plant by the Navy. Regulatory proceedings Decoupling . Decoupling is a regulatory model that is intended to facilitate meeting the State of Hawaii’s goals to transition to a clean energy economy and achieve an aggressive renewable portfolio standard. The decoupling model implemented in Hawaii delinks revenues from sales and includes annual rate adjustments. The decoupling mechanism has three components: (1) a sales decoupling component via a revenue balancing account (RBA), (2) a revenue escalation component via a rate adjustment mechanism (RAM) and (3) an earnings sharing mechanism, which would provide for a reduction of revenues between rate cases in the event the utility exceeds the return on average common equity (ROACE) allowed in its most recent rate case. Decoupling provides for more timely cost recovery and earning on investments. For the RAM years 2014 - 2016, Hawaiian Electric was allowed to record RAM revenue beginning on January 1 and to bill such amounts from June 1 of the applicable year through May 31 of the following year. Subsequent to 2016, Hawaiian Electric reverted to the RAM provisions initially approved in March 2011—i.e., RAM is both accrued and billed from June 1 of each year through May 31 of the following year. 2015 decoupling order . On March 31, 2015, the PUC issued an Order (the 2015 Decoupling Order) that modified the RAM portion of the decoupling mechanism to be capped at the lesser of the RAM revenue adjustment as then determined (based on an inflationary adjustment for certain O&M expenses and return on investment for certain rate base changes) and a RAM revenue adjustment calculated based on the cumulative annual compounded increase in Gross Domestic Product Price Index applied to annualized target revenues (the RAM Cap). The 2015 Decoupling Order provided a specific basis for calculating the target revenues until the next rate case, at which time the target revenues will reset upon the issuance of an interim or final D&O in a rate case. The triennial rate case cycle required under the decoupling mechanism continues to serve as the maximum period between the filing of general rate cases. The RAM Cap impacted the Utilities' recovery of capital investments as follows: • Hawaiian Electric's RAM revenues were limited to the RAM Cap in 2017 and 2018. • Maui Electric's RAM revenues in 2017 and 2018 were below the RAM Cap. • Hawaii Electric Light’s RAM revenues were below the RAM Cap in 2017; however, the 2018 RAM revenues were limited to the RAM Cap. 2017 decoupling order . On April 27, 2017, the PUC issued an Order (the 2017 Decoupling Order) that required the establishment of specific performance-incentive mechanisms and provided guidelines for interim recovery of revenues to support major projects placed in service between general rate cases. The performance-incentive mechanisms are discussed further in the section below. The 2017 Decoupling Order also established guidelines for MPIR. Projects eligible for recovery through the MPIR adjustment mechanism are major projects (i.e., projects with capital expenditures net of customer contributions in excess of $2.5 million ), including but not restricted to renewable energy, energy efficiency, utility scale generation, grid modernization and smaller qualifying projects grouped into programs for review. The MPIR adjustment mechanism provides the opportunity to recover revenues for net costs of approved eligible projects placed in service between general rate cases wherein cost recovery is limited by a revenue cap and is not provided by other effective recovery mechanisms. The request for PUC approval must include a business case and all costs that are allowed to be recovered through the MPIR adjustment mechanism must be offset by any related benefits. The guidelines provide for accrual of revenues approved for recovery upon in-service date to be collected from customers through the annual RBA tariff. Capital projects which are not recovered through the MPIR would be included in the RAM and be subject to the RAM cap, until the next rate case when the utilities would request recovery in base rates. In the 2017 Decoupling Order, the PUC indicated that in pending and subsequent rate cases, the PUC intends to require all fuel expenses and purchased energy expenses be recovered through an appropriately modified energy cost adjustment mechanism, rather than through base rates, and will consider adopting processes to periodically reset fuel efficiency measures embedded in the energy cost adjustment mechanism to account for changes in the generating system. Annual decoupling filings . On March 29, 2018, the Utilities submitted to the PUC their annual decoupling filings for tariffed rates effective from June 1, 2018 through May 31, 2019. The net annual incremental amounts to be collected (refunded) are as follows: (in millions) Hawaiian Electric Hawaii Electric Light Maui Electric 2018 Annual incremental RAM adjusted revenues $ 13.8 $ 3.4 $ 2.3 Annual change in accrued RBA balance as of December 31, 2017 (and associated revenue taxes) $ 6.6 $ 0.7 $ 3.2 2017 Tax Reform Act Adjustment $ — $ — $ (2.4 ) Net annual incremental amount to be collected under the tariffs $ 20.4 $ 4.1 $ 3.1 * Maui Electric incorporated a ( $2.4 million ) adjustment into its 2018 annual decoupling filing to incorporate the impact of the lower corporate income tax rate and the exclusion of the domestic production activities deduction, as a result of the Tax Act. Tax adjustments for Hawaiian Electric and Hawaii Electric Light are described in the discussion below of their respective on-going rate cases. Performance incentive mechanisms . The PUC has ordered the following performance incentive mechanisms (PIM), which will be reflected in the annual decoupling filing beginning in 2019. • Service Quality performance incentives are measured on a calendar-year basis beginning in 2018. • Service Reliability Performance measured by System Average Interruption Duration and Frequency Indexes (penalties only). Target performance is based on each utility’s historical 10 -year average performance with a deadband of one standard deviation. The maximum penalty for each performance index is 20 basis points applied to the common equity share of each respective utility’s rate base (or approximately $6.2 million penalty for both in total for the three utilities). • Call Center Performance measured by the percentage of calls answered within 30 seconds. Target performance is based on the annual average performance for each utility for the most recent 8 quarters with a deadband of 3% above and below the target. The maximum penalty or incentive is 8 basis points applied to the common equity share of each respective utility’s rate base (or approximately $1.2 million penalty or incentive in total for the three utilities). • Demand Response measured by the demand response resources acquired in 2018. The award is equal to 5% of the total of the annual maintenance cost for cost-effective demand response capability contracted with aggregators by December 31, 2018. The maximum award is $0.5 million for the three utilities in total and there are no penalties. This incentive applies to one-time performance in 2018 only. • Procurement of low-cost variable renewable resources through the request for proposal process in 2018 measured by comparison of the procurement price to target prices. The incentive is 20% of savings determined by comparing procured price to a target of 11.5 cents per kilowatt-hour for renewable projects with storage capability and 9.5 cents per kilowatt-hour for energy-only renewable projects. This incentive has a cap of $3.5 million for the three utilities in total and has no penalty. Performance-based regulation proceeding. On April 18, 2018, the PUC issued an order, instituting a proceeding to investigate performance-based regulation (PBR). The PUC intends to provide a forum to collaboratively develop modifications or new components to better align utility and customer interests. The PUC stated that PBR seeks to utilize both revenue adjustment mechanisms and performance mechanisms to more strongly align utilities’ incentives with customer interests. The order stated that, in general, the PUC is interested in ratemaking elements and/or mechanisms that result in: • Greater cost control and reduced rate volatility; • Efficient investment and allocation of resources regardless of classification as capital or operating expense; • Fair distribution of risks between utilities and customers; and • Fulfillment of State policy goals. The PUC envisions that the PBR components through this investigation are those that: (a) target areas of current utility perf

Bank segment

Bank segment	3 Months Ended
	Mar. 31, 2018
Bank Subsidiary [Abstract]
Bank segment	Bank segment Selected financial information American Savings Bank, F.S.B. Statements of Income Data Three months ended March 31 (in thousands) 2018 2017 Interest and dividend income Interest and fees on loans $ 52,800 $ 50,742 Interest and dividends on investment securities 9,202 6,980 Total interest and dividend income 62,002 57,722 Interest expense Interest on deposit liabilities 2,957 2,103 Interest on other borrowings 496 816 Total interest expense 3,453 2,919 Net interest income 58,549 54,803 Provision for loan losses 3,541 3,907 Net interest income after provision for loan losses 55,008 50,896 Noninterest income Fees from other financial services 4,654 5,610 Fee income on deposit liabilities 5,189 5,428 Fee income on other financial products 1,654 1,866 Bank-owned life insurance 871 983 Mortgage banking income 613 789 Other income, net 436 458 Total noninterest income 13,417 15,134 Noninterest expense Compensation and employee benefits 24,440 23,042 Occupancy 4,280 4,154 Data processing 3,464 3,280 Services 3,047 2,360 Equipment 1,728 1,748 Office supplies, printing and postage 1,507 1,535 Marketing 645 517 FDIC insurance 713 728 Other expense 4,101 4,506 Total noninterest expense 43,925 41,870 Income before income taxes 24,500 24,160 Income taxes 5,540 8,347 Net income $ 18,960 $ 15,813 Reconciliation to amounts per HEI Condensed Consolidated Statements of Income*: Three months ended March 31 (in thousands) 2018 2017 Interest and dividend income $ 62,002 $ 57,722 Noninterest income 13,417 15,134 *Revenues-Bank 75,419 72,856 Total interest expense 3,453 2,919 Provision for loan losses 3,541 3,907 Noninterest expense 43,925 41,870 Less: Retirement defined benefits expense—other than service costs (387 ) (195 ) *Expenses-Bank 50,532 48,501 *Operating income-Bank 24,887 24,355 Add back: Retirement defined benefits expense—other than service costs 387 195 Income before income taxes $ 24,500 $ 24,160 American Savings Bank, F.S.B. Statements of Comprehensive Income Data Three months ended March 31 (in thousands) 2018 2017 Net income $ 18,960 $ 15,813 Other comprehensive income (loss), net of taxes: Net unrealized gains (losses) on available-for-sale investment securities: Net unrealized gains (losses) on available-for-sale investment securities arising during the period, net of (taxes) benefits of $4,867 and $(148), respectively (13,297 ) 223 Retirement benefit plans: Adjustment for amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of tax benefits of $694 and $404, respectively 1,222 612 Other comprehensive income (loss), net of taxes (12,075 ) 835 Comprehensive income $ 6,885 $ 16,648 American Savings Bank, F.S.B. Balance Sheets Data (in thousands) March 31, 2018 December 31, 2017 Assets Cash and due from banks $ 123,580 $ 140,934 Interest-bearing deposits 90,643 93,165 Investment securities Available-for-sale, at fair value 1,418,490 1,401,198 Held-to-maturity, at amortized cost (fair value of $42,491 and $44,412, respectively) 43,450 44,515 Stock in Federal Home Loan Bank, at cost 10,158 9,706 Loans held for investment 4,742,024 4,670,768 Allowance for loan losses (53,895 ) (53,637 ) Net loans 4,688,129 4,617,131 Loans held for sale, at lower of cost or fair value 7,379 11,250 Other 425,426 398,570 Goodwill 82,190 82,190 Total assets $ 6,889,445 $ 6,798,659 Liabilities and shareholder’s equity Deposit liabilities—noninterest-bearing $ 1,795,114 $ 1,760,233 Deposit liabilities—interest-bearing 4,283,953 4,130,364 Other borrowings 100,430 190,859 Other 106,482 110,356 Total liabilities 6,285,979 6,191,812 Commitments and contingencies Common stock 1 1 Additional paid in capital 345,652 345,018 Retained earnings 300,837 292,957 Accumulated other comprehensive loss, net of tax benefits Net unrealized losses on securities $ (28,248 ) $ (14,951 ) Retirement benefit plans (14,776 ) (43,024 ) (16,178 ) (31,129 ) Total shareholder’s equity 603,466 606,847 Total liabilities and shareholder’s equity $ 6,889,445 $ 6,798,659 Other assets Bank-owned life insurance $ 149,656 $ 148,775 Premises and equipment, net 164,702 136,270 Prepaid expenses 4,549 3,961 Accrued interest receivable 18,461 18,724 Mortgage-servicing rights 8,541 8,639 Low-income housing equity investments 57,222 59,016 Real estate acquired in settlement of loans, net — 133 Other 22,295 23,052 $ 425,426 $ 398,570 Other liabilities Accrued expenses $ 49,034 $ 39,312 Federal and state income taxes payable 1,369 3,736 Cashier’s checks 22,990 27,000 Advance payments by borrowers 6,255 10,245 Other 26,834 30,063 $ 106,482 $ 110,356 Bank-owned life insurance is life insurance purchased by ASB on the lives of certain key employees, with ASB as the beneficiary. The insurance is used to fund employee benefits through tax-free income from increases in the cash value of the policies and insurance proceeds paid to ASB upon an insured’s death. Other borrowings consisted of securities sold under agreements to repurchase and advances from the Federal Home Loan Bank (FHLB) of $50 million and $50 million , respectively, as of March 31, 2018 and $141 million and $50 million , respectively, as of December 31, 2017 . Investment securities. The major components of investment securities were as follows: Amortized cost Gross unrealized gains Gross unrealized losses Estimated fair value Gross unrealized losses Less than 12 months 12 months or longer (dollars in thousands) Number of issues Fair value Amount Number of issues Fair value Amount March 31, 2018 Available-for-sale U.S. Treasury and federal agency obligations $ 181,919 $ 164 $ (3,255 ) $ 178,828 18 $ 93,034 $ (1,424 ) 9 $ 68,489 $ (1,831 ) Mortgage-related securities- FNMA, FHLMC and GNMA 1,259,732 389 (35,886 ) 1,224,235 86 762,936 (17,161 ) 79 447,876 (18,725 ) Mortgage revenue bond 15,427 — — 15,427 — — — — — — $ 1,457,078 $ 553 $ (39,141 ) $ 1,418,490 104 $ 855,970 $ (18,585 ) 88 $ 516,365 $ (20,556 ) Held-to-maturity Mortgage-related securities- FNMA, FHLMC and GNMA $ 43,450 $ — $ (959 ) $ 42,491 3 $ 42,491 $ (959 ) — $ — $ — $ 43,450 $ — $ (959 ) $ 42,491 3 $ 42,491 $ (959 ) — $ — $ — December 31, 2017 Available-for-sale U.S. Treasury and federal agency obligations $ 185,891 $ 438 $ (2,031 ) $ 184,298 15 $ 83,137 $ (825 ) 8 $ 62,296 $ (1,206 ) Mortgage-related securities- FNMA, FHLMC and GNMA 1,220,304 793 (19,624 ) 1,201,473 67 653,635 (6,839 ) 77 459,912 (12,785 ) Mortgage revenue bond 15,427 — — 15,427 — — — — — — $ 1,421,622 $ 1,231 $ (21,655 ) $ 1,401,198 82 $ 736,772 $ (7,664 ) 85 $ 522,208 $ (13,991 ) Held-to-maturity Mortgage-related securities- FNMA, FHLMC and GNMA $ 44,515 $ 1 $ (104 ) $ 44,412 2 $ 35,744 $ (104 ) — $ — $ — $ 44,515 $ 1 $ (104 ) $ 44,412 2 $ 35,744 $ (104 ) — $ — $ — ASB does not believe that the investment securities that were in an unrealized loss position at March 31, 2018 , represent an other-than-temporary impairment (OTTI). Total gross unrealized losses were primarily attributable to rising interest rates relative to when the investment securities were purchased and not due to the credit quality of the investment securities. The contractual cash flows of the U.S. Treasury, federal agency obligations and mortgage-related securities are backed by the full faith and credit guaranty of the United States government or an agency of the government. ASB does not intend to sell the securities before the recovery of its amortized cost basis and there have been no adverse changes in the timing of the contractual cash flows for the securities. ASB did not recognize OTTI for the quarters ended March 31, 2018 and 2017 . U.S. Treasury, federal agency obligations, and the mortgage revenue bond have contractual terms to maturity. Mortgage-related securities have contractual terms to maturity, but require periodic payments to reduce principal. In addition, expected maturities will differ from contractual maturities because borrowers have the right to prepay the underlying mortgages. The contractual maturities of investment securities were as follows: March 31, 2018 Amortized cost Fair value (in thousands) Available-for-sale Due in one year or less $ 15,000 $ 14,902 Due after one year through five years 83,983 82,887 Due after five years through ten years 69,986 68,521 Due after ten years 28,377 27,945 197,346 194,255 Mortgage-related securities-FNMA, FHLMC and GNMA 1,259,732 1,224,235 Total available-for-sale securities $ 1,457,078 $ 1,418,490 Held-to-maturity Mortgage-related securities-FNMA, FHLMC and GNMA $ 43,450 $ 42,491 Total held-to-maturity securities $ 43,450 $ 42,491 Proceeds from the sale of available-for-sale securities were nil for both the three months ended March 31, 2018 and 2017 . Gross realized gains and losses were nil for both the three months ended March 31, 2018 and 2017 . Loans. The components of loans were summarized as follows: March 31, 2018 December 31, 2017 (in thousands) Real estate: Residential 1-4 family $ 2,116,121 $ 2,118,047 Commercial real estate 766,522 733,106 Home equity line of credit 914,941 913,052 Residential land 16,569 15,797 Commercial construction 114,535 108,273 Residential construction 15,363 14,910 Total real estate 3,944,051 3,903,185 Commercial 568,371 544,828 Consumer 230,258 223,564 Total loans 4,742,680 4,671,577 Less: Deferred fees and discounts (656 ) (809 ) Allowance for loan losses (53,895 ) (53,637 ) Total loans, net $ 4,688,129 $ 4,617,131 ASB's policy is to require private mortgage insurance on all real estate loans when the loan-to-value ratio of the property exceeds 80% of the lower of the appraised value or purchase price at origination. For non-owner occupied residential properties, the loan-to-value ratio may not exceed 80% of the lower of the appraised value or purchase price at origination. ASB is subject to the risk that the private mortgage insurance company cannot satisfy the bank's claim on policies. Allowance for loan losses. The allowance for loan losses (balances and changes) and financing receivables were as follows: (in thousands) Residential 1-4 family Commercial real estate Home Residential land Commercial construction Residential construction Commercial loans Consumer loans Unallo-cated Total Three months ended March 31, 2018 Allowance for loan losses: Beginning balance $ 2,902 $ 15,796 $ 7,522 $ 896 $ 4,671 $ 12 $ 10,851 $ 10,987 $ — $ 53,637 Charge-offs (31 ) — — (8 ) — — (602 ) (4,232 ) — (4,873 ) Recoveries 54 — 14 5 — — 1,170 347 — 1,590 Provision (400 ) 163 446 (219 ) (310 ) (8 ) (1,064 ) 4,933 — 3,541 Ending balance $ 2,525 $ 15,959 $ 7,982 $ 674 $ 4,361 $ 4 $ 10,355 $ 12,035 $ — $ 53,895 March 31, 2018 Ending balance: individually evaluated for impairment $ 1,207 $ 68 $ 892 $ 17 $ — $ — $ 519 $ 3 $ 2,706 Ending balance: collectively evaluated for impairment $ 1,318 $ 15,891 $ 7,090 $ 657 $ 4,361 $ 4 $ 9,836 $ 12,032 $ — $ 51,189 Financing Receivables: Ending balance $ 2,116,121 $ 766,522 $ 914,941 $ 16,569 $ 114,535 $ 15,363 $ 568,371 $ 230,258 $ 4,742,680 Ending balance: individually evaluated for impairment $ 17,728 $ 1,004 $ 10,265 $ 1,184 $ — $ — $ 4,385 $ 65 $ 34,631 Ending balance: collectively evaluated for impairment $ 2,098,393 $ 765,518 $ 904,676 $ 15,385 $ 114,535 $ 15,363 $ 563,986 $ 230,193 $ 4,708,049 Three months ended March 31, 2017 Allowance for loan losses: Beginning balance $ 2,873 $ 16,004 $ 5,039 $ 1,738 $ 6,449 $ 12 $ 16,618 $ 6,800 $ — $ 55,533 Charge-offs (6 ) — (14 ) — — — (1,510 ) (2,810 ) — (4,340 ) Recoveries 9 — 91 203 — — 297 297 — 897 Provision (95 ) 500 301 (462 ) 808 (1 ) (503 ) 3,359 — 3,907 Ending balance $ 2,781 $ 16,504 $ 5,417 $ 1,479 $ 7,257 $ 11 $ 14,902 $ 7,646 $ — $ 55,997 December 31, 2017 Ending balance: individually evaluated for impairment $ 1,248 $ 65 $ 647 $ 47 $ — $ — $ 694 $ 29 $ 2,730 Ending balance: collectively evaluated for impairment $ 1,654 $ 15,731 $ 6,875 $ 849 $ 4,671 $ 12 $ 10,157 $ 10,958 $ — $ 50,907 Financing Receivables: Ending balance $ 2,118,047 $ 733,106 $ 913,052 $ 15,797 $ 108,273 $ 14,910 $ 544,828 $ 223,564 $ 4,671,577 Ending balance: individually evaluated for impairment $ 18,284 $ 1,016 $ 8,188 $ 1,265 $ — $ — $ 4,574 $ 66 $ 33,393 Ending balance: collectively evaluated for impairment $ 2,099,763 $ 732,090 $ 904,864 $ 14,532 $ 108,273 $ 14,910 $ 540,254 $ 223,498 $ 4,638,184 Credit quality . ASB performs an internal loan review and grading on an ongoing basis. The review provides management with periodic information as to the quality of the loan portfolio and effectiveness of its lending policies and procedures. The objectives of the loan review and grading procedures are to identify, in a timely manner, existing or emerging credit trends so that appropriate steps can be initiated to manage risk and avoid or minimize future losses. Loans subject to grading include commercial, commercial real estate and commercial construction loans. Each commercial and commercial real estate loan is assigned an Asset Quality Rating (AQR) reflecting the likelihood of repayment or orderly liquidation of that loan transaction pursuant to regulatory credit classifications: Pass, Special Mention, Substandard, Doubtful and Loss. The AQR is a function of the probability of default model rating, the loss given default and possible non-model factors which impact the ultimate collectability of the loan such as character of the business owner/guarantor, interim period performance, litigation, tax liens and major changes in business and economic conditions. Pass exposures generally are well protected by the current net worth and paying capacity of the obligor or by the value of the asset or underlying collateral. Special Mention loans have potential weaknesses that, if left uncorrected, could jeopardize the liquidation of the debt. Substandard loans have well-defined weaknesses that jeopardize the liquidation of the debt and are characterized by the distinct possibility that the Bank may sustain some loss. An asset classified Doubtful has the weaknesses of those classified Substandard, with the added characteristic that the weaknesses make collection or liquidation in full, on the basis of currently existing facts, conditions, and values, highly questionable and improbable. An asset classified Loss is considered uncollectible and has such little value that its continuance as a bankable asset is not warranted. The credit risk profile by internally assigned grade for loans was as follows: March 31, 2018 December 31, 2017 (in thousands) Commercial real estate Commercial construction Commercial Commercial real estate Commercial construction Commercial Grade: Pass $ 667,555 $ 89,802 $ 518,819 $ 630,877 $ 83,757 $ 492,942 Special mention 46,283 22,500 27,876 49,347 22,500 27,997 Substandard 52,684 2,233 21,676 52,882 2,016 23,421 Doubtful — — — — — 468 Loss — — — — — — Total $ 766,522 $ 114,535 $ 568,371 $ 733,106 $ 108,273 $ 544,828 The credit risk profile based on payment activity for loans was as follows: (in thousands) 30-59 days past due 60-89 days past due Greater than 90 days Total past due Current Total financing receivables Recorded investment> 90 days and accruing March 31, 2018 Real estate: Residential 1-4 family $ 1,902 $ 662 $ 4,605 $ 7,169 $ 2,108,952 $ 2,116,121 $ — Commercial real estate — — — — 766,522 766,522 — Home equity line of credit 1,943 1,350 2,121 5,414 909,527 914,941 — Residential land — — 640 640 15,929 16,569 — Commercial construction — — — — 114,535 114,535 — Residential construction — — — — 15,363 15,363 — Commercial 344 689 232 1,265 567,106 568,371 — Consumer 2,889 1,523 1,856 6,268 223,990 230,258 — Total loans $ 7,078 $ 4,224 $ 9,454 $ 20,756 $ 4,721,924 $ 4,742,680 $ — December 31, 2017 Real estate: Residential 1-4 family $ 1,532 $ 1,715 $ 5,071 $ 8,318 $ 2,109,729 $ 2,118,047 $ — Commercial real estate — — — — 733,106 733,106 — Home equity line of credit 425 114 2,051 2,590 910,462 913,052 — Residential land 23 — 625 648 15,149 15,797 — Commercial construction — — — — 108,273 108,273 — Residential construction — — — — 14,910 14,910 — Commercial 1,825 2,025 730 4,580 540,248 544,828 — Consumer 3,432 2,159 1,876 7,467 216,097 223,564 — Total loans $ 7,237 $ 6,013 $ 10,353 $ 23,603 $ 4,647,974 $ 4,671,577 $ — The credit risk profile based on nonaccrual loans, accruing loans 90 days or more past due and troubled debt restructuring (TDR) loans was as follows: (in thousands) March 31, 2018 December 31, 2017 Real estate: Residential 1-4 family $ 13,578 $ 12,598 Commercial real estate — — Home equity line of credit 5,049 4,466 Residential land 853 841 Commercial construction — — Residential construction — — Commercial 2,714 3,069 Consumer 2,949 2,617 Total nonaccrual loans $ 25,143 $ 23,591 Real estate: Residential 1-4 family $ — $ — Commercial real estate — — Home equity line of credit — — Residential land — — Commercial construction — — Residential construction — — Commercial — — Consumer — — Total accruing loans 90 days or more past due $ — $ — Real estate: Residential 1-4 family $ 10,874 $ 10,982 Commercial real estate 1,004 1,016 Home equity line of credit 8,467 6,584 Residential land 331 425 Commercial construction — — Residential construction — — Commercial 1,886 1,741 Consumer 65 66 Total troubled debt restructured loans not included above $ 22,627 $ 20,814 The total carrying amount and the total unpaid principal balance of impaired loans were as follows: March 31, 2018 Three months ended March 31, 2018 (in thousands) Recorded investment Unpaid principal balance Related Allowance Average recorded investment Interest income recognized* With no related allowance recorded Real estate: Residential 1-4 family $ 8,673 $ 9,205 $ — $ 8,496 $ 107 Commercial real estate — — — — — Home equity line of credit 1,690 1,982 — 1,700 5 Residential land 1,130 1,429 — 1,168 5 Commercial construction — — — — — Residential construction — — — — — Commercial 2,499 3,411 — 2,357 10 Consumer 7 7 — 7 — $ 13,999 $ 16,034 $ — $ 13,728 $ 127 With an allowance recorded Real estate: Residential 1-4 family $ 9,055 $ 9,258 $ 1,207 $ 9,129 $ 93 Commercial real estate 1,004 1,004 68 1,008 11 Home equity line of credit 8,575 8,619 892 7,741 81 Residential land 54 54 17 77 2 Commercial construction — — — — — Residential construction — — — — — Commercial 1,886 1,886 519 1,957 36 Consumer 58 58 3 58 1 $ 20,632 $ 20,879 $ 2,706 $ 19,970 $ 224 Total Real estate: Residential 1-4 family $ 17,728 $ 18,463 $ 1,207 $ 17,625 $ 200 Commercial real estate 1,004 1,004 68 1,008 11 Home equity line of credit 10,265 10,601 892 9,441 86 Residential land 1,184 1,483 17 1,245 7 Commercial construction — — — — — Residential construction — — — — — Commercial 4,385 5,297 519 4,314 46 Consumer 65 65 3 65 1 $ 34,631 $ 36,913 $ 2,706 $ 33,698 $ 351 December 31, 2017 Three months ended March 31, 2017 (in thousands) Recorded investment Unpaid principal balance Related allowance Average recorded investment Interest income recognized* With no related allowance recorded Real estate: Residential 1-4 family $ 9,097 $ 9,644 $ — $ 9,555 $ 84 Commercial real estate — — — 220 — Home equity line of credit 1,496 1,789 — 2,004 14 Residential land 1,143 1,434 — 957 26 Commercial construction — — — — — Residential construction — — — — — Commercial 2,328 3,166 — 4,907 6 Consumer 8 8 — — — $ 14,072 $ 16,041 $ — $ 17,643 $ 130 With an allowance recorded Real estate: Residential 1-4 family $ 9,187 $ 9,390 $ 1,248 $ 10,048 $ 119 Commercial real estate 1,016 1,016 65 1,300 14 Home equity line of credit 6,692 6,736 647 4,562 49 Residential land 122 122 47 2,076 37 Commercial construction — — — — — Residential construction — — — — — Commercial 2,246 2,252 694 7,268 401 Consumer 58 58 29 30 — $ 19,321 $ 19,574 $ 2,730 $ 25,284 $ 620 Total Real estate: Residential 1-4 family $ 18,284 $ 19,034 $ 1,248 $ 19,603 $ 203 Commercial real estate 1,016 1,016 65 1,520 14 Home equity line of credit 8,188 8,525 647 6,566 63 Residential land 1,265 1,556 47 3,033 63 Commercial construction — — — — — Residential construction — — — — — Commercial 4,574 5,418 694 12,175 407 Consumer 66 66 29 30 — $ 33,393 $ 35,615 $ 2,730 $ 42,927 $ 750 * Since loan was classified as impaired. Troubled debt restructurings. A loan modification is deemed to be a TDR when the borrower is determined to be experiencing financial difficulties and ASB grants a concession it would not otherwise consider. When a borrower experiencing financial difficulty fails to make a required payment on a loan or is in imminent default, ASB takes a number of steps to improve the collectability of the loan and maximize the likelihood of full repayment. At times, ASB may modify or restructure a loan to help a distressed borrower improve its financial position to eventually be able to fully repay the loan, provided the borrower has demonstrated both the willingness and the ability to fulfill the modified terms. TDR loans are considered an alternative to foreclosure or liquidation with the goal of minimizing losses to ASB and maximizing recovery. ASB may consider various types of concessions in granting a TDR including maturity date extensions, extended amortization of principal, temporary deferral of principal payments and temporary interest rate reductions. ASB rarely grants principal forgiveness in its TDR modifications. Residential loan modifications generally involve interest rate reduction, extending the amortization period, or capitalizing certain delinquent amounts owed not to exceed the original loan balance. Land loans at origination are typically structured as a three -year term, interest-only monthly payment with a balloon payment due at maturity. Land loan TDR modifications typically involve extending the maturity date up to five years and converting the payments from interest-only to principal and interest monthly, at the same or higher interest rate. Commercial loan modifications generally involve extensions of maturity dates, extending the amortization period and temporary deferral or reduction of principal payments. ASB generally does not reduce the interest rate on commercial loan TDR modifications. Occasionally, additional collateral and/or guaranties are obtained. All TDR loans are classified as impaired and are segregated and reviewed separately when assessing the adequacy of the allowance for loan losses based on the appropriate method of measuring impairment: (1) present value of expected future cash flows discounted at the loan’s effective original contractual rate, (2) fair value of collateral less cost to sell or (3) observable market price. The financial impact of the calculated impairment amount is an increase to the allowance associated with the modified loan. When available information confirms that specific loans or portions thereof are uncollectible (confirmed losses), these amounts are charged off against the allowance for loan losses. Loan modifications that occurred during the first quarters of 2018 and 2017 and the impact on the allowance for loan losses were as follows: Three months ended March 31, 2018 Number of contracts Outstanding recorded investment 1 Net increase in allowance (dollars in thousands) Pre-modification Post-modification (as of period end) Troubled debt restructurings Real estate: Residential 1-4 family 1 $ 339 $ 344 $ 16 Commercial real estate — — — — Home equity line of credit 18 2,170 2,174 388 Residential land 1 109 109 — Commercial construction — — — — Residential construction — — — — Commercial 5 2,251 2,251 — Consumer — — — — 25 $ 4,869 $ 4,878 $ 404 Three months ended March 31, 2017 Number of contracts Outstanding recorded 1 Net increase in allowance (dollars in thousands) Pre-modification Post-modification (as of period end) Troubled debt restructurings Real estate: Residential 1-4 family 3 $ 512 $ 520 $ 45 Commercial real estate — — — — Home equity line of credit 8 226 212 34 Residential land — — — — Commercial construction — — — — Residential construction — — — — Commercial 1 342 342 — Consumer 1 59 59 27 13 $ 1,139 $ 1,133 $ 106 1 The reported balances include loans that became TDR during the period, and were fully paid-off, charged-off, or sold prior to period end. Loans modified in TDRs that experienced a payment default of 90 days or more during the first quarters of 2018 and 2017 , and for which the payment of default occurred within one year of the modification, were as follows: Three months ended March 31, 2018 Three months ended March 31, 2017 (dollars in thousands) Number of contracts Recorded investment Number of contracts Recorded investment Troubled debt restructurings that subsequently defaulted Real estate: Residential 1-4 family 1 $ 49 1 $ 301 Commercial real estate — — — — Home equity line of credit 1 86 — — Residential land — — — — Commercial construction — — — — Residential construction — — — — Commercial — — — — Consumer — — — — 2 $ 135 1 $ 301 If loans modified in a TDR subsequently default, ASB evaluates the loan for further impairment. Based on its evaluation, adjustments may be made in the allocation of the allowance or partial charge-offs may be taken to further write-down the carrying value of the loan. Commitments to lend additional funds to borrowers whose loan terms have been modified in a TDR totaled nil at March 31, 2018 and December 31, 2017 . The Company had $4.0 million and $4.3 million of consumer mortgage loans collateralized by residential real estate property that were in the process of foreclosure at March 31, 2018 and December 31, 2017 , respectively. Mortgage servicing rights . In its mortgage banking business, ASB sells residential mortgage loans to government-sponsored entities and other parties, who may issue securities backed by pools of such loans. ASB retains no beneficial interests in these loans other than the servicing rights of certain loans sold. ASB received proceeds from the sale of residential mortgages of $33.1 million and $40.6 million for the three months ended March 31, 2018 and 2017 , respectively, and recognized gains on such sales of $0.6 million and $0.8 million for the three months ended March 31, 2018 and 2017 , respectively. There were no repurchased mortgage loans for the three months ended March 31, 2018 and 2017 . The repurchase reserve was $0.1 million as of March 31, 2018 and 2017 . Mortgage servicing fees, a component of other income, net, were $0.7 million and $0.8 million for the three months ended March 31, 2018 and 2017 , respectively. Changes in the carrying value of mortgage servicing rights were as follows: (in thousands) Gross 1 Accumulated amortization 1 Valuation allowance Net March 31, 2018 $ 17,846 $ (9,305 ) $ — $ 8,541 December 31, 2017 17,511 (8,872 ) — 8,639 1 Reflects the impact of loans paid in full. Changes related to mortgage servicing rights were as follows: Three months ended March 31 (in thousands) 2018 2017 Mortgage servicing rights Beginning balance $ 8,639 $ 9,373 Amount capitalized 335 436 Amortization (433 ) (515 ) Other-than-temporary impairment — — Carrying amount before valuation allowance 8,541 9,294 Valuation allowance for mortgage servicing rights Beginning balance — — Provision (recovery) — — Other-than-temporary impairment — — Ending balance — — Net carrying value of mortgage servicing rights $ 8,541 $ 9,294 ASB capitalizes mortgage servicing rights (MSRs) acquired upon the sale of mortgage loans with servicing rights retained. On a monthly basis, ASB compares the net carrying value of the mortgage servicing rights to its fair value to determine if there are any changes to the valuation allowance and/or other-than-temporary impairment for the mortgage servicing rights. ASB’s MSRs are stratified based on predominant risk characteristics of the underlying loans including loan type such as fixed-rate 15 and 30 year mortgages and note rate in bands of 50 to 100 basis points. For each stratum, fair value is calculated by discounting expected net income streams using discount rates that reflect industry pricing for similar assets. Changes in mortgage interest rates impact the value of ASB’s mortgage servicing rights. Rising interest rates typically result in slower prepayment speeds in the loans being serviced for others, which increases the value of mortgage servicing rights, whereas declining interest rates typically result in faster prepayment speeds which decrease the value of mortgage servicing rights and increase the amortization of the mortgage servicing rights. Expected net income streams are estimated based on industry assumptions regarding prepayment expectations and income and expenses associated with servicing residential mortgage loans for others. ASB uses a present value cash flow model using techniques described above to estimate the fair value of MSRs. Impairment is recognized through a valuation allowance for each stratum when the carrying amount exceeds fair value, with any associated provision recorded as a component of loan servicing fees included in “Revenues - bank” in the consolidated statements of income. A direct write-down is recorded when the recoverability of the valuation allowance is deemed to be unrecoverable. 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 sensitivity analysis of fair value of MSRs to hypothetical adverse changes of 25 and 50 basis points in certain key assumptions was as follows: (dollars in thousands) March 31, 2018 December 31, 2017 Prepayment rate: 25 basis points adverse rate change $ (378 ) $ (869 ) 50 basis points adverse rate change (883 ) (1,828 ) Discount rate: 25 basis points adverse rate change (127 ) (111 ) 50 basis points adverse rate change (252 ) (220 ) The effect of a variation in certain assumptions on fair value is calculated without changing any other assumptions. This analysis typically cannot be extrapolated because the relationship of a change in one key assumption to the changes in the fair value of MSRs typically is not linear. Other borrowings. Securities sold under agreements to repurchase are accounted for as financing transactions and the obligations to repurchase these securities are recorded as liabilities in the condensed consolidated balance sheets. ASB pledges investment securities as collateral for securities sold under agreements to repurchase. All such agreements are subject to master netting arrangements, which provide for a conditional right of set-off in case of default by either party; however, ASB presents securities sold under agreements to repurchase on a gross basis in the balance sheet. The following tables present information about the securities sold under agreements to repurchase, including the related collateral received from or pledged to counterparties: (in millions) Gross amount of recognized liabilities Gross amount offset in the Balance Sheet Net amount of liabilities presented in the Balance Sheet Repurchase agreements March 31, 2018 $ 50 $ — $ 50 December 31, 2017 141 — 141 Gross amount not offset in the Balance Sheet (in millions) Net amount of liabilities presented in the Balance Sheet Financial instruments Cash collateral pledged March 31, 2018 Commercial account holders $ 50 $ 97 $ — Total $ 50 $ 97 $ — December 31, 2017 Commercial account holders $ 141 $ 165 $ — Total $ 141 $ 165 $ — The securities underlying the agreements to repurchase are book-entry securities and were delivered by appropriate entry into the counterparties’ accounts or into segregated tri-party custodial accounts at the FHLB. The securities underlying the agreements to repurchase continue to be reflected in ASB’s asset accounts. Derivative financial instruments. ASB enters into interest rate lock commitments (IRLCs) with borrowers, and forward commitments to sell loans or to-be-announced mortgage-backed securities to investors to hedge against the inherent interest rate and pricing risks associated with selling loans. ASB enters into IRLCs for residential mortgage loans, which commit ASB to lend funds to a potential borrower at a specific interest rate and within a specified period of time. IRLCs that relate to the origination of mortgage loans that will be held for sale are considered derivative financial instruments under applicable accounting guidance. Outstanding IRLCs expose ASB to the risk that the price of the mortgage loans underlying the commitments may decline due to increases in mortgage interest rates from inception of the rate lock to the funding of the loan. The IRL

Credit agreements

Credit agreements	3 Months Ended
	Mar. 31, 2018
Debt Disclosure [Abstract]
Credit agreements	Credit agreements Credit agreements. HEI and Hawaiian Electric each entered into a separate agreement with a syndicate of eight financial institutions (the HEI Facility and Hawaiian Electric Facility, respectively, and together, the Facilities), effective July 3, 2017, to amend and restate their respective previously existing revolving unsecured credit agreements. The $150 million HEI Facility extended the term of the facility to June 30, 2022. In March 2018, the PUC approved Hawaiian Electric’s request to extend the term of the $200 million Hawaiian Electric Facility to June 30, 2022. As of March 31, 2018 and December 31, 2017 , no amounts were outstanding under the Facilities. The Facilities will be maintained to support each company’s respective short-term commercial paper program, but may be drawn on to meet each company’s respective working capital needs and general corporate purposes.

Shareholders' equity

Shareholders' equity	3 Months Ended
	Mar. 31, 2018
Equity [Abstract]
Shareholders' equity	Shareholders’ equity Accumulated other comprehensive income/(loss) . Changes in the balances of each component of accumulated other comprehensive income/(loss) (AOCI) were as follows: HEI Consolidated Hawaiian Electric Consolidated (in thousands) Net unrealized gains (losses) on securities Unrealized gains (losses) on derivatives Retirement benefit plans AOCI Unrealized gains (losses) on derivatives Retirement benefit plans AOCI Balance, December 31, 2017 $ (14,951 ) $ — $ (26,990 ) $ (41,941 ) $ — $ (1,219 ) $ (1,219 ) Current period other comprehensive income (loss) (13,297 ) — 524 (12,773 ) — 31 31 Balance, March 31, 2018 $ (28,248 ) $ — $ (26,466 ) $ (54,714 ) $ — $ (1,188 ) $ (1,188 ) Balance, December 31, 2016 $ (7,931 ) $ (454 ) $ (24,744 ) $ (33,129 ) $ (454 ) $ 132 $ (322 ) Current period other comprehensive income 223 454 308 985 454 5 459 Balance, March 31, 2017 $ (7,708 ) $ — $ (24,436 ) $ (32,144 ) $ — $ 137 $ 137 Reclassifications out of AOCI were as follows: Amount reclassified from AOCI Three months ended March 31 Affected line item in the (in thousands) 2018 2017 Statements of Income / Balance Sheets HEI consolidated Derivatives qualifying as cash flow hedges: Window forward contracts $ — $ 454 Property, plant and equipment-electric utilities Retirement benefit plans: Amortization of prior service credit and net losses recognized during the period in net periodic benefit cost 5,146 3,921 See Note 8 for additional details Impact of D&Os of the PUC included in regulatory assets (4,622 ) (3,613 ) See Note 8 for additional details Total reclassifications $ 524 $ 762 Hawaiian Electric consolidated Derivatives qualifying as cash flow hedges: Window forward contracts $ — $ 454 Property, plant and equipment Retirement benefit plans: Amortization of prior service credit and net losses recognized during the period in net periodic benefit cost 4,653 3,618 See Note 8 for additional details Impact of D&Os of the PUC included in regulatory assets (4,622 ) (3,613 ) See Note 8 for additional details Total reclassifications $ 31 $ 459

Revenues

Revenues	3 Months Ended
	Mar. 31, 2018
Revenue from Contract with Customer [Abstract]
Revenues	Revenues Adoption of ASU No. 2014-09, “Revenue from Contracts with Customers (Topic 606).” In the first quarter of 2018, the Company and Hawaiian Electric adopted ASU No. 2014-09, “Revenue from Contracts with Customers (Topic 606),” using the modified retrospective method. Results for reporting periods beginning after January 1, 2018 are presented under Topic 606, while prior period amounts are not adjusted and continue to be reported in accordance with accounting standards in effect for those periods. The adoption of Topic 606 had no significant impact on the timing or pattern of revenue recognition for the Company or Hawaiian Electric. No practical expedients were used by the Company or Hawaiian Electric in the adoption of ASU No. 2014-09. Revenue from contracts with customers. The revenues subject to Topic 606 include the Utilities’ electric energy sales revenue and the Utilities’ and ASB’s transaction fees, as further described below. Electric Utilities . Electric energy sales and fees under tariff . Electric energy sales represent revenues from the generation and transmission of electricity to customers and utility fees include transaction-based fees associated with the delivery of electricity provided by the Utilities under tariffs approved by the PUC. Electric energy sales under tariff - Transaction pricing for electricity is determined and approved by the PUC for each rate class and includes revenues from the base electric charges, which are composed of (1) the customer, demand, energy, and minimum charges, and (2) the power factor, service voltage, and other adjustments as provided in each rate and rate rider schedule. The Utilities satisfy performance obligations over time, i.e., the Utilities generate and transfer control of the electricity over time as the customer simultaneously receives and consumes the benefits provided by the Utilities' performance. Payments from customers are generally due within 30 days from the end of the billing period. Utility fees - Pricing for transaction fees associated with electric service are set and approved by the PUC. Adjustments to the fee schedules are either requested by the Utilities during ratemaking years or during off cycle periods as needed. Such transaction fees include connection fees, late payment fees and other one-time transaction fees. These transaction-based fees are recognized at the point in time when the transaction has occurred and the performance obligation satisfied (e.g., connection fees are recognized when an electric connection is completed). Bank . Bank fees. Bank fees are primarily transaction-based and are recognized when the transaction has occurred and the performance obligation satisfied. From time to time, customers will request a fee waiver and ASB may grant reversals of fees. Revenues are not recorded for the estimated amount of fee reversals for each period. Under the new standard, certain fees paid to third parties that were previously recognized as a component of noninterest expense are now netted with fee income. The change in presentation will have no effect on the reported amount of operating income. Fees from other financial services - These fees primarily include debit card interchange income and fees, automated teller machine fees, credit card interchange income and fees, check ordering fees, wire fees, safe deposit rental fees, corporate/business fees, merchant income, online banking fees and international banking fees. Amounts paid to third parties for payment network expenses are included in this financial statement caption in ASB’s Statements of Income Data (in Revenues—Bank financial statement caption of HEI’s Consolidated Statements of Income). Previously, these expenses were recorded in the other expense financial statement caption of ASB’s Statements of Income Data (in Expenses—Bank financial statement caption of HEI’s Consolidated Statements of Income). Fee income on deposit liabilities - These fees primarily include “not sufficient funds” fees, monthly deposit account service charge fees, commercial account analysis fees and other deposit fees. Fee income on other financial products - These fees primarily include commission income from the sales of annuity, mutual fund, and life insurance products. In 2017, ASB began offering a fee based, managed account product in which income is based on a percentage of assets under management. ASB satisfies its performance obligations under the managed account arrangement over time, and consequently, fees for assets under management are recognized over time as the customer simultaneously receives and consumes the benefit of asset management services. The managed account product is still in the preliminary stages and fees recognized are minimal. Revenues from other sources. Revenues from other sources not subject to Topic 606 are accounted for as follows: Electric Utilities . Regulatory revenues . Regulatory revenues primarily consist of revenues from decoupling mechanism, cost recovery surcharges and the Tax Act adjustments. Decoupling mechanism - Under the decoupling mechanism, the Utilities are allowed to recover or refund the difference between actual revenue and the target revenue as determined by the PUC. These adjustments will be reflected in tariffs in future periods. Cost recovery surcharges - For the timely recovery of additional costs incurred, and reconciliation of costs and expenses included in tariffed rates, the Utilities recognize revenues under surcharges mechanisms approved by the PUC. These will be reflected in tariffs in future periods (e.g., ECAC and PPAC). Tax Act adjustments - These represent adjustments to revenues for the amounts included in tariffed revenues that will be returned to customers as a result of the Tax Act. Since revenue adjustments discussed above resulted from either agreements with the PUC or change in tax law, rather than contracts with customers, they are not subject to the scope of Topic 606. See Notes 1, 3 and 10 to the audited consolidated financial statements in the Company’s Form 10-K for the year ended December 31, 2017. Bank . Interest and dividend income . Interest and fees on loans are recognized in accordance with ASC Topic 310, Receivables , including the related allowance for loan losses. Interest and dividends on investment securities are recognized in accordance with ASC Topic 320, Investments-Debt and Equity Securities. See Notes 1 and 4 to the audited consolidated financial statements in the Company’s Form 10-K for the year ended December 31, 2017. Other bank noninterest income . Other bank noninterest income primarily consists of mortgage banking income and bank-owned life insurance income. Mortgage banking income - Mortgage banking income consists primarily of realized and unrealized gains on sale of loans accounted for pursuant to ASC Topic 860, Transfers and Servicing . Interest rate lock commitments and forward loan sales are considered derivatives and are accounted pursuant to ASC Topic 815, Derivatives and Hedging . Bank-Owned Life Insurance (BOLI) - The recognition of BOLI cash surrender value does not represent a contract with a customer and is accounted for in accordance with Emerging Issues Task Force Issue 06-05, Accounting for Purchases of Life Insurance-Determining the Amount that Could be Realized in Accordance with FASB Technical Bulletin No. 85-4, Accounting for Purchases of Life Insurance . Revenue disaggregation. The following tables disaggregates revenues by major source, timing of revenue recognition, and segment: Three months ended March 31, 2018 Electric utility Bank Other Total (in thousands) Revenues from contracts with customers Electric energy sales - residential $ 178,589 $ — $ — $ 178,589 Electric energy sales - commercial 188,998 — — 188,998 Electric energy sales - large light and power 192,321 — — 192,321 Electric energy sales - other 3,263 — — 3,263 Utility fees 797 — — 797 Bank fees — 11,497 — 11,497 Total revenues from contracts with customers 563,968 11,497 — 575,465 Revenues from other sources Regulatory revenue 4,750 — — 4,750 Bank interest and dividend income — 62,002 — 62,002 Other bank noninterest income — 1,920 — 1,920 Other 1,709 — 28 1,737 Total revenues from other sources 6,459 63,922 28 70,409 Total revenues $ 570,427 $ 75,419 $ 28 $ 645,874 Timing of revenue recognition Services/goods transferred at a point in time $ 797 $ 11,497 $ — $ 12,294 Services/goods transferred over time 563,171 — — 563,171 Total revenues from contracts with customers $ 563,968 $ 11,497 $ — $ 575,465 There are no material contract assets or liabilities associated with revenues from contracts with customers existing at the beginning or at the end of the first quarter ended March 31, 2018. Accounts receivable and unbilled revenues related to contracts with customers represent an unconditional right to consideration since all performance obligations have been satisfied. These amounts are disclosed as accounts receivable and unbilled revenues, net on HEI’s condensed consolidated balance sheets and customer accounts receivable, net and accrued unbilled revenues, net on Hawaiian Electric’s condensed consolidated balance sheets. As of March 31, 2018, the Company had no material remaining performance obligations due to the nature of the Company’s contracts with its customers. For the Utilities, performance obligations are fulfilled as electricity is delivered to customers. For the bank, fees are recognized when a transaction is completed.

Retirement benefits

Retirement benefits	3 Months Ended
	Mar. 31, 2018
Compensation and Retirement Disclosure [Abstract]
Retirement benefits	Retirement benefits Defined benefit pension and other postretirement benefit plans information. For the first three months of 2018 , the Company contributed $16 million ( $15 million by the Utilities) to its pension and other postretirement benefit plans, compared to $17 million ( $17 million by the Utilities) in the first three months of 2017 . The Company’s current estimate of contributions to its pension and other postretirement benefit plans in 2018 is $62 million ( $61 million by the Utilities, $ 1 million by HEI and nil by ASB), compared to $67 million ($ 66 million by the Utilities, $1 million by HEI and nil by ASB) in 2017 . In addition, the Company expects to pay directly $3 million ( $1 million by the Utilities) of benefits in 2018 , compared to $1 million ( $0.5 million by the Utilities) paid in 2017 . The components of NPPC and NPBC for HEI consolidated and Hawaiian Electric consolidated were as follows: Three months ended March 31 Pension benefits Other benefits (in thousands) 2018 2017 2018 2017 HEI consolidated Service cost $ 17,113 $ 16,494 $ 669 $ 840 Interest cost 19,234 20,216 1,931 2,411 Expected return on plan assets (27,254 ) (25,721 ) (3,192 ) (3,066 ) Amortization of net prior service gain (10 ) (14 ) (452 ) (449 ) Amortization of net actuarial loss (gain) 7,395 6,513 (2 ) 366 Net periodic pension/benefit cost (return) 16,478 17,488 (1,046 ) 102 Impact of PUC D&Os 2,657 (5,156 ) 1,071 146 Net periodic pension/benefit cost (adjusted for impact of PUC D&Os) $ 19,135 $ 12,332 $ 25 $ 248 Hawaiian Electric consolidated Service cost $ 16,673 $ 16,094 $ 664 $ 835 Interest cost 17,710 18,589 1,859 2,327 Expected return on plan assets (25,607 ) (24,011 ) (3,140 ) (3,017 ) Amortization of net prior service loss (gain) 2 2 (451 ) (451 ) Amortization of net actuarial loss 6,710 6,006 — 359 Net periodic pension/benefit cost (return) 15,488 16,680 (1,068 ) 53 Impact of PUC D&Os 2,657 (5,156 ) 1,071 146 Net periodic pension/benefit cost (adjusted for impact of PUC D&Os) $ 18,145 $ 11,524 $ 3 $ 199 HEI consolidated recorded retirement benefits expense of $12 million ($ 11 million by the Utilities) and $9 million ( $8 million by the Utilities) in the first three months of 2018 and 2017 , respectively, and charged the remaining net periodic benefit cost primarily to electric utility plant. The Utilities have implemented pension and OPEB tracking mechanisms under which all of their retirement benefit expenses (except for executive life and nonqualified pension plan expenses) determined in accordance with GAAP are recovered over time. Under the tracking mechanisms, these retirement benefit costs that are over/under amounts allowed in rates are charged/credited to a regulatory asset/liability. The regulatory asset/liability for each utility will be amortized over 5 years beginning with the issuance of the PUC’s D&O in the respective utility’s next rate case. Defined contribution plans information. For the first three months of 2018 and 2017 , the Company’s expenses for its defined contribution pension plans under the Hawaiian Electric Industries Retirement Savings Plan (HEIRSP) and the ASB 401(k) Plan were $1.6 million and $1.5 million , respectively, and cash contributions were $3.7 million and $2.9 million , respectively. For the first three months of 2018 and 2017 , the Utilities’ expenses for its defined contribution pension plan under the HEIRSP were $ 0.5 million , and cash contributions were $ 0.5 million .

Share-based compensation

Share-based compensation	3 Months Ended
	Mar. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share-based compensation	Share-based compensation Under the 2010 Equity and Incentive Plan, as amended, HEI can issue shares of common stock as incentive compensation to selected employees in the form of stock options, stock appreciation rights, restricted shares, restricted stock units, performance shares and other share-based and cash-based awards. The 2010 Equity and Incentive Plan (original EIP) was amended and restated effective March 1, 2014 (EIP) and an additional 1.5 million shares were added to the shares available for issuance under these programs. As of March 31, 2018 , approximately 3.2 million shares remained available for future issuance under the terms of the EIP, assuming recycling of shares withheld to satisfy minimum statutory tax liabilities relating to EIP awards, including an estimated 0.6 million shares that could be issued upon the vesting of outstanding restricted stock units and the achievement of performance goals for awards outstanding under long-term incentive plans (assuming that such performance goals are achieved at maximum levels). Under the 2011 Nonemployee Director Stock Plan (2011 Director Plan), HEI can issue shares of common stock as compensation to nonemployee directors of HEI, Hawaiian Electric and ASB. As of March 31, 2018 , there were 84,354 shares remaining available for future issuance under the 2011 Director Plan. Share-based compensation expense and the related income tax benefit were as follows: Three months ended March 31 (in millions) 2018 2017 HEI consolidated Share-based compensation expense 1 $ 1.7 $ 1.1 Income tax benefit 0.2 0.3 Hawaiian Electric consolidated Share-based compensation expense 1 0.6 0.5 Income tax benefit 0.1 0.2 1 For the three months ended March 31, 2018 and 2017, the Company has not capitalized any share-based compensation. Stock awards. HEI granted HEI common stock to nonemployee directors of HEI, Hawaiian Electric and ASB under the 2011 Director Plan as follows: Three months ended March 31 (dollars in thousands) 2018 2017 Shares granted 1,074 770 Fair value $ 39 $ 25 Income tax benefit 10 10 The number of shares issued to each nonemployee director of HEI, Hawaiian Electric and ASB is determined based on the closing price of HEI Common Stock on the grant date. Restricted stock units. Information about HEI’s grants of restricted stock units was as follows: Three months ended March 31 2018 2017 Shares (1) Shares (1) Outstanding, beginning of period 197,047 $ 31.53 220,683 $ 29.57 Granted 88,905 34.10 96,977 33.48 Vested (75,235 ) 30.55 (81,624 ) 28.85 Forfeited (2,629 ) 33.09 — — Outstanding, end of period 208,088 $ 32.97 236,036 $ 31.42 Total weighted-average grant-date fair value of shares granted (in millions) $ 3.0 $ 3.2 (1) Weighted-average grant-date fair value per share based on the average price of HEI common stock on the date of grant. For the first three months of 2018 and 2017 , total restricted stock units and related dividends that vested had a fair value of $2.7 million and $3.1 million , respectively, and the related tax benefits were $0.5 million and $1.1 million , respectively. As of March 31, 2018 , there was $6.1 million of total unrecognized compensation cost related to the nonvested restricted stock units. The cost is expected to be recognized over a weighted-average period of 3.0 years . Long-term incentive plan payable in stock. The 2017-2019 and 2018-2020 long-term incentive plans (LTIP) provide for performance awards under the EIP of shares of HEI common stock based on the satisfaction of performance goals, including a market condition goal. The number of shares of HEI common stock that may be awarded is fixed on the date the grants are made, subject to the achievement of specified performance levels and calculated dividend equivalents. The potential payout varies from 0% to 200% of the number of target shares depending on the achievement of the goals. The market condition goal is based on HEI’s total shareholder return (TSR) compared to the Edison Electric Institute Index over the three -year period. The other performance condition goals relate to EPS growth, return on average common equity (ROACE) and ASB’s efficiency ratio. The 2016-2018 LTIP provides for performance awards payable in cash, and thus is not included in the tables below. LTIP linked to TSR . Information about HEI’s LTIP grants linked to TSR was as follows: Three months ended March 31 2018 2017 Shares (1) Shares (1) Outstanding, beginning of period 32,904 $ 39.51 83,106 $ 22.95 Granted 35,626 38.21 36,971 39.51 Vested (issued or unissued and cancelled) — — (83,106 ) 22.95 Forfeited (1,739 ) 38.83 — — Outstanding, end of period 66,791 $ 38.84 36,971 $ 39.51 Total weighted-average grant-date fair value of shares granted (in millions) $ 1.4 $ 1.5 (1) Weighted-average grant-date fair value per share determined using a Monte Carlo simulation model. The grant date fair values of the shares were determined using a Monte Carlo simulation model utilizing actual information for the common shares of HEI and its peers for the period from the beginning of the performance period to the grant date and estimated future stock volatility and dividends of HEI and its peers over the remaining three -year performance period. The expected stock volatility assumptions for HEI and its peer group were based on the three -year historic stock volatility, and the annual dividend yield assumptions were based on dividend yields calculated on the basis of daily stock prices over the same three -year historical period. The following table summarizes the assumptions used to determine the fair value of the LTIP awards linked to TSR and the resulting fair value of LTIP awards granted: 2018 2017 Risk-free interest rate 2.29 % 1.46 % Expected life in years 3 3 Expected volatility 17.0 % 20.1 % Range of expected volatility for Peer Group 15.1% to 26.2% 15.4% to 26.0% Grant date fair value (per share) $38.20 $39.51 For the three months ended March 31, 2017 , total vested LTIP awards linked to TSR and related dividends had a fair value of $1.9 million and the related tax benefits were $0.7 million . As of March 31, 2018 , there was $2.0 million of total unrecognized compensation cost related to the nonvested performance awards payable in shares linked to TSR. The cost is expected to be recognized over a weighted-average period of 2.3 years . LTIP awards linked to other performance conditions . Information about HEI’s LTIP awards payable in shares linked to other performance conditions was as follows: Three months ended March 31 2018 2017 Shares (1) Shares (1) Outstanding, beginning of period 131,616 $ 33.47 109,816 $ 25.18 Granted 142,509 34.10 147,888 33.48 Vested — — (109,816 ) 25.18 Forfeited (6,958 ) 33.81 — — Outstanding, end of period 267,167 $ 33.80 147,888 $ 33.48 Total weighted-average grant-date fair value of shares granted (at target performance levels) (in millions) $ 4.9 $ 5.0 (1) Weighted-average grant-date fair value per share based on the average price of HEI common stock on the date of grant. For the three months ended March 31, 2017 , total vested LTIP awards linked to other performance conditions and related dividends had a fair value of $4.2 million and the related tax benefits were $1.6 million . As of March 31, 2018 , there was $6.9 million of total unrecognized compensation cost related to the nonvested shares linked to performance conditions other than TSR. The cost is expected to be recognized over a weighted-average period of 2.3 years .

Income taxes

Income taxes	3 Months Ended
	Mar. 31, 2018
Income Tax Disclosure [Abstract]
Income taxes	Income taxes Staff Accounting Bulletin No. 118 (SAB No. 118). On December 22, 2017, the SEC staff issued SAB No. 118 to address the application of GAAP in situations when a registrant does not have the necessary information available, prepared, or analyzed (including computations) in reasonable detail to complete the accounting for certain income tax effects of the Tax Act. In 2017, the Company calculated its best estimate in accordance with its understanding of the law and available guidance. As of March 31, 2018, there were no adjustments made to provisional tax impacts previously recognized in the Company’s and Utilities financial statements. The provisional impacts will be updated when and if additional information is received as a result of changes in the Company and Utilities interpretations and assumptions, the issuance of Internal Revenue Service and Joint Committee on Taxation guidance, and actions the Company and Utilities may take as a result of the Tax Act. The provisional tax impacts will be finalized by the end of 2018.

Cash flows

Cash flows	3 Months Ended
	Mar. 31, 2018
Supplemental Cash Flow Elements [Abstract]
Cash flows	Cash flows Three months ended March 31 2018 2017 (in millions) Supplemental disclosures of cash flow information HEI consolidated Interest paid to non-affiliates $ 19 $ 19 Income taxes paid (including refundable credits) 3 4 Hawaiian Electric consolidated Interest paid to non-affiliates 12 13 Income taxes paid (including refundable credits) 5 2 Supplemental disclosures of noncash activities HEI consolidated Property, plant and equipment Estimated fair value of noncash contributions in aid of construction (investing) 3 — Unpaid invoices and accruals for capital expenditures, balance, end of period (investing) 48 27 Loans transferred from held for investment to held for sale (investing) 1 9 Common stock issued (gross) for director and executive/management compensation (financing) 1 3 9 Transfer of retail repurchase agreements to deposit liabilities (financing) 102 — Hawaiian Electric consolidated Electric utility property, plant and equipment Estimated fair value of noncash contributions in aid of construction (investing) 3 — Unpaid invoices and accruals for capital expenditures, balance, end of period (investing) 29 26 1 The amounts shown represent the market value of common stock issued for director and executive/management compensation and withheld to satisfy statutory tax liabilities.

Fair value measurements

Fair value measurements	3 Months Ended
	Mar. 31, 2018
Fair Value Disclosures [Abstract]
Fair value measurements	Fair value measurements Fair value measurement and disclosure valuation methodology. The following are descriptions of the valuation methodologies used for assets and liabilities recorded at fair value and for estimating fair value for financial instruments not carried at fair value: Short-term borrowings—other than bank . The carrying amount of short-term borrowings approximated fair value because of the short maturity of these instruments. Investment securities . The fair value of ASB’s investment securities is determined quarterly through pricing obtained from independent third-party pricing services or from brokers not affiliated with the trade. Non-binding broker quotes are infrequent and generally occur for new securities that are settled close to the month-end pricing date. The third-party pricing vendors ASB uses for pricing its securities are reputable firms that provide pricing services on a global basis and have processes in place to ensure quality and control. The third-party pricing services use a variety of methods to determine the fair value of securities that fall under Level 2 of ASB’s fair value measurement hierarchy. Among the considerations are quoted prices for similar securities in an active market, yield spreads for similar trades, adjustments for liquidity, size, collateral characteristics, historic and generic prepayment speeds, and other observable market factors. To enhance the robustness of the pricing process, ASB will on a quarterly basis compare its standard third-party vendor’s price with that of another third-party vendor. If the prices are within an acceptable tolerance range, the price of the standard vendor will be accepted. If the variance is beyond the tolerance range, an evaluation will be conducted by ASB and a challenge to the price may be made. Fair value in such cases will be based on the value that best reflects the data and observable characteristics of the security. In all cases, the fair value used will have been independently determined by a third-party pricing vendor or non-affiliated broker. The fair value of the mortgage revenue bond is estimated using a discounted cash flow model to calculate the present value of future principal and interest payments and, therefore is classified within Level 3 of the valuation hierarchy. Loans held for sale . Residential and commercial loans are carried at the lower of cost or market and are valued using market observable pricing inputs, which are derived from third party loan sales and, therefore, are classified within Level 2 of the valuation hierarchy. Loans held for investment . Fair value of loans held for investment is derived using a discounted cash flow approach which includes an evaluation of the underlying loan characteristics. The valuation model uses loan characteristics which includes product type, maturity dates and the underlying interest rate of the portfolio. This information is input into the valuation models along with various forecast valuation assumptions including prepayment forecasts, to determine the discount rate. These assumptions are derived from internal and third party sources. Since the valuation is derived from model-based techniques, ASB includes loans held for investment within Level 3 of the valuation hierarchy. Impaired loans . At the time a loan is considered impaired, it is valued at the lower of cost or fair value. Fair value is determined primarily by using an income, cost or market approach and is normally provided through appraisals. Impaired loans carried at fair value generally receive specific allocations within the allowance for loan losses. For collateral-dependent loans, fair value is commonly based on recent real estate appraisals. These appraisals may utilize a single valuation approach or a combination of approaches including comparable sales and the income approach. Adjustments are routinely made in the appraisal process by the independent appraisers to adjust for differences between the comparable sales and income data available. Such adjustments typically result in a Level 3 classification of the inputs for determining fair value. Non-real estate collateral may be valued using an appraisal, net book value per the borrower’s financial statements, or aging reports, adjusted or discounted based on management’s historical knowledge, changes in market conditions from the time of the valuation and management’s expertise and knowledge of the client and client’s business, resulting in a Level 3 fair value classification. Generally, impaired loans are evaluated quarterly for additional impairment and adjusted accordingly. Real estate acquired in settlement of loans . Foreclosed assets are carried at fair value (less estimated costs to sell) and are generally based upon appraisals or independent market prices that are periodically updated subsequent to classification as real estate owned. Such adjustments typically result in a Level 3 classification of the inputs for determining fair value. ASB estimates the fair value of collateral-dependent loans and real estate owned using the sales comparison approach. Mortgage servicing rights . Mortgage servicing rights (MSRs) are capitalized at fair value based on market data at the time of sale and accounted for in subsequent periods at the lower of amortized cost or fair value. Mortgage servicing rights are evaluated for impairment at each reporting date. ASB's MSRs are stratified based on predominant risk characteristics of the underlying loans including loan type and note rate. For each stratum, fair value is calculated by discounting expected net income streams using discount rates that reflect industry pricing for similar assets. Expected net income streams are estimated based on industry assumptions regarding prepayment expectations and income and expenses associated with servicing residential mortgage loans for others. Impairment is recognized through a valuation allowance for each stratum when the carrying amount exceeds fair value, with any associated provision recorded as a component of loan servicing fees included in "Revenues - bank" in the consolidated statements of income. A direct write-down is recorded when the recoverability of the valuation allowance is deemed to be unrecoverable. ASB compares the fair value of MSRs to an estimated value calculated by an independent third-party. The third-party relies on both published and unpublished sources of market related assumptions and their own experience and expertise to arrive at a value. ASB uses the third-party value only to assess the reasonableness of its own estimate. Deposit liabilities . Includes only fixed-maturity certificates of deposit beginning in 2018. The fair value of fixed-maturity certificates of deposit was estimated by discounting the future cash flows using the rates currently offered for deposits of similar remaining maturities. Other borrowings . For fixed-rate advances and repurchase agreements, fair value is estimated using quantitative discounted cash flow models that require the use of interest rate inputs that are currently offered for advances and repurchase agreements of similar remaining maturities. The majority of market inputs are actively quoted and can be validated through external sources, including broker market transactions and third party pricing services. Long-term debt—other than bank . Fair value of long-term debt of HEI and the Utilities was obtained from third-party financial services providers based on the current rates offered for debt of the same or similar remaining maturities and from discounting the future cash flows using the current rates offered for debt of the same or similar risks, terms, and remaining maturities. Interest rate lock commitments (IRLCs) . The estimated fair value of commitments to originate residential mortgage loans for sale is based on quoted prices for similar loans in active markets. IRLCs are classified as Level 2 measurements. Forward sales commitments . To be announced (TBA) mortgage-backed securities forward commitments are classified as Level 1, and consist of publicly-traded debt securities for which identical fair values can be obtained through quoted market prices in active exchange markets. The fair values of ASB’s best efforts and mandatory delivery loan sale commitments are determined using quoted prices in the market place that are observable and are classified as Level 2 measurements. Window forward contracts . The estimated fair value of the Utilities’ window forward contracts was obtained from a third-party financial services provider based on the effective exchange rate offered for the foreign currency denominated transaction. Window forward contracts are classified as Level 2 measurements. 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. Fair value measurements 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. There were no transfers of financial assets and liabilities between Level 1 and Level 2 of the fair value hierarchy during the three months ended March 31, 2018 . 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 ASB holds one mortgage revenue bond issued by the Department of Budget and Finance of the State of Hawaii. The Company estimates the fair value by using a discounted cash flow model to calculate the present value of estimated future principal and interest payments. The unobservable input used in the fair value measurement is the weighted average discount rate. As of March 31, 2018 , the weighted average discount rate was 3.262% which was derived by incorporating a credit spread over the one month LIBOR rate. Significant increases (decreases) in the weighted average discount rate could result in a significantly lower (higher) fair value measurement. Fair value measurements on a nonrecurring basis. Certain assets and liabilities are measured at fair value on a nonrecurring basis and therefore are not included in the tables above. These measurements primarily result from assets carried at the lower of cost or fair value or from impairment of individual assets. 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 For three months ended March 31, 2018 and 2017 , there were no adjustments to fair value for ASB’s loans held for sale. 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. Significant increases (decreases) in any of those inputs in isolation would result in significantly higher (lower) fair value measurements.

Basis of presentation (Policies

Basis of presentation (Policies)	3 Months Ended
	Mar. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Recent accounting pronouncements	Revenues from contracts with customers . In May 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2014-09, “Revenue from Contracts with Customers (Topic 606).” The core principle of the guidance in ASU No. 2014-09 is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. ASU No. 2014-09 also requires disclosure of the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers. The Company and Hawaiian Electric adopted ASU No. 2014-09 (and subsequently issued revenue-related ASUs, as applicable) in the first quarter of 2018. There was no cumulative effect adjustment and no impact on the timing or pattern of revenue recognition, but ASU No. 2014-09 required changes with respect to the Company’s and Hawaiian Electric’s revenue disclosures. See Note 7 . Financial instruments . In January 2016, the FASB issued ASU No. 2016-01, “Financial Instruments-Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities,” which, among other things: • Requires equity investments (except those accounted for under the equity method of accounting, or those that result in consolidation of the investee) to be measured at fair value with changes in fair value recognized in net income. • Requires public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes. • Requires separate presentation of financial assets and financial liabilities by measurement category and form of financial asset (i.e., securities or loans and receivables). • Eliminates the requirement for public business entities to disclose the method(s) and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost. The Company adopted ASU No. 2016-01 in the first quarter of 2018 and the impact of adoption was not material to the Company’s and Hawaiian Electric’s consolidated financial statements. Cash flows . In August 2016, the FASB issued ASU No. 2016-15, “Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments,” which provides guidance on eight specific cash flow issues - debt prepayment or debt extinguishment costs, settlement of zero-coupon debt instruments or other debt instruments with coupon interest rates that are insignificant in relation to the effective interest rate of the borrowing, contingent consideration payments made after a business combination, proceeds from the settlement of insurance claims, proceeds from the settlement of corporate-owned life insurance policies (including bank-owned life insurance policies), distributions received from equity method investees, beneficial interests in securitization transactions, and separately identifiable cash flows and application of the predominance principle. The Company adopted ASU No. 2016-15 in the first quarter of 2018 using a retrospective transition method and there was no impact from the adoption to the Company’s and Hawaiian Electric’s consolidated statements of cash flows. Restricted cash . In November 2016, the FASB issued ASU No. 2016-18, “Statement of Cash Flows (Topic 230): Restricted Cash,” which requires that a statement of cash flows explain the change during the period in the total of cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. The Company adopted ASU No. 2016-18 in the first quarter of 2018 using a retrospective transition method and the impact of adoption was not material to the Company’s and Hawaiian Electric’s consolidated statements of cash flows. Definition of a Business . In January 2017, the FASB issued ASU No. 2017-01, “Business Combinations—Clarifying the Definition of a Business.” This update clarifies the definition of a business and adds guidance to assist entities with evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. The Company adopted ASU No. 2017-01 in the first quarter of 2018 and the impact of adoption was not material to the Company’s and Hawaiian Electric’s consolidated financial statements. Net periodic pension cost and net periodic postretirement benefit cost . In March 2017, the FASB issued ASU No. 2017-07, “Compensation-Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost,” which requires that an employer report the service cost component in the same line item or items as other compensation costs arising from services rendered by the pertinent employees during the period. It also requires the other components of net periodic pension cost (NPPC) and net periodic postretirement benefit cost (NPBC) as defined in paragraphs 715-30-35-4 and 715-60-35-9 to be presented in the income statement separately from the service cost component and outside a subtotal of income from operations. Additionally, only the service cost component is eligible for capitalization under GAAP, when applicable. The Company adopted ASU No. 2017-07 in the first quarter of 2018: (1) retrospectively for the presentation in the income statement of the service cost component and the other components of NPPC and NPBC, and (2) prospectively for the capitalization in assets of the service cost component of NPPC and NPBC for Hawaiian Electric and its subsidiaries. HEI and ASB do not capitalize pension and OPEB costs. In Settlement Agreements in the 2017 Hawaiian Electric and 2016 Hawaii Electric Light rate cases, Hawaiian Electric and Hawaii Electric Light, respectively, and the Consumer Advocate agreed to the deferral of the non-service cost components of NPPC and NPBC, which would have been capitalized prior to ASU No. 2017-07, as part of the pension tracking mechanism. In the Hawaiian Electric Interim D&O, the PUC did not identify this item for further review, and Hawaiian Electric will follow the Settlement Agreement. Hawaii Electric Light and Maui Electric will follow Hawaiian Electric’s treatment until rates are set in the next rate cases. The treatment under the Settlement Agreement will be followed beginning in 2018 until each utility’s next rate case. In each utility’s next rate case, rates established would include recovery of the deferred non-service cost components and seek to adopt the capitalization policy which reflects the requirements of ASU No. 2017-07 (i.e., only the service cost components of NPPC and NPBC will be capitalized). Thus, the adoption of ASU 2017-07 in the first quarter of 2018 does not have a net income impact. The following table summarizes the impact to the prior period financial statements of the adoption of ASU No. 2017-07: (in thousands) As previously filed Adjustment from adoption of ASU No. 2017-07 As currently reported Three months ended March 31, 2017 HEI Condensed Consolidated Income Statement Expenses Electric utility $ 469,673 $ (1,423 ) $ 468,250 Bank 48,696 (195 ) 48,501 Other 5,331 (258 ) 5,073 Total expenses 523,700 (1,876 ) 521,824 Operating income Electric utility 48,938 1,423 50,361 Bank 24,160 195 24,355 Other (5,236 ) 258 (4,978 ) Total operating income 67,862 1,876 69,738 Retirement defined benefits expense--other than service costs — (1,876 ) (1,876 ) Hawaiian Electric Condensed Consolidated Income Statement Other operation and maintenance 100,240 (1,423 ) 98,817 Total expense 469,673 (1,423 ) 468,250 Operating income 48,938 1,423 50,361 Retirement defined benefits expense--other than service costs — (1,423 ) (1,423 ) Hawaiian Electric Condensed Consolidating Income Statement (in Note 3) Hawaiian Electric (parent only) Other operation and maintenance 67,278 (1,285 ) 65,993 Total expense 333,188 (1,285 ) 331,903 Operating income 29,655 1,285 30,940 Retirement defined benefits expense--other than service costs — (1,285 ) (1,285 ) Hawaii Electric Light Other operation and maintenance 15,516 83 15,599 Total expense 68,497 83 68,580 Operating income 10,485 (83 ) 10,402 Retirement defined benefits expense--other than service costs — 83 83 Maui Electric Other operation and maintenance 17,446 (221 ) 17,225 Total expense 67,988 (221 ) 67,767 Operating income 8,805 221 9,026 Retirement defined benefits expense--other than service costs — (221 ) (221 ) ASB Statements of Income Data (in Note 4) Compensation and employee benefits 23,237 (195 ) 23,042 Other expense 4,311 195 4,506 Leases . In February 2016, the FASB issued ASU No. 2016-02, “Leases (Topic 842),” which requires that lessees recognize a liability to make lease payments (the lease liability) and a right-of-use asset, representing its right to use the underlying asset for the lease term, for all leases (except short-term leases) at the commencement date. For leases with a term of 12 months or less, a lessee is permitted to make an accounting policy election and recognize lease expense for such leases generally on a straight-line basis over the lease term. For finance leases, a lessee is required to recognize interest on the lease liability separately from amortization of the right-of-use asset in the statement of income. For operating leases, a lessee is required to recognize a single lease cost, calculated so that the cost of the lease is allocated over the lease term on a generally straight-line basis. The Company plans to adopt ASU No. 2016-02 in the first quarter of 2019 and is currently analyzing the potential impact of adoption, which includes an in-process assessment of all of its operating leases and other arrangements that may meet the definition of a lease under the standard. Credit losses . In June 2016, the FASB issued ASU No. 2016-13, “ Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments ,” which is intended to improve financial reporting by requiring timelier recording of credit losses on loans and other financial instruments held by financial institutions and other organizations . ASU No. 2016-13 requires the measurement of all expected credit losses for financial assets held at the reporting date (based on historical experience, current conditions and reasonable and supportable forecasts) and enhanced disclosures to help financial statement users better understand significant estimates and judgments used in estimating credit losses, as well as the credit quality and underwriting standards of an organization’s portfolio. In addition, ASU No. 2016-13 amends the accounting for credit losses on available-for-sale (AFS) debt securities and purchased financial assets with credit deterioration. The other-than-temporary impairment model of accounting for credit losses on AFS debt securities will be replaced with an estimate of expected credit losses only when the fair value is below the amortized cost of the asset. The length of time the fair value of an AFS debt security has been below the amortized cost will no longer impact the determination of whether a credit loss exists. The AFS debt security model will also require the use of an allowance to record the estimated losses (and subsequent recoveries). The accounting for the initial recognition of the estimated expected credit losses for purchased financial assets with credit deterioration would be recognized through an allowance for credit losses with an offset to the cost basis of the related financial asset at acquisition (i.e., there is no impact to net income at initial recognition). The Company plans to adopt ASU No. 2016-13 in the first quarter of 2020. The guidance is to be applied on a modified retrospective basis with the cumulative effect of initially applying the amendments recognized in retained earnings at the date of initial application. The Company has assembled a project team that meets regularly to evaluate the provisions of this ASU, identify additional data requirements necessary and determine an approach for implementation. The team has assigned roles and responsibilities and developed key tasks to complete and a general timeline to be followed. The Company is evaluating the effect that this ASU will have on the consolidated financial statements and disclosures. Economic conditions and the composition of the Company’s loan portfolio at the time of adoption will influence the extent of the adopting accounting adjustment.

Basis of presentation (Tables)

Basis of presentation (Tables)	3 Months Ended
	Mar. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Impact of Prior Period Financial Statements of the Adoption of ASU 2017-07	The following table summarizes the impact to the prior period financial statements of the adoption of ASU No. 2017-07: (in thousands) As previously filed Adjustment from adoption of ASU No. 2017-07 As currently reported Three months ended March 31, 2017 HEI Condensed Consolidated Income Statement Expenses Electric utility $ 469,673 $ (1,423 ) $ 468,250 Bank 48,696 (195 ) 48,501 Other 5,331 (258 ) 5,073 Total expenses 523,700 (1,876 ) 521,824 Operating income Electric utility 48,938 1,423 50,361 Bank 24,160 195 24,355 Other (5,236 ) 258 (4,978 ) Total operating income 67,862 1,876 69,738 Retirement defined benefits expense--other than service costs — (1,876 ) (1,876 ) Hawaiian Electric Condensed Consolidated Income Statement Other operation and maintenance 100,240 (1,423 ) 98,817 Total expense 469,673 (1,423 ) 468,250 Operating income 48,938 1,423 50,361 Retirement defined benefits expense--other than service costs — (1,423 ) (1,423 ) Hawaiian Electric Condensed Consolidating Income Statement (in Note 3) Hawaiian Electric (parent only) Other operation and maintenance 67,278 (1,285 ) 65,993 Total expense 333,188 (1,285 ) 331,903 Operating income 29,655 1,285 30,940 Retirement defined benefits expense--other than service costs — (1,285 ) (1,285 ) Hawaii Electric Light Other operation and maintenance 15,516 83 15,599 Total expense 68,497 83 68,580 Operating income 10,485 (83 ) 10,402 Retirement defined benefits expense--other than service costs — 83 83 Maui Electric Other operation and maintenance 17,446 (221 ) 17,225 Total expense 67,988 (221 ) 67,767 Operating income 8,805 221 9,026 Retirement defined benefits expense--other than service costs — (221 ) (221 ) ASB Statements of Income Data (in Note 4) Compensation and employee benefits 23,237 (195 ) 23,042 Other expense 4,311 195 4,506

Segment financial information (

Segment financial information (Tables)	3 Months Ended
	Mar. 31, 2018
Segment Reporting [Abstract]
Schedule of segment financial information	(in thousands) Electric utility Bank Other Total Three months ended March 31, 2018 Revenues from external customers $ 570,414 $ 75,419 $ 41 $ 645,874 Intersegment revenues (eliminations) 13 — (13 ) — Revenues $ 570,427 $ 75,419 $ 28 $ 645,874 Income (loss) before income taxes $ 37,149 $ 24,500 $ (8,373 ) $ 53,276 Income taxes (benefit) 9,175 5,540 (2,159 ) 12,556 Net income (loss) 27,974 18,960 (6,214 ) 40,720 Preferred stock dividends of subsidiaries 499 — (26 ) 473 Net income (loss) for common stock $ 27,475 $ 18,960 $ (6,188 ) $ 40,247 Total assets (at March 31, 2018) $ 5,710,569 $ 6,889,445 $ 102,704 $ 12,702,718 Three months ended March 31, 2017 Revenues from external customers $ 518,566 $ 72,856 $ 140 $ 591,562 Intersegment revenues (eliminations) 45 — (45 ) — Revenues $ 518,611 $ 72,856 $ 95 $ 591,562 Income before income taxes $ 34,722 $ 24,160 $ (7,300 ) $ 51,582 Income taxes 12,758 8,347 (4,189 ) 16,916 Net income 21,964 15,813 (3,111 ) 34,666 Preferred stock dividends of subsidiaries 499 — (26 ) 473 Net income for common stock $ 21,465 $ 15,813 $ (3,085 ) $ 34,193 Total assets (at December 31, 2017) $ 5,630,613 $ 6,798,659 $ 104,888 $ 12,534,160

Electric utility segment (Table

Electric utility segment (Tables)	3 Months Ended
	Mar. 31, 2018
Regulatory Projects and Legal Obligations [Line Items]
Schedule of condensed consolidating statements of income (loss)	Statements of Income Data Three months ended March 31 (in thousands) 2018 2017 Interest and dividend income Interest and fees on loans $ 52,800 $ 50,742 Interest and dividends on investment securities 9,202 6,980 Total interest and dividend income 62,002 57,722 Interest expense Interest on deposit liabilities 2,957 2,103 Interest on other borrowings 496 816 Total interest expense 3,453 2,919 Net interest income 58,549 54,803 Provision for loan losses 3,541 3,907 Net interest income after provision for loan losses 55,008 50,896 Noninterest income Fees from other financial services 4,654 5,610 Fee income on deposit liabilities 5,189 5,428 Fee income on other financial products 1,654 1,866 Bank-owned life insurance 871 983 Mortgage banking income 613 789 Other income, net 436 458 Total noninterest income 13,417 15,134 Noninterest expense Compensation and employee benefits 24,440 23,042 Occupancy 4,280 4,154 Data processing 3,464 3,280 Services 3,047 2,360 Equipment 1,728 1,748 Office supplies, printing and postage 1,507 1,535 Marketing 645 517 FDIC insurance 713 728 Other expense 4,101 4,506 Total noninterest expense 43,925 41,870 Income before income taxes 24,500 24,160 Income taxes 5,540 8,347 Net income $ 18,960 $ 15,813 Reconciliation to amounts per HEI Condensed Consolidated Statements of Income*: Three months ended March 31 (in thousands) 2018 2017 Interest and dividend income $ 62,002 $ 57,722 Noninterest income 13,417 15,134 *Revenues-Bank 75,419 72,856 Total interest expense 3,453 2,919 Provision for loan losses 3,541 3,907 Noninterest expense 43,925 41,870 Less: Retirement defined benefits expense—other than service costs (387 ) (195 ) *Expenses-Bank 50,532 48,501 *Operating income-Bank 24,887 24,355 Add back: Retirement defined benefits expense—other than service costs 387 195 Income before income taxes $ 24,500 $ 24,160
Schedule of condensed consolidating balance sheet	Balance Sheets Data (in thousands) March 31, 2018 December 31, 2017 Assets Cash and due from banks $ 123,580 $ 140,934 Interest-bearing deposits 90,643 93,165 Investment securities Available-for-sale, at fair value 1,418,490 1,401,198 Held-to-maturity, at amortized cost (fair value of $42,491 and $44,412, respectively) 43,450 44,515 Stock in Federal Home Loan Bank, at cost 10,158 9,706 Loans held for investment 4,742,024 4,670,768 Allowance for loan losses (53,895 ) (53,637 ) Net loans 4,688,129 4,617,131 Loans held for sale, at lower of cost or fair value 7,379 11,250 Other 425,426 398,570 Goodwill 82,190 82,190 Total assets $ 6,889,445 $ 6,798,659 Liabilities and shareholder’s equity Deposit liabilities—noninterest-bearing $ 1,795,114 $ 1,760,233 Deposit liabilities—interest-bearing 4,283,953 4,130,364 Other borrowings 100,430 190,859 Other 106,482 110,356 Total liabilities 6,285,979 6,191,812 Commitments and contingencies Common stock 1 1 Additional paid in capital 345,652 345,018 Retained earnings 300,837 292,957 Accumulated other comprehensive loss, net of tax benefits Net unrealized losses on securities $ (28,248 ) $ (14,951 ) Retirement benefit plans (14,776 ) (43,024 ) (16,178 ) (31,129 ) Total shareholder’s equity 603,466 606,847 Total liabilities and shareholder’s equity $ 6,889,445 $ 6,798,659 Other assets Bank-owned life insurance $ 149,656 $ 148,775 Premises and equipment, net 164,702 136,270 Prepaid expenses 4,549 3,961 Accrued interest receivable 18,461 18,724 Mortgage-servicing rights 8,541 8,639 Low-income housing equity investments 57,222 59,016 Real estate acquired in settlement of loans, net — 133 Other 22,295 23,052 $ 425,426 $ 398,570 Other liabilities Accrued expenses $ 49,034 $ 39,312 Federal and state income taxes payable 1,369 3,736 Cashier’s checks 22,990 27,000 Advance payments by borrowers 6,255 10,245 Other 26,834 30,063 $ 106,482 $ 110,356
Hawaiian Electric Company, Inc. and Subsidiaries
Regulatory Projects and Legal Obligations [Line Items]
Schedule of purchases from all IPPs	Purchases from all IPPs were as follows: Three months ended March 31 (in millions) 2018 2017 Kalaeloa $ 40 $ 40 AES Hawaii 37 29 HPOWER 15 17 Puna Geothermal Venture 11 8 Hamakua Energy 7 7 Other IPPs 1 30 26 Total IPPs $ 140 $ 127 1 Includes wind power, solar power, feed-in tariff projects and other PPAs.
Schedule of net annual incremental amounts proposed to be collected (refunded)	The net annual incremental amounts to be collected (refunded) are as follows: (in millions) Hawaiian Electric Hawaii Electric Light Maui Electric 2018 Annual incremental RAM adjusted revenues $ 13.8 $ 3.4 $ 2.3 Annual change in accrued RBA balance as of December 31, 2017 (and associated revenue taxes) $ 6.6 $ 0.7 $ 3.2 2017 Tax Reform Act Adjustment $ — $ — $ (2.4 ) Net annual incremental amount to be collected under the tariffs $ 20.4 $ 4.1 $ 3.1 * Maui Electric incorporated a ( $2.4 million ) adjustment into its 2018 annual decoupling filing to incorporate the impact of the lower corporate income tax rate and the exclusion of the domestic production activities deduction, as a result of the Tax Act. Tax adjustments for Hawaiian Electric and Hawaii Electric Light are described in the discussion below of their respective on-going rate cases.
Schedule of condensed consolidating statements of income (loss)	Condensed Consolidating Statement of Income Three months ended March 31, 2017 (in thousands) Hawaiian Electric Hawaii Electric Light Maui Electric Other subsidiaries Consolidating adjustments Hawaiian Electric Revenues $ 362,843 78,982 76,793 — (7 ) $ 518,611 Expenses Fuel oil 98,001 17,257 29,012 — — 144,270 Purchased power 100,147 18,589 8,388 — — 127,124 Other operation and maintenance 65,993 15,599 17,225 — — 98,817 Depreciation 32,722 9,685 5,809 — — 48,216 Taxes, other than income taxes 35,040 7,450 7,333 — — 49,823 Total expenses 331,903 68,580 67,767 — — 468,250 Operating income 30,940 10,402 9,026 — (7 ) 50,361 Allowance for equity funds used during construction 2,056 115 228 — — 2,399 Equity in earnings of subsidiaries 8,603 — — — (8,603 ) — Retirement defined benefits expense—other than service costs (1,285 ) 83 (221 ) — — (1,423 ) Interest expense and other charges, net (12,057 ) (3,004 ) (2,450 ) — 7 (17,504 ) Allowance for borrowed funds used during construction 749 45 95 — — 889 Income before income taxes 29,006 7,641 6,678 — (8,603 ) 34,722 Income taxes 7,271 2,923 2,564 — — 12,758 Net income 21,735 4,718 4,114 — (8,603 ) 21,964 Preferred stock dividends of subsidiaries — 134 95 — — 229 Net income attributable to Hawaiian Electric 21,735 4,584 4,019 — (8,603 ) 21,735 Preferred stock dividends of Hawaiian Electric 270 — — — — 270 Net income for common stock $ 21,465 4,584 4,019 — (8,603 ) $ 21,465 Condensed Consolidating Statement of Income Three months ended March 31, 2018 (in thousands) Hawaiian Electric Hawaii Electric Light Maui Electric Other subsidiaries Consolidating adjustments Hawaiian Electric Revenues $ 401,180 87,933 81,356 — (42 ) $ 570,427 Expenses Fuel oil 114,498 18,487 33,983 — — 166,968 Purchased power 107,370 23,834 8,706 — — 139,910 Other operation and maintenance 72,940 16,098 18,572 — — 107,610 Depreciation 34,439 10,055 5,972 — — 50,466 Taxes, other than income taxes 38,167 8,212 7,725 — — 54,104 Total expenses 367,414 76,686 74,958 — — 519,058 Operating income 33,766 11,247 6,398 — (42 ) 51,369 Allowance for equity funds used during construction 2,887 111 296 — — 3,294 Equity in earnings of subsidiaries 9,325 — — — (9,325 ) — Retirement defined benefits expense—other than service costs (1,062 ) (103 ) (99 ) — — (1,264 ) Interest expense and other charges, net (12,495 ) (2,907 ) (2,334 ) — 42 (17,694 ) Allowance for borrowed funds used during construction 1,238 64 142 — — 1,444 Income before income taxes 33,659 8,412 4,403 — (9,325 ) 37,149 Income taxes 5,914 2,177 1,084 — — 9,175 Net income 27,745 6,235 3,319 — (9,325 ) 27,974 Preferred stock dividends of subsidiaries — 134 95 — — 229 Net income attributable to Hawaiian Electric 27,745 6,101 3,224 — (9,325 ) 27,745 Preferred stock dividends of Hawaiian Electric 270 — — — — 270 Net income for common stock $ 27,475 6,101 3,224 — (9,325 ) $ 27,475
Schedule of condensed consolidating statement of comprehensive income	Condensed Consolidating Statement of Comprehensive Income Three months ended March 31, 2018 (in thousands) Hawaiian Electric Hawaii Electric Light Maui Electric Other subsidiaries Consolidating adjustments Hawaiian Electric Net income for common stock $ 27,475 6,101 3,224 — (9,325 ) $ 27,475 Other comprehensive income (loss), net of taxes: Retirement benefit plans: Adjustment for amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of tax benefits 4,653 675 562 — (1,237 ) 4,653 Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of taxes (4,622 ) (675 ) (562 ) — 1,237 (4,622 ) Other comprehensive income, net of taxes 31 — — — — 31 Comprehensive income attributable to common shareholder $ 27,506 6,101 3,224 — (9,325 ) $ 27,506 Condensed Consolidating Statement of Comprehensive Income Three months ended March 31, 2017 (in thousands) Hawaiian Electric Hawaii Electric Light Maui Electric Other subsidiaries Consolidating adjustments Hawaiian Electric Net income for common stock $ 21,465 4,584 4,019 — (8,603 ) $ 21,465 Other comprehensive income (loss), net of taxes: Derivatives qualifying as cash flow hedges: Reclassification adjustment to net income, net of taxes 454 — — — — 454 Retirement benefit plans: Adjustment for amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of tax benefits 3,618 503 466 — (969 ) 3,618 Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of taxes (3,613 ) (503 ) (467 ) — 970 (3,613 ) Other comprehensive income (loss), net of taxes 459 — (1 ) — 1 459 Comprehensive income attributable to common shareholder $ 21,924 4,584 4,018 — (8,602 ) $ 21,924
Schedule of condensed consolidating balance sheet	Condensed Consolidating Balance Sheet December 31, 2017 (in thousands) Hawaiian Electric Hawaii Electric Light Maui Electric Other subsidiaries Consoli- dating adjustments Hawaiian Electric Assets Property, plant and equipment Utility property, plant and equipment Land $ 43,972 6,189 3,016 — — $ 53,177 Plant and equipment 4,140,892 1,206,776 1,053,372 — — 6,401,040 Less accumulated depreciation (1,451,612 ) (528,024 ) (496,716 ) — — (2,476,352 ) Construction in progress 231,571 8,182 23,341 — — 263,094 Utility property, plant and equipment, net 2,964,823 693,123 583,013 — — 4,240,959 Nonutility property, plant and equipment, less accumulated depreciation 5,933 115 1,532 — — 7,580 Total property, plant and equipment, net 2,970,756 693,238 584,545 — — 4,248,539 Investment in wholly owned subsidiaries, at equity 557,013 — — — (557,013 ) — Current assets Cash and cash equivalents 2,059 4,025 6,332 101 — 12,517 Advances to affiliates — — 12,000 — (12,000 ) — Customer accounts receivable, net 86,987 22,510 18,392 — — 127,889 Accrued unbilled revenues, net 77,176 15,940 13,938 — — 107,054 Other accounts receivable, net 11,376 2,268 1,210 — (7,691 ) 7,163 Fuel oil stock, at average cost 64,972 8,698 13,203 — — 86,873 Materials and supplies, at average cost 28,325 8,041 18,031 — — 54,397 Prepayments and other 17,928 4,514 2,913 — — 25,355 Regulatory assets 76,203 5,038 7,149 — — 88,390 Total current assets 365,026 71,034 93,168 101 (19,691 ) 509,638 Other long-term assets Regulatory assets 557,464 122,783 100,660 — — 780,907 Other 60,157 16,311 15,061 — — 91,529 Total other long-term assets 617,621 139,094 115,721 — — 872,436 Total assets $ 4,510,416 903,366 793,434 101 (576,704 ) $ 5,630,613 Capitalization and liabilities Capitalization Common stock equity $ 1,845,283 286,647 270,265 101 (557,013 ) $ 1,845,283 Cumulative preferred stock—not subject to mandatory redemption 22,293 7,000 5,000 — — 34,293 Long-term debt, net 924,979 202,701 190,836 — — 1,318,516 Total capitalization 2,792,555 496,348 466,101 101 (557,013 ) 3,198,092 Current liabilities Current portion of long-term debt 29,978 10,992 8,993 — — 49,963 Short-term borrowings-non-affiliate 4,999 — — — — 4,999 Short-term borrowings-affiliate 12,000 — — — (12,000 ) — Accounts payable 121,328 17,855 20,427 — — 159,610 Interest and preferred dividends payable 15,677 4,174 2,735 — (11 ) 22,575 Taxes accrued 133,839 34,950 30,312 — — 199,101 Regulatory liabilities 607 1,245 1,549 — — 3,401 Other 43,121 9,818 14,197 — (7,680 ) 59,456 Total current liabilities 361,549 79,034 78,213 — (19,691 ) 499,105 Deferred credits and other liabilities Deferred income taxes 281,223 56,955 55,863 — — 394,041 Regulatory liabilities 613,329 169,139 94,901 — — 877,369 Unamortized tax credits 59,039 16,167 15,163 — — 90,369 Defined benefit pension and other postretirement benefit plans liability 340,983 66,447 65,518 — — 472,948 Other 61,738 19,276 17,675 — — 98,689 Total deferred credits and other liabilities 1,356,312 327,984 249,120 — — 1,933,416 Total capitalization and liabilities $ 4,510,416 903,366 793,434 101 (576,704 ) $ 5,630,613 Condensed Consolidating Balance Sheet March 31, 2018 (in thousands) Hawaiian Electric Hawaii Electric Light Maui Electric Other subsidiaries Consoli- dating adjustments Hawaiian Electric Assets Property, plant and equipment Utility property, plant and equipment Land $ 44,001 5,923 3,016 — — $ 52,940 Plant and equipment 4,176,161 1,212,692 1,063,362 — — 6,452,215 Less accumulated depreciation (1,472,313 ) (534,083 ) (501,546 ) — — (2,507,942 ) Construction in progress 256,058 10,150 25,729 — — 291,937 Utility property, plant and equipment, net 3,003,907 694,682 590,561 — — 4,289,150 Nonutility property, plant and equipment, less accumulated depreciation 5,935 115 1,532 — — 7,582 Total property, plant and equipment, net 3,009,842 694,797 592,093 — — 4,296,732 Investment in wholly owned subsidiaries, at equity 559,511 — — — (559,511 ) — Current assets Cash and cash equivalents 11,988 5,080 6,230 101 — 23,399 Advances to affiliates 3,000 — — — (3,000 ) — Customer accounts receivable, net 97,943 24,117 19,373 — — 141,433 Accrued unbilled revenues, net 70,618 15,182 13,835 — — 99,635 Other accounts receivable, net 10,019 1,973 1,314 — (9,353 ) 3,953 Fuel oil stock, at average cost 66,294 9,501 12,928 — — 88,723 Materials and supplies, at average cost 29,420 8,591 17,681 — — 55,692 Prepayments and other 22,811 3,661 3,736 — — 30,208 Regulatory assets 87,449 6,698 8,653 — — 102,800 Total current assets 399,542 74,803 83,750 101 (12,353 ) 545,843 Other long-term assets Regulatory assets 549,020 120,529 100,150 — — 769,699 Other 63,792 17,751 16,752 — — 98,295 Total other long-term assets 612,812 138,280 116,902 — — 867,994 Total assets $ 4,581,707 907,880 792,745 101 (571,864 ) $ 5,710,569 Capitalization and liabilities Capitalization Common stock equity $ 1,846,955 288,927 270,483 101 (559,511 ) $ 1,846,955 Cumulative preferred stock—not subject to mandatory redemption 22,293 7,000 5,000 — — 34,293 Long-term debt, net 925,065 202,725 190,864 — — 1,318,654 Total capitalization 2,794,313 498,652 466,347 101 (559,511 ) 3,199,902 Current liabilities Current portion of long-term debt 29,984 10,994 8,995 — — 49,973 Short-term borrowings from non-affiliates 121,983 — — — — 121,983 Short-term borrowings from affiliate — 3,000 — — (3,000 ) — Accounts payable 102,402 17,867 22,130 — — 142,399 Interest and preferred dividends payable 18,422 4,006 3,791 — (15 ) 26,204 Taxes accrued 107,968 33,213 25,284 — — 166,465 Regulatory liabilities 2,612 2,387 1,934 — — 6,933 Other 45,137 9,127 14,949 — (9,338 ) 59,875 Total current liabilities 428,508 80,594 77,083 — (12,353 ) 573,832 Deferred credits and other liabilities Deferred income taxes 281,581 55,093 56,415 — — 393,089 Regulatory liabilities 620,758 172,193 95,209 — — 888,160 Unamortized tax credits 60,318 16,315 15,303 — — 91,936 Defined benefit pension and other postretirement benefit plans liability 335,674 65,340 64,612 — — 465,626 Other 60,555 19,693 17,776 — — 98,024 Total deferred credits and other liabilities 1,358,886 328,634 249,315 — — 1,936,835 Total capitalization and liabilities $ 4,581,707 907,880 792,745 101 (571,864 ) $ 5,710,569
Schedule of condensed consolidating statement of changes in common stock equity	Condensed Consolidating Statement of Changes in Common Stock Equity Three months ended March 31, 2017 (in thousands) Hawaiian Electric Hawaii Electric Light Maui Electric Other subsidiaries Consolidating adjustments Hawaiian Electric Balance, December 31, 2016 $ 1,799,787 291,291 259,554 101 (550,946 ) $ 1,799,787 Net income for common stock 21,465 4,584 4,019 — (8,603 ) 21,465 Other comprehensive income (loss), net of taxes 459 — (1 ) — 1 459 Common stock dividends (21,942 ) (3,874 ) (2,986 ) — 6,860 (21,942 ) Balance, March 31, 2017 $ 1,799,769 292,001 260,586 101 (552,688 ) $ 1,799,769 Condensed Consolidating Statement of Changes in Common Stock Equity Three months ended March 31, 2018 (in thousands) Hawaiian Electric Hawaii Electric Light Maui Electric Other subsidiaries Consolidating adjustments Hawaiian Electric Balance, December 31, 2017 $ 1,845,283 286,647 270,265 101 (557,013 ) $ 1,845,283 Net income for common stock 27,475 6,101 3,224 — (9,325 ) 27,475 Other comprehensive income, net of taxes 31 — — — — 31 Common stock dividends (25,826 ) (3,821 ) (3,006 ) — 6,827 (25,826 ) Common stock issuance expenses (8 ) — — — — (8 ) Balance, March 31, 2018 $ 1,846,955 288,927 270,483 101 (559,511 ) $ 1,846,955
Schedule of condensed consolidating statement of cash flows	Condensed Consolidating Statement of Cash Flows Three months ended March 31, 2017 (in thousands) Hawaiian Electric Hawaii Electric Light Maui Electric Other Consolidating Hawaiian Electric Cash flows from operating activities Net income $ 21,735 4,718 4,114 — (8,603 ) $ 21,964 Adjustments to reconcile net income to net cash provided by operating activities: Equity in earnings of subsidiaries (8,628 ) — — — 8,603 (25 ) Common stock dividends received from subsidiaries 6,910 — — — (6,860 ) 50 Depreciation of property, plant and equipment 32,722 9,685 5,809 — — 48,216 Other amortization 914 442 593 — — 1,949 Deferred income taxes 6,810 1,700 2,602 — (48 ) 11,064 Allowance for equity funds used during construction (2,056 ) (115 ) (228 ) — — (2,399 ) Other 661 (138 ) (87 ) — — 436 Changes in assets and liabilities: Decrease (increase) in accounts receivable (10,724 ) 1,239 685 — 1,472 (7,328 ) Increase in accrued unbilled revenues (4,577 ) (319 ) (1,043 ) — — (5,939 ) Decrease (increase) in fuel oil stock (9,234 ) 1,485 305 — — (7,444 ) Decrease (increase) in materials and supplies (2,267 ) (1,114 ) 15 — — (3,366 ) Decrease (increase) in regulatory assets 7,711 (677 ) (1,125 ) — — 5,909 Increase (decrease) in accounts payable 21,943 (1,721 ) (2,991 ) — — 17,231 Change in prepaid and accrued income taxes, tax credits and revenue taxes (32,272 ) (5,352 ) (6,408 ) — 48 (43,984 ) Increase in defined benefit pension and other postretirement benefit plans liability 240 14 10 — — 264 Change in other assets and liabilities (4,249 ) 805 197 — (1,472 ) (4,719 ) Net cash provided by operating activities 25,639 10,652 2,448 — (6,860 ) 31,879 Cash flows from investing activities Capital expenditures (64,035 ) (12,434 ) (8,243 ) — — (84,712 ) Contributions in aid of construction 8,934 915 801 — — 10,650 Other 2,352 78 272 — — 2,702 Advances from affiliates — (3,000 ) 7,500 — (4,500 ) — Net cash provided by (used in) investing activities (52,749 ) (14,441 ) 330 — (4,500 ) (71,360 ) Cash flows from financing activities Common stock dividends (21,942 ) (3,874 ) (2,986 ) — 6,860 (21,942 ) Preferred stock dividends of Hawaiian Electric and subsidiaries (270 ) (134 ) (95 ) — — (499 ) Net increase in short-term borrowings from non-affiliates and affiliate with original maturities of three months or less (3,000 ) — — — 4,500 1,500 Other (449 ) — (208 ) — — (657 ) Net cash used in financing activities (25,661 ) (4,008 ) (3,289 ) — 11,360 (21,598 ) Net decrease in cash and cash equivalents (52,771 ) (7,797 ) (511 ) — — (61,079 ) Cash and cash equivalents, beginning of period 61,388 10,749 2,048 101 — 74,286 Cash and cash equivalents, end of period $ 8,617 2,952 1,537 101 — $ 13,207 Condensed Consolidating Statement of Cash Flows Three months ended March 31, 2018 (in thousands) Hawaiian Electric Hawaii Electric Light Maui Electric Other subsidiaries Consolidating adjustments Hawaiian Electric Cash flows from operating activities Net income $ 27,745 6,235 3,319 — (9,325 ) $ 27,974 Adjustments to reconcile net income to net cash provided by operating activities: Equity in earnings of subsidiaries (9,350 ) — — — 9,325 (25 ) Common stock dividends received from subsidiaries 6,827 — — — (6,827 ) — Depreciation of property, plant and equipment 34,439 10,055 5,972 — — 50,466 Other amortization 3,237 1,554 553 — — 5,344 Deferred income taxes (271 ) (1,806 ) 497 — — (1,580 ) Allowance for equity funds used during construction (2,887 ) (111 ) (296 ) — — (3,294 ) Other 2,868 (103 ) (84 ) — — 2,681 Changes in assets and liabilities: Increase in accounts receivable (13,255 ) (2,048 ) (1,396 ) — 1,662 (15,037 ) Decrease in accrued unbilled revenues 6,558 758 103 — — 7,419 Decrease (increase) in fuel oil stock (1,322 ) (803 ) 275 — — (1,850 ) Decrease (increase) in materials and supplies (1,095 ) (550 ) 350 — — (1,295 ) Increase in regulatory assets (13,256 ) (1,773 ) (1,871 ) — — (16,900 ) Increase (decrease) in accounts payable (2,028 ) 4,050 3,121 — — 5,143 Change in prepaid and accrued income taxes, tax credits and revenue taxes (25,892 ) (1,882 ) (5,532 ) — 440 (32,866 ) Decrease in defined benefit pension and other postretirement benefit plans liability (592 ) (198 ) (148 ) — — (938 ) Change in other assets and liabilities 2,976 2,875 349 — (1,662 ) 4,538 Net cash provided by operating activities 14,702 16,253 5,212 — (6,387 ) 29,780 Cash flows from investing activities Capital expenditures (84,226 ) (15,161 ) (15,070 ) — — (114,457 ) Contributions in aid of construction 3,327 656 347 — — 4,330 Other 269 264 510 — (440 ) 603 Advances (to) from affiliates (3,000 ) — 12,000 — (9,000 ) — Net cash used in investing activities (83,630 ) (14,241 ) (2,213 ) — (9,440 ) (109,524 ) Cash flows from financing activities Common stock dividends (25,826 ) (3,821 ) (3,006 ) — 6,827 (25,826 ) Preferred stock dividends of Hawaiian Electric and subsidiaries (270 ) (134 ) (95 ) — — (499 ) Net increase in short-term borrowings from non-affiliates and affiliate with original maturities of three months or less 104,984 3,000 — — 9,000 116,984 Other (31 ) (2 ) — — — (33 ) Net cash provided by (used in) financing activities 78,857 (957 ) (3,101 ) — 15,827 90,626 Net increase (decrease) in cash and cash equivalents 9,929 1,055 (102 ) — — 10,882 Cash and cash equivalents, beginning of period 2,059 4,025 6,332 101 — 12,517 Cash and cash equivalents, end of period $ 11,988 5,080 6,230 101 — $ 23,399

Bank segment (Tables)

Bank segment (Tables)	3 Months Ended
	Mar. 31, 2018
Bank Subsidiary [Abstract]
Schedule of statements of income data	Statements of Income Data Three months ended March 31 (in thousands) 2018 2017 Interest and dividend income Interest and fees on loans $ 52,800 $ 50,742 Interest and dividends on investment securities 9,202 6,980 Total interest and dividend income 62,002 57,722 Interest expense Interest on deposit liabilities 2,957 2,103 Interest on other borrowings 496 816 Total interest expense 3,453 2,919 Net interest income 58,549 54,803 Provision for loan losses 3,541 3,907 Net interest income after provision for loan losses 55,008 50,896 Noninterest income Fees from other financial services 4,654 5,610 Fee income on deposit liabilities 5,189 5,428 Fee income on other financial products 1,654 1,866 Bank-owned life insurance 871 983 Mortgage banking income 613 789 Other income, net 436 458 Total noninterest income 13,417 15,134 Noninterest expense Compensation and employee benefits 24,440 23,042 Occupancy 4,280 4,154 Data processing 3,464 3,280 Services 3,047 2,360 Equipment 1,728 1,748 Office supplies, printing and postage 1,507 1,535 Marketing 645 517 FDIC insurance 713 728 Other expense 4,101 4,506 Total noninterest expense 43,925 41,870 Income before income taxes 24,500 24,160 Income taxes 5,540 8,347 Net income $ 18,960 $ 15,813 Reconciliation to amounts per HEI Condensed Consolidated Statements of Income*: Three months ended March 31 (in thousands) 2018 2017 Interest and dividend income $ 62,002 $ 57,722 Noninterest income 13,417 15,134 *Revenues-Bank 75,419 72,856 Total interest expense 3,453 2,919 Provision for loan losses 3,541 3,907 Noninterest expense 43,925 41,870 Less: Retirement defined benefits expense—other than service costs (387 ) (195 ) *Expenses-Bank 50,532 48,501 *Operating income-Bank 24,887 24,355 Add back: Retirement defined benefits expense—other than service costs 387 195 Income before income taxes $ 24,500 $ 24,160
Schedule of statements of comprehensive income data	Statements of Comprehensive Income Data Three months ended March 31 (in thousands) 2018 2017 Net income $ 18,960 $ 15,813 Other comprehensive income (loss), net of taxes: Net unrealized gains (losses) on available-for-sale investment securities: Net unrealized gains (losses) on available-for-sale investment securities arising during the period, net of (taxes) benefits of $4,867 and $(148), respectively (13,297 ) 223 Retirement benefit plans: Adjustment for amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of tax benefits of $694 and $404, respectively 1,222 612 Other comprehensive income (loss), net of taxes (12,075 ) 835 Comprehensive income $ 6,885 $ 16,648
Schedule of balance sheets data	Balance Sheets Data (in thousands) March 31, 2018 December 31, 2017 Assets Cash and due from banks $ 123,580 $ 140,934 Interest-bearing deposits 90,643 93,165 Investment securities Available-for-sale, at fair value 1,418,490 1,401,198 Held-to-maturity, at amortized cost (fair value of $42,491 and $44,412, respectively) 43,450 44,515 Stock in Federal Home Loan Bank, at cost 10,158 9,706 Loans held for investment 4,742,024 4,670,768 Allowance for loan losses (53,895 ) (53,637 ) Net loans 4,688,129 4,617,131 Loans held for sale, at lower of cost or fair value 7,379 11,250 Other 425,426 398,570 Goodwill 82,190 82,190 Total assets $ 6,889,445 $ 6,798,659 Liabilities and shareholder’s equity Deposit liabilities—noninterest-bearing $ 1,795,114 $ 1,760,233 Deposit liabilities—interest-bearing 4,283,953 4,130,364 Other borrowings 100,430 190,859 Other 106,482 110,356 Total liabilities 6,285,979 6,191,812 Commitments and contingencies Common stock 1 1 Additional paid in capital 345,652 345,018 Retained earnings 300,837 292,957 Accumulated other comprehensive loss, net of tax benefits Net unrealized losses on securities $ (28,248 ) $ (14,951 ) Retirement benefit plans (14,776 ) (43,024 ) (16,178 ) (31,129 ) Total shareholder’s equity 603,466 606,847 Total liabilities and shareholder’s equity $ 6,889,445 $ 6,798,659 Other assets Bank-owned life insurance $ 149,656 $ 148,775 Premises and equipment, net 164,702 136,270 Prepaid expenses 4,549 3,961 Accrued interest receivable 18,461 18,724 Mortgage-servicing rights 8,541 8,639 Low-income housing equity investments 57,222 59,016 Real estate acquired in settlement of loans, net — 133 Other 22,295 23,052 $ 425,426 $ 398,570 Other liabilities Accrued expenses $ 49,034 $ 39,312 Federal and state income taxes payable 1,369 3,736 Cashier’s checks 22,990 27,000 Advance payments by borrowers 6,255 10,245 Other 26,834 30,063 $ 106,482 $ 110,356
Schedule of the book value and aggregate fair value by major security type	The major components of investment securities were as follows: Amortized cost Gross unrealized gains Gross unrealized losses Estimated fair value Gross unrealized losses Less than 12 months 12 months or longer (dollars in thousands) Number of issues Fair value Amount Number of issues Fair value Amount March 31, 2018 Available-for-sale U.S. Treasury and federal agency obligations $ 181,919 $ 164 $ (3,255 ) $ 178,828 18 $ 93,034 $ (1,424 ) 9 $ 68,489 $ (1,831 ) Mortgage-related securities- FNMA, FHLMC and GNMA 1,259,732 389 (35,886 ) 1,224,235 86 762,936 (17,161 ) 79 447,876 (18,725 ) Mortgage revenue bond 15,427 — — 15,427 — — — — — — $ 1,457,078 $ 553 $ (39,141 ) $ 1,418,490 104 $ 855,970 $ (18,585 ) 88 $ 516,365 $ (20,556 ) Held-to-maturity Mortgage-related securities- FNMA, FHLMC and GNMA $ 43,450 $ — $ (959 ) $ 42,491 3 $ 42,491 $ (959 ) — $ — $ — $ 43,450 $ — $ (959 ) $ 42,491 3 $ 42,491 $ (959 ) — $ — $ — December 31, 2017 Available-for-sale U.S. Treasury and federal agency obligations $ 185,891 $ 438 $ (2,031 ) $ 184,298 15 $ 83,137 $ (825 ) 8 $ 62,296 $ (1,206 ) Mortgage-related securities- FNMA, FHLMC and GNMA 1,220,304 793 (19,624 ) 1,201,473 67 653,635 (6,839 ) 77 459,912 (12,785 ) Mortgage revenue bond 15,427 — — 15,427 — — — — — — $ 1,421,622 $ 1,231 $ (21,655 ) $ 1,401,198 82 $ 736,772 $ (7,664 ) 85 $ 522,208 $ (13,991 ) Held-to-maturity Mortgage-related securities- FNMA, FHLMC and GNMA $ 44,515 $ 1 $ (104 ) $ 44,412 2 $ 35,744 $ (104 ) — $ — $ — $ 44,515 $ 1 $ (104 ) $ 44,412 2 $ 35,744 $ (104 ) — $ — $ —
Schedule of contractual maturities of available-for-sale securities	The contractual maturities of investment securities were as follows: March 31, 2018 Amortized cost Fair value (in thousands) Available-for-sale Due in one year or less $ 15,000 $ 14,902 Due after one year through five years 83,983 82,887 Due after five years through ten years 69,986 68,521 Due after ten years 28,377 27,945 197,346 194,255 Mortgage-related securities-FNMA, FHLMC and GNMA 1,259,732 1,224,235 Total available-for-sale securities $ 1,457,078 $ 1,418,490 Held-to-maturity Mortgage-related securities-FNMA, FHLMC and GNMA $ 43,450 $ 42,491 Total held-to-maturity securities $ 43,450 $ 42,491
Schedule of components of loans receivable	The components of loans were summarized as follows: March 31, 2018 December 31, 2017 (in thousands) Real estate: Residential 1-4 family $ 2,116,121 $ 2,118,047 Commercial real estate 766,522 733,106 Home equity line of credit 914,941 913,052 Residential land 16,569 15,797 Commercial construction 114,535 108,273 Residential construction 15,363 14,910 Total real estate 3,944,051 3,903,185 Commercial 568,371 544,828 Consumer 230,258 223,564 Total loans 4,742,680 4,671,577 Less: Deferred fees and discounts (656 ) (809 ) Allowance for loan losses (53,895 ) (53,637 ) Total loans, net $ 4,688,129 $ 4,617,131
Schedule of allowance for loan losses	The allowance for loan losses (balances and changes) and financing receivables were as follows: (in thousands) Residential 1-4 family Commercial real estate Home Residential land Commercial construction Residential construction Commercial loans Consumer loans Unallo-cated Total Three months ended March 31, 2018 Allowance for loan losses: Beginning balance $ 2,902 $ 15,796 $ 7,522 $ 896 $ 4,671 $ 12 $ 10,851 $ 10,987 $ — $ 53,637 Charge-offs (31 ) — — (8 ) — — (602 ) (4,232 ) — (4,873 ) Recoveries 54 — 14 5 — — 1,170 347 — 1,590 Provision (400 ) 163 446 (219 ) (310 ) (8 ) (1,064 ) 4,933 — 3,541 Ending balance $ 2,525 $ 15,959 $ 7,982 $ 674 $ 4,361 $ 4 $ 10,355 $ 12,035 $ — $ 53,895 March 31, 2018 Ending balance: individually evaluated for impairment $ 1,207 $ 68 $ 892 $ 17 $ — $ — $ 519 $ 3 $ 2,706 Ending balance: collectively evaluated for impairment $ 1,318 $ 15,891 $ 7,090 $ 657 $ 4,361 $ 4 $ 9,836 $ 12,032 $ — $ 51,189 Financing Receivables: Ending balance $ 2,116,121 $ 766,522 $ 914,941 $ 16,569 $ 114,535 $ 15,363 $ 568,371 $ 230,258 $ 4,742,680 Ending balance: individually evaluated for impairment $ 17,728 $ 1,004 $ 10,265 $ 1,184 $ — $ — $ 4,385 $ 65 $ 34,631 Ending balance: collectively evaluated for impairment $ 2,098,393 $ 765,518 $ 904,676 $ 15,385 $ 114,535 $ 15,363 $ 563,986 $ 230,193 $ 4,708,049 Three months ended March 31, 2017 Allowance for loan losses: Beginning balance $ 2,873 $ 16,004 $ 5,039 $ 1,738 $ 6,449 $ 12 $ 16,618 $ 6,800 $ — $ 55,533 Charge-offs (6 ) — (14 ) — — — (1,510 ) (2,810 ) — (4,340 ) Recoveries 9 — 91 203 — — 297 297 — 897 Provision (95 ) 500 301 (462 ) 808 (1 ) (503 ) 3,359 — 3,907 Ending balance $ 2,781 $ 16,504 $ 5,417 $ 1,479 $ 7,257 $ 11 $ 14,902 $ 7,646 $ — $ 55,997 December 31, 2017 Ending balance: individually evaluated for impairment $ 1,248 $ 65 $ 647 $ 47 $ — $ — $ 694 $ 29 $ 2,730 Ending balance: collectively evaluated for impairment $ 1,654 $ 15,731 $ 6,875 $ 849 $ 4,671 $ 12 $ 10,157 $ 10,958 $ — $ 50,907 Financing Receivables: Ending balance $ 2,118,047 $ 733,106 $ 913,052 $ 15,797 $ 108,273 $ 14,910 $ 544,828 $ 223,564 $ 4,671,577 Ending balance: individually evaluated for impairment $ 18,284 $ 1,016 $ 8,188 $ 1,265 $ — $ — $ 4,574 $ 66 $ 33,393 Ending balance: collectively evaluated for impairment $ 2,099,763 $ 732,090 $ 904,864 $ 14,532 $ 108,273 $ 14,910 $ 540,254 $ 223,498 $ 4,638,184
Schedule of credit risk profile by internally assigned grade for loans	The credit risk profile by internally assigned grade for loans was as follows: March 31, 2018 December 31, 2017 (in thousands) Commercial real estate Commercial construction Commercial Commercial real estate Commercial construction Commercial Grade: Pass $ 667,555 $ 89,802 $ 518,819 $ 630,877 $ 83,757 $ 492,942 Special mention 46,283 22,500 27,876 49,347 22,500 27,997 Substandard 52,684 2,233 21,676 52,882 2,016 23,421 Doubtful — — — — — 468 Loss — — — — — — Total $ 766,522 $ 114,535 $ 568,371 $ 733,106 $ 108,273 $ 544,828
Schedule of credit risk profile based on payment activity for loans	The credit risk profile based on payment activity for loans was as follows: (in thousands) 30-59 days past due 60-89 days past due Greater than 90 days Total past due Current Total financing receivables Recorded investment> 90 days and accruing March 31, 2018 Real estate: Residential 1-4 family $ 1,902 $ 662 $ 4,605 $ 7,169 $ 2,108,952 $ 2,116,121 $ — Commercial real estate — — — — 766,522 766,522 — Home equity line of credit 1,943 1,350 2,121 5,414 909,527 914,941 — Residential land — — 640 640 15,929 16,569 — Commercial construction — — — — 114,535 114,535 — Residential construction — — — — 15,363 15,363 — Commercial 344 689 232 1,265 567,106 568,371 — Consumer 2,889 1,523 1,856 6,268 223,990 230,258 — Total loans $ 7,078 $ 4,224 $ 9,454 $ 20,756 $ 4,721,924 $ 4,742,680 $ — December 31, 2017 Real estate: Residential 1-4 family $ 1,532 $ 1,715 $ 5,071 $ 8,318 $ 2,109,729 $ 2,118,047 $ — Commercial real estate — — — — 733,106 733,106 — Home equity line of credit 425 114 2,051 2,590 910,462 913,052 — Residential land 23 — 625 648 15,149 15,797 — Commercial construction — — — — 108,273 108,273 — Residential construction — — — — 14,910 14,910 — Commercial 1,825 2,025 730 4,580 540,248 544,828 — Consumer 3,432 2,159 1,876 7,467 216,097 223,564 — Total loans $ 7,237 $ 6,013 $ 10,353 $ 23,603 $ 4,647,974 $ 4,671,577 $ —
Schedule of credit risk profile based on nonaccrual loans, accruing loans 90 days or more past due	The credit risk profile based on nonaccrual loans, accruing loans 90 days or more past due and troubled debt restructuring (TDR) loans was as follows: (in thousands) March 31, 2018 December 31, 2017 Real estate: Residential 1-4 family $ 13,578 $ 12,598 Commercial real estate — — Home equity line of credit 5,049 4,466 Residential land 853 841 Commercial construction — — Residential construction — — Commercial 2,714 3,069 Consumer 2,949 2,617 Total nonaccrual loans $ 25,143 $ 23,591 Real estate: Residential 1-4 family $ — $ — Commercial real estate — — Home equity line of credit — — Residential land — — Commercial construction — — Residential construction — — Commercial — — Consumer — — Total accruing loans 90 days or more past due $ — $ — Real estate: Residential 1-4 family $ 10,874 $ 10,982 Commercial real estate 1,004 1,016 Home equity line of credit 8,467 6,584 Residential land 331 425 Commercial construction — — Residential construction — — Commercial 1,886 1,741 Consumer 65 66 Total troubled debt restructured loans not included above $ 22,627 $ 20,814
Schedule of the carrying amount and the total unpaid principal balance of impaired loans, with and without recorded allowance for loans losses	The total carrying amount and the total unpaid principal balance of impaired loans were as follows: March 31, 2018 Three months ended March 31, 2018 (in thousands) Recorded investment Unpaid principal balance Related Allowance Average recorded investment Interest income recognized* With no related allowance recorded Real estate: Residential 1-4 family $ 8,673 $ 9,205 $ — $ 8,496 $ 107 Commercial real estate — — — — — Home equity line of credit 1,690 1,982 — 1,700 5 Residential land 1,130 1,429 — 1,168 5 Commercial construction — — — — — Residential construction — — — — — Commercial 2,499 3,411 — 2,357 10 Consumer 7 7 — 7 — $ 13,999 $ 16,034 $ — $ 13,728 $ 127 With an allowance recorded Real estate: Residential 1-4 family $ 9,055 $ 9,258 $ 1,207 $ 9,129 $ 93 Commercial real estate 1,004 1,004 68 1,008 11 Home equity line of credit 8,575 8,619 892 7,741 81 Residential land 54 54 17 77 2 Commercial construction — — — — — Residential construction — — — — — Commercial 1,886 1,886 519 1,957 36 Consumer 58 58 3 58 1 $ 20,632 $ 20,879 $ 2,706 $ 19,970 $ 224 Total Real estate: Residential 1-4 family $ 17,728 $ 18,463 $ 1,207 $ 17,625 $ 200 Commercial real estate 1,004 1,004 68 1,008 11 Home equity line of credit 10,265 10,601 892 9,441 86 Residential land 1,184 1,483 17 1,245 7 Commercial construction — — — — — Residential construction — — — — — Commercial 4,385 5,297 519 4,314 46 Consumer 65 65 3 65 1 $ 34,631 $ 36,913 $ 2,706 $ 33,698 $ 351 December 31, 2017 Three months ended March 31, 2017 (in thousands) Recorded investment Unpaid principal balance Related allowance Average recorded investment Interest income recognized* With no related allowance recorded Real estate: Residential 1-4 family $ 9,097 $ 9,644 $ — $ 9,555 $ 84 Commercial real estate — — — 220 — Home equity line of credit 1,496 1,789 — 2,004 14 Residential land 1,143 1,434 — 957 26 Commercial construction — — — — — Residential construction — — — — — Commercial 2,328 3,166 — 4,907 6 Consumer 8 8 — — — $ 14,072 $ 16,041 $ — $ 17,643 $ 130 With an allowance recorded Real estate: Residential 1-4 family $ 9,187 $ 9,390 $ 1,248 $ 10,048 $ 119 Commercial real estate 1,016 1,016 65 1,300 14 Home equity line of credit 6,692 6,736 647 4,562 49 Residential land 122 122 47 2,076 37 Commercial construction — — — — — Residential construction — — — — — Commercial 2,246 2,252 694 7,268 401 Consumer 58 58 29 30 — $ 19,321 $ 19,574 $ 2,730 $ 25,284 $ 620 Total Real estate: Residential 1-4 family $ 18,284 $ 19,034 $ 1,248 $ 19,603 $ 203 Commercial real estate 1,016 1,016 65 1,520 14 Home equity line of credit 8,188 8,525 647 6,566 63 Residential land 1,265 1,556 47 3,033 63 Commercial construction — — — — — Residential construction — — — — — Commercial 4,574 5,418 694 12,175 407 Consumer 66 66 29 30 — $ 33,393 $ 35,615 $ 2,730 $ 42,927 $ 750 * Since loan was classified as impaired.
Schedule of loan modifications	Loan modifications that occurred during the first quarters of 2018 and 2017 and the impact on the allowance for loan losses were as follows: Three months ended March 31, 2018 Number of contracts Outstanding recorded investment 1 Net increase in allowance (dollars in thousands) Pre-modification Post-modification (as of period end) Troubled debt restructurings Real estate: Residential 1-4 family 1 $ 339 $ 344 $ 16 Commercial real estate — — — — Home equity line of credit 18 2,170 2,174 388 Residential land 1 109 109 — Commercial construction — — — — Residential construction — — — — Commercial 5 2,251 2,251 — Consumer — — — — 25 $ 4,869 $ 4,878 $ 404 Three months ended March 31, 2017 Number of contracts Outstanding recorded 1 Net increase in allowance (dollars in thousands) Pre-modification Post-modification (as of period end) Troubled debt restructurings Real estate: Residential 1-4 family 3 $ 512 $ 520 $ 45 Commercial real estate — — — — Home equity line of credit 8 226 212 34 Residential land — — — — Commercial construction — — — — Residential construction — — — — Commercial 1 342 342 — Consumer 1 59 59 27 13 $ 1,139 $ 1,133 $ 106 1 The reported balances include loans that became TDR during the period, and were fully paid-off, charged-off, or sold prior to period end.
Schedule of troubled debt restructuring on financing receivables that experienced default	Loans modified in TDRs that experienced a payment default of 90 days or more during the first quarters of 2018 and 2017 , and for which the payment of default occurred within one year of the modification, were as follows: Three months ended March 31, 2018 Three months ended March 31, 2017 (dollars in thousands) Number of contracts Recorded investment Number of contracts Recorded investment Troubled debt restructurings that subsequently defaulted Real estate: Residential 1-4 family 1 $ 49 1 $ 301 Commercial real estate — — — — Home equity line of credit 1 86 — — Residential land — — — — Commercial construction — — — — Residential construction — — — — Commercial — — — — Consumer — — — — 2 $ 135 1 $ 301
Schedule of amortized intangible assets	Changes in the carrying value of mortgage servicing rights were as follows: (in thousands) Gross 1 Accumulated amortization 1 Valuation allowance Net March 31, 2018 $ 17,846 $ (9,305 ) $ — $ 8,541 December 31, 2017 17,511 (8,872 ) — 8,639 1 Reflects the impact of loans paid in full. Changes related to mortgage servicing rights were as follows: Three months ended March 31 (in thousands) 2018 2017 Mortgage servicing rights Beginning balance $ 8,639 $ 9,373 Amount capitalized 335 436 Amortization (433 ) (515 ) Other-than-temporary impairment — — Carrying amount before valuation allowance 8,541 9,294 Valuation allowance for mortgage servicing rights Beginning balance — — Provision (recovery) — — Other-than-temporary impairment — — Ending balance — — Net carrying value of mortgage servicing rights $ 8,541 $ 9,294
Schedule of key assumptions used in estimating fair value	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.
Schedule of sensitivity analysis of fair value, transferor's interests in transferred financial assets	The sensitivity analysis of fair value of MSRs to hypothetical adverse changes of 25 and 50 basis points in certain key assumptions was as follows: (dollars in thousands) March 31, 2018 December 31, 2017 Prepayment rate: 25 basis points adverse rate change $ (378 ) $ (869 ) 50 basis points adverse rate change (883 ) (1,828 ) Discount rate: 25 basis points adverse rate change (127 ) (111 ) 50 basis points adverse rate change (252 ) (220 )
Schedule of securities sold under agreements to repurchase	The following tables present information about the securities sold under agreements to repurchase, including the related collateral received from or pledged to counterparties: (in millions) Gross amount of recognized liabilities Gross amount offset in the Balance Sheet Net amount of liabilities presented in the Balance Sheet Repurchase agreements March 31, 2018 $ 50 $ — $ 50 December 31, 2017 141 — 141 Gross amount not offset in the Balance Sheet (in millions) Net amount of liabilities presented in the Balance Sheet Financial instruments Cash collateral pledged March 31, 2018 Commercial account holders $ 50 $ 97 $ — Total $ 50 $ 97 $ — December 31, 2017 Commercial account holders $ 141 $ 165 $ — Total $ 141 $ 165 $ —
Schedule of notional and fair value of derivatives	The notional amount and fair value of ASB’s derivative financial instruments were as follows: March 31, 2018 December 31, 2017 (in thousands) Notional amount Fair value Notional amount Fair value Interest rate lock commitments $ 24,741 $ 255 $ 13,669 $ 131 Forward commitments 26,844 (60 ) 14,465 (24 )
Schedule of derivative financial instruments	ASB’s derivative financial instruments, their fair values and balance sheet location were as follows: Derivative Financial Instruments Not Designated as Hedging Instruments 1 March 31, 2018 December 31, 2017 (in thousands) Asset derivatives Liability derivatives Asset derivatives Liability Interest rate lock commitments $ 264 $ 9 $ 133 $ 2 Forward commitments 18 78 4 28 $ 282 $ 87 $ 137 $ 30 1 Asset derivatives are included in other assets and liability derivatives are included in other liabilities in the balance sheets.
Schedule of derivative financial instruments and net gain or loss	The following table presents ASB’s derivative financial instruments and the amount and location of the net gains or losses recognized in ASB’s statements of income: Derivative Financial Instruments Not Designated as Hedging Instruments Location of net gains (losses) recognized in the Statement of Income Three months ended March 31 (in thousands) 2018 2017 Interest rate lock commitments Mortgage banking income $ 124 $ (104 ) Forward commitments Mortgage banking income (36 ) 73 $ 88 $ (31 )

Shareholders' equity (Tables)

Shareholders' equity (Tables)	3 Months Ended
	Mar. 31, 2018
Equity [Abstract]
Schedule of accumulated other comprehensive income	Changes in the balances of each component of accumulated other comprehensive income/(loss) (AOCI) were as follows: HEI Consolidated Hawaiian Electric Consolidated (in thousands) Net unrealized gains (losses) on securities Unrealized gains (losses) on derivatives Retirement benefit plans AOCI Unrealized gains (losses) on derivatives Retirement benefit plans AOCI Balance, December 31, 2017 $ (14,951 ) $ — $ (26,990 ) $ (41,941 ) $ — $ (1,219 ) $ (1,219 ) Current period other comprehensive income (loss) (13,297 ) — 524 (12,773 ) — 31 31 Balance, March 31, 2018 $ (28,248 ) $ — $ (26,466 ) $ (54,714 ) $ — $ (1,188 ) $ (1,188 ) Balance, December 31, 2016 $ (7,931 ) $ (454 ) $ (24,744 ) $ (33,129 ) $ (454 ) $ 132 $ (322 ) Current period other comprehensive income 223 454 308 985 454 5 459 Balance, March 31, 2017 $ (7,708 ) $ — $ (24,436 ) $ (32,144 ) $ — $ 137 $ 137
Schedule of reclassifications out of accumulated other comprehensive income/(loss)	Reclassifications out of AOCI were as follows: Amount reclassified from AOCI Three months ended March 31 Affected line item in the (in thousands) 2018 2017 Statements of Income / Balance Sheets HEI consolidated Derivatives qualifying as cash flow hedges: Window forward contracts $ — $ 454 Property, plant and equipment-electric utilities Retirement benefit plans: Amortization of prior service credit and net losses recognized during the period in net periodic benefit cost 5,146 3,921 See Note 8 for additional details Impact of D&Os of the PUC included in regulatory assets (4,622 ) (3,613 ) See Note 8 for additional details Total reclassifications $ 524 $ 762 Hawaiian Electric consolidated Derivatives qualifying as cash flow hedges: Window forward contracts $ — $ 454 Property, plant and equipment Retirement benefit plans: Amortization of prior service credit and net losses recognized during the period in net periodic benefit cost 4,653 3,618 See Note 8 for additional details Impact of D&Os of the PUC included in regulatory assets (4,622 ) (3,613 ) See Note 8 for additional details Total reclassifications $ 31 $ 459

Revenues (Tables)

Revenues (Tables)	3 Months Ended
	Mar. 31, 2018
Revenue from Contract with Customer [Abstract]
Disaggregation of revenue	The following tables disaggregates revenues by major source, timing of revenue recognition, and segment: Three months ended March 31, 2018 Electric utility Bank Other Total (in thousands) Revenues from contracts with customers Electric energy sales - residential $ 178,589 $ — $ — $ 178,589 Electric energy sales - commercial 188,998 — — 188,998 Electric energy sales - large light and power 192,321 — — 192,321 Electric energy sales - other 3,263 — — 3,263 Utility fees 797 — — 797 Bank fees — 11,497 — 11,497 Total revenues from contracts with customers 563,968 11,497 — 575,465 Revenues from other sources Regulatory revenue 4,750 — — 4,750 Bank interest and dividend income — 62,002 — 62,002 Other bank noninterest income — 1,920 — 1,920 Other 1,709 — 28 1,737 Total revenues from other sources 6,459 63,922 28 70,409 Total revenues $ 570,427 $ 75,419 $ 28 $ 645,874 Timing of revenue recognition Services/goods transferred at a point in time $ 797 $ 11,497 $ — $ 12,294 Services/goods transferred over time 563,171 — — 563,171 Total revenues from contracts with customers $ 563,968 $ 11,497 $ — $ 575,465

Retirement benefits (Tables)

Retirement benefits (Tables)	3 Months Ended
	Mar. 31, 2018
Compensation and Retirement Disclosure [Abstract]
Schedule of components of net periodic benefit cost for consolidated HEI	The components of NPPC and NPBC for HEI consolidated and Hawaiian Electric consolidated were as follows: Three months ended March 31 Pension benefits Other benefits (in thousands) 2018 2017 2018 2017 HEI consolidated Service cost $ 17,113 $ 16,494 $ 669 $ 840 Interest cost 19,234 20,216 1,931 2,411 Expected return on plan assets (27,254 ) (25,721 ) (3,192 ) (3,066 ) Amortization of net prior service gain (10 ) (14 ) (452 ) (449 ) Amortization of net actuarial loss (gain) 7,395 6,513 (2 ) 366 Net periodic pension/benefit cost (return) 16,478 17,488 (1,046 ) 102 Impact of PUC D&Os 2,657 (5,156 ) 1,071 146 Net periodic pension/benefit cost (adjusted for impact of PUC D&Os) $ 19,135 $ 12,332 $ 25 $ 248 Hawaiian Electric consolidated Service cost $ 16,673 $ 16,094 $ 664 $ 835 Interest cost 17,710 18,589 1,859 2,327 Expected return on plan assets (25,607 ) (24,011 ) (3,140 ) (3,017 ) Amortization of net prior service loss (gain) 2 2 (451 ) (451 ) Amortization of net actuarial loss 6,710 6,006 — 359 Net periodic pension/benefit cost (return) 15,488 16,680 (1,068 ) 53 Impact of PUC D&Os 2,657 (5,156 ) 1,071 146 Net periodic pension/benefit cost (adjusted for impact of PUC D&Os) $ 18,145 $ 11,524 $ 3 $ 199

Share-based compensation (Table

Share-based compensation (Tables)	3 Months Ended
	Mar. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of share-based compensation expense and related income tax benefit	Share-based compensation expense and the related income tax benefit were as follows: Three months ended March 31 (in millions) 2018 2017 HEI consolidated Share-based compensation expense 1 $ 1.7 $ 1.1 Income tax benefit 0.2 0.3 Hawaiian Electric consolidated Share-based compensation expense 1 0.6 0.5 Income tax benefit 0.1 0.2 1 For the three months ended March 31, 2018 and 2017, the Company has not capitalized any share-based compensation.
Schedule of common stock granted to a nonemployee director under the 2011 Director Plan	HEI granted HEI common stock to nonemployee directors of HEI, Hawaiian Electric and ASB under the 2011 Director Plan as follows: Three months ended March 31 (dollars in thousands) 2018 2017 Shares granted 1,074 770 Fair value $ 39 $ 25 Income tax benefit 10 10
Schedule of restricted stock units	Information about HEI’s grants of restricted stock units was as follows: Three months ended March 31 2018 2017 Shares (1) Shares (1) Outstanding, beginning of period 197,047 $ 31.53 220,683 $ 29.57 Granted 88,905 34.10 96,977 33.48 Vested (75,235 ) 30.55 (81,624 ) 28.85 Forfeited (2,629 ) 33.09 — — Outstanding, end of period 208,088 $ 32.97 236,036 $ 31.42 Total weighted-average grant-date fair value of shares granted (in millions) $ 3.0 $ 3.2 (1) Weighted-average grant-date fair value per share based on the average price of HEI common stock on the date of grant.
Schedule of Long-Term Incentive Plan (LTIP) linked to total return to shareholders	Information about HEI’s LTIP grants linked to TSR was as follows: Three months ended March 31 2018 2017 Shares (1) Shares (1) Outstanding, beginning of period 32,904 $ 39.51 83,106 $ 22.95 Granted 35,626 38.21 36,971 39.51 Vested (issued or unissued and cancelled) — — (83,106 ) 22.95 Forfeited (1,739 ) 38.83 — — Outstanding, end of period 66,791 $ 38.84 36,971 $ 39.51 Total weighted-average grant-date fair value of shares granted (in millions) $ 1.4 $ 1.5 (1) Weighted-average grant-date fair value per share determined using a Monte Carlo simulation model.
Schedule of Long-Term Incentive Program fair value awards granted	The following table summarizes the assumptions used to determine the fair value of the LTIP awards linked to TSR and the resulting fair value of LTIP awards granted: 2018 2017 Risk-free interest rate 2.29 % 1.46 % Expected life in years 3 3 Expected volatility 17.0 % 20.1 % Range of expected volatility for Peer Group 15.1% to 26.2% 15.4% to 26.0% Grant date fair value (per share) $38.20 $39.51
Schedule of Long-Term Incentive Plan (LTIP) linked to other performance conditions	Information about HEI’s LTIP awards payable in shares linked to other performance conditions was as follows: Three months ended March 31 2018 2017 Shares (1) Shares (1) Outstanding, beginning of period 131,616 $ 33.47 109,816 $ 25.18 Granted 142,509 34.10 147,888 33.48 Vested — — (109,816 ) 25.18 Forfeited (6,958 ) 33.81 — — Outstanding, end of period 267,167 $ 33.80 147,888 $ 33.48 Total weighted-average grant-date fair value of shares granted (at target performance levels) (in millions) $ 4.9 $ 5.0 (1) Weighted-average grant-date fair value per share based on the average price of HEI common stock on the date of grant.

Cash flows (Tables)

Cash flows (Tables)	3 Months Ended
	Mar. 31, 2018
Supplemental Cash Flow Elements [Abstract]
Schedule of supplemental disclosures of cash and noncash activity	Three months ended March 31 2018 2017 (in millions) Supplemental disclosures of cash flow information HEI consolidated Interest paid to non-affiliates $ 19 $ 19 Income taxes paid (including refundable credits) 3 4 Hawaiian Electric consolidated Interest paid to non-affiliates 12 13 Income taxes paid (including refundable credits) 5 2 Supplemental disclosures of noncash activities HEI consolidated Property, plant and equipment Estimated fair value of noncash contributions in aid of construction (investing) 3 — Unpaid invoices and accruals for capital expenditures, balance, end of period (investing) 48 27 Loans transferred from held for investment to held for sale (investing) 1 9 Common stock issued (gross) for director and executive/management compensation (financing) 1 3 9 Transfer of retail repurchase agreements to deposit liabilities (financing) 102 — Hawaiian Electric consolidated Electric utility property, plant and equipment Estimated fair value of noncash contributions in aid of construction (investing) 3 — Unpaid invoices and accruals for capital expenditures, balance, end of period (investing) 29 26 1 The amounts shown represent the market value of common stock issued for director and executive/management compensation and withheld to satisfy statutory tax liabilities.

Fair value measurements (Tables

Fair value measurements (Tables)	3 Months Ended
	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.

Basis of presentation (Details)

Basis of presentation (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Costs and expenses	$ 573,985	$ 521,824
Operating income	71,889	69,738
Retirement defined benefits expense—other than service costs	(1,833)	(1,876)
Increase in accounts, interest and dividends payable	22,808	24,903
Net cash provided by operating activities	34,677	46,991
Capital expenditures	(133,352)	(91,242)
Net cash used in investing activities	(231,051)	(184,481)
Hawaiian Electric Company, Inc. and Subsidiaries
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Costs and expenses	519,058	468,250
Operating income	51,369	50,361
Retirement defined benefits expense—other than service costs	(1,264)	(1,423)
Other operation and maintenance	107,610	98,817
Net cash provided by operating activities	29,780	31,879
Capital expenditures	(114,457)	(84,712)
Net cash used in investing activities	(109,524)	(71,360)
Increase (decrease) in accounts payable	5,143	17,231
Hawaiian Electric Company
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Costs and expenses	367,414	331,903
Operating income	33,766	30,940
Retirement defined benefits expense—other than service costs	(1,062)	(1,285)
Other operation and maintenance	72,940	65,993
Net cash provided by operating activities	14,702	25,639
Capital expenditures	(84,226)	(64,035)
Net cash used in investing activities	(83,630)	(52,749)
Increase (decrease) in accounts payable	(2,028)	21,943
Hawaii Electric Light Company, Inc. (HELCO)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Costs and expenses	76,686	68,580
Operating income	11,247	10,402
Retirement defined benefits expense—other than service costs	(103)	83
Other operation and maintenance	16,098	15,599
Net cash provided by operating activities	16,253	10,652
Capital expenditures	(15,161)	(12,434)
Net cash used in investing activities	(14,241)	(14,441)
Increase (decrease) in accounts payable	4,050	(1,721)
Maui Electric
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Costs and expenses	74,958	67,767
Operating income	6,398	9,026
Retirement defined benefits expense—other than service costs	(99)	(221)
Other operation and maintenance	18,572	17,225
Net cash provided by operating activities	5,212	2,448
Capital expenditures	(15,070)	(8,243)
Net cash used in investing activities	(2,213)	330
Increase (decrease) in accounts payable	3,121	(2,991)
American Savings Bank (ASB)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Costs and expenses	50,532	48,501
Operating income	24,887	24,355
Retirement defined benefits expense—other than service costs	387	195
Compensation and employee benefits	24,440	23,042
Other expense	4,101	4,506
Electric utility
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Costs and expenses	519,058	468,250
Operating income	51,369	50,361
Bank
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Costs and expenses	50,532	48,501
Operating income	24,887	24,355
Other
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Costs and expenses	4,395	5,073
Operating income	$ (4,367)	(4,978)
As previously filed
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Costs and expenses		523,700
Operating income		67,862
Retirement defined benefits expense—other than service costs		0
As previously filed | Hawaiian Electric Company, Inc. and Subsidiaries
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Costs and expenses		469,673
Operating income		48,938
Retirement defined benefits expense—other than service costs		0
Other operation and maintenance		100,240
As previously filed | Hawaiian Electric Company
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Costs and expenses		333,188
Operating income		29,655
Retirement defined benefits expense—other than service costs		0
Other operation and maintenance		67,278
As previously filed | Hawaii Electric Light Company, Inc. (HELCO)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Costs and expenses		68,497
Operating income		10,485
Retirement defined benefits expense—other than service costs		0
Other operation and maintenance		15,516
As previously filed | Maui Electric
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Costs and expenses		67,988
Operating income		8,805
Retirement defined benefits expense—other than service costs		0
Other operation and maintenance		17,446
As previously filed | American Savings Bank (ASB)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Compensation and employee benefits		23,237
Other expense		4,311
As previously filed | Electric utility
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Costs and expenses		469,673
Operating income		48,938
As previously filed | Bank
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Costs and expenses		48,696
Operating income		24,160
As previously filed | Other
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Costs and expenses		5,331
Operating income		(5,236)
Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase in accounts, interest and dividends payable		(46,943)
Net cash provided by operating activities		(46,943)
Capital expenditures		46,943
Net cash used in investing activities		46,943
Adjustment | Hawaiian Electric Company
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net cash provided by operating activities		(46,943)
Capital expenditures		46,943
Net cash used in investing activities		46,943
Increase (decrease) in accounts payable		(46,943)
Adjustment | ASU 2017-07
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Costs and expenses		(1,876)
Operating income		1,876
Retirement defined benefits expense—other than service costs		(1,876)
Adjustment | ASU 2017-07 | Hawaiian Electric Company, Inc. and Subsidiaries
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Costs and expenses		(1,423)
Operating income		1,423
Retirement defined benefits expense—other than service costs		(1,423)
Other operation and maintenance		(1,423)
Adjustment | ASU 2017-07 | Hawaiian Electric Company
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Costs and expenses		(1,285)
Operating income		1,285
Retirement defined benefits expense—other than service costs		(1,285)
Other operation and maintenance		(1,285)
Adjustment | ASU 2017-07 | Hawaii Electric Light Company, Inc. (HELCO)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Costs and expenses		83
Operating income		(83)
Retirement defined benefits expense—other than service costs		83
Other operation and maintenance		83
Adjustment | ASU 2017-07 | Maui Electric
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Costs and expenses		(221)
Operating income		221
Retirement defined benefits expense—other than service costs		(221)
Other operation and maintenance		(221)
Adjustment | ASU 2017-07 | American Savings Bank (ASB)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Compensation and employee benefits		(195)
Other expense		195
Adjustment | ASU 2017-07 | Electric utility
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Costs and expenses		(1,423)
Operating income		1,423
Adjustment | ASU 2017-07 | Bank
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Costs and expenses		(195)
Operating income		195
Adjustment | ASU 2017-07 | Other
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Costs and expenses		(258)
Operating income		$ 258

Segment financial information33

Segment financial information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Segment financial information
Total revenues	$ 645,874	$ 591,562
Income (loss) before income taxes	53,276	51,582
Income taxes (benefit)	12,556	16,916
Net income	40,720	34,666
Preferred stock dividends of subsidiaries	473	473
Net income for common stock	40,247	34,193
Total assets	12,702,718		$ 12,534,160
Revenues from external customers
Segment financial information
Total revenues	645,874	591,562
Intersegment revenues (eliminations)
Segment financial information
Total revenues	0	0
Electric utility
Segment financial information
Total revenues	570,427	518,611
Income (loss) before income taxes	37,149	34,722
Income taxes (benefit)	9,175	12,758
Net income	27,974	21,964
Preferred stock dividends of subsidiaries	499	499
Net income for common stock	27,475	21,465
Total assets	5,710,569		5,630,613
Electric utility | Revenues from external customers
Segment financial information
Total revenues	570,414	518,566
Electric utility | Intersegment revenues (eliminations)
Segment financial information
Total revenues	13	45
Bank
Segment financial information
Total revenues	75,419	72,856
Income (loss) before income taxes	24,500	24,160
Income taxes (benefit)	5,540	8,347
Net income	18,960	15,813
Preferred stock dividends of subsidiaries	0	0
Net income for common stock	18,960	15,813
Total assets	6,889,445		6,798,659
Bank | Revenues from external customers
Segment financial information
Total revenues	75,419	72,856
Bank | Intersegment revenues (eliminations)
Segment financial information
Total revenues	0	0
Other
Segment financial information
Total revenues	28	95
Income (loss) before income taxes	(8,373)	(7,300)
Income taxes (benefit)	(2,159)	(4,189)
Net income	(6,214)	(3,111)
Preferred stock dividends of subsidiaries	(26)	(26)
Net income for common stock	(6,188)	(3,085)
Total assets	102,704		$ 104,888
Other | Revenues from external customers
Segment financial information
Total revenues	41	140
Other | Intersegment revenues (eliminations)
Segment financial information
Total revenues	$ (13)	$ (45)

Electric utility segment - Taxe

Electric utility segment - Taxes (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Hawaiian Electric Company, Inc. and Subsidiaries
Revenue taxes
Revenue taxes included in operating revenues and in taxes other than income taxes expense	$ 51	$ 46

Electric utility segment - Unco

Electric utility segment - Unconsolidated variable interest entities (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018USD ($)agreemententity	Dec. 31, 2017USD ($)
Hawaiian Electric Company
Power purchase agreement
Number of power purchase agreements (PPAs) (in agreements) | agreement	5
Number of entities currently required to be consolidated as VIEs (in entities) | entity	0
Number of IPPs | entity	3
Number of firm capacity producers declining to provide financial information to determine primary beneficiary status (in entities) | entity	2
Minimum potential number of IPP entities consolidated into company in the future (in entities) | entity	1
Variable Interest Entity, Not Primary Beneficiary
Unconsolidated variable interest entities
Investment in 2004 Debentures	$ 51,500	$ 51,500
Interest income	$ 800
Variable Interest Entity, Not Primary Beneficiary | Hawaiian Electric Company
Unconsolidated variable interest entities
Percent of ownership in Trust III (as a percent)	100.00%
Variable Interest Entity, Not Primary Beneficiary | Hawaiian Electric Company | 2004 Trust Preferred Securities
Unconsolidated variable interest entities
Balance of Trust Securities	$ 50,000	50,000
Dividend distributions on Trust Preferred Securities	800
Variable Interest Entity, Not Primary Beneficiary | Hawaiian Electric Company | Trust Common Securities
Unconsolidated variable interest entities
Balance of Trust Securities	1,500	$ 1,500
Common dividend	$ 25

Electric utility segment - Powe

Electric utility segment - Power purchase agreements (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Regulatory Projects and Legal Obligations [Line Items]
Purchased power	$ 140,000	$ 127,000
Hawaiian Electric Company
Regulatory Projects and Legal Obligations [Line Items]
Purchased power	107,370	100,147
Hawaiian Electric Company | Kalaeloa Partners, L.P. (Kalaeloa)
Regulatory Projects and Legal Obligations [Line Items]
Purchased power	40,000	40,000
Hawaiian Electric Company | AES Hawaii
Regulatory Projects and Legal Obligations [Line Items]
Purchased power	37,000	29,000
Hawaiian Electric Company | HPOWER
Regulatory Projects and Legal Obligations [Line Items]
Purchased power	15,000	17,000
Hawaiian Electric Company | Puna Geothermal Venture
Regulatory Projects and Legal Obligations [Line Items]
Purchased power	11,000	8,000
Hawaiian Electric Company | Hamakua Energy Partners, L.P. (HEP)
Regulatory Projects and Legal Obligations [Line Items]
Purchased power	7,000	7,000
Hawaiian Electric Company | Other IPPs
Regulatory Projects and Legal Obligations [Line Items]
Purchased power	$ 30,000	$ 26,000

Electric utility segment - Comm

Electric utility segment - Commitments and contingencies (Details)	Mar. 29, 2018USD ($)	Mar. 05, 2018USD ($)	Feb. 16, 2018USD ($)	Jan. 19, 2018USD ($)	Dec. 15, 2017USD ($)	Oct. 12, 2017USD ($)	Aug. 21, 2017USD ($)	Jul. 11, 2017	Apr. 27, 2017USD ($)	Aug. 11, 2016USD ($)	May 23, 2016	Jan. 05, 2016USD ($)	Jun. 30, 2017USD ($)$ / kWh	Jul. 31, 2016MW	Sep. 30, 2015USD ($)	Jun. 30, 2015MW	Aug. 31, 2012MW	May 31, 2012MW	Mar. 31, 1988MW	Mar. 31, 2018USD ($)$ / kWh	Dec. 31, 1988MW	Mar. 31, 2018USD ($)	Mar. 31, 2018USD ($)	Mar. 31, 2018USD ($)	Mar. 27, 2018USD ($)	Feb. 26, 2018USD ($)	Dec. 31, 2017USD ($)	Dec. 18, 2017USD ($)
Regulatory Projects and Legal Obligations [Line Items]
Revenues with respect to interim orders related to general rate increase requests																				$ 7,000,000
Power purchase agreement, termination period											60 days
ERP/EAM cost recovery cap										$ 77,600,000
Public utility, ERP/EAM required pass through savings to customers										$ 244,000,000																		$ 244,000,000
ERP/EAM project service period (in years)										12 years
AFUDC rate										1.75%
ERP/EAM implementation project costs																						$ 47,700,000
ERP/EAM implementation project, operations and management																						8,600,000
ERP/EAM implementation project, capital costs																						2,600,000
ERP/EAM implementation project, deferred costs																						36,500,000
Schofield generating station facility capacity (in megawatts) | MW																	50
Schofield generating station project, budgetary cap												$ 157,300,000			$ 167,000,000
Percent of costs recoverable through recovery mechanisms other than base rates															90.00%
Decrease in project costs												$ 9,700,000
Project lease term (in years)												35 years
Project cost incurred																								$ 131,600,000
West Lock PV Project, energy generated (in megawatts) | MW														20
West Lock PV Project, cost cap													$ 67,000,000
West Lock PV Project, maximum energy cost (in dollars per kilowatt hours) | $ / kWh													0.0956
West Lock PV Project, project costs incurred																							$ 7,000,000
Accounts receivable and unbilled revenues, net																				$ 266,336,000		266,336,000	266,336,000	266,336,000			$ 263,209,000
Environmental regulation
Threshold of capital expenditures in excess of customer contributions for qualification for major project interim recovery									$ 2,500,000
Decoupling order, service reliability performance, historical measurement period (in years)																				10 years
Maximum penalty as a percent of equity																				20.00%
Service reliability, maximum penalty																				$ 6,200,000
Dead band percentage above or below the target																				3.00%
Call center performance, maximum penalty, percent																				8.00%
Call center performance, maximum penalty																				$ 1,200,000
Demand response, award percentage of annual maintenance costs																				5.00%
Demand response, maximum award																				$ 500,000
Demand response, penalty																				$ 0
Expected savings, percent																				20.00%
Energy price, renewable projects with storage capacity (in dollars per kilowatt hour) | $ / kWh																				0.115
Energy price, energy-only renewable projects (in dollars per kilowatt hour) | $ / kWh																				0.095
Performance incentive mechanism, incentive cap																				$ 3,500,000
Performance incentive mechanism penalty																				0
Revenue calculation assumptions, rate of return				7.57%	7.57%
Revenue calculation assumptions, percentage of return on average common equity		9.50%		9.50%	9.50%
General rate increase, revenue, calculation assumptions, rate of return, common equity capitalization percentage				57.00%	57.00%
Interim D&O, reduction in revenue requirement, baseline plant additions					$ 5,000,000
Interim D&O, Reduction in revenue requirement of pension regulatory asset					$ 6,000,000
Statement of probable entitlement, interim increase			$ 36,000,000	$ 36,000,000
Remaining settlement, reduction in revenue requirement		$ 38,300,000
Remaining settlement, reduction in O&M expenses		5,000,000
Remaining settlement, hold-back amount		$ 5,000,000
PCB Contamination
Environmental regulation
Valuation allowances and reserves																				4,700,000		4,700,000	4,700,000	4,700,000
AES Hawaii
Regulatory Projects and Legal Obligations [Line Items]
Purchase commitment, period (in years)																			30 years
Minimum power volume required (in megawatts) | MW																	186		180
Additional capacity requirement (in megawatts) | MW																9
Hu Honua Bioenergy, LLC
Regulatory Projects and Legal Obligations [Line Items]
Minimum power volume required (in megawatts) | MW																		21.5
Hawaiian Telcom
Regulatory Projects and Legal Obligations [Line Items]
Accounts receivable and unbilled revenues, net																				22,400,000		22,400,000	22,400,000	22,400,000
Hawaiian Electric Company
Environmental regulation
Decoupling filing, change in income taxes	$ 0
Hawaiian Electric Company | Hawaiian Telcom
Regulatory Projects and Legal Obligations [Line Items]
Accounts receivable and unbilled revenues, net																				15,100,000		15,100,000	15,100,000	15,100,000
Hawaiian Telcom
Regulatory Projects and Legal Obligations [Line Items]
Accounts receivable and unbilled revenues, net																				48,000,000		48,000,000	48,000,000	48,000,000
Hawaii Electric Light Company, Inc. (HELCO)
Environmental regulation
Decoupling filing, change in income taxes	0
Stipulated ROACE rate							9.50%	9.75%
General rate increase, ROACE, percentage decrease								25.00%
Interim general rate increase granted							$ 9,900,000
Decrease in test year revenue requirement, tax act																									$ 9,500,000
Hawaii Electric Light Company, Inc. (HELCO) | Hawaiian Telcom
Regulatory Projects and Legal Obligations [Line Items]
Accounts receivable and unbilled revenues, net																				6,000,000		6,000,000	6,000,000	6,000,000
Maui Electric
Environmental regulation
Additional accrued investigation and estimated cleanup costs																				2,700,000		2,700,000	2,700,000	2,700,000
Decoupling filing, change in income taxes	$ 2,400,000
General rate increase, revenue, calculation assumptions, rate of return, common equity capitalization percentage						56.90%
General rate increase, revenue						$ 30,100,000
General rate increase, revenue, percent						9.30%
General rate increase, revenue, calculation assumptions, rate of return						8.05%
General rate increase, revenue, calculation assumptions, rate of return, ROACE						10.60%
General rate increase, revenue, calculation assumptions, rate base						$ 473,000,000
Conditional general rate increase, revenue						$ 46,600,000
Conditional general rate increase, revenue, percentage						14.30%
Rate case, income tax expense reduction																										$ 8,100,000
Rate case, annual amortization credit																										500,000
Rate case, increase in rate base resulting from decrease in accumulated deferred income tax																										$ 7,100,000
Maui Electric | Hawaiian Telcom
Regulatory Projects and Legal Obligations [Line Items]
Accounts receivable and unbilled revenues, net																				$ 1,300,000		$ 1,300,000	$ 1,300,000	$ 1,300,000
Kalaeloa Partners, L.P. (Kalaeloa) | Hawaiian Electric Company
Regulatory Projects and Legal Obligations [Line Items]
Increased power purchase commitment capacity (in megawatts) | MW																					208

Electric utility segment - Annu

Electric utility segment - Annual decoupling filings summary (Details) $ in Millions	Mar. 29, 2018USD ($)
Hawaiian Electric Company
Regulatory Projects and Legal Obligations [Line Items]
2018 Annual incremental RAM adjusted revenues	$ 13.8
Annual change in accrued RBA balance as of December 31, 2017 (and associated revenue taxes)	6.6
2017 Tax Reform Act Adjustment	0
Net annual incremental amount to be collected under the tariffs	20.4
HELCO
Regulatory Projects and Legal Obligations [Line Items]
2018 Annual incremental RAM adjusted revenues	3.4
Annual change in accrued RBA balance as of December 31, 2017 (and associated revenue taxes)	0.7
2017 Tax Reform Act Adjustment	0
Net annual incremental amount to be collected under the tariffs	4.1
Maui Electric
Regulatory Projects and Legal Obligations [Line Items]
2018 Annual incremental RAM adjusted revenues	2.3
Annual change in accrued RBA balance as of December 31, 2017 (and associated revenue taxes)	3.2
2017 Tax Reform Act Adjustment	(2.4)
Net annual incremental amount to be collected under the tariffs	$ 3.1

Electric utility segment - Cond

Electric utility segment - Condensed consolidating statement of income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Condensed Income Statements, Captions [Line Items]
Revenues	$ 645,874	$ 591,562
Expenses
Purchased power	140,000	127,000
Total expenses	573,985	521,824
Total operating income	71,889	69,738
Allowance for equity funds used during construction	3,294	2,399
Retirement defined benefits expense—other than service costs	(1,833)	(1,876)
Allowance for borrowed funds used during construction	1,444	889
Income before income taxes	53,276	51,582
Income taxes	12,556	16,916
Net income	40,720	34,666
Preferred stock dividends of subsidiaries	473	473
Net income for common stock	40,247	34,193
Hawaiian Electric Company
Condensed Income Statements, Captions [Line Items]
Revenues	401,180	362,843
Expenses
Fuel oil	114,498	98,001
Purchased power	107,370	100,147
Other operation and maintenance	72,940	65,993
Depreciation	34,439	32,722
Taxes, other than income taxes	38,167	35,040
Total expenses	367,414	331,903
Total operating income	33,766	30,940
Allowance for equity funds used during construction	2,887	2,056
Equity in earnings of subsidiaries	9,325	8,603
Retirement defined benefits expense—other than service costs	(1,062)	(1,285)
Interest expense and other charges, net	(12,495)	(12,057)
Allowance for borrowed funds used during construction	1,238	749
Income before income taxes	33,659	29,006
Income taxes	5,914	7,271
Net income	27,745	21,735
Preferred stock dividends of subsidiaries	0	0
Net income attributable to Hawaiian Electric	27,745	21,735
Preferred stock dividends of Hawaiian Electric	270	270
Net income for common stock	27,475	21,465
HELCO
Condensed Income Statements, Captions [Line Items]
Revenues	87,933	78,982
Expenses
Fuel oil	18,487	17,257
Purchased power	23,834	18,589
Other operation and maintenance	16,098	15,599
Depreciation	10,055	9,685
Taxes, other than income taxes	8,212	7,450
Total expenses	76,686	68,580
Total operating income	11,247	10,402
Allowance for equity funds used during construction	111	115
Equity in earnings of subsidiaries	0	0
Retirement defined benefits expense—other than service costs	(103)	83
Interest expense and other charges, net	(2,907)	(3,004)
Allowance for borrowed funds used during construction	64	45
Income before income taxes	8,412	7,641
Income taxes	2,177	2,923
Net income	6,235	4,718
Preferred stock dividends of subsidiaries	134	134
Net income attributable to Hawaiian Electric	6,101	4,584
Preferred stock dividends of Hawaiian Electric	0	0
Net income for common stock	6,101	4,584
Maui Electric
Condensed Income Statements, Captions [Line Items]
Revenues	81,356	76,793
Expenses
Fuel oil	33,983	29,012
Purchased power	8,706	8,388
Other operation and maintenance	18,572	17,225
Depreciation	5,972	5,809
Taxes, other than income taxes	7,725	7,333
Total expenses	74,958	67,767
Total operating income	6,398	9,026
Allowance for equity funds used during construction	296	228
Equity in earnings of subsidiaries	0	0
Retirement defined benefits expense—other than service costs	(99)	(221)
Interest expense and other charges, net	(2,334)	(2,450)
Allowance for borrowed funds used during construction	142	95
Income before income taxes	4,403	6,678
Income taxes	1,084	2,564
Net income	3,319	4,114
Preferred stock dividends of subsidiaries	95	95
Net income attributable to Hawaiian Electric	3,224	4,019
Preferred stock dividends of Hawaiian Electric	0	0
Net income for common stock	3,224	4,019
Other subsidiaries
Condensed Income Statements, Captions [Line Items]
Revenues	0	0
Expenses
Fuel oil	0	0
Purchased power	0	0
Other operation and maintenance	0	0
Depreciation	0	0
Taxes, other than income taxes	0	0
Total expenses	0	0
Total operating income	0	0
Allowance for equity funds used during construction	0	0
Equity in earnings of subsidiaries	0	0
Retirement defined benefits expense—other than service costs	0	0
Interest expense and other charges, net	0	0
Allowance for borrowed funds used during construction	0	0
Income before income taxes	0	0
Income taxes	0	0
Net income	0	0
Preferred stock dividends of subsidiaries	0	0
Net income attributable to Hawaiian Electric	0	0
Preferred stock dividends of Hawaiian Electric	0	0
Net income for common stock	0	0
Consolidating adjustments
Condensed Income Statements, Captions [Line Items]
Revenues	(42)	(7)
Expenses
Fuel oil	0	0
Purchased power	0	0
Other operation and maintenance	0	0
Depreciation	0	0
Taxes, other than income taxes	0	0
Total expenses	0	0
Total operating income	(42)	(7)
Allowance for equity funds used during construction	0	0
Equity in earnings of subsidiaries	(9,325)	(8,603)
Retirement defined benefits expense—other than service costs	0	0
Interest expense and other charges, net	42	7
Allowance for borrowed funds used during construction	0	0
Income before income taxes	(9,325)	(8,603)
Income taxes	0	0
Net income	(9,325)	(8,603)
Preferred stock dividends of subsidiaries	0	0
Net income attributable to Hawaiian Electric	(9,325)	(8,603)
Preferred stock dividends of Hawaiian Electric	0	0
Net income for common stock	(9,325)	(8,603)
Hawaiian Electric Company, Inc. and Subsidiaries
Condensed Income Statements, Captions [Line Items]
Revenues	570,427	518,611
Expenses
Fuel oil	166,968	144,270
Purchased power	139,910	127,124
Other operation and maintenance	107,610	98,817
Depreciation	50,466	48,216
Taxes, other than income taxes	54,104	49,823
Total expenses	519,058	468,250
Total operating income	51,369	50,361
Allowance for equity funds used during construction	3,294	2,399
Equity in earnings of subsidiaries	0	0
Retirement defined benefits expense—other than service costs	(1,264)	(1,423)
Interest expense and other charges, net	(17,694)	(17,504)
Allowance for borrowed funds used during construction	1,444	889
Income before income taxes	37,149	34,722
Income taxes	9,175	12,758
Net income	27,974	21,964
Preferred stock dividends of subsidiaries	229	229
Net income attributable to Hawaiian Electric	27,745	21,735
Preferred stock dividends of Hawaiian Electric	270	270
Net income for common stock	$ 27,475	$ 21,465

Electric utility segment - Co40

Electric utility segment - Condensed consolidating statement of comprehensive income (loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Condensed Statement of Income Captions [Line Items]
Net income for common stock	$ 40,247	$ 34,193
Derivatives qualifying as cash flow hedges:
Reclassification adjustment to net income, net of tax benefits	0	454
Retirement benefit plans:
Adjustment for amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of tax benefits of $___, $2,160, $___ and $4,221, respectively	5,146	3,921
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of taxes	(4,622)	(3,613)
Other comprehensive income (loss), net of taxes	(12,773)	985
Comprehensive income attributable to Hawaiian Electric Industries, Inc.	27,474	35,178
Hawaiian Electric Company
Condensed Statement of Income Captions [Line Items]
Net income for common stock	27,475	21,465
Derivatives qualifying as cash flow hedges:
Reclassification adjustment to net income, net of tax benefits		454
Retirement benefit plans:
Adjustment for amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of tax benefits of $___, $2,160, $___ and $4,221, respectively	4,653	3,618
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of taxes	(4,622)	(3,613)
Other comprehensive income (loss), net of taxes	31	459
Comprehensive income attributable to Hawaiian Electric Industries, Inc.	27,506	21,924
HELCO
Condensed Statement of Income Captions [Line Items]
Net income for common stock	6,101	4,584
Derivatives qualifying as cash flow hedges:
Reclassification adjustment to net income, net of tax benefits		0
Retirement benefit plans:
Adjustment for amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of tax benefits of $___, $2,160, $___ and $4,221, respectively	675	503
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of taxes	(675)	(503)
Other comprehensive income (loss), net of taxes	0	0
Comprehensive income attributable to Hawaiian Electric Industries, Inc.	6,101	4,584
Maui Electric
Condensed Statement of Income Captions [Line Items]
Net income for common stock	3,224	4,019
Derivatives qualifying as cash flow hedges:
Reclassification adjustment to net income, net of tax benefits		0
Retirement benefit plans:
Adjustment for amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of tax benefits of $___, $2,160, $___ and $4,221, respectively	562	466
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of taxes	(562)	(467)
Other comprehensive income (loss), net of taxes	0	(1)
Comprehensive income attributable to Hawaiian Electric Industries, Inc.	3,224	4,018
Other subsidiaries
Condensed Statement of Income Captions [Line Items]
Net income for common stock	0	0
Derivatives qualifying as cash flow hedges:
Reclassification adjustment to net income, net of tax benefits		0
Retirement benefit plans:
Adjustment for amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of tax benefits of $___, $2,160, $___ and $4,221, respectively	0	0
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of taxes	0	0
Other comprehensive income (loss), net of taxes	0	0
Comprehensive income attributable to Hawaiian Electric Industries, Inc.	0	0
Consolidating adjustments
Condensed Statement of Income Captions [Line Items]
Net income for common stock	(9,325)	(8,603)
Derivatives qualifying as cash flow hedges:
Reclassification adjustment to net income, net of tax benefits		0
Retirement benefit plans:
Adjustment for amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of tax benefits of $___, $2,160, $___ and $4,221, respectively	(1,237)	(969)
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of taxes	1,237	970
Other comprehensive income (loss), net of taxes	0	1
Comprehensive income attributable to Hawaiian Electric Industries, Inc.	(9,325)	(8,602)
Hawaiian Electric Company, Inc. and Subsidiaries
Condensed Statement of Income Captions [Line Items]
Net income for common stock	27,475	21,465
Derivatives qualifying as cash flow hedges:
Reclassification adjustment to net income, net of tax benefits	0	454
Retirement benefit plans:
Adjustment for amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of tax benefits of $___, $2,160, $___ and $4,221, respectively	4,653	3,618
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of taxes	(4,622)	(3,613)
Other comprehensive income (loss), net of taxes	31	459
Comprehensive income attributable to Hawaiian Electric Industries, Inc.	$ 27,506	$ 21,924

Electric utility segment - Co41

Electric utility segment - Condensed consolidating balance sheet (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Utility property, plant and equipment
Total property, plant and equipment, net	$ 4,542,558	$ 4,460,248
Current assets
Cash and cash equivalents	244,785	261,881	$ 234,230	$ 278,452
Other long-term assets
Total assets	12,702,718	12,534,160
Capitalization
Common stock equity	2,091,777	2,097,386	2,065,588	2,066,753
Cumulative preferred stock—not subject to mandatory redemption	0	0
Current liabilities
Interest and preferred dividends payable	29,786	25,837
Deferred credits and other liabilities
Total liabilities and shareholders’ equity	12,702,718	12,534,160
Hawaiian Electric Company
Utility property, plant and equipment
Land	44,001	43,972
Plant and equipment	4,176,161	4,140,892
Less accumulated depreciation	(1,472,313)	(1,451,612)
Construction in progress	256,058	231,571
Utility property, plant and equipment, net	3,003,907	2,964,823
Nonutility property, plant and equipment, less accumulated depreciation	5,935	5,933
Total property, plant and equipment, net	3,009,842	2,970,756
Investment in wholly owned subsidiaries, at equity	559,511	557,013
Current assets
Cash and cash equivalents	11,988	2,059	8,617	61,388
Advances to affiliates	3,000	0
Customer accounts receivable, net	97,943	86,987
Accrued unbilled revenues, net	70,618	77,176
Other accounts receivable, net	10,019	11,376
Fuel oil stock, at average cost	66,294	64,972
Materials and supplies, at average cost	29,420	28,325
Prepayments and other	22,811	17,928
Regulatory assets	87,449	76,203
Total current assets	399,542	365,026
Other long-term assets
Regulatory assets	549,020	557,464
Other	63,792	60,157
Total other long-term assets	612,812	617,621
Total assets	4,581,707	4,510,416
Capitalization
Common stock equity	1,846,955	1,845,283	1,799,769	1,799,787
Cumulative preferred stock—not subject to mandatory redemption	22,293	22,293
Long-term debt, net	925,065	924,979
Total capitalization	2,794,313	2,792,555
Current liabilities
Current portion of long-term debt	29,984	29,978
Short-term borrowings from non-affiliates	121,983	4,999
Short-term borrowings from affiliate	0	12,000
Accounts payable	102,402	121,328
Interest and preferred dividends payable	18,422	15,677
Taxes accrued, including revenue taxes	107,968	133,839
Regulatory liabilities	2,612	607
Other	45,137	43,121
Total current liabilities	428,508	361,549
Deferred credits and other liabilities
Deferred income taxes	281,581	281,223
Regulatory liabilities	620,758	613,329
Unamortized tax credits	60,318	59,039
Defined benefit pension and other postretirement benefit plans liability	335,674	340,983
Other	60,555	61,738
Total deferred credits and other liabilities	1,358,886	1,356,312
Total liabilities and shareholders’ equity	4,581,707	4,510,416
HELCO
Utility property, plant and equipment
Land	5,923	6,189
Plant and equipment	1,212,692	1,206,776
Less accumulated depreciation	(534,083)	(528,024)
Construction in progress	10,150	8,182
Utility property, plant and equipment, net	694,682	693,123
Nonutility property, plant and equipment, less accumulated depreciation	115	115
Total property, plant and equipment, net	694,797	693,238
Investment in wholly owned subsidiaries, at equity	0	0
Current assets
Cash and cash equivalents	5,080	4,025	2,952	10,749
Advances to affiliates	0	0
Customer accounts receivable, net	24,117	22,510
Accrued unbilled revenues, net	15,182	15,940
Other accounts receivable, net	1,973	2,268
Fuel oil stock, at average cost	9,501	8,698
Materials and supplies, at average cost	8,591	8,041
Prepayments and other	3,661	4,514
Regulatory assets	6,698	5,038
Total current assets	74,803	71,034
Other long-term assets
Regulatory assets	120,529	122,783
Other	17,751	16,311
Total other long-term assets	138,280	139,094
Total assets	907,880	903,366
Capitalization
Common stock equity	288,927	286,647	292,001	291,291
Cumulative preferred stock—not subject to mandatory redemption	7,000	7,000
Long-term debt, net	202,725	202,701
Total capitalization	498,652	496,348
Current liabilities
Current portion of long-term debt	10,994	10,992
Short-term borrowings from non-affiliates	0	0
Short-term borrowings from affiliate	3,000	0
Accounts payable	17,867	17,855
Interest and preferred dividends payable	4,006	4,174
Taxes accrued, including revenue taxes	33,213	34,950
Regulatory liabilities	2,387	1,245
Other	9,127	9,818
Total current liabilities	80,594	79,034
Deferred credits and other liabilities
Deferred income taxes	55,093	56,955
Regulatory liabilities	172,193	169,139
Unamortized tax credits	16,315	16,167
Defined benefit pension and other postretirement benefit plans liability	65,340	66,447
Other	19,693	19,276
Total deferred credits and other liabilities	328,634	327,984
Total liabilities and shareholders’ equity	907,880	903,366
Maui Electric
Utility property, plant and equipment
Land	3,016	3,016
Plant and equipment	1,063,362	1,053,372
Less accumulated depreciation	(501,546)	(496,716)
Construction in progress	25,729	23,341
Utility property, plant and equipment, net	590,561	583,013
Nonutility property, plant and equipment, less accumulated depreciation	1,532	1,532
Total property, plant and equipment, net	592,093	584,545
Investment in wholly owned subsidiaries, at equity	0	0
Current assets
Cash and cash equivalents	6,230	6,332	1,537	2,048
Advances to affiliates	0	12,000
Customer accounts receivable, net	19,373	18,392
Accrued unbilled revenues, net	13,835	13,938
Other accounts receivable, net	1,314	1,210
Fuel oil stock, at average cost	12,928	13,203
Materials and supplies, at average cost	17,681	18,031
Prepayments and other	3,736	2,913
Regulatory assets	8,653	7,149
Total current assets	83,750	93,168
Other long-term assets
Regulatory assets	100,150	100,660
Other	16,752	15,061
Total other long-term assets	116,902	115,721
Total assets	792,745	793,434
Capitalization
Common stock equity	270,483	270,265	260,586	259,554
Cumulative preferred stock—not subject to mandatory redemption	5,000	5,000
Long-term debt, net	190,864	190,836
Total capitalization	466,347	466,101
Current liabilities
Current portion of long-term debt	8,995	8,993
Short-term borrowings from non-affiliates	0	0
Short-term borrowings from affiliate	0	0
Accounts payable	22,130	20,427
Interest and preferred dividends payable	3,791	2,735
Taxes accrued, including revenue taxes	25,284	30,312
Regulatory liabilities	1,934	1,549
Other	14,949	14,197
Total current liabilities	77,083	78,213
Deferred credits and other liabilities
Deferred income taxes	56,415	55,863
Regulatory liabilities	95,209	94,901
Unamortized tax credits	15,303	15,163
Defined benefit pension and other postretirement benefit plans liability	64,612	65,518
Other	17,776	17,675
Total deferred credits and other liabilities	249,315	249,120
Total liabilities and shareholders’ equity	792,745	793,434
Other subsidiaries
Utility property, plant and equipment
Land	0	0
Plant and equipment	0	0
Less accumulated depreciation	0	0
Construction in progress	0	0
Utility property, plant and equipment, net	0	0
Nonutility property, plant and equipment, less accumulated depreciation	0	0
Total property, plant and equipment, net	0	0
Investment in wholly owned subsidiaries, at equity	0	0
Current assets
Cash and cash equivalents	101	101	101	101
Advances to affiliates	0	0
Customer accounts receivable, net	0	0
Accrued unbilled revenues, net	0	0
Other accounts receivable, net	0	0
Fuel oil stock, at average cost	0	0
Materials and supplies, at average cost	0	0
Prepayments and other	0	0
Regulatory assets	0	0
Total current assets	101	101
Other long-term assets
Regulatory assets	0	0
Other	0	0
Total other long-term assets	0	0
Total assets	101	101
Capitalization
Common stock equity	101	101	101	101
Cumulative preferred stock—not subject to mandatory redemption	0	0
Long-term debt, net	0	0
Total capitalization	101	101
Current liabilities
Current portion of long-term debt	0	0
Short-term borrowings from non-affiliates	0	0
Short-term borrowings from affiliate	0	0
Accounts payable	0	0
Interest and preferred dividends payable	0	0
Taxes accrued, including revenue taxes	0	0
Regulatory liabilities	0	0
Other	0	0
Total current liabilities	0	0
Deferred credits and other liabilities
Deferred income taxes	0	0
Regulatory liabilities	0	0
Unamortized tax credits	0	0
Defined benefit pension and other postretirement benefit plans liability	0	0
Other	0	0
Total deferred credits and other liabilities	0	0
Total liabilities and shareholders’ equity	101	101
Consolidating adjustments
Utility property, plant and equipment
Land	0	0
Plant and equipment	0	0
Less accumulated depreciation	0	0
Construction in progress	0	0
Utility property, plant and equipment, net	0	0
Nonutility property, plant and equipment, less accumulated depreciation	0	0
Total property, plant and equipment, net	0	0
Investment in wholly owned subsidiaries, at equity	(559,511)	(557,013)
Current assets
Cash and cash equivalents	0	0	0	0
Advances to affiliates	(3,000)	(12,000)
Customer accounts receivable, net	0	0
Accrued unbilled revenues, net	0	0
Other accounts receivable, net	(9,353)	(7,691)
Fuel oil stock, at average cost	0	0
Materials and supplies, at average cost	0	0
Prepayments and other	0	0
Regulatory assets	0	0
Total current assets	(12,353)	(19,691)
Other long-term assets
Regulatory assets	0	0
Other	0	0
Total other long-term assets	0	0
Total assets	(571,864)	(576,704)
Capitalization
Common stock equity	(559,511)	(557,013)	(552,688)	(550,946)
Cumulative preferred stock—not subject to mandatory redemption	0	0
Long-term debt, net	0	0
Total capitalization	(559,511)	(557,013)
Current liabilities
Current portion of long-term debt	0	0
Short-term borrowings from non-affiliates	0	0
Short-term borrowings from affiliate	(3,000)	(12,000)
Accounts payable	0	0
Interest and preferred dividends payable	(15)	(11)
Taxes accrued, including revenue taxes	0	0
Regulatory liabilities	0	0
Other	(9,338)	(7,680)
Total current liabilities	(12,353)	(19,691)
Deferred credits and other liabilities
Deferred income taxes	0	0
Regulatory liabilities	0	0
Unamortized tax credits	0	0
Defined benefit pension and other postretirement benefit plans liability	0	0
Other	0	0
Total deferred credits and other liabilities	0	0
Total liabilities and shareholders’ equity	(571,864)	(576,704)
Hawaiian Electric Company, Inc. and Subsidiaries
Utility property, plant and equipment
Land	52,940	53,177
Plant and equipment	6,452,215	6,401,040
Less accumulated depreciation	(2,507,942)	(2,476,352)
Construction in progress	291,937	263,094
Utility property, plant and equipment, net	4,289,150	4,240,959
Nonutility property, plant and equipment, less accumulated depreciation	7,582	7,580
Total property, plant and equipment, net	4,296,732	4,248,539
Investment in wholly owned subsidiaries, at equity	0	0
Current assets
Cash and cash equivalents	23,399	12,517	13,207	74,286
Advances to affiliates	0	0
Customer accounts receivable, net	141,433	127,889
Accrued unbilled revenues, net	99,635	107,054
Other accounts receivable, net	3,953	7,163
Fuel oil stock, at average cost	88,723	86,873
Materials and supplies, at average cost	55,692	54,397
Prepayments and other	30,208	25,355
Regulatory assets	102,800	88,390
Total current assets	545,843	509,638
Other long-term assets
Regulatory assets	769,699	780,907
Other	98,295	91,529
Total other long-term assets	867,994	872,436
Total assets	5,710,569	5,630,613
Capitalization
Common stock equity	1,846,955	1,845,283	$ 1,799,769	$ 1,799,787
Cumulative preferred stock—not subject to mandatory redemption	34,293	34,293
Long-term debt, net	1,318,654	1,318,516
Total capitalization	3,199,902	3,198,092
Current liabilities
Current portion of long-term debt	49,973	49,963
Short-term borrowings from non-affiliates	121,983	4,999
Short-term borrowings from affiliate	0	0
Accounts payable	142,399	159,610
Interest and preferred dividends payable	26,204	22,575
Taxes accrued, including revenue taxes	166,465	199,101
Regulatory liabilities	6,933	3,401
Other	59,875	59,456
Total current liabilities	573,832	499,105
Deferred credits and other liabilities
Deferred income taxes	393,089	394,041
Regulatory liabilities	888,160	877,369
Unamortized tax credits	91,936	90,369
Defined benefit pension and other postretirement benefit plans liability	465,626	472,948
Other	98,024	98,689
Total deferred credits and other liabilities	1,936,835	1,933,416
Total liabilities and shareholders’ equity	$ 5,710,569	$ 5,630,613

Electric utility segment - Co42

Electric utility segment - Condensed consolidating statement of changes in common stock equity (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Increase (decrease) in stockholders' equity
Beginning Balance	$ 2,097,386	$ 2,066,753
Net income for common stock	40,247	34,193
Other comprehensive income (loss), net of taxes	(12,773)	985
Common stock dividends	(33,741)	(33,713)
Ending Balance	2,091,777	2,065,588
Hawaiian Electric Company
Increase (decrease) in stockholders' equity
Beginning Balance	1,845,283	1,799,787
Net income for common stock	27,475	21,465
Other comprehensive income (loss), net of taxes	31	459
Common stock dividends	(25,826)	(21,942)
Common stock issuance expenses	(8)
Ending Balance	1,846,955	1,799,769
HELCO
Increase (decrease) in stockholders' equity
Beginning Balance	286,647	291,291
Net income for common stock	6,101	4,584
Other comprehensive income (loss), net of taxes	0	0
Common stock dividends	(3,821)	(3,874)
Common stock issuance expenses	0
Ending Balance	288,927	292,001
Maui Electric
Increase (decrease) in stockholders' equity
Beginning Balance	270,265	259,554
Net income for common stock	3,224	4,019
Other comprehensive income (loss), net of taxes	0	(1)
Common stock dividends	(3,006)	(2,986)
Common stock issuance expenses	0
Ending Balance	270,483	260,586
Other subsidiaries
Increase (decrease) in stockholders' equity
Beginning Balance	101	101
Net income for common stock	0	0
Other comprehensive income (loss), net of taxes	0	0
Common stock dividends	0	0
Common stock issuance expenses	0
Ending Balance	101	101
Consolidating adjustments
Increase (decrease) in stockholders' equity
Beginning Balance	(557,013)	(550,946)
Net income for common stock	(9,325)	(8,603)
Other comprehensive income (loss), net of taxes	0	1
Common stock dividends	6,827	6,860
Common stock issuance expenses	0
Ending Balance	(559,511)	(552,688)
Hawaiian Electric Company, Inc. and Subsidiaries
Increase (decrease) in stockholders' equity
Beginning Balance	1,845,283	1,799,787
Net income for common stock	27,475	21,465
Other comprehensive income (loss), net of taxes	31	459
Common stock dividends	(25,826)	(21,942)
Common stock issuance expenses	(8)
Ending Balance	$ 1,846,955	$ 1,799,769

Electric utility segment - Co43

Electric utility segment - Condensed consolidating statement of cash flows (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities
Net income	$ 40,720	$ 34,666
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of property, plant and equipment	53,091	50,051
Other amortization	8,745	2,372
Deferred income taxes	(2,889)	10,096
Allowance for equity funds used during construction	(3,294)	(2,399)
Other	2,150	(347)
Changes in assets and liabilities
Decrease (increase) in fuel oil stock	(1,704)	(7,444)
Increase in regulatory assets	(16,900)	5,909
Change in prepaid and accrued income taxes, tax credits and revenue taxes	(29,842)	(42,175)
Decrease in defined benefit pension and other postretirement benefit plans liability	(390)	1,012
Net cash provided by operating activities	34,677	46,991
Cash flows from investing activities
Capital expenditures	(133,352)	(91,242)
Contributions in aid of construction	4,330	10,650
Other	2,593	5,709
Net cash used in investing activities	(231,051)	(184,481)
Cash flows from financing activities
Common stock dividends	(33,741)	(33,713)
Net increase in short-term borrowings from non-affiliates and affiliate with original maturities of three months or less	120,485	2,300
Other	(4,043)	(4,857)
Net cash provided by financing activities	179,278	93,268
Net decrease in cash and cash equivalents	(17,096)	(44,222)
Cash and cash equivalents, beginning of period	261,881	278,452
Cash and cash equivalents, end of period	244,785	234,230
Hawaiian Electric Company
Cash flows from operating activities
Net income	27,745	21,735
Adjustments to reconcile net income to net cash provided by operating activities:
Equity in earnings of subsidiaries	(9,350)	(8,628)
Common stock dividends received from subsidiaries	6,827	6,910
Depreciation of property, plant and equipment	34,439	32,722
Other amortization	3,237	914
Deferred income taxes	(271)	6,810
Allowance for equity funds used during construction	(2,887)	(2,056)
Other	2,868	661
Changes in assets and liabilities
Increase in accounts receivable	(13,255)	(10,724)
Decrease in accrued unbilled revenues	6,558	(4,577)
Decrease (increase) in fuel oil stock	(1,322)	(9,234)
Decrease (increase) in materials and supplies	(1,095)	(2,267)
Increase in regulatory assets	(13,256)	7,711
Increase (decrease) in accounts payable	(2,028)	21,943
Change in prepaid and accrued income taxes, tax credits and revenue taxes	(25,892)	(32,272)
Decrease in defined benefit pension and other postretirement benefit plans liability	(592)	240
Change in other assets and liabilities	2,976	(4,249)
Net cash provided by operating activities	14,702	25,639
Cash flows from investing activities
Capital expenditures	(84,226)	(64,035)
Contributions in aid of construction	3,327	8,934
Other	269	2,352
Advances (to) from affiliates	(3,000)	0
Net cash used in investing activities	(83,630)	(52,749)
Cash flows from financing activities
Common stock dividends	(25,826)	(21,942)
Preferred stock dividends of Hawaiian Electric and subsidiaries	(270)	(270)
Net increase in short-term borrowings from non-affiliates and affiliate with original maturities of three months or less	104,984	(3,000)
Other	(31)	(449)
Net cash provided by financing activities	78,857	(25,661)
Net decrease in cash and cash equivalents	9,929	(52,771)
Cash and cash equivalents, beginning of period	2,059	61,388
Cash and cash equivalents, end of period	11,988	8,617
HELCO
Cash flows from operating activities
Net income	6,235	4,718
Adjustments to reconcile net income to net cash provided by operating activities:
Equity in earnings of subsidiaries	0	0
Common stock dividends received from subsidiaries	0	0
Depreciation of property, plant and equipment	10,055	9,685
Other amortization	1,554	442
Deferred income taxes	(1,806)	1,700
Allowance for equity funds used during construction	(111)	(115)
Other	(103)	(138)
Changes in assets and liabilities
Increase in accounts receivable	(2,048)	1,239
Decrease in accrued unbilled revenues	758	(319)
Decrease (increase) in fuel oil stock	(803)	1,485
Decrease (increase) in materials and supplies	(550)	(1,114)
Increase in regulatory assets	(1,773)	(677)
Increase (decrease) in accounts payable	4,050	(1,721)
Change in prepaid and accrued income taxes, tax credits and revenue taxes	(1,882)	(5,352)
Decrease in defined benefit pension and other postretirement benefit plans liability	(198)	14
Change in other assets and liabilities	2,875	805
Net cash provided by operating activities	16,253	10,652
Cash flows from investing activities
Capital expenditures	(15,161)	(12,434)
Contributions in aid of construction	656	915
Other	264	78
Advances (to) from affiliates	0	(3,000)
Net cash used in investing activities	(14,241)	(14,441)
Cash flows from financing activities
Common stock dividends	(3,821)	(3,874)
Preferred stock dividends of Hawaiian Electric and subsidiaries	(134)	(134)
Net increase in short-term borrowings from non-affiliates and affiliate with original maturities of three months or less	3,000	0
Other	(2)	0
Net cash provided by financing activities	(957)	(4,008)
Net decrease in cash and cash equivalents	1,055	(7,797)
Cash and cash equivalents, beginning of period	4,025	10,749
Cash and cash equivalents, end of period	5,080	2,952
Maui Electric
Cash flows from operating activities
Net income	3,319	4,114
Adjustments to reconcile net income to net cash provided by operating activities:
Equity in earnings of subsidiaries	0	0
Common stock dividends received from subsidiaries	0	0
Depreciation of property, plant and equipment	5,972	5,809
Other amortization	553	593
Deferred income taxes	497	2,602
Allowance for equity funds used during construction	(296)	(228)
Other	(84)	(87)
Changes in assets and liabilities
Increase in accounts receivable	(1,396)	685
Decrease in accrued unbilled revenues	103	(1,043)
Decrease (increase) in fuel oil stock	275	305
Decrease (increase) in materials and supplies	350	15
Increase in regulatory assets	(1,871)	(1,125)
Increase (decrease) in accounts payable	3,121	(2,991)
Change in prepaid and accrued income taxes, tax credits and revenue taxes	(5,532)	(6,408)
Decrease in defined benefit pension and other postretirement benefit plans liability	(148)	10
Change in other assets and liabilities	349	197
Net cash provided by operating activities	5,212	2,448
Cash flows from investing activities
Capital expenditures	(15,070)	(8,243)
Contributions in aid of construction	347	801
Other	510	272
Advances (to) from affiliates	12,000	7,500
Net cash used in investing activities	(2,213)	330
Cash flows from financing activities
Common stock dividends	(3,006)	(2,986)
Preferred stock dividends of Hawaiian Electric and subsidiaries	(95)	(95)
Net increase in short-term borrowings from non-affiliates and affiliate with original maturities of three months or less	0	0
Other	0	(208)
Net cash provided by financing activities	(3,101)	(3,289)
Net decrease in cash and cash equivalents	(102)	(511)
Cash and cash equivalents, beginning of period	6,332	2,048
Cash and cash equivalents, end of period	6,230	1,537
Other subsidiaries
Cash flows from operating activities
Net income	0	0
Adjustments to reconcile net income to net cash provided by operating activities:
Equity in earnings of subsidiaries	0	0
Common stock dividends received from subsidiaries	0	0
Depreciation of property, plant and equipment	0	0
Other amortization	0	0
Deferred income taxes	0	0
Allowance for equity funds used during construction	0	0
Other	0	0
Changes in assets and liabilities
Increase in accounts receivable	0	0
Decrease in accrued unbilled revenues	0	0
Decrease (increase) in fuel oil stock	0	0
Decrease (increase) in materials and supplies	0	0
Increase in regulatory assets	0	0
Increase (decrease) in accounts payable	0	0
Change in prepaid and accrued income taxes, tax credits and revenue taxes	0	0
Decrease in defined benefit pension and other postretirement benefit plans liability	0	0
Change in other assets and liabilities	0	0
Net cash provided by operating activities	0	0
Cash flows from investing activities
Capital expenditures	0	0
Contributions in aid of construction	0	0
Other	0	0
Advances (to) from affiliates	0	0
Net cash used in investing activities	0	0
Cash flows from financing activities
Common stock dividends	0	0
Preferred stock dividends of Hawaiian Electric and subsidiaries	0	0
Net increase in short-term borrowings from non-affiliates and affiliate with original maturities of three months or less	0	0
Other	0	0
Net cash provided by financing activities	0	0
Net decrease in cash and cash equivalents	0	0
Cash and cash equivalents, beginning of period	101	101
Cash and cash equivalents, end of period	101	101
Consolidating adjustments
Cash flows from operating activities
Net income	(9,325)	(8,603)
Adjustments to reconcile net income to net cash provided by operating activities:
Equity in earnings of subsidiaries	9,325	8,603
Common stock dividends received from subsidiaries	(6,827)	(6,860)
Depreciation of property, plant and equipment	0	0
Other amortization	0	0
Deferred income taxes	0	(48)
Allowance for equity funds used during construction	0	0
Other	0	0
Changes in assets and liabilities
Increase in accounts receivable	1,662	1,472
Decrease in accrued unbilled revenues	0	0
Decrease (increase) in fuel oil stock	0	0
Decrease (increase) in materials and supplies	0	0
Increase in regulatory assets	0	0
Increase (decrease) in accounts payable	0	0
Change in prepaid and accrued income taxes, tax credits and revenue taxes	440	48
Decrease in defined benefit pension and other postretirement benefit plans liability	0	0
Change in other assets and liabilities	(1,662)	(1,472)
Net cash provided by operating activities	(6,387)	(6,860)
Cash flows from investing activities
Capital expenditures	0	0
Contributions in aid of construction	0	0
Other	(440)	0
Advances (to) from affiliates	(9,000)	(4,500)
Net cash used in investing activities	(9,440)	(4,500)
Cash flows from financing activities
Common stock dividends	6,827	6,860
Preferred stock dividends of Hawaiian Electric and subsidiaries	0	0
Net increase in short-term borrowings from non-affiliates and affiliate with original maturities of three months or less	9,000	4,500
Other	0	0
Net cash provided by financing activities	15,827	11,360
Net decrease in cash and cash equivalents	0	0
Cash and cash equivalents, beginning of period	0	0
Cash and cash equivalents, end of period	0	0
Hawaiian Electric Company, Inc. and Subsidiaries
Cash flows from operating activities
Net income	27,974	21,964
Adjustments to reconcile net income to net cash provided by operating activities:
Equity in earnings of subsidiaries	(25)	(25)
Common stock dividends received from subsidiaries	0	50
Depreciation of property, plant and equipment	50,466	48,216
Other amortization	5,344	1,949
Deferred income taxes	(1,580)	11,064
Allowance for equity funds used during construction	(3,294)	(2,399)
Other	2,681	436
Changes in assets and liabilities
Increase in accounts receivable	(15,037)	(7,328)
Decrease in accrued unbilled revenues	7,419	(5,939)
Decrease (increase) in fuel oil stock	(1,850)	(7,444)
Decrease (increase) in materials and supplies	(1,295)	(3,366)
Increase in regulatory assets	(16,900)	5,909
Increase (decrease) in accounts payable	5,143	17,231
Change in prepaid and accrued income taxes, tax credits and revenue taxes	(32,866)	(43,984)
Decrease in defined benefit pension and other postretirement benefit plans liability	(938)	264
Change in other assets and liabilities	4,538	(4,719)
Net cash provided by operating activities	29,780	31,879
Cash flows from investing activities
Capital expenditures	(114,457)	(84,712)
Contributions in aid of construction	4,330	10,650
Other	603	2,702
Advances (to) from affiliates	0	0
Net cash used in investing activities	(109,524)	(71,360)
Cash flows from financing activities
Common stock dividends	(25,826)	(21,942)
Preferred stock dividends of Hawaiian Electric and subsidiaries	(499)	(499)
Net increase in short-term borrowings from non-affiliates and affiliate with original maturities of three months or less	116,984	1,500
Other	(33)	(657)
Net cash provided by financing activities	90,626	(21,598)
Net decrease in cash and cash equivalents	10,882	(61,079)
Cash and cash equivalents, beginning of period	12,517	74,286
Cash and cash equivalents, end of period	$ 23,399	$ 13,207

Bank segment - Income statemen

Bank segment - Income statement data (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Noninterest expense
Income before income taxes	$ 53,276	$ 51,582
Income taxes	12,556	16,916
Net income	40,720	34,666
American Savings Bank (ASB)
Interest and dividend income
Interest and fees on loans	52,800	50,742
Interest and dividends on investment securities	9,202	6,980
Total interest and dividend income	62,002	57,722
Interest expense
Interest on deposit liabilities	2,957	2,103
Interest on other borrowings	496	816
Total interest expense	3,453	2,919
Net interest income	58,549	54,803
Provision for loan losses	3,541	3,907
Net interest income after provision for loan losses	55,008	50,896
Noninterest income
Fees from other financial services	4,654	5,610
Fee income on deposit liabilities	5,189	5,428
Fee income on other financial products	1,654	1,866
Bank-owned life insurance	871	983
Mortgage banking income	613	789
Other income, net	436	458
Total noninterest income	13,417	15,134
Noninterest expense
Compensation and employee benefits	24,440	23,042
Occupancy	4,280	4,154
Data processing	3,464	3,280
Services	3,047	2,360
Equipment	1,728	1,748
Office supplies, printing and postage	1,507	1,535
Marketing	645	517
FDIC insurance	713	728
Other expense	4,101	4,506
Total noninterest expense	43,925	41,870
Income before income taxes	24,500	24,160
Income taxes	5,540	8,347
Net income	$ 18,960	$ 15,813

Bank segment - Reconciliation o

Bank segment - Reconciliation of Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Condensed Income Statements, Captions [Line Items]
Total revenues	$ 645,874	$ 591,562
Less: Retirement defined benefits expense—other than service costs	1,833	1,876
Total expenses	573,985	521,824
Operating income	71,889	69,738
Income before income taxes	53,276	51,582
American Savings Bank (ASB)
Condensed Income Statements, Captions [Line Items]
Interest and dividend income	62,002	57,722
Noninterest income	13,417	15,134
Total revenues	75,419	72,856
Interest Expense	3,453	2,919
Provision for loan losses	3,541	3,907
Noninterest expense	43,925	41,870
Less: Retirement defined benefits expense—other than service costs	(387)	(195)
Total expenses	50,532	48,501
Operating income	24,887	24,355
Income before income taxes	$ 24,500	$ 24,160

Bank segment - Comprehensive i

Bank segment - Comprehensive income data (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Condensed Statement of Income Captions [Line Items]
Net income for common stock	$ 40,247	$ 34,193
Net unrealized gains (losses) on securities:
Net unrealized gains (losses) on available-for-sale investment securities arising during the period, net of (taxes) benefits of $4,867 and $(148), respectively	(13,297)	223
Retirement benefit plans:
Adjustment for amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of tax benefits of $694 and $404, respectively	5,146	3,921
Other comprehensive income (loss), net of taxes	(12,773)	985
Comprehensive income attributable to Hawaiian Electric Industries, Inc.	27,474	35,178
Net unrealized gains (losses) on securities arising during the period, taxes (benefits)	(4,867)	148
Amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, taxes (benefits)	(1,792)	(2,502)
American Savings Bank (ASB)
Condensed Statement of Income Captions [Line Items]
Net income for common stock	18,960	15,813
Net unrealized gains (losses) on securities:
Net unrealized gains (losses) on available-for-sale investment securities arising during the period, net of (taxes) benefits of $4,867 and $(148), respectively	(13,297)	223
Retirement benefit plans:
Adjustment for amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of tax benefits of $694 and $404, respectively	1,222	612
Other comprehensive income (loss), net of taxes	(12,075)	835
Comprehensive income attributable to Hawaiian Electric Industries, Inc.	6,885	16,648
Net unrealized gains (losses) on securities arising during the period, taxes (benefits)	(4,867)	148
Amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, taxes (benefits)	$ (694)	$ (404)

Bank segment - Balance sheet d

Bank segment - Balance sheet data (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Assets
Available-for-sale investment securities, at fair value	$ 1,418,490	$ 1,401,198
Held-to-maturity investment securities, at amortized cost	43,450	44,515
Stock in Federal Home Loan Bank, at cost	10,158	9,706
Allowance for loan losses	(53,895)	(53,637)
Net loans	4,688,129	4,617,131
Loans held for sale, at lower of cost or fair value	7,379	11,250
Other	526,744	513,535
Goodwill	82,190	82,190
Total assets	12,702,718	12,534,160
Liabilities
Other	475,822	521,018
Total liabilities	10,576,648	10,402,481
Commitments and contingencies
Retained earnings	483,342	476,836
Accumulated other comprehensive loss, net of tax benefits
Accumulated other comprehensive loss, net of tax benefits	(54,714)	(41,941)
Total shareholders’ equity	2,091,777	2,097,386	$ 2,065,588	$ 2,066,753
Total liabilities and shareholders’ equity	12,702,718	12,534,160
Other assets
Premises and equipment, net	4,542,558	4,460,248
Total Other Assets	526,744	513,535
Other liabilities
Total other liabilities	475,822	521,018
Balance Sheet related disclosures
Held-to-maturity investment securities	42,491	44,412
Securities sold under agreements to repurchase	50,000	141,000
American Savings Bank (ASB)
Assets
Cash and due from banks	123,580	140,934
Interest-bearing deposits	90,643	93,165
Available-for-sale investment securities, at fair value	1,418,490	1,401,198
Held-to-maturity investment securities, at amortized cost	43,450	44,515
Stock in Federal Home Loan Bank, at cost	10,158	9,706
Loans held for investment	4,742,024	4,670,768
Allowance for loan losses	(53,895)	(53,637)
Net loans	4,688,129	4,617,131
Loans held for sale, at lower of cost or fair value	7,379	11,250
Other	425,426	398,570
Goodwill	82,190	82,190
Total assets	6,889,445	6,798,659
Liabilities
Deposit liabilities—noninterest-bearing	1,795,114	1,760,233
Deposit liabilities—interest-bearing	4,283,953	4,130,364
Other borrowings	100,430	190,859
Other	106,482	110,356
Total liabilities	6,285,979	6,191,812
Commitments and contingencies
Common stock	1	1
Additional paid in capital	345,652	345,018
Retained earnings	300,837	292,957
Accumulated other comprehensive loss, net of tax benefits
Net unrealized losses on securities	(28,248)	(14,951)
Retirement benefit plans	(14,776)	(16,178)
Accumulated other comprehensive loss, net of tax benefits	(43,024)	(31,129)
Total shareholders’ equity	603,466	606,847
Total liabilities and shareholders’ equity	6,889,445	6,798,659
Other assets
Bank-owned life insurance	149,656	148,775
Premises and equipment, net	164,702	136,270
Prepaid expenses	4,549	3,961
Accrued interest receivable	18,461	18,724
Mortgage-servicing rights	8,541	8,639
Low-income housing equity investments	57,222	59,016
Real estate acquired in settlement of loans, net	0	133
Other	22,295	23,052
Total Other Assets	425,426	398,570
Other liabilities
Accrued expenses	49,034	39,312
Federal and state income taxes payable	1,369	3,736
Cashier’s checks	22,990	27,000
Advance payments by borrowers	6,255	10,245
Other	26,834	30,063
Total other liabilities	106,482	110,356
Balance Sheet related disclosures
Held-to-maturity investment securities	42,491	44,412
Securities sold under agreements to repurchase	50,000	141,000
Advances from Federal Home Loan Bank	$ 50,000	$ 50,000

Bank segment - Components of i

Bank segment - Components of investment securities (Details) $ in Thousands	Mar. 31, 2018USD ($)issue	Dec. 31, 2017USD ($)issue
Available-for-sale
Amortized cost	$ 1,457,078	$ 1,421,622
Gross unrealized gains	553	1,231
Gross unrealized losses	(39,141)	(21,655)
Estimated fair value	$ 1,418,490	$ 1,401,198
Available-for-sale Securities, Continuous Unrealized Loss Position
Less than 12 months: Number of issues | issue	104	82
Less than 12 months: Fair value	$ 855,970	$ 736,772
Less than 12 months: Amount	$ (18,585)	$ (7,664)
12 months or longer: Number of Issues | issue	88	85
12 months or longer: Fair value	$ 516,365	$ 522,208
12 months or longer: Amount	(20,556)	(13,991)
Held-to-maturity Securities, Classified [Abstract]
Amortized cost	43,450	44,515
Gross unrealized gains	0	1
Gross unrealized losses	(959)	(104)
Held-to-maturity investment securities	$ 42,491	$ 44,412
Held-to-maturity Securities, Continuous Unrealized Loss Position
Less Than 12 Months: Number Of Issues | issue	3	2
Less than 12 Months: Fair value	$ 42,491	$ 35,744
Less than 12 Months: Amount	$ (959)	$ (104)
12 months or longer: Number of issues | issue	0	0
12 months or longer: Fair value	$ 0	$ 0
12 months or longer: Amount	0	0
U.S. Treasury and federal agency obligations
Available-for-sale
Amortized cost	181,919	185,891
Gross unrealized gains	164	438
Gross unrealized losses	(3,255)	(2,031)
Estimated fair value	$ 178,828	$ 184,298
Available-for-sale Securities, Continuous Unrealized Loss Position
Less than 12 months: Number of issues | issue	18	15
Less than 12 months: Fair value	$ 93,034	$ 83,137
Less than 12 months: Amount	$ (1,424)	$ (825)
12 months or longer: Number of Issues | issue	9	8
12 months or longer: Fair value	$ 68,489	$ 62,296
12 months or longer: Amount	(1,831)	(1,206)
Mortgage-related securities- FNMA, FHLMC and GNMA
Available-for-sale
Amortized cost	1,259,732	1,220,304
Gross unrealized gains	389	793
Gross unrealized losses	(35,886)	(19,624)
Estimated fair value	$ 1,224,235	$ 1,201,473
Available-for-sale Securities, Continuous Unrealized Loss Position
Less than 12 months: Number of issues | issue	86	67
Less than 12 months: Fair value	$ 762,936	$ 653,635
Less than 12 months: Amount	$ (17,161)	$ (6,839)
12 months or longer: Number of Issues | issue	79	77
12 months or longer: Fair value	$ 447,876	$ 459,912
12 months or longer: Amount	(18,725)	(12,785)
Held-to-maturity Securities, Classified [Abstract]
Amortized cost	43,450	44,515
Gross unrealized gains	0	1
Gross unrealized losses	(959)	(104)
Held-to-maturity investment securities	$ 42,491	$ 44,412
Held-to-maturity Securities, Continuous Unrealized Loss Position
Less Than 12 Months: Number Of Issues | issue	3	2
Less than 12 Months: Fair value	$ 42,491	$ 35,744
Less than 12 Months: Amount	$ (959)	$ (104)
12 months or longer: Number of issues | issue	0	0
12 months or longer: Fair value	$ 0	$ 0
12 months or longer: Amount	0	0
Mortgage revenue bond
Available-for-sale
Amortized cost	15,427	15,427
Gross unrealized gains	0	0
Gross unrealized losses	0	0
Estimated fair value	$ 15,427	$ 15,427
Available-for-sale Securities, Continuous Unrealized Loss Position
Less than 12 months: Number of issues | issue	0	0
Less than 12 months: Fair value	$ 0	$ 0
Less than 12 months: Amount	$ 0	$ 0
12 months or longer: Number of Issues | issue	0	0
12 months or longer: Fair value	$ 0	$ 0
12 months or longer: Amount	$ 0	$ 0

Bank segment - Contractual mat

Bank segment - Contractual maturities of securities (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Available-for-sale Securities, Debt Maturities [Abstract]
Due in one year or less	$ 15,000
Due after one year through five years	83,983
Due after five years through ten years	69,986
Due after ten years	28,377
Total amortized cost	197,346
Mortgage-related securities-FNMA, FHLMC and GNMA	1,259,732
Amortized cost	1,457,078	$ 1,421,622
Held-to-Maturity, Debt Securities, Amortized Cost [Abstract]
Mortgage-related securities-FNMA, FHLMC and GNMA	43,450
Amortized cost	43,450	44,515
Available-for-sale Securities, Debt Securities, Fair Value [Abstract]
Due in one year or less	14,902
Due after one year through five years	82,887
Due after five years through ten years	68,521
Due after ten years	27,945
Total fair value	194,255
Mortgage-related securities-FNMA, FHLMC and GNMA	1,224,235
Total available-for-sale securities	1,418,490	1,401,198
Held-to-maturity Securities, Debt Securities, Fair Value [Abstract]
Mortgage-related securities-FNMA, FHLMC and GNMA	42,491
Total held-to-maturity securities	$ 42,491	$ 44,412

Bank segment - Available-for-sa

Bank segment - Available-for-sale securities, narrative (Details) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Schedule of Available-for-sale Securities [Line Items]
Proceeds from sale of available for sale securities	$ 0
AFS, gross realized gains	$ 0
Mortgage-related securities - FNMA, FHLMC and GNMA
Schedule of Available-for-sale Securities [Line Items]
Proceeds from sale of available for sale securities		$ 0
AFS, gross realized gains		$ 0

Bank segment - Loans receivabl

Bank segment - Loans receivable (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	$ 4,742,680	$ 4,671,577
Less: Deferred fees and discounts	(656)	(809)
Allowance for loan losses	(53,895)	(53,637)
Net loans	$ 4,688,129	4,617,131
Minimum benchmark percentage of loan to appraisal ratio which mortgage insurance is required	80.00%
Real estate loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	$ 3,944,051	3,903,185
Residential 1-4 family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	2,116,121	2,118,047
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	766,522	733,106
Home equity line of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	914,941	913,052
Residential land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	16,569	15,797
Commercial construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	114,535	108,273
Residential construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	15,363	14,910
Commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	568,371	544,828
Consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	$ 230,258	$ 223,564

Bank segment - Allowance for l

Bank segment - Allowance for loan losses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Allowance for loan losses:
Valuation allowance, balance at the beginning of the period	$ 53,637	$ 55,533
Charge-offs	(4,873)	(4,340)
Recoveries	1,590	897
Provision	3,541	3,907
Valuation allowance, balance at the end of the period	53,895	55,997
Ending balance: individually evaluated for impairment	2,706		$ 2,730
Ending balance: collectively evaluated for impairment	51,189		50,907
Financing Receivables:
Total financing receivables	4,742,680		4,671,577
Ending balance: individually evaluated for impairment	34,631		33,393
Ending balance: collectively evaluated for impairment	4,708,049		4,638,184
Residential 1-4 family
Allowance for loan losses:
Valuation allowance, balance at the beginning of the period	2,902	2,873
Charge-offs	(31)	(6)
Recoveries	54	9
Provision	(400)	(95)
Valuation allowance, balance at the end of the period	2,525	2,781
Ending balance: individually evaluated for impairment	1,207		1,248
Ending balance: collectively evaluated for impairment	1,318		1,654
Financing Receivables:
Total financing receivables	2,116,121		2,118,047
Ending balance: individually evaluated for impairment	17,728		18,284
Ending balance: collectively evaluated for impairment	2,098,393		2,099,763
Commercial real estate
Allowance for loan losses:
Valuation allowance, balance at the beginning of the period	15,796	16,004
Charge-offs	0	0
Recoveries	0	0
Provision	163	500
Valuation allowance, balance at the end of the period	15,959	16,504
Ending balance: individually evaluated for impairment	68		65
Ending balance: collectively evaluated for impairment	15,891		15,731
Financing Receivables:
Total financing receivables	766,522		733,106
Ending balance: individually evaluated for impairment	1,004		1,016
Ending balance: collectively evaluated for impairment	765,518		732,090
Home equity line of credit
Allowance for loan losses:
Valuation allowance, balance at the beginning of the period	7,522	5,039
Charge-offs	0	(14)
Recoveries	14	91
Provision	446	301
Valuation allowance, balance at the end of the period	7,982	5,417
Ending balance: individually evaluated for impairment	892		647
Ending balance: collectively evaluated for impairment	7,090		6,875
Financing Receivables:
Total financing receivables	914,941		913,052
Ending balance: individually evaluated for impairment	10,265		8,188
Ending balance: collectively evaluated for impairment	904,676		904,864
Residential land
Allowance for loan losses:
Valuation allowance, balance at the beginning of the period	896	1,738
Charge-offs	(8)	0
Recoveries	5	203
Provision	(219)	(462)
Valuation allowance, balance at the end of the period	674	1,479
Ending balance: individually evaluated for impairment	17		47
Ending balance: collectively evaluated for impairment	657		849
Financing Receivables:
Total financing receivables	16,569		15,797
Ending balance: individually evaluated for impairment	1,184		1,265
Ending balance: collectively evaluated for impairment	15,385		14,532
Commercial construction
Allowance for loan losses:
Valuation allowance, balance at the beginning of the period	4,671	6,449
Charge-offs	0	0
Recoveries	0	0
Provision	(310)	808
Valuation allowance, balance at the end of the period	4,361	7,257
Ending balance: individually evaluated for impairment	0		0
Ending balance: collectively evaluated for impairment	4,361		4,671
Financing Receivables:
Total financing receivables	114,535		108,273
Ending balance: individually evaluated for impairment	0		0
Ending balance: collectively evaluated for impairment	114,535		108,273
Residential construction
Allowance for loan losses:
Valuation allowance, balance at the beginning of the period	12	12
Charge-offs	0	0
Recoveries	0	0
Provision	(8)	(1)
Valuation allowance, balance at the end of the period	4	11
Ending balance: individually evaluated for impairment	0		0
Ending balance: collectively evaluated for impairment	4		12
Financing Receivables:
Total financing receivables	15,363		14,910
Ending balance: individually evaluated for impairment	0		0
Ending balance: collectively evaluated for impairment	15,363		14,910
Commercial loans
Allowance for loan losses:
Valuation allowance, balance at the beginning of the period	10,851	16,618
Charge-offs	(602)	(1,510)
Recoveries	1,170	297
Provision	(1,064)	(503)
Valuation allowance, balance at the end of the period	10,355	14,902
Ending balance: individually evaluated for impairment	519		694
Ending balance: collectively evaluated for impairment	9,836		10,157
Financing Receivables:
Total financing receivables	568,371		544,828
Ending balance: individually evaluated for impairment	4,385		4,574
Ending balance: collectively evaluated for impairment	563,986		540,254
Consumer loans
Allowance for loan losses:
Valuation allowance, balance at the beginning of the period	10,987	6,800
Charge-offs	(4,232)	(2,810)
Recoveries	347	297
Provision	4,933	3,359
Valuation allowance, balance at the end of the period	12,035	7,646
Ending balance: individually evaluated for impairment	3		29
Ending balance: collectively evaluated for impairment	12,032		10,958
Financing Receivables:
Total financing receivables	230,258		223,564
Ending balance: individually evaluated for impairment	65		66
Ending balance: collectively evaluated for impairment	230,193		223,498
Unallocated
Allowance for loan losses:
Valuation allowance, balance at the beginning of the period	0	0
Charge-offs	0	0
Recoveries	0	0
Provision	0	0
Valuation allowance, balance at the end of the period	0	$ 0
Ending balance: collectively evaluated for impairment	$ 0		$ 0

Bank segment - Credit risk pro

Bank segment - Credit risk profile - assigned grades (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Credit risk profile by internally assigned grade for loans
Loans and leases receivable before fees, gross	$ 4,742,680	$ 4,671,577
Commercial real estate
Credit risk profile by internally assigned grade for loans
Loans and leases receivable before fees, gross	766,522	733,106
Commercial real estate | Pass
Credit risk profile by internally assigned grade for loans
Loans and leases receivable before fees, gross	667,555	630,877
Commercial real estate | Special mention
Credit risk profile by internally assigned grade for loans
Loans and leases receivable before fees, gross	46,283	49,347
Commercial real estate | Substandard
Credit risk profile by internally assigned grade for loans
Loans and leases receivable before fees, gross	52,684	52,882
Commercial real estate | Doubtful
Credit risk profile by internally assigned grade for loans
Loans and leases receivable before fees, gross	0	0
Commercial real estate | Loss
Credit risk profile by internally assigned grade for loans
Loans and leases receivable before fees, gross	0	0
Commercial construction
Credit risk profile by internally assigned grade for loans
Loans and leases receivable before fees, gross	114,535	108,273
Commercial construction | Pass
Credit risk profile by internally assigned grade for loans
Loans and leases receivable before fees, gross	89,802	83,757
Commercial construction | Special mention
Credit risk profile by internally assigned grade for loans
Loans and leases receivable before fees, gross	22,500	22,500
Commercial construction | Substandard
Credit risk profile by internally assigned grade for loans
Loans and leases receivable before fees, gross	2,233	2,016
Commercial construction | Doubtful
Credit risk profile by internally assigned grade for loans
Loans and leases receivable before fees, gross	0	0
Commercial construction | Loss
Credit risk profile by internally assigned grade for loans
Loans and leases receivable before fees, gross	0	0
Commercial loans
Credit risk profile by internally assigned grade for loans
Loans and leases receivable before fees, gross	568,371	544,828
Commercial loans | Pass
Credit risk profile by internally assigned grade for loans
Loans and leases receivable before fees, gross	518,819	492,942
Commercial loans | Special mention
Credit risk profile by internally assigned grade for loans
Loans and leases receivable before fees, gross	27,876	27,997
Commercial loans | Substandard
Credit risk profile by internally assigned grade for loans
Loans and leases receivable before fees, gross	21,676	23,421
Commercial loans | Doubtful
Credit risk profile by internally assigned grade for loans
Loans and leases receivable before fees, gross	0	468
Commercial loans | Loss
Credit risk profile by internally assigned grade for loans
Loans and leases receivable before fees, gross	$ 0	$ 0

Bank segment - Credit risk p54

Bank segment - Credit risk profile - payment activity (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Credit risk profile based on payment activity for loans
Total past due	$ 20,756	$ 23,603
Current	4,721,924	4,647,974
Total financing receivables	4,742,680	4,671,577
Recorded Investment greater than 90 days and accruing	0	0
30-59 days past due
Credit risk profile based on payment activity for loans
Total past due	7,078	7,237
60-89 days past due
Credit risk profile based on payment activity for loans
Total past due	4,224	6,013
Greater than 90 days
Credit risk profile based on payment activity for loans
Total past due	9,454	10,353
Residential 1-4 family
Credit risk profile based on payment activity for loans
Total past due	7,169	8,318
Current	2,108,952	2,109,729
Total financing receivables	2,116,121	2,118,047
Recorded Investment greater than 90 days and accruing	0	0
Residential 1-4 family | 30-59 days past due
Credit risk profile based on payment activity for loans
Total past due	1,902	1,532
Residential 1-4 family | 60-89 days past due
Credit risk profile based on payment activity for loans
Total past due	662	1,715
Residential 1-4 family | Greater than 90 days
Credit risk profile based on payment activity for loans
Total past due	4,605	5,071
Commercial real estate
Credit risk profile based on payment activity for loans
Total past due	0	0
Current	766,522	733,106
Total financing receivables	766,522	733,106
Recorded Investment greater than 90 days and accruing	0	0
Commercial real estate | 30-59 days past due
Credit risk profile based on payment activity for loans
Total past due	0	0
Commercial real estate | 60-89 days past due
Credit risk profile based on payment activity for loans
Total past due	0	0
Commercial real estate | Greater than 90 days
Credit risk profile based on payment activity for loans
Total past due	0	0
Home equity line of credit
Credit risk profile based on payment activity for loans
Total past due	5,414	2,590
Current	909,527	910,462
Total financing receivables	914,941	913,052
Recorded Investment greater than 90 days and accruing	0	0
Home equity line of credit | 30-59 days past due
Credit risk profile based on payment activity for loans
Total past due	1,943	425
Home equity line of credit | 60-89 days past due
Credit risk profile based on payment activity for loans
Total past due	1,350	114
Home equity line of credit | Greater than 90 days
Credit risk profile based on payment activity for loans
Total past due	2,121	2,051
Residential land
Credit risk profile based on payment activity for loans
Total past due	640	648
Current	15,929	15,149
Total financing receivables	16,569	15,797
Recorded Investment greater than 90 days and accruing	0	0
Residential land | 30-59 days past due
Credit risk profile based on payment activity for loans
Total past due	0	23
Residential land | 60-89 days past due
Credit risk profile based on payment activity for loans
Total past due	0	0
Residential land | Greater than 90 days
Credit risk profile based on payment activity for loans
Total past due	640	625
Commercial construction
Credit risk profile based on payment activity for loans
Total past due	0	0
Current	114,535	108,273
Total financing receivables	114,535	108,273
Recorded Investment greater than 90 days and accruing	0	0
Commercial construction | 30-59 days past due
Credit risk profile based on payment activity for loans
Total past due	0	0
Commercial construction | 60-89 days past due
Credit risk profile based on payment activity for loans
Total past due	0	0
Commercial construction | Greater than 90 days
Credit risk profile based on payment activity for loans
Total past due	0	0
Residential construction
Credit risk profile based on payment activity for loans
Total past due	0	0
Current	15,363	14,910
Total financing receivables	15,363	14,910
Recorded Investment greater than 90 days and accruing	0	0
Residential construction | 30-59 days past due
Credit risk profile based on payment activity for loans
Total past due	0	0
Residential construction | 60-89 days past due
Credit risk profile based on payment activity for loans
Total past due	0	0
Residential construction | Greater than 90 days
Credit risk profile based on payment activity for loans
Total past due	0	0
Commercial loans
Credit risk profile based on payment activity for loans
Total past due	1,265	4,580
Current	567,106	540,248
Total financing receivables	568,371	544,828
Recorded Investment greater than 90 days and accruing	0	0
Commercial loans | 30-59 days past due
Credit risk profile based on payment activity for loans
Total past due	344	1,825
Commercial loans | 60-89 days past due
Credit risk profile based on payment activity for loans
Total past due	689	2,025
Commercial loans | Greater than 90 days
Credit risk profile based on payment activity for loans
Total past due	232	730
Consumer loans
Credit risk profile based on payment activity for loans
Total past due	6,268	7,467
Current	223,990	216,097
Total financing receivables	230,258	223,564
Recorded Investment greater than 90 days and accruing	0	0
Consumer loans | 30-59 days past due
Credit risk profile based on payment activity for loans
Total past due	2,889	3,432
Consumer loans | 60-89 days past due
Credit risk profile based on payment activity for loans
Total past due	1,523	2,159
Consumer loans | Greater than 90 days
Credit risk profile based on payment activity for loans
Total past due	$ 1,856	$ 1,876

Bank segment - Credit risk p55

Bank segment - Credit risk profile - summary (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Credit risk profile based on nonaccrual loans
Nonaccrual loans	$ 25,143	$ 23,591
Accruing loans 90 days or more past due	0	0
Total troubled debt restructuring loans not included above	22,627	20,814
Residential 1-4 family
Credit risk profile based on nonaccrual loans
Nonaccrual loans	13,578	12,598
Accruing loans 90 days or more past due	0	0
Total troubled debt restructuring loans not included above	10,874	10,982
Commercial real estate
Credit risk profile based on nonaccrual loans
Nonaccrual loans	0	0
Accruing loans 90 days or more past due	0	0
Total troubled debt restructuring loans not included above	1,004	1,016
Home equity line of credit
Credit risk profile based on nonaccrual loans
Nonaccrual loans	5,049	4,466
Accruing loans 90 days or more past due	0	0
Total troubled debt restructuring loans not included above	8,467	6,584
Residential land
Credit risk profile based on nonaccrual loans
Nonaccrual loans	853	841
Accruing loans 90 days or more past due	0	0
Total troubled debt restructuring loans not included above	331	425
Commercial construction
Credit risk profile based on nonaccrual loans
Nonaccrual loans	0	0
Accruing loans 90 days or more past due	0	0
Total troubled debt restructuring loans not included above	0	0
Residential construction
Credit risk profile based on nonaccrual loans
Nonaccrual loans	0	0
Accruing loans 90 days or more past due	0	0
Total troubled debt restructuring loans not included above	0	0
Commercial loans
Credit risk profile based on nonaccrual loans
Nonaccrual loans	2,714	3,069
Accruing loans 90 days or more past due	0	0
Total troubled debt restructuring loans not included above	1,886	1,741
Consumer loans
Credit risk profile based on nonaccrual loans
Nonaccrual loans	2,949	2,617
Accruing loans 90 days or more past due	0	0
Total troubled debt restructuring loans not included above	$ 65	$ 66

Bank segment - Principal balan

Bank segment - Principal balance of impaired loans (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Recorded investment:
With no related allowance recorded	$ 13,999		$ 14,072
With an allowance recorded	20,632		19,321
Recorded investment	34,631		33,393
Unpaid principal balance:
With no related allowance recorded	16,034		16,041
With an allowance recorded	20,879		19,574
Unpaid principal balance	36,913		35,615
Related Allowance	2,706		2,730
Average recorded investment:
With no related allowance recorded	13,728	$ 17,643
With an allowance recorded	19,970	25,284
Average recorded investment	33,698	42,927
Interest income recognized:
With no related allowance recorded	127	130
With an allowance recorded	224	620
Interest income recognized	351	750
Residential 1-4 family
Recorded investment:
With no related allowance recorded	8,673		9,097
With an allowance recorded	9,055		9,187
Recorded investment	17,728		18,284
Unpaid principal balance:
With no related allowance recorded	9,205		9,644
With an allowance recorded	9,258		9,390
Unpaid principal balance	18,463		19,034
Related Allowance	1,207		1,248
Average recorded investment:
With no related allowance recorded	8,496	9,555
With an allowance recorded	9,129	10,048
Average recorded investment	17,625	19,603
Interest income recognized:
With no related allowance recorded	107	84
With an allowance recorded	93	119
Interest income recognized	200	203
Commercial real estate
Recorded investment:
With no related allowance recorded	0		0
With an allowance recorded	1,004		1,016
Recorded investment	1,004		1,016
Unpaid principal balance:
With no related allowance recorded	0		0
With an allowance recorded	1,004		1,016
Unpaid principal balance	1,004		1,016
Related Allowance	68		65
Average recorded investment:
With no related allowance recorded	0	220
With an allowance recorded	1,008	1,300
Average recorded investment	1,008	1,520
Interest income recognized:
With no related allowance recorded	0	0
With an allowance recorded	11	14
Interest income recognized	11	14
Home equity line of credit
Recorded investment:
With no related allowance recorded	1,690		1,496
With an allowance recorded	8,575		6,692
Recorded investment	10,265		8,188
Unpaid principal balance:
With no related allowance recorded	1,982		1,789
With an allowance recorded	8,619		6,736
Unpaid principal balance	10,601		8,525
Related Allowance	892		647
Average recorded investment:
With no related allowance recorded	1,700	2,004
With an allowance recorded	7,741	4,562
Average recorded investment	9,441	6,566
Interest income recognized:
With no related allowance recorded	5	14
With an allowance recorded	81	49
Interest income recognized	86	63
Residential land
Recorded investment:
With no related allowance recorded	1,130		1,143
With an allowance recorded	54		122
Recorded investment	1,184		1,265
Unpaid principal balance:
With no related allowance recorded	1,429		1,434
With an allowance recorded	54		122
Unpaid principal balance	1,483		1,556
Related Allowance	17		47
Average recorded investment:
With no related allowance recorded	1,168	957
With an allowance recorded	77	2,076
Average recorded investment	1,245	3,033
Interest income recognized:
With no related allowance recorded	5	26
With an allowance recorded	2	37
Interest income recognized	7	63
Commercial construction
Recorded investment:
With no related allowance recorded	0		0
With an allowance recorded	0		0
Recorded investment	0		0
Unpaid principal balance:
With no related allowance recorded	0		0
With an allowance recorded	0		0
Unpaid principal balance	0		0
Related Allowance	0		0
Average recorded investment:
With no related allowance recorded	0	0
With an allowance recorded	0	0
Average recorded investment	0	0
Interest income recognized:
With no related allowance recorded	0	0
With an allowance recorded	0	0
Interest income recognized	0	0
Residential construction
Recorded investment:
With no related allowance recorded	0		0
With an allowance recorded	0		0
Recorded investment	0		0
Unpaid principal balance:
With no related allowance recorded	0		0
With an allowance recorded	0		0
Unpaid principal balance	0		0
Related Allowance	0		0
Average recorded investment:
With no related allowance recorded	0	0
With an allowance recorded	0	0
Average recorded investment	0	0
Interest income recognized:
With no related allowance recorded	0	0
With an allowance recorded	0	0
Interest income recognized	0	0
Commercial loans
Recorded investment:
With no related allowance recorded	2,499		2,328
With an allowance recorded	1,886		2,246
Recorded investment	4,385		4,574
Unpaid principal balance:
With no related allowance recorded	3,411		3,166
With an allowance recorded	1,886		2,252
Unpaid principal balance	5,297		5,418
Related Allowance	519		694
Average recorded investment:
With no related allowance recorded	2,357	4,907
With an allowance recorded	1,957	7,268
Average recorded investment	4,314	12,175
Interest income recognized:
With no related allowance recorded	10	6
With an allowance recorded	36	401
Interest income recognized	46	407
Consumer loans
Recorded investment:
With no related allowance recorded	7		8
With an allowance recorded	58		58
Recorded investment	65		66
Unpaid principal balance:
With no related allowance recorded	7		8
With an allowance recorded	58		58
Unpaid principal balance	65		66
Related Allowance	3		$ 29
Average recorded investment:
With no related allowance recorded	7	0
With an allowance recorded	58	30
Average recorded investment	65	30
Interest income recognized:
With no related allowance recorded	0	0
With an allowance recorded	1	0
Interest income recognized	$ 1	$ 0

Bank segment - Troubled debt r

Bank segment - Troubled debt restructuring - narrative (Details) - USD ($)	3 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Troubled debt restructurings real estate loans
Troubled debt restructurings
Financing receivable modifications minimum, period of payment default of loans determined to be TDRs (in days)	90 days
Commitments to lend additional funds to borrows with impaired or modified loans	$ 0	$ 0
Consumer mortgage loans collateralized by residential real estate property in foreclosure process	$ 4,000,000	$ 4,300,000
Land loans
Troubled debt restructurings
Period of interest-only monthly payment term loan (in years)	3 years
Land loans | Maximum
Troubled debt restructurings
Extension of maturity date (in years)	5 years

Bank segment - Loan modificati

Bank segment - Loan modifications (Details) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2018USD ($)contract	Mar. 31, 2017USD ($)contract	Dec. 31, 2017USD ($)
Financing Receivable, Modifications [Line Items]
Post-modification outstanding recorded investment	$ 22,627		$ 20,814
Residential 1-4 family
Financing Receivable, Modifications [Line Items]
Post-modification outstanding recorded investment	10,874		10,982
Commercial real estate
Financing Receivable, Modifications [Line Items]
Post-modification outstanding recorded investment	1,004		1,016
Home equity line of credit
Financing Receivable, Modifications [Line Items]
Post-modification outstanding recorded investment	8,467		6,584
Residential land
Financing Receivable, Modifications [Line Items]
Post-modification outstanding recorded investment	331		425
Commercial construction
Financing Receivable, Modifications [Line Items]
Post-modification outstanding recorded investment	0		0
Residential construction
Financing Receivable, Modifications [Line Items]
Post-modification outstanding recorded investment	0		0
Commercial loans
Financing Receivable, Modifications [Line Items]
Post-modification outstanding recorded investment	1,886		1,741
Consumer loans
Financing Receivable, Modifications [Line Items]
Post-modification outstanding recorded investment	$ 65		$ 66
Troubled debt restructurings real estate loans
Financing Receivable, Modifications [Line Items]
Number of contracts | contract	25	13
Pre-modification outstanding recorded investment	$ 4,869	$ 1,139
Post-modification outstanding recorded investment	4,878	1,133
Net increase in allowance	$ 404	$ 106
Troubled debt restructurings real estate loans | Residential 1-4 family
Financing Receivable, Modifications [Line Items]
Number of contracts | contract	1	3
Pre-modification outstanding recorded investment	$ 339	$ 512
Post-modification outstanding recorded investment	344	520
Net increase in allowance	$ 16	$ 45
Troubled debt restructurings real estate loans | Commercial real estate
Financing Receivable, Modifications [Line Items]
Number of contracts | contract	0	0
Pre-modification outstanding recorded investment	$ 0	$ 0
Post-modification outstanding recorded investment	0	0
Net increase in allowance	$ 0	$ 0
Troubled debt restructurings real estate loans | Home equity line of credit
Financing Receivable, Modifications [Line Items]
Number of contracts | contract	18	8
Pre-modification outstanding recorded investment	$ 2,170	$ 226
Post-modification outstanding recorded investment	2,174	212
Net increase in allowance	$ 388	$ 34
Troubled debt restructurings real estate loans | Residential land
Financing Receivable, Modifications [Line Items]
Number of contracts | contract	1	0
Pre-modification outstanding recorded investment	$ 109	$ 0
Post-modification outstanding recorded investment	109	0
Net increase in allowance	$ 0	$ 0
Troubled debt restructurings real estate loans | Commercial construction
Financing Receivable, Modifications [Line Items]
Number of contracts | contract	0	0
Pre-modification outstanding recorded investment	$ 0	$ 0
Post-modification outstanding recorded investment	0	0
Net increase in allowance	$ 0	$ 0
Troubled debt restructurings real estate loans | Residential construction
Financing Receivable, Modifications [Line Items]
Number of contracts | contract	0	0
Pre-modification outstanding recorded investment	$ 0	$ 0
Post-modification outstanding recorded investment	0	0
Net increase in allowance	$ 0	$ 0
Troubled debt restructurings real estate loans | Commercial loans
Financing Receivable, Modifications [Line Items]
Number of contracts | contract	5	1
Pre-modification outstanding recorded investment	$ 2,251	$ 342
Post-modification outstanding recorded investment	2,251	342
Net increase in allowance	$ 0	$ 0
Troubled debt restructurings real estate loans | Consumer loans
Financing Receivable, Modifications [Line Items]
Number of contracts | contract	0	1
Pre-modification outstanding recorded investment	$ 0	$ 59
Post-modification outstanding recorded investment	0	59
Net increase in allowance	$ 0	$ 27

Bank segment - Troubled debt59

Bank segment - Troubled debt restructuring that subsequently defaulted (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018USD ($)contract	Mar. 31, 2017USD ($)contract
Financing Receivable, Modifications [Line Items]
Number of contracts | contract	2	1
Recorded investment | $	$ 135	$ 301
Residential 1-4 family
Financing Receivable, Modifications [Line Items]
Number of contracts | contract	1	1
Recorded investment | $	$ 49	$ 301
Commercial real estate
Financing Receivable, Modifications [Line Items]
Number of contracts | contract	0	0
Recorded investment | $	$ 0	$ 0
Home equity line of credit
Financing Receivable, Modifications [Line Items]
Number of contracts | contract	1	0
Recorded investment | $	$ 86	$ 0
Residential land
Financing Receivable, Modifications [Line Items]
Number of contracts | contract	0	0
Recorded investment | $	$ 0	$ 0
Commercial construction
Financing Receivable, Modifications [Line Items]
Number of contracts | contract	0	0
Recorded investment | $	$ 0	$ 0
Residential construction
Financing Receivable, Modifications [Line Items]
Number of contracts | contract	0	0
Recorded investment | $	$ 0	$ 0
Commercial loans
Financing Receivable, Modifications [Line Items]
Number of contracts | contract	0	0
Recorded investment | $	$ 0	$ 0
Consumer loans
Financing Receivable, Modifications [Line Items]
Number of contracts | contract	0	0
Recorded investment | $	$ 0	$ 0

Bank segment - Mortgage servic

Bank segment - Mortgage servicing rights (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017
Valuation Allowance [Roll Forward]
Weighted average discount rate	3.262%
American Savings Bank (ASB)
Servicing Asset at Amortized Cost [Line Items]
Repurchase reserve				$ 100		$ 100
Mortgage service fees	$ 700	$ 800
Movement in Mortgage Loans on Real Estate [Roll Forward]
Servicing asset - beginning balance	8,639
Servicing asset - ending balance	8,541		$ 8,639
American Savings Bank (ASB) | Mortgage Servicing Rights (MSR)
Servicing Asset at Amortized Cost [Line Items]
Gross carrying amount				17,846	$ 17,511
Accumulated amortization				(9,305)	(8,872)
Valuation allowance	0	0	0	0	0	0
Net carrying amount				8,541	8,639	$ 9,294
Movement in Mortgage Loans on Real Estate [Roll Forward]
Servicing asset - beginning balance	8,639	9,373	9,373
Amount capitalized	335	436
Amortization	(433)	(515)
Other-than-temporary impairment	0	0
Servicing asset - ending balance	8,541	9,294	8,639
Valuation Allowance [Roll Forward]
Valuation allowance, beginning balance	0	0	0
Provision (recovery)	0	0
Other-than-temporary impairment	0	0
Valuation allowance, ending balance	$ 0	0	$ 0
Unpaid principal balance				1,184,160	1,195,454
Weighted average note-rate	3.94%		3.94%
Weighted average discount rate	10.00%		10.00%
Weighted average prepayment speed	7.10%		9.00%
Prepayment rate:
25 basis points adverse rate change				(378)	(869)
50 basis points adverse rate change				(883)	(1,828)
Discount rate:
25 basis points adverse rate change				(127)	(111)
50 basis points adverse rate change				$ (252)	$ (220)
American Savings Bank (ASB) | Measurement Band A
Valuation Allowance [Roll Forward]
Measurement band percent for risk categorization	0.50%
American Savings Bank (ASB) | Measurement Band B
Valuation Allowance [Roll Forward]
Measurement band percent for risk categorization	1.00%
American Savings Bank (ASB) | Residential loan
Servicing Asset at Amortized Cost [Line Items]
Proceeds from sale of mortgage loans	$ 33,100	40,600
Gain on sale of mortgage loans	$ 600	$ 800

Bank segment - Repurchase Agre

Bank segment - Repurchase Agreements (Details) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Offsetting Liabilities [Line Items]
Gross amount of recognized liabilities	$ 50	$ 141
Gross amount offset in the Balance Sheet	0	0
Securities sold under agreements to repurchase	50	141
Securities sold under agreements to repurchase collateral, financial instruments	97	165
Securities sold under agreements to repurchase, cash collateral pledged	0	0
Commercial account holders
Offsetting Liabilities [Line Items]
Securities sold under agreements to repurchase	50	141
Securities sold under agreements to repurchase collateral, financial instruments	97	165
Securities sold under agreements to repurchase, cash collateral pledged	$ 0	$ 0

Bank segment - Derivatives (De

Bank segment - Derivatives (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Not designated as a hedging instrument
Derivative instrument
Asset derivatives	$ 282		$ 137
Liability derivatives	87		30
Net gains (losses) recognized in the Statement of Income	88	$ (31)
Interest rate lock commitments
Derivative instrument
Notional amount	24,741		13,669
Fair value	255		131
Interest rate lock commitments | Not designated as a hedging instrument
Derivative instrument
Asset derivatives	264		133
Liability derivatives	9		2
Interest rate lock commitments | Not designated as a hedging instrument | Mortgage banking income
Derivative instrument
Net gains (losses) recognized in the Statement of Income	124	(104)
Forward commitments
Derivative instrument
Notional amount	26,844		14,465
Fair value	(60)		(24)
Forward commitments | Not designated as a hedging instrument
Derivative instrument
Asset derivatives	18		4
Liability derivatives	78		$ 28
Forward commitments | Not designated as a hedging instrument | Mortgage banking income
Derivative instrument
Net gains (losses) recognized in the Statement of Income	$ (36)	$ 73

Bank segment - Contingencies (

Bank segment - Contingencies (Details) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
American Savings Bank (ASB)
Loss Contingencies [Line Items]
Unfunded commitments to fund the company's LIHTC	$ 14.4	$ 15.8

Credit agreements (Details)

Credit agreements (Details)	Mar. 31, 2018USD ($)Institution	Dec. 31, 2017USD ($)
Debt Disclosure [Abstract]
Number of financial institutions | Institution	8
Line of credit facility
Credit agreement
Revolving noncollateralized credit facility with a letter of credit sub-facility	$ 150,000,000
Amount outstanding under facilities	0	$ 0
Line of credit facility | Hawaiian Electric Company
Credit agreement
Revolving noncollateralized credit facility with a letter of credit sub-facility	200,000,000
Amount outstanding under facilities	$ 0	$ 0

Shareholders' equity - Accumula

Shareholders' equity - Accumulated other comprehensive income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]
Beginning Balance	$ 2,097,386	$ 2,066,753
Current period other comprehensive income (loss)	(12,773)	985
Ending Balance	2,091,777	2,065,588
AOCI
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]
Beginning Balance	(41,941)	(33,129)
Current period other comprehensive income (loss)	(12,773)	985
Ending Balance	(54,714)	(32,144)
Net unrealized gains (losses) on securities
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]
Beginning Balance	(14,951)	(7,931)
Current period other comprehensive income (loss)	(13,297)	223
Ending Balance	(28,248)	(7,708)
Unrealized gains (losses) on derivatives
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]
Beginning Balance	0	(454)
Current period other comprehensive income (loss)	0	454
Ending Balance	0	0
Retirement benefit plans
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]
Beginning Balance	(26,990)	(24,744)
Current period other comprehensive income (loss)	524	308
Ending Balance	(26,466)	(24,436)
Hawaiian Electric Company, Inc. and Subsidiaries
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]
Beginning Balance	1,845,283	1,799,787
Current period other comprehensive income (loss)	31	459
Ending Balance	1,846,955	1,799,769
Hawaiian Electric Company, Inc. and Subsidiaries | AOCI
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]
Beginning Balance	(1,219)	(322)
Current period other comprehensive income (loss)	31	459
Ending Balance	(1,188)	137
Hawaiian Electric Company, Inc. and Subsidiaries | Unrealized gains (losses) on derivatives
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]
Beginning Balance	0	(454)
Current period other comprehensive income (loss)	0	454
Ending Balance	0	0
Hawaiian Electric Company, Inc. and Subsidiaries | Retirement benefit plans
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]
Beginning Balance	(1,219)	132
Current period other comprehensive income (loss)	31	5
Ending Balance	$ (1,188)	$ 137

Shareholders' equity - Reclassi

Shareholders' equity - Reclassification out of AOCI (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Reclassifications out of accumulated other comprehensive income/(loss)
Total reclassifications	$ 524	$ 762
Hawaiian Electric Company, Inc. and Subsidiaries
Reclassifications out of accumulated other comprehensive income/(loss)
Total reclassifications	31	459
Amortization of prior service credit and net losses recognized during the period in net periodic benefit cost
Reclassifications out of accumulated other comprehensive income/(loss)
Total reclassifications	5,146	3,921
Amortization of prior service credit and net losses recognized during the period in net periodic benefit cost | Hawaiian Electric Company, Inc. and Subsidiaries
Reclassifications out of accumulated other comprehensive income/(loss)
Total reclassifications	4,653	3,618
Impact of D&Os of the PUC included in regulatory assets
Reclassifications out of accumulated other comprehensive income/(loss)
Total reclassifications	(4,622)	(3,613)
Impact of D&Os of the PUC included in regulatory assets | Hawaiian Electric Company, Inc. and Subsidiaries
Reclassifications out of accumulated other comprehensive income/(loss)
Total reclassifications	(4,622)	(3,613)
Reclassification out of Accumulated Other Comprehensive Income | Unrealized gains (losses) on derivatives | Forward commitments | Hawaiian Electric Company, Inc. and Subsidiaries
Reclassifications out of accumulated other comprehensive income/(loss)
Total reclassifications	0	454
Reclassification out of Accumulated Other Comprehensive Income | Unrealized gains (losses) on derivatives | Electric utility | Forward commitments
Reclassifications out of accumulated other comprehensive income/(loss)
Total reclassifications	$ 0	$ 454

Revenues (Details)

Revenues (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenue from Contract with Customer [Abstract]
General payment period	30 days
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	$ 575,465
Other revenues	70,409
Total revenues	645,874	$ 591,562
Services/goods transferred at a point in time
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	12,294
Services/goods transferred over time
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	563,171
Electric energy sales - residential
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	178,589
Electric energy sales - commercial
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	188,998
Electric energy sales - large light and power
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	192,321
Electric energy sales - other
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	3,263
Utility fees
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	797
Bank fees
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	11,497
Regulatory revenue
Disaggregation of Revenue [Line Items]
Other revenues	4,750
Bank interest and dividend income
Disaggregation of Revenue [Line Items]
Other revenues	62,002
Other bank noninterest income
Disaggregation of Revenue [Line Items]
Other revenues	1,920
Other
Disaggregation of Revenue [Line Items]
Other revenues	1,737
Electric utility
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	563,968
Other revenues	6,459
Total revenues	570,427	518,611
Electric utility | Services/goods transferred at a point in time
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	797
Electric utility | Services/goods transferred over time
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	563,171
Electric utility | Electric energy sales - residential
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	178,589
Electric utility | Electric energy sales - commercial
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	188,998
Electric utility | Electric energy sales - large light and power
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	192,321
Electric utility | Electric energy sales - other
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	3,263
Electric utility | Utility fees
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	797
Electric utility | Bank fees
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	0
Electric utility | Regulatory revenue
Disaggregation of Revenue [Line Items]
Other revenues	4,750
Electric utility | Bank interest and dividend income
Disaggregation of Revenue [Line Items]
Other revenues	0
Electric utility | Other bank noninterest income
Disaggregation of Revenue [Line Items]
Other revenues	0
Electric utility | Other
Disaggregation of Revenue [Line Items]
Other revenues	1,709
Bank
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	11,497
Other revenues	63,922
Total revenues	75,419	72,856
Bank | Services/goods transferred at a point in time
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	11,497
Bank | Services/goods transferred over time
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	0
Bank | Electric energy sales - residential
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	0
Bank | Electric energy sales - commercial
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	0
Bank | Electric energy sales - large light and power
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	0
Bank | Electric energy sales - other
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	0
Bank | Utility fees
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	0
Bank | Bank fees
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	11,497
Bank | Regulatory revenue
Disaggregation of Revenue [Line Items]
Other revenues	0
Bank | Bank interest and dividend income
Disaggregation of Revenue [Line Items]
Other revenues	62,002
Bank | Other bank noninterest income
Disaggregation of Revenue [Line Items]
Other revenues	1,920
Bank | Other
Disaggregation of Revenue [Line Items]
Other revenues	0
Other
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	0
Other revenues	28
Total revenues	28	$ 95
Other | Services/goods transferred at a point in time
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	0
Other | Services/goods transferred over time
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	0
Other | Electric energy sales - residential
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	0
Other | Electric energy sales - commercial
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	0
Other | Electric energy sales - large light and power
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	0
Other | Electric energy sales - other
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	0
Other | Utility fees
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	0
Other | Bank fees
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	0
Other | Regulatory revenue
Disaggregation of Revenue [Line Items]
Other revenues	0
Other | Bank interest and dividend income
Disaggregation of Revenue [Line Items]
Other revenues	0
Other | Other bank noninterest income
Disaggregation of Revenue [Line Items]
Other revenues	0
Other | Other
Disaggregation of Revenue [Line Items]
Other revenues	$ 28

Retirement benefits (Details)

Retirement benefits (Details) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Defined benefit plans
Expected payments for remainder of fiscal year	$ 3,000,000		$ 1,000,000
Retirement benefits expense	$ 12,000,000	$ 9,000,000
Number of years for which regulatory asset/liability for each utility will be amortized, beginning with respective utility's next rate case (in years)	5 years
Defined contribution plan, expenses recognized	$ 1,600,000	1,500,000
Cash contributions by the employer to defined contribution plan	3,700,000	2,900,000
Hawaiian Electric Company, Inc. and Subsidiaries
Defined benefit plans
Expected payments for remainder of fiscal year	1,000,000		500,000
Retirement benefits expense	11,000,000	8,000,000
Defined contribution plan, expenses recognized	500,000	500,000
Cash contributions by the employer to defined contribution plan	500,000	500,000
Pension benefits
Defined benefit plans
Contributions made to defined benefit plans	16,000,000	17,000,000
Contributions expected to be paid in current year	62,000,000		67,000,000
Service cost	17,113,000	16,494,000
Interest cost	19,234,000	20,216,000
Expected return on plan assets	(27,254,000)	(25,721,000)
Amortization of net prior service gain	(10,000)	(14,000)
Amortization of net actuarial loss (gain)	7,395,000	6,513,000
Net periodic pension/benefit cost (return)	16,478,000	17,488,000
Impact of PUC D&Os	2,657,000	(5,156,000)
Net periodic pension/benefit cost (adjusted for impact of PUC D&Os)	19,135,000	12,332,000
Pension benefits | American Savings Bank (ASB)
Defined benefit plans
Contributions expected to be paid in current year	0		0
Pension benefits | Hawaiian Electric Company, Inc. and Subsidiaries
Defined benefit plans
Contributions made to defined benefit plans	15,000,000	17,000,000
Contributions expected to be paid in current year	61,000,000		66,000,000
Service cost	16,673,000	16,094,000
Interest cost	17,710,000	18,589,000
Expected return on plan assets	(25,607,000)	(24,011,000)
Amortization of net prior service gain	2,000	2,000
Amortization of net actuarial loss (gain)	6,710,000	6,006,000
Net periodic pension/benefit cost (return)	15,488,000	16,680,000
Impact of PUC D&Os	2,657,000	(5,156,000)
Net periodic pension/benefit cost (adjusted for impact of PUC D&Os)	18,145,000	11,524,000
Pension benefits | Hawaiian Electric Industries, Inc.
Defined benefit plans
Contributions expected to be paid in current year	1,000,000		$ 1,000,000
Other benefits
Defined benefit plans
Service cost	669,000	840,000
Interest cost	1,931,000	2,411,000
Expected return on plan assets	(3,192,000)	(3,066,000)
Amortization of net prior service gain	(452,000)	(449,000)
Amortization of net actuarial loss (gain)	(2,000)	366,000
Net periodic pension/benefit cost (return)	(1,046,000)	102,000
Impact of PUC D&Os	1,071,000	146,000
Net periodic pension/benefit cost (adjusted for impact of PUC D&Os)	25,000	248,000
Other benefits | Hawaiian Electric Company, Inc. and Subsidiaries
Defined benefit plans
Service cost	664,000	835,000
Interest cost	1,859,000	2,327,000
Expected return on plan assets	(3,140,000)	(3,017,000)
Amortization of net prior service gain	(451,000)	(451,000)
Amortization of net actuarial loss (gain)	0	359,000
Net periodic pension/benefit cost (return)	(1,068,000)	53,000
Impact of PUC D&Os	1,071,000	146,000
Net periodic pension/benefit cost (adjusted for impact of PUC D&Os)	$ 3,000	$ 199,000

Share-based compensation - Narr

Share-based compensation - Narrative (Details) - USD ($) $ in Millions	Mar. 01, 2014	Mar. 31, 2018	Mar. 31, 2017
Share-based compensation
Income tax benefit from compensation expense		$ 0.2	$ 0.3
Restricted stock units
Share-based compensation
Fair value of vested stock		2.7	3.1
Income tax benefit from compensation expense		0.5	1.1
Unrecognized share based compensation		$ 6.1
Weighted average period for recognition of unrecognized compensation cost (in years)		3 years
Long-term Incentive Plan
Share-based compensation
Payment award, low end of range		0.00%
Payment award, high end of range		200.00%
Award performance period (in years)		3 years
LTIP linked to TRS
Share-based compensation
Fair value of vested stock			1.9
Unrecognized share based compensation		$ 2
Weighted average period for recognition of unrecognized compensation cost (in years)		2 years 3 months 18 days
Measurement period for total return to shareholders (in years)		3 years
Tax benefits related to awards vested			0.7
LTIP awards linked to other performance conditions
Share-based compensation
Fair value of vested stock			4.2
Income tax benefit from compensation expense			$ 1.6
Unrecognized share based compensation		$ 6.9
Weighted average period for recognition of unrecognized compensation cost (in years)		2 years 3 months 18 days
Equity and Incentive Plan
Share-based compensation
Number of additional shares authorized (in shares)	1,500,000
Shares available for future issuance (in shares)		3,200,000
Number of share issuable upon vesting and achievement of performance goals (in shares)		600,000
Nonemployee Director Stock Plan
Share-based compensation
Shares available for future grant (in shares)		84,354

Share-based compensation - Summ

Share-based compensation - Summary of income taxes (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Share-based compensation
Share-based compensation expense	$ 1.7	$ 1.1
Income tax benefit	0.2	0.3
Hawaiian Electric Company, Inc. and Subsidiaries
Share-based compensation
Share-based compensation expense	0.6	0.5
Income tax benefit	$ 0.1	$ 0.2

Share-based compensation - 2011

Share-based compensation - 2011 Director Plan (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Share-based compensation
Income tax benefit from compensation expense	$ 200	$ 300
Common stock
Share-based compensation
Shares granted (in shares)	1,074	770
Fair value measurement of shares granted and vested	$ 39	$ 25
Income tax benefit from compensation expense	$ 10	$ 10

Share-based compensation - Su72

Share-based compensation - Summary of changes in share based compensation (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Restricted stock units
Restricted stock awards and restricted stock units
Outstanding, beginning of period (in shares)	197,047	220,683
Granted (in shares)	88,905	96,977
Vested (in shares)	(75,235)	(81,624)
Forfeited (in shares)	(2,629)	0
Outstanding, end of period (in shares)	208,088	236,036
Weighted-average grant-date fair value per share
Outstanding, beginning of period (in dollars per share)	$ 31.53	$ 29.57
Granted (in dollars per share)	34.10	33.48
Vested (in dollars per share)	30.55	28.85
Forfeited (in dollars per share)	33.09	0
Outstanding, end of period (in dollars per share)	$ 32.97	$ 31.42
Total weighted-average grant-date fair value	$ 3	$ 3.2
LTIP linked to TRS
Restricted stock awards and restricted stock units
Outstanding, beginning of period (in shares)	32,904	83,106
Granted (in shares)	35,626	36,971
Vested (in shares)	0	(83,106)
Forfeited (in shares)	(1,739)	0
Outstanding, end of period (in shares)	66,791	36,971
Weighted-average grant-date fair value per share
Outstanding, beginning of period (in dollars per share)	$ 39.51	$ 22.95
Granted (in dollars per share)	38.21	39.51
Vested (in dollars per share)	0	22.95
Forfeited (in dollars per share)	38.83	0
Outstanding, end of period (in dollars per share)	$ 38.84	$ 39.51
Total weighted-average grant-date fair value	$ 1.4	$ 1.5
LTIP awards linked to other performance conditions
Restricted stock awards and restricted stock units
Outstanding, beginning of period (in shares)	131,616	109,816
Granted (in shares)	142,509	147,888
Vested (in shares)	0	(109,816)
Forfeited (in shares)	(6,958)	0
Outstanding, end of period (in shares)	267,167	147,888
Weighted-average grant-date fair value per share
Outstanding, beginning of period (in dollars per share)	$ 33.47	$ 25.18
Granted (in dollars per share)	34.10	33.48
Vested (in dollars per share)	0	25.18
Forfeited (in dollars per share)	33.81	0
Outstanding, end of period (in dollars per share)	$ 33.80	$ 33.48
Total weighted-average grant-date fair value	$ 4.9	$ 5

Share-based compensation - Fair

Share-based compensation - Fair value assumptions (Details) - LTIP linked to TRS - $ / shares	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Risk-free interest rate	2.29%	1.46%
Expected life (in years)	3 years	3 years
Expected volatility	17.00%	20.10%
Range of expected volatility for Peer Group, minimum (as a percent)	15.10%	15.40%
Range of expected volatility for Peer Group, maximum (as a percent)	26.20%	26.00%
Grant date fair value (in dollars per share)	$ 38.20	$ 39.51

Cash flows (Details)

Cash flows (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Supplemental disclosures of cash flow information
Interest paid to non-affiliates	$ 19	$ 19
Income taxes paid (including refundable credits)	3	4
Supplemental disclosures of noncash activities
Estimated fair value of noncash contributions in aid of construction (investing)	3	0
Unpaid invoices and accruals for capital expenditures, balance, end of period (investing)	48	27
Loans transferred from held for investment to held for sale (investing)	1	9
Common stock issued (gross) for director and executive/management compensation (financing)	3	9
Transfer of retail repurchase agreements to deposit liabilities (financing)	102	0
Hawaiian Electric Company, Inc. and Subsidiaries
Supplemental disclosures of cash flow information
Interest paid to non-affiliates	12	13
Income taxes paid (including refundable credits)	5	2
Supplemental disclosures of noncash activities
Estimated fair value of noncash contributions in aid of construction (investing)	3	0
Unpaid invoices and accruals for capital expenditures, balance, end of period (investing)	$ 29	$ 26

Fair value measurements - Summa

Fair value measurements - Summary of financial assets and liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Financial assets
Available-for-sale investment securities	$ 1,418,490	$ 1,401,198
Held-to-maturity investment securities	42,491	44,412
Financial liabilities
Short-term borrowings—other than bank	238,445	117,945
Other bank borrowings	100,430	190,859
Carrying or notional amount
Financial assets
Available-for-sale investment securities	1,418,490	1,401,198
Held-to-maturity investment securities	43,450	44,515
Stock in Federal Home Loan Bank	10,158	9,706
Loans, net	4,695,508	4,628,381
Mortgage-servicing rights	8,541	8,639
Derivative assets	29,840	17,812
Financial liabilities
Deposit liabilities	777,390	5,890,597
Short-term borrowings—other than bank	238,445	117,945
Other bank borrowings	100,430	190,859
Long-term debt, net	1,684,002	1,683,797
Derivative liabilities	24,985	13,562
Carrying or notional amount | Hawaiian Electric Company, Inc. and Subsidiaries
Financial assets
Derivative assets	3,240	3,240
Financial liabilities
Long-term debt, net	1,368,627	1,368,479
Short-term borrowings	121,983	4,999
Estimated fair value
Financial assets
Available-for-sale investment securities	1,418,490	1,401,198
Held-to-maturity investment securities	42,491	44,412
Stock in Federal Home Loan Bank	10,158	9,706
Loans, net	4,780,250	4,781,751
Mortgage-servicing rights	12,882	12,052
Derivative assets	611	393
Financial liabilities
Deposit liabilities	766,425	5,884,071
Short-term borrowings—other than bank	238,445	117,945
Other bank borrowings	100,377	190,829
Long-term debt, net	1,741,324	1,813,295
Derivative liabilities	87	30
Estimated fair value | Hawaiian Electric Company, Inc. and Subsidiaries
Financial assets
Derivative assets	329	256
Financial liabilities
Long-term debt, net	1,432,134	1,497,079
Short-term borrowings	121,983	4,999
Estimated fair value | Level 1
Financial assets
Available-for-sale investment securities	0	0
Held-to-maturity investment securities	0	0
Stock in Federal Home Loan Bank	0	0
Loans, net	0	0
Mortgage-servicing rights	0	0
Derivative assets	0	0
Financial liabilities
Deposit liabilities	0	0
Short-term borrowings—other than bank	0	0
Other bank borrowings	0	0
Long-term debt, net	0	0
Derivative liabilities	60	20
Estimated fair value | Level 1 | Hawaiian Electric Company, Inc. and Subsidiaries
Financial assets
Derivative assets	0	0
Financial liabilities
Long-term debt, net	0	0
Short-term borrowings	0	0
Estimated fair value | Level 2
Financial assets
Available-for-sale investment securities	1,403,063	1,385,771
Held-to-maturity investment securities	42,491	44,412
Stock in Federal Home Loan Bank	10,158	9,706
Loans, net	7,380	11,254
Mortgage-servicing rights	0	0
Derivative assets	611	393
Financial liabilities
Deposit liabilities	766,425	5,884,071
Short-term borrowings—other than bank	238,445	117,945
Other bank borrowings	100,377	190,829
Long-term debt, net	1,741,324	1,813,295
Derivative liabilities	27	10
Estimated fair value | Level 2 | Hawaiian Electric Company, Inc. and Subsidiaries
Financial assets
Derivative assets	329	256
Financial liabilities
Long-term debt, net	1,432,134	1,497,079
Short-term borrowings	121,983	4,999
Estimated fair value | Level 3
Financial assets
Available-for-sale investment securities	15,427	15,427
Held-to-maturity investment securities	0	0
Stock in Federal Home Loan Bank	0	0
Loans, net	4,772,870	4,770,497
Mortgage-servicing rights	12,882	12,052
Derivative assets	0	0
Financial liabilities
Deposit liabilities	0	0
Short-term borrowings—other than bank	0	0
Other bank borrowings	0	0
Long-term debt, net	0	0
Derivative liabilities	0	0
Estimated fair value | Level 3 | Hawaiian Electric Company, Inc. and Subsidiaries
Financial assets
Derivative assets	0	0
Financial liabilities
Long-term debt, net	0	0
Short-term borrowings	$ 0	$ 0

Fair value measurements - Asset

Fair value measurements - Assets and liabilities measured on a recurring basis (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Derivative assets
Available-for-sale investment securities	$ 1,418,490	$ 1,401,198
Fair value measurements on a recurring basis | Level 1
Derivative assets
Derivative assets	0	0
Derivative liabilities
Derivative liabilities	60	20
Fair value measurements on a recurring basis | Level 1 | Interest rate lock commitments
Derivative assets
Derivative assets	0	0
Derivative liabilities
Derivative liabilities	0	0
Fair value measurements on a recurring basis | Level 1 | Forward commitments
Derivative assets
Derivative assets	0	0
Derivative liabilities
Derivative liabilities	60	20
Fair value measurements on a recurring basis | Level 1 | Window forward contracts
Derivative assets
Derivative assets	0	0
Fair value measurements on a recurring basis | Level 1 | Bank
Derivative assets
Available-for-sale investment securities	0	0
Fair value measurements on a recurring basis | Level 1 | Mortgage-related securities - FNMA, FHLMC and GNMA | Bank
Derivative assets
Available-for-sale investment securities	0	0
Fair value measurements on a recurring basis | Level 1 | U.S. Treasury federal agency obligations | Bank
Derivative assets
Available-for-sale investment securities	0	0
Fair value measurements on a recurring basis | Level 1 | Mortgage revenue bond | Bank
Derivative assets
Available-for-sale investment securities	0	0
Fair value measurements on a recurring basis | Level 2
Derivative assets
Derivative assets	611	393
Derivative liabilities
Derivative liabilities	27	10
Fair value measurements on a recurring basis | Level 2 | Interest rate lock commitments
Derivative assets
Derivative assets	264	133
Derivative liabilities
Derivative liabilities	9	2
Fair value measurements on a recurring basis | Level 2 | Forward commitments
Derivative assets
Derivative assets	18	4
Derivative liabilities
Derivative liabilities	18	8
Fair value measurements on a recurring basis | Level 2 | Window forward contracts
Derivative assets
Derivative assets	329	256
Fair value measurements on a recurring basis | Level 2 | Bank
Derivative assets
Available-for-sale investment securities	1,403,063	1,385,771
Fair value measurements on a recurring basis | Level 2 | Mortgage-related securities - FNMA, FHLMC and GNMA | Bank
Derivative assets
Available-for-sale investment securities	1,224,235	1,201,473
Fair value measurements on a recurring basis | Level 2 | U.S. Treasury federal agency obligations | Bank
Derivative assets
Available-for-sale investment securities	178,828	184,298
Fair value measurements on a recurring basis | Level 2 | Mortgage revenue bond | Bank
Derivative assets
Available-for-sale investment securities	0	0
Fair value measurements on a recurring basis | Level 3
Derivative assets
Derivative assets	0	0
Derivative liabilities
Derivative liabilities	0	0
Fair value measurements on a recurring basis | Level 3 | Interest rate lock commitments
Derivative assets
Derivative assets	0	0
Derivative liabilities
Derivative liabilities	0	0
Fair value measurements on a recurring basis | Level 3 | Forward commitments
Derivative assets
Derivative assets	0	0
Derivative liabilities
Derivative liabilities	0	0
Fair value measurements on a recurring basis | Level 3 | Window forward contracts
Derivative assets
Derivative assets	0	0
Fair value measurements on a recurring basis | Level 3 | Bank
Derivative assets
Available-for-sale investment securities	15,427	15,427
Fair value measurements on a recurring basis | Level 3 | Mortgage-related securities - FNMA, FHLMC and GNMA | Bank
Derivative assets
Available-for-sale investment securities	0	0
Fair value measurements on a recurring basis | Level 3 | U.S. Treasury federal agency obligations | Bank
Derivative assets
Available-for-sale investment securities	0	0
Fair value measurements on a recurring basis | Level 3 | Mortgage revenue bond | Bank
Derivative assets
Available-for-sale investment securities	$ 15,427	$ 15,427

Fair value measurements - Addit

Fair value measurements - Additional Information (Details) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Weighted average discount rate	3.262%
American Savings Bank (ASB) | Fair value measurements on a nonrecurring basis
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Adjustments to fair value of loans held for sale	$ 0	$ 0
Mortgage revenue bond
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	15,427,000	15,427,000	$ 15,427,000
Principal payments received	0	0
Purchases	0	0
Unrealized gain (loss) included in other comprehensive income	0	0
Ending balance	$ 15,427,000	$ 15,427,000	$ 15,427,000

Fair value measurements - Ass78

Fair value measurements - Assets Measured on a Nonrecurring Basis (Details) - USD ($)	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017
Carrying or notional amount
Fair value measurements on a recurring basis
Loans, net	$ 4,695,508,000	$ 4,628,381,000
Estimated fair value
Fair value measurements on a recurring basis
Loans, net	4,780,250,000	4,781,751,000
Estimated fair value | Level 1
Fair value measurements on a recurring basis
Loans, net	0	0
Estimated fair value | Level 2
Fair value measurements on a recurring basis
Loans, net	7,380,000	11,254,000
Estimated fair value | Level 3
Fair value measurements on a recurring basis
Loans, net	4,772,870,000	4,770,497,000
Fair value measurements on a nonrecurring basis | American Savings Bank (ASB)
Fair value measurements on a recurring basis
Adjustments to fair value of loans held for sale	0		$ 0
Fair value measurements on a nonrecurring basis | Level 1
Fair value measurements on a recurring basis
Loans, net	0	0
Fair value measurements on a nonrecurring basis | Level 2
Fair value measurements on a recurring basis
Loans, net	0	0
Fair value measurements on a nonrecurring basis | Level 3
Fair value measurements on a recurring basis
Loans, net	545,000	2,621,000
Fair value measurements on a nonrecurring basis | Estimated fair value
Fair value measurements on a recurring basis
Loans, net	$ 545,000	$ 2,621,000

Fair value measurements - Sum79

Fair value measurements - Summary of Level 3 financial instruments (Details) - Level 3 - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Fair value measurements
Fair value	$ 545	$ 2,621
Fair value of collateral | Residential loan
Fair value measurements
Fair value	$ 545	$ 613
Appraised value, selling cost	7.00%	7.00%
Appraised value, weighted average rate	84.00%	84.00%
Fair value of collateral | Residential loan | Minimum
Fair value measurements
Appraised value	69.00%	71.00%
Fair value of collateral | Residential loan | Maximum
Fair value measurements
Appraised value	95.00%	92.00%
Fair value of collateral | Commercial loans
Fair value measurements
Fair value		$ 2,008
Appraised value, weighted average rate		75.00%
Fair value of collateral | Commercial loans | Minimum
Fair value measurements
Appraised value		71.00%
Fair value of collateral | Commercial loans | Maximum
Fair value measurements
Appraised value		76.00%