Hawaiian Electric Company, Inc. PFD SER E 5% (HAWEL) 10-K 26 Feb 21 2020 FY Annual report Financial data

Cover Page

Cover Page - USD ($)	12 Months Ended
	Dec. 31, 2020	Feb. 12, 2021	Jun. 30, 2020
Entity Information [Line Items]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2020
Document Transition Report	false
Entity Registrant Name	Hawaiian Electric Industries, Inc.
Entity File Number	1-8503
Entity Tax Identification Number	99-0208097
Entity Central Index Key	0000354707
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Incorporation, State or Country Code	HI
Entity Address, Address Line One	1001 Bishop Street, Suite 2900
Entity Address, City or Town	Honolulu
Entity Address, State or Province	HI
Entity Address, Postal Zip Code	96813
City Area Code	808
Local Phone Number	543-5662
Title of 12(b) Security	Common Stock, Without Par Value
Trading Symbol	HE
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 3,937,071,331
Entity Common Stock, Shares Outstanding		109,181,124
Documents Incorporated by Reference	Hawaiian El ectric’s Exhibit 99.1, consisting of: Hawaiian Electric’s Directors, Executive Officers and Corporate Governance—Part III Hawaiian Electric’s Executive Compensation—Part III Hawaiian Electric’s Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters— Part III Hawaiian Electric’s Certain Relationships and Related Transactions, and Director Independence—Part III Hawaiian Electric’s Principal Accounting Fees and Services—Part III Selected sections of Proxy Statement of HEI for the 2021 Annual Meeting of Shareholders to be filed-Part III This combined Form 10-K represents separate filings by Hawaiian Electric Industries, Inc. and Hawaiian Electric Company, Inc. Information contained herein relating to any individual registrant is filed by each registrant on its own behalf. Hawaiian Electric makes no representations as to any information not relating to it or its subsidiaries.
Hawaiian Electric Company, Inc. and Subsidiaries
Entity Information [Line Items]
Entity Registrant Name	Hawaiian Electric Company, Inc.
Entity File Number	1-4955
Entity Tax Identification Number	99-0040500
Entity Central Index Key	0000046207
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Address, Address Line One	1001 Bishop Street, Suite 2500
Entity Address, City or Town	Honolulu
Entity Address, State or Province	HI
Entity Address, Postal Zip Code	96813
City Area Code	808
Local Phone Number	543-7771
Title of 12(g) Security	Cumulative Preferred Stock
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		17,324,376

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenues
Revenues	$ 2,579,775	$ 2,873,948	$ 2,860,849
Expenses
Total expenses	2,268,282	2,525,927	2,527,493
Operating income (loss)
Operating income	311,493	348,021	333,356
Retirement defined benefits expense—other than service costs	(3,210)	(2,806)	(5,962)
Interest expense, net – other than on deposit liabilities and other bank borrowings	(88,694)	(90,899)	(88,677)
Allowance for borrowed funds used during construction	2,992	4,453	4,867
Allowance for equity funds used during construction	8,768	11,987	10,877
Gain on sale of investment securities, net	9,275	653	0
Income before income taxes	240,624	271,409	254,461
Income taxes	40,910	51,637	50,797
Net income (loss)	199,714	219,772	203,664
Preferred stock dividends of subsidiaries	1,890	1,890	1,890
Net income for common stock	$ 197,824	$ 217,882	$ 201,774
Basic earnings per common share (in dollars per share)	$ 1.81	$ 2	$ 1.85
Diluted earnings per common share (in dollars per share)	$ 1.81	$ 1.99	$ 1.85
Weighted-average number of common shares outstanding (in shares)	109,140	108,949	108,855
Net effect of potentially dilutive shares (in shares)	216	458	291
Weighted-average shares assuming dilution (in shares)	109,356	109,407	109,146
Electric utility
Revenues
Revenues	$ 2,265,320	$ 2,545,942	$ 2,546,525
Expenses
Total expenses	1,996,770	2,291,564	2,304,864
Operating income (loss)
Operating income	268,550	254,378	241,661
Income before income taxes	211,753	197,140	180,426
Income taxes	40,418	38,305	34,778
Net income (loss)	171,335	158,835	145,648
Preferred stock dividends of subsidiaries	1,995	1,995	1,995
Net income for common stock	169,340	156,840	143,653
Bank
Revenues
Revenues	313,511	327,917	314,275
Expenses
Total expenses	251,702	217,008	206,040
Operating income (loss)
Operating income	61,809	110,909	108,235
Income before income taxes	69,271	112,034	106,578
Income taxes	11,688	23,061	24,069
Net income (loss)	57,583	88,973	82,509
Preferred stock dividends of subsidiaries	0	0	0
Net income for common stock	57,583	88,973	82,509
Other
Revenues
Revenues	944	89	49
Expenses
Total expenses	19,810	17,355	16,589
Operating income (loss)
Operating income	(18,866)	(17,266)	(16,540)
Income before income taxes	(40,400)	(37,765)	(32,543)
Income taxes	(11,196)	(9,729)	(8,050)
Net income (loss)	(29,204)	(28,036)	(24,493)
Preferred stock dividends of subsidiaries	(105)	(105)	(105)
Net income for common stock	$ (29,099)	$ (27,931)	$ (24,388)

Consolidated Statements of In_2

Consolidated Statements of Income (Parenthetical) $ in Millions	12 Months Ended
	Dec. 31, 2019USD ($)
Bank
Gain on sale of properties	$ 10.8

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income for common stock	$ 197,824	$ 217,882	$ 201,774
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 of $7,008, $10,024 and $(3,468) for 2020, 2019 and 2018, respectively	19,143	27,382	(9,472)
Reclassification adjustment for net realized gains included in net income, net of taxes of $(599), $(175) and nil for 2020, 2019 and 2018, respectively	(1,638)	(478)	0
Derivatives qualified as cash flow hedges:
Unrealized interest rate hedging losses, net of taxes of $(607), $(409) and $(151) for 2020, 2019 and 2018, respectively	(1,750)	(1,177)	(436)
Retirement benefit plans:
Net gains (losses) arising during the period, net of taxes of $(20,907), $3,892 and $(9,810) for 2020, 2019 and 2018, respectively	(60,529)	10,914	(28,101)
Adjustment for amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of taxes of $8,247, $3,512 and $7,317 for 2020, 2019 and 2018, respectively	23,689	10,107	21,015
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of taxes of $13,825, $(5,610) and $2,887 for 2020, 2019 and 2018, respectively	39,860	(16,177)	8,325
Other comprehensive income (loss), net of taxes	18,775	30,571	(8,669)
Comprehensive income	$ 216,599	$ 248,453	$ 193,105

Consolidated Statements of Co_2

Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Comprehensive Income [Abstract]
Net unrealized gains (losses) on securities arising during the period, tax (benefits)	$ 7,008	$ 10,024	$ (3,468)
Reclassification adjustment for net realized gains included in net income, tax expenses	(599)	(175)	0
Foreign currency hedge net unrealized loss, taxes (benefits)	(607)	(409)	(151)
Net gains (losses) arising during the period, taxes (benefits)	(20,907)	3,892	(9,810)
Amortization of net loss, prior service gain and transition obligation included in net periodic benefit cost, tax benefits	8,247	3,512	7,317
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, (taxes) benefits	$ 13,825	$ (5,610)	$ 2,887

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
ASSETS
Cash and cash equivalents	$ 341,421	$ 196,813
Restricted cash	17,558	30,872
Accounts receivable and unbilled revenues, net	281,216	300,794
Available-for-sale investment securities, at fair value	1,970,417	1,232,826
Held-to-maturity investment securities, at amortized cost	226,947	139,451
Stock in Federal Home Loan Bank, at cost	8,680	8,434
Loans and leases receivable before fees, gross	5,232,642	5,067,821
Loans held for sale, at lower of cost or fair value	28,275	12,286
Property, plant and equipment, net
Land	103,428	100,161
Plant and equipment	7,851,185	7,545,083
Construction in progress	214,266	229,953
Property, plant and equipment, gross	8,168,879	7,875,197
Less – accumulated depreciation	(2,903,144)	(2,765,569)
Total property, plant and equipment, net	5,265,735	5,109,628
Operating lease right-of-use-assets	153,069	199,171
Regulatory assets	766,708	715,080
Other	629,149	649,885
Goodwill	82,190	82,190
Total assets	15,004,007	13,745,251
Liabilities
Accounts payable	182,347	220,633
Interest and dividends payable	23,547	24,941
Deposit liabilities	7,386,957	6,271,902
Short-term borrowings—other than bank	129,379	185,710
Other bank borrowings	89,670	115,110
Long-term debt, net—other than bank	2,119,129	1,964,365
Deferred income taxes	395,089	379,324
Operating lease liabilities	160,432	199,571
Regulatory liabilities	959,786	972,310
Defined benefit pension and other postretirement benefit plans liability	567,438	513,287
Other	618,438	583,545
Total liabilities	12,632,212	11,430,698
Preferred stock of subsidiaries - not subject to mandatory redemption	34,293	34,293
Commitments and contingencies (Notes 3 and 4)
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: 109,181,124 shares and 108,973,328 shares at December 31, 2020 and 2019, respectively	1,678,368	1,678,257
Retained earnings	660,398	622,042
Accumulated other comprehensive income (loss), net of taxes
Net unrealized gains on securities	19,986	2,481
Unrealized losses on derivatives	(3,363)	(1,613)
Retirement benefit plans	(17,887)	(20,907)
Accumulated other comprehensive income (loss), net of taxes	(1,264)	(20,039)
Total shareholders’ equity	2,337,502	2,280,260
Total capitalization and liabilities	$ 15,004,007	$ 13,745,251

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - shares	Dec. 31, 2020	Dec. 31, 2019
Shareholders’ equity
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)	109,181,124	108,973,328
Common stock, outstanding shares (in shares)	109,181,124	108,973,328

Consolidated Statements of Chan

Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Total	Impact of ASU No. 2016-13	As reported under ASU No. 2016-13	Common stock	Common stockAs reported under ASU No. 2016-13	Retained earnings	Retained earningsImpact of ASU No. 2016-13	Retained earningsAs reported under ASU No. 2016-13	Accumulated other comprehensive income (loss)	Accumulated other comprehensive income (loss)As reported under ASU No. 2016-13
Balance (in shares) at Dec. 31, 2017				108,788,000
Beginning Balance at Dec. 31, 2017	$ 2,097,386			$ 1,662,491		$ 476,836			$ (41,941)
Increase (decrease) in stockholders' equity
Net income for common stock	201,774					201,774
Other comprehensive income (loss), net of taxes (benefits)	(8,669)								(8,669)
Issuance of common stock:
Share-based plans (in shares)				91,000
Share-based plans	2,650			$ 2,650
Share-based expenses and other, net	4,126			4,126
Common stock dividends	(134,987)					(134,987)
Ending Balance at Dec. 31, 2018	2,162,280			$ 1,669,267		543,623			(50,610)
Balance (in shares) at Dec. 31, 2018				108,879,000
Increase (decrease) in stockholders' equity
Net income for common stock	217,882					217,882
Other comprehensive income (loss), net of taxes (benefits)	30,571								30,571
Issuance of common stock:
Share-based plans (in shares)				94,000
Share-based plans	3,092			$ 3,092
Share-based expenses and other, net	5,898			5,898
Common stock dividends	(139,463)					(139,463)
Ending Balance at Dec. 31, 2019	$ 2,280,260	$ (15,372)	$ 2,264,888	$ 1,678,257	$ 1,678,257	622,042	$ (15,372)	$ 606,670	(20,039)	$ (20,039)
Balance (in shares) at Dec. 31, 2019	108,973,328			108,973,000	108,973,000
Issuance of common stock:
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201613Member
Net income for common stock	$ 197,824					197,824
Other comprehensive income (loss), net of taxes (benefits)	18,775								18,775
Share-based plans (in shares)				208,000
Share-based plans	3,973			$ 3,973
Share-based expenses and other, net	(3,862)			(3,862)
Common stock dividends	(144,096)					(144,096)
Ending Balance at Dec. 31, 2020	$ 2,337,502			$ 1,678,368		$ 660,398			$ (1,264)
Balance (in shares) at Dec. 31, 2020	109,181,124			109,181,000

Consolidated Statements of Ch_2

Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) - $ / shares	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Stockholders' Equity [Abstract]
Common stock dividends (in dollars per share)	$ 0.33	$ 0.33	$ 0.33	$ 0.33	$ 0.32	$ 0.32	$ 0.32	$ 0.32	$ 1.32	$ 1.28	$ 1.24

Consolidated Statements of Cash

Consolidated Statements of Cash Flows $ in Thousands	12 Months Ended
	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Cash flows from operating activities
Net income	$ 199,714	$ 219,772	$ 203,664
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation of property, plant and equipment	238,114	229,858	214,036
Other amortization	52,664	48,255	41,593
Provision for credit losses	50,811	23,480	14,745
Loans originated, held for sale	(564,525)	(285,042)	(109,537)
Proceeds from sale of loans, held for sale	567,652	277,119	112,182
Gain on sale of real estate, held for sale	0	(10,762)	0
Gain on sale of investment securities, net	(9,275)	(653)	0
Gain on sale of loans	(23,734)	(4,943)	(1,493)
Deferred income taxes	(1,706)	(15,085)	(9,368)
Share-based compensation expense	5,810	9,986	7,792
Allowance for equity funds used during construction	(8,768)	(11,987)	(10,877)
Other	1,366	18,568	(521)
Changes in assets and liabilities
Decrease (increase) in accounts receivable and unbilled revenues, net	2,533	23,933	(66,526)
Decrease (increase) in fuel oil stock	34,202	(11,493)	7,054
Decrease in regulatory assets	1,007	71,262	9,252
Increase (decrease) in regulatory liabilities	(16,562)	1,953	37,358
Increase (decrease) in accounts, interest and dividends payable	(20,068)	(3,054)	21,528
Change in prepaid and accrued income taxes, tax credits and utility revenue taxes	(35,610)	(27,538)	29,429
Increase (decrease) in defined benefit pension and other postretirement benefit plans liability	(2,029)	(4,482)	20,871
Change in other assets and liabilities	(42,189)	(36,677)	(21,870)
Net cash provided by operating activities	429,407	512,470	499,312
Cash flows from investing activities
Available-for-sale investment securities purchased	(1,361,594)	(108,088)	(224,335)
Principal repayments on available-for-sale investment securities	478,351	272,949	218,930
Proceeds from sale of available-for-sale investment securities	169,157	19,810	0
Purchases of held-to-maturity investment securities	(146,738)	(13,057)	(103,184)
Proceeds from repayments or maturities of held-to-maturity investment securities	59,894	15,505	5,720
Purchase of stock from Federal Home Loan Bank	(27,350)	(95,636)	(28,292)
Redemption of stock from Federal Home Loan Bank	27,104	97,160	28,040
Net increase in loans held for investment	(229,311)	(300,210)	(189,352)
Proceeds from sale of commercial loans	0	0	7,149
Proceeds from sale of real estate held for sale	0	21,060	0
Capital expenditures	(383,895)	(457,520)	(506,770)
Proceeds from sale of low income housing investments	6,725	1	473
Contributions to low income housing investments	(9,403)	(6,974)	(14,499)
Other, net	3,412	13,291	14,061
Net cash used in investing activities	(1,413,648)	(541,709)	(792,059)
Cash flows from financing activities
Net increase in deposit liabilities	1,115,055	113,050	165,880
Net increase (decrease) in short-term borrowings with original maturities of three months or less	(71,219)	86,718	(18,999)
Proceeds from issuance of short-term debt	165,000	75,000	25,000
Repayment of short-term debt	(150,000)	(50,000)	(50,000)
Net increase (decrease) in other bank borrowings with original maturities of three months or less	(25,440)	5,070	71,556
Proceeds from issuance of other bank borrowings	30,000	0	0
Repayment of other bank borrowings	(30,000)	0	(50,000)
Proceeds from issuance of long-term debt	415,997	289,349	250,000
Repayment of long-term debt and funds transferred for repayment of long-term debt	(178,969)	(287,285)	(53,887)
Withheld shares for employee taxes on vested share-based compensation	(5,700)	(997)	(996)
Common stock dividends	(144,096)	(139,463)	(134,987)
Preferred stock dividends of subsidiaries	(1,890)	(1,890)	(1,890)
Other	(3,203)	(1,836)	(1,603)
Net cash used in financing activities	1,115,535	87,716	200,074
Net decrease in cash and equivalents	131,294	58,477	(92,673)
Cash, cash equivalents and restricted cash, January 1	227,685	169,208	261,881
Cash, cash equivalents and restricted cash, December 31	358,979	227,685	169,208
Less: Restricted cash	(17,558)	(30,872)	0
Cash and cash equivalents, December 31	$ 341,421	$ 196,813	$ 169,208

Consolidated Statements of In_3

Consolidated Statements of Income - HECO Statement - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenues	$ 652,217	$ 641,427	$ 608,945	$ 677,186	$ 725,966	$ 770,882	$ 715,485	$ 661,615	$ 2,579,775	$ 2,873,948	$ 2,860,849
Expenses
Total expenses									2,268,282	2,525,927	2,527,493
Operating income	80,674	99,561	71,556	59,702	100,795	96,655	72,634	77,937	311,493	348,021	333,356
Allowance for equity funds used during construction									8,768	11,987	10,877
Retirement defined benefits expense—other than service costs									(3,210)	(2,806)	(5,962)
Allowance for borrowed funds used during construction									2,992	4,453	4,867
Income before income taxes									240,624	271,409	254,461
Income taxes									40,910	51,637	50,797
Net income (loss)	50,958	65,503	49,360	33,893	66,736	63,890	42,985	46,161	199,714	219,772	203,664
Preferred stock dividends of subsidiaries									1,890	1,890	1,890
Net income for common stock	50,485	65,032	48,887	33,420	66,263	63,419	42,512	45,688	197,824	217,882	201,774
Hawaiian Electric Company, Inc. and Subsidiaries
Revenues	571,095	562,568	534,215	597,442	645,333	688,330	633,784	578,495	2,265,320	2,545,942	2,546,525
Expenses
Fuel oil									515,274	720,709	760,528
Purchased power									568,749	633,256	639,307
Other operation and maintenance									474,192	481,737	461,491
Depreciation									222,733	215,731	203,626
Taxes, other than income taxes									215,822	240,131	239,912
Total expenses									1,996,770	2,291,564	2,304,864
Operating income	68,273	88,518	67,801	43,958	70,331	71,793	55,694	56,560	268,550	254,378	241,661
Allowance for equity funds used during construction									8,768	11,987	10,877
Retirement defined benefits expense—other than service costs									(763)	(2,836)	(3,631)
Interest expense and other charges, net									(67,794)	(70,842)	(73,348)
Allowance for borrowed funds used during construction									2,992	4,453	4,867
Income before income taxes									211,753	197,140	180,426
Income taxes									40,418	38,305	34,778
Net income (loss)	43,540	60,563	42,828	24,404	45,860	47,277	33,073	32,625	171,335	158,835	145,648
Preferred stock dividends of subsidiaries									915	915	915
Net income attributable to Hawaiian Electric									170,420	157,920	144,733
Preferred stock dividends of Hawaiian Electric									1,080	1,080	1,080
Net income for common stock	$ 43,041	$ 60,065	$ 42,329	$ 23,905	$ 45,361	$ 46,779	$ 32,574	$ 32,126	$ 169,340	$ 156,840	$ 143,653

Consolidated Statements of Co_3

Consolidated Statements of Comprehensive Income - HECO - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Net income for common stock	$ 50,485	$ 65,032	$ 48,887	$ 33,420	$ 66,263	$ 63,419	$ 42,512	$ 45,688	$ 197,824	$ 217,882	$ 201,774
Retirement benefit plans:
Net gains (losses) arising during the period, net of taxes of $(21,868), $1,821 and $(9,024) for 2020, 2019 and 2018, respectively									(60,529)	10,914	(28,101)
Adjustment for amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of taxes of $7,474, $3,312 and $6,594 for 2020, 2019 and 2018, respectively									23,689	10,107	21,015
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of taxes of $13,825, $(5,610), and $2,887 for 2020, 2019 and 2018, respectively									39,860	(16,177)	8,325
Other comprehensive income (loss), net of taxes									18,775	30,571	(8,669)
Comprehensive income									216,599	248,453	193,105
Hawaiian Electric Company, Inc. and Subsidiaries
Net income for common stock	$ 43,041	$ 60,065	$ 42,329	$ 23,905	$ 45,361	$ 46,779	$ 32,574	$ 32,126	169,340	156,840	143,653
Retirement benefit plans:
Net gains (losses) arising during the period, net of taxes of $(21,868), $1,821 and $(9,024) for 2020, 2019 and 2018, respectively									(63,050)	5,249	(26,019)
Adjustment for amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of taxes of $7,474, $3,312 and $6,594 for 2020, 2019 and 2018, respectively									21,550	9,550	19,012
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of taxes of $13,825, $(5,610), and $2,887 for 2020, 2019 and 2018, respectively									39,860	(16,177)	8,325
Other comprehensive income (loss), net of taxes									(1,640)	(1,378)	1,318
Comprehensive income									$ 167,700	$ 155,462	$ 144,971

Consolidated Statements of Co_4

Consolidated Statements of Comprehensive Income (Parenthetical) - HECO - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Net gains (losses) arising during the period, taxes (benefits)	$ (20,907)	$ 3,892	$ (9,810)
Amortization of net loss, prior service gain and transition obligation included in net periodic benefit cost, tax benefits	8,247	3,512	7,317
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, (taxes) benefits	13,825	(5,610)	2,887
Hawaiian Electric Company, Inc. and Subsidiaries
Net gains (losses) arising during the period, taxes (benefits)	(21,868)	1,821	(9,024)
Amortization of net loss, prior service gain and transition obligation included in net periodic benefit cost, tax benefits	7,474	3,312	6,594
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, (taxes) benefits	$ 13,825	$ (5,610)	$ 2,887

Consolidated Balance Sheets - H

Consolidated Balance Sheets - HECO - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Utility property, plant and equipment
Total property, plant and equipment, net	$ 5,265,735	$ 5,109,628
Current assets
Cash and cash equivalents	341,421	196,813
Other long-term assets
Operating lease right-of-use-assets	153,069	199,171
Total assets	15,004,007	13,745,251
Capitalization
Common stock equity	2,337,502	2,280,260
Commitments and contingencies
Current liabilities
Current portion of operating lease liabilities	64,730	63,707
Interest and dividends payable	23,547	24,941
Deferred credits and other liabilities
Deferred income taxes	395,089	379,324
Total capitalization and liabilities	15,004,007	13,745,251
Hawaiian Electric Company, Inc. and Subsidiaries
Utility property, plant and equipment
Land	51,611	51,816
Plant and equipment	7,509,343	7,240,288
Less accumulated depreciation	(2,819,079)	(2,690,157)
Construction in progress	188,342	193,074
Utility property, plant and equipment, net	4,930,217	4,795,021
Nonutility property, plant and equipment, less accumulated depreciation of $115 and $111 as of December 31, 2020 and 2019, respectively	6,953	6,956
Total property, plant and equipment, net	4,937,170	4,801,977
Current assets
Cash and cash equivalents	47,360	11,022
Restricted cash	15,966	30,872
Customer accounts receivable, net	147,832	152,790
Accrued unbilled revenues, net	101,036	117,227
Other accounts receivable, net	7,673	11,568
Fuel oil stock, at average cost	58,238	91,937
Materials and supplies, at average cost	67,344	60,702
Prepayments and other	44,083	116,980
Regulatory assets	30,435	30,710
Total current assets	519,967	623,808
Other long-term assets
Operating lease right-of-use-assets	127,654	176,809
Regulatory assets	736,273	684,370
Other	136,309	101,718
Total other long-term assets	1,000,236	962,897
Total assets	6,457,373	6,388,682
Capitalization
Common stock equity	2,141,918	2,047,352
Cumulative preferred stock – not subject to mandatory redemption	34,293	34,293
Commitments and contingencies
Long-term debt, net	1,561,302	1,401,714
Total capitalization	3,737,513	3,483,359
Current liabilities
Current portion of operating lease liabilities	64,730	63,707
Current portion of long-term debt, net	0	95,953
Short-term borrowings from non-affiliate	49,979	88,987
Accounts payable	133,849	187,770
Interest and dividends payable	20,350	20,728
Taxes accrued, including revenue taxes	192,524	207,992
Regulatory liabilities	37,301	30,724
Other	74,262	67,305
Total current liabilities	572,995	763,166
Deferred credits and other liabilities
Operating lease liabilities	69,494	113,400
Deferred income taxes	397,798	377,150
Regulatory liabilities	922,485	941,586
Unamortized tax credits	111,915	117,868
Defined benefit pension and other postretirement benefit plans liability	530,532	478,763
Other	114,641	113,390
Total deferred credits and other liabilities	2,146,865	2,142,157
Total capitalization and liabilities	$ 6,457,373	$ 6,388,682

Consolidated Balance Sheets -_2

Consolidated Balance Sheets - HECO (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Hawaiian Electric Company, Inc. and Subsidiaries
Accumulated depreciation on other property, plant and equipment	$ 115	$ 111

Consolidated Statements of Capi

Consolidated Statements of Capitalization - HECO - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Common stock equity
Retained earnings	$ 660,398	$ 622,042
Accumulated other comprehensive loss, net of tax benefits-retirement benefit plans	(17,887)	(20,907)
Total shareholders’ equity	2,337,502	2,280,260
Hawaiian Electric Company, Inc. and Subsidiaries
Common stock equity
Common stock of $6 2/3 par value, Authorized: 50,000,000 shares. Outstanding: shares and 17,048,783 shares at December 31, 2020 and 2019, respectively	115,515	113,678
Premium on capital stock	746,987	714,824
Retained earnings	1,282,335	1,220,129
Accumulated other comprehensive loss, net of tax benefits-retirement benefit plans	(2,919)	(1,279)
Total shareholders’ equity	$ 2,141,918	$ 2,047,352
Shares outstanding December 31, 2020 and 2019	1,234,657	1,234,657
Cumulative preferred stock – not subject to mandatory redemption	$ 34,293	$ 34,293
Long-term debt	1,569,000	1,505,000
Less unamortized debt issuance costs	7,698	7,333
Less current portion long-term debt, net of unamortized debt issuance costs	0	95,953
Long-term debt, net	1,561,302	1,401,714
Total capitalization	3,737,513	3,483,359
Hawaiian Electric Company, Inc. and Subsidiaries | Special Purpose Revenue Bonds
Common stock equity
Long-term debt	542,000	542,000
Hawaiian Electric Company, Inc. and Subsidiaries | Special Purpose Revenue Bonds | 3.50%, Series 2019, due 2049
Common stock equity
Long-term debt	$ 80,000	80,000
Debt instrument, stated interest rate	3.50%
Hawaiian Electric Company, Inc. and Subsidiaries | Special Purpose Revenue Bonds | 3.20%, Refunding series 2019, due 2039
Common stock equity
Long-term debt	$ 150,000	150,000
Debt instrument, stated interest rate	3.20%
Hawaiian Electric Company, Inc. and Subsidiaries | Special Purpose Revenue Bonds | 3.10%, Refunding series 2017A, due 2026
Common stock equity
Long-term debt	$ 125,000	125,000
Debt instrument, stated interest rate	3.10%
Hawaiian Electric Company, Inc. and Subsidiaries | Special Purpose Revenue Bonds | 4.00%, Refunding series 2017B, due 2037
Common stock equity
Long-term debt	$ 140,000	140,000
Debt instrument, stated interest rate	4.00%
Hawaiian Electric Company, Inc. and Subsidiaries | Special Purpose Revenue Bonds | 3.25%, Refunding series 2015, due 2025
Common stock equity
Long-term debt	$ 47,000	47,000
Debt instrument, stated interest rate	3.25%
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes
Common stock equity
Long-term debt	$ 1,027,000	963,000
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 3.96%, Series 2020A, 2020B and 2020C, due 2050
Common stock equity
Long-term debt	$ 50,000	0
Debt instrument, stated interest rate	3.96%
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 3.31%, Series 2020A and 2020B, due 2030
Common stock equity
Long-term debt	$ 110,000	0
Debt instrument, stated interest rate	3.31%
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 4.21%, Series 2019A, due 2034
Common stock equity
Long-term debt	$ 50,000	50,000
Debt instrument, stated interest rate	4.21%
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 4.38%, Series 2018A, due 2028
Common stock equity
Long-term debt	$ 67,500	67,500
Debt instrument, stated interest rate	4.38%
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 4.53%, Series 2018B, due 2033
Common stock equity
Long-term debt	$ 17,500	17,500
Debt instrument, stated interest rate	4.53%
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 4.72%, Series 2018C, due 2048
Common stock equity
Long-term debt	$ 15,000	15,000
Debt instrument, stated interest rate	4.72%
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 4.31%, Series 2017A, due 2047
Common stock equity
Long-term debt	$ 50,000	50,000
Debt instrument, stated interest rate	4.31%
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 4.54%, Series 2016A, due 2046
Common stock equity
Long-term debt	$ 40,000	40,000
Debt instrument, stated interest rate	4.54%
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 5.23%, Series 2015A, due 2045
Common stock equity
Long-term debt	$ 80,000	80,000
Debt instrument, stated interest rate	5.23%
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 3.83%, Series 2013A, due 2020 - paid in 2020
Common stock equity
Long-term debt	$ 0	14,000
Debt instrument, stated interest rate	3.83%
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 4.45%, Series 2013A and 2013B, due 2022
Common stock equity
Long-term debt	$ 52,000	52,000
Debt instrument, stated interest rate	4.45%
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 4.84%, Series 2013A, 2013B and 2013C, due 2027
Common stock equity
Long-term debt	$ 100,000	100,000
Debt instrument, stated interest rate	4.84%
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 5.65%, Series 2013B and 2013C, due 2043
Common stock equity
Long-term debt	$ 70,000	70,000
Debt instrument, stated interest rate	5.65%
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 4.03%, Series 2012B, due 2020 - paid in 2020
Common stock equity
Long-term debt	$ 0	82,000
Debt instrument, stated interest rate	4.03%
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 4.55%, Series 2012B and 2012C, due 2023
Common stock equity
Long-term debt	$ 100,000	100,000
Debt instrument, stated interest rate	4.55%
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 4.72%, Series 2012D, due 2029
Common stock equity
Long-term debt	$ 35,000	35,000
Debt instrument, stated interest rate	4.72%
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 5.39%, Series 2012E, due 2042
Common stock equity
Long-term debt	$ 150,000	150,000
Debt instrument, stated interest rate	5.39%
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 4.53%, Series 2012F, due 2032
Common stock equity
Long-term debt	$ 40,000	$ 40,000
Debt instrument, stated interest rate	4.53%
Hawaiian Electric Company, Inc. and Subsidiaries | Preferred Stock $20 Par Value
Common stock equity
Preferred stock, par value (in dollars per share)	$ 20	$ 20
Hawaiian Electric Company, Inc. and Subsidiaries | Preferred Stock $100 Par Value
Common stock equity
Preferred stock, par value (in dollars per share)	100	$ 100
Hawaiian Electric | Series C, 4.25% Preferred Stock
Common stock equity
Preferred stock, par value (in dollars per share)	$ 20
Shares outstanding December 31, 2020 and 2019	150,000	150,000
Cumulative preferred stock – not subject to mandatory redemption	$ 3,000	$ 3,000
Hawaiian Electric | Series D, 5.00% Preferred Stock
Common stock equity
Preferred stock, par value (in dollars per share)	$ 20
Shares outstanding December 31, 2020 and 2019	50,000	50,000
Cumulative preferred stock – not subject to mandatory redemption	$ 1,000	$ 1,000
Hawaiian Electric | Series E, 5.00% Preferred Stock
Common stock equity
Preferred stock, par value (in dollars per share)	$ 20
Shares outstanding December 31, 2020 and 2019	150,000	150,000
Cumulative preferred stock – not subject to mandatory redemption	$ 3,000	$ 3,000
Hawaiian Electric | Series H, 5.25% Preferred Stock
Common stock equity
Preferred stock, par value (in dollars per share)	$ 20
Shares outstanding December 31, 2020 and 2019	250,000	250,000
Cumulative preferred stock – not subject to mandatory redemption	$ 5,000	$ 5,000
Hawaiian Electric | Series I, 5.00% Preferred Stock
Common stock equity
Preferred stock, par value (in dollars per share)	$ 20
Shares outstanding December 31, 2020 and 2019	89,657	89,657
Cumulative preferred stock – not subject to mandatory redemption	$ 1,793	$ 1,793
Hawaiian Electric | Series J, 4.75% Preferred Stock
Common stock equity
Preferred stock, par value (in dollars per share)	$ 20
Shares outstanding December 31, 2020 and 2019	250,000	250,000
Cumulative preferred stock – not subject to mandatory redemption	$ 5,000	$ 5,000
Hawaiian Electric | Series K, 4.65% Preferred Stock
Common stock equity
Preferred stock, par value (in dollars per share)	$ 20
Shares outstanding December 31, 2020 and 2019	175,000	175,000
Cumulative preferred stock – not subject to mandatory redemption	$ 3,500	$ 3,500
HELCO | Series G, 7.625% Preferred Stock
Common stock equity
Preferred stock, par value (in dollars per share)	$ 100
Shares outstanding December 31, 2020 and 2019	70,000	70,000
Cumulative preferred stock – not subject to mandatory redemption	$ 7,000	$ 7,000
Maui Electric | Series H, 7.625% Preferred Stock
Common stock equity
Preferred stock, par value (in dollars per share)	$ 100
Shares outstanding December 31, 2020 and 2019	50,000	50,000
Cumulative preferred stock – not subject to mandatory redemption	$ 5,000	$ 5,000

Consolidated Statements of Ca_2

Consolidated Statements of Capitalization - HECO (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Common stock, authorized shares (in shares)	200,000,000	200,000,000
Common stock, outstanding shares (in shares)	109,181,124	108,973,328
Hawaiian Electric Company, Inc. and Subsidiaries
Common stock, par value (in dollars per share)	$ 6.667	$ 6.667
Common stock, authorized shares (in shares)	50,000,000	50,000,000
Common stock, outstanding shares (in shares)	17,324,376	17,048,783
Shares outstanding	1,234,657	1,234,657
Hawaiian Electric Company, Inc. and Subsidiaries | Special Purpose Revenue Bonds | 3.50%, Series 2019, due 2049
Debt instrument, stated interest rate	3.50%
Hawaiian Electric Company, Inc. and Subsidiaries | Special Purpose Revenue Bonds | 3.20%, Refunding series 2019, due 2039
Debt instrument, stated interest rate	3.20%
Hawaiian Electric Company, Inc. and Subsidiaries | Special Purpose Revenue Bonds | 3.10% Refunding Series 2017A Due 2026
Debt instrument, stated interest rate	3.10%
Hawaiian Electric Company, Inc. and Subsidiaries | Special Purpose Revenue Bonds | 4.00% Refunding Series 2017B, Due 2037
Debt instrument, stated interest rate	4.00%
Hawaiian Electric Company, Inc. and Subsidiaries | Special Purpose Revenue Bonds | 3.25% Refunding Series 2015 SPRBs due 2025
Debt instrument, stated interest rate	3.25%
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 4.38%, Series 2018A, due 2028
Debt instrument, stated interest rate	4.38%
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 4.53%, Series 2018B, due 2033
Debt instrument, stated interest rate	4.53%
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 4.72%, Series 2018C, due 2048
Debt instrument, stated interest rate	4.72%
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 4.31%, Series 2017A, due 2047
Debt instrument, stated interest rate	4.31%
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 4.21%, Series 2019A, due 2034
Debt instrument, stated interest rate	4.21%
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 4.54%, Series 2016A, due 2046
Debt instrument, stated interest rate	4.54%
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 5.23%, Series 2015A, due 2045
Debt instrument, stated interest rate	5.23%
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 3.83%, Series 2013A, due 2020 - paid in 2020
Debt instrument, stated interest rate	3.83%
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 4.45%, Series 2013A and 2013B, due 2022
Debt instrument, stated interest rate	4.45%
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 4.84%, Series 2013A, 2013B and 2013C, due 2027
Debt instrument, stated interest rate	4.84%
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 5.65%, Series 2013B and 2013C, due 2043
Debt instrument, stated interest rate	5.65%
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 4.03%, Series 2012B, due 2020 - paid in 2020
Debt instrument, stated interest rate	4.03%
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 4.55%, Series 2012B and 2012C, due 2023
Debt instrument, stated interest rate	4.55%
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 4.72%, Series 2012D, due 2029
Debt instrument, stated interest rate	4.72%
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 5.39%, Series 2012E, due 2042
Debt instrument, stated interest rate	5.39%
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 4.53%, Series 2012F, due 2032
Debt instrument, stated interest rate	4.53%
Hawaiian Electric Company, Inc. and Subsidiaries | Preferred Stock $20 Par Value
Preferred stock, par value (in dollars per share)	$ 20	$ 20
Preferred stock, Authorized shares	5,000,000	5,000,000
Hawaiian Electric Company, Inc. and Subsidiaries | Preferred Stock $100 Par Value
Preferred stock, par value (in dollars per share)	$ 100	$ 100
Preferred stock, Authorized shares	7,000,000	7,000,000
Hawaiian Electric | Series C, 4.25% Preferred Stock
Preferred stock, par value (in dollars per share)	$ 20
Shares outstanding	150,000	150,000
Preferred stock, stated dividend rate	4.25%	4.25%
Hawaiian Electric | Series D, 5.00% Preferred Stock
Preferred stock, par value (in dollars per share)	$ 20
Shares outstanding	50,000	50,000
Preferred stock, stated dividend rate	5.00%	5.00%
Hawaiian Electric | Series E, 5.00% Preferred Stock
Preferred stock, par value (in dollars per share)	$ 20
Shares outstanding	150,000	150,000
Preferred stock, stated dividend rate	5.00%	5.00%
Hawaiian Electric | Series H, 5.25% Preferred Stock
Preferred stock, par value (in dollars per share)	$ 20
Shares outstanding	250,000	250,000
Preferred stock, stated dividend rate	5.25%	5.25%
Hawaiian Electric | Series I, 5.00% Preferred Stock
Preferred stock, par value (in dollars per share)	$ 20
Shares outstanding	89,657	89,657
Preferred stock, stated dividend rate	5.00%	5.00%
Hawaiian Electric | Series J, 4.75% Preferred Stock
Preferred stock, par value (in dollars per share)	$ 20
Shares outstanding	250,000	250,000
Preferred stock, stated dividend rate	4.75%	4.75%
Hawaiian Electric | Series K, 4.65% Preferred Stock
Preferred stock, par value (in dollars per share)	$ 20
Shares outstanding	175,000	175,000
Preferred stock, stated dividend rate	4.65%	4.65%
HELCO | Series G, 7.625% Preferred Stock
Preferred stock, par value (in dollars per share)	$ 100
Shares outstanding	70,000	70,000
Preferred stock, stated dividend rate	7.625%	7.625%
Maui Electric | Series H, 7.625% Preferred Stock
Preferred stock, par value (in dollars per share)	$ 100
Shares outstanding	50,000	50,000
Preferred stock, stated dividend rate	7.625%	7.625%

Consolidated Statements of Ch_3

Consolidated Statements of Changes in Common Stock Equity - HECO - USD ($) $ in Thousands	Total	Retained earnings	Accumulated other comprehensive income (loss)	Hawaiian Electric Company, Inc. and Subsidiaries	Hawaiian Electric Company, Inc. and SubsidiariesCommon stock	Hawaiian Electric Company, Inc. and SubsidiariesPremium on capital stock	Hawaiian Electric Company, Inc. and SubsidiariesRetained earnings	Hawaiian Electric Company, Inc. and SubsidiariesAccumulated other comprehensive income (loss)
Balance (in shares) at Dec. 31, 2017					16,142,000
Beginning Balance at Dec. 31, 2017	$ 2,097,386	$ 476,836	$ (41,941)	$ 1,845,283	$ 107,634	$ 614,675	$ 1,124,193	$ (1,219)
Increase (decrease) in stockholders' equity
Net income for common stock	201,774	201,774		143,653			143,653
Other comprehensive income (loss), net of taxes (benefits)	(8,669)		(8,669)	1,318				1,318
Issuance of common stock, net of expenses (in shares)					609,000
Share-based plans	2,650			70,692	$ 4,062	66,630
Common stock dividends	(134,987)	(134,987)		(103,305)			(103,305)
Ending Balance at Dec. 31, 2018	2,162,280	543,623	(50,610)	1,957,641	$ 111,696	681,305	1,164,541	99
Balance (in shares) at Dec. 31, 2018					16,751,000
Increase (decrease) in stockholders' equity
Net income for common stock	217,882	217,882		156,840			156,840
Other comprehensive income (loss), net of taxes (benefits)	30,571		30,571	(1,378)				(1,378)
Issuance of common stock, net of expenses (in shares)					297,000
Share-based plans	3,092			35,501	$ 1,982	33,519
Common stock dividends	(139,463)	(139,463)		(101,252)			(101,252)
Ending Balance at Dec. 31, 2019	$ 2,280,260	622,042	(20,039)	2,047,352	$ 113,678	714,824	1,220,129	(1,279)
Balance (in shares) at Dec. 31, 2019	108,973,328				17,048,000
Increase (decrease) in stockholders' equity
Net income for common stock	$ 197,824	197,824		169,340			169,340
Other comprehensive income (loss), net of taxes (benefits)	18,775		18,775	(1,640)				(1,640)
Issuance of common stock, net of expenses (in shares)					276,000
Share-based plans	3,973			34,000	$ 1,837	32,163
Common stock dividends	(144,096)	(144,096)		(107,134)			(107,134)
Ending Balance at Dec. 31, 2020	$ 2,337,502	$ 660,398	$ (1,264)	$ 2,141,918	$ 115,515	$ 746,987	$ 1,282,335	$ (2,919)
Balance (in shares) at Dec. 31, 2020	109,181,124				17,324,000

Consolidated Statements of Ca_3

Consolidated Statements of Cash Flows - HECO $ in Thousands	12 Months Ended
	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Cash flows from operating activities
Net income	$ 199,714	$ 219,772	$ 203,664
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation of property, plant and equipment	238,114	229,858	214,036
Other amortization	52,664	48,255	41,593
Deferred income taxes	(1,706)	(15,085)	(9,368)
Bad debt expense	2,115	2,150	2,205
Allowance for equity funds used during construction	(8,768)	(11,987)	(10,877)
Other	1,366	18,568	(521)
Changes in assets and liabilities
Decrease (increase) in fuel oil stock	34,202	(11,493)	7,054
Decrease in regulatory assets	1,007	71,262	9,252
Increase (decrease) in regulatory liabilities	(16,562)	1,953	37,358
Change in prepaid and accrued income taxes, tax credits and revenue taxes	(35,610)	(27,538)	29,429
Increase (decrease) in defined benefit pension and other postretirement benefit plans liability	(2,029)	(4,482)	20,871
Change in other assets and liabilities	(42,189)	(36,677)	(21,870)
Net cash provided by operating activities	429,407	512,470	499,312
Cash flows from investing activities
Capital expenditures	(383,895)	(457,520)	(537,369)
Other, net	3,412	13,291	14,061
Net cash used in investing activities	(1,413,648)	(541,709)	(792,059)
Cash flows from financing activities
Common stock dividends	(144,096)	(139,463)	(134,987)
Proceeds from issuance of long-term debt	415,997	289,349	250,000
Repayment of long-term debt and funds transferred for repayment of long-term debt	(178,969)	(287,285)	(53,887)
Net increase (decrease) in short-term borrowings from non-affiliates and affiliate with original maturities of three months or less	(71,219)	86,718	(18,999)
Proceeds from issuance of short-term debt	165,000	75,000	25,000
Repayment of short-term debt	(150,000)	(50,000)	(50,000)
Other	(3,203)	(1,836)	(1,603)
Net cash used in financing activities	1,115,535	87,716	200,074
Net decrease in cash and equivalents	131,294	58,477	(92,673)
Cash, cash equivalents and restricted cash, January 1	227,685	169,208	261,881
Cash, cash equivalents and restricted cash, December 31	358,979	227,685	169,208
Less: Restricted cash	(17,558)	(30,872)	0
Cash and cash equivalents	341,421	196,813	169,208
Hawaiian Electric Company, Inc. and Subsidiaries
Cash flows from operating activities
Net income	171,335	158,835	145,648
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation of property, plant and equipment	222,733	215,731	203,626
Other amortization	33,746	29,631	26,602
Deferred income taxes	3,151	(16,284)	(7,982)
State refundable credit	(9,961)	(8,369)	(6,239)
Bad debt expense	2,115	2,150	2,205
Allowance for equity funds used during construction	(8,768)	(11,987)	(10,877)
Accrued environmental reserve	6,556	406	273
Other	2,610	27,459	4,669
Changes in assets and liabilities
Decrease (increase) in accounts receivable	(7,286)	18,822	(53,086)
Decrease (increase) in accrued unbilled revenues	15,285	4,495	(14,720)
Decrease (increase) in fuel oil stock	33,699	(12,002)	6,938
Increase in materials and supplies	(6,642)	(5,498)	(807)
Decrease in regulatory assets	1,007	71,262	9,252
Increase (decrease) in regulatory liabilities	(16,562)	1,953	37,358
Increase (decrease) in accounts payable	(33,129)	(2,051)	24,358
Change in prepaid and accrued income taxes, tax credits and revenue taxes	(37,180)	(28,523)	25,036
Increase (decrease) in defined benefit pension and other postretirement benefit plans liability	(4,306)	(4,448)	18,746
Change in other assets and liabilities	(31,852)	(17,626)	(17,387)
Net cash provided by operating activities	336,551	423,956	393,613
Cash flows from investing activities
Capital expenditures	(350,864)	(419,898)	(415,264)
Other, net	6,070	11,374	10,082
Net cash used in investing activities	(344,794)	(408,524)	(405,182)
Cash flows from financing activities
Common stock dividends	(107,134)	(101,252)	(103,305)
Preferred stock dividends of Hawaiian Electric and subsidiaries	(1,995)	(1,995)	(1,995)
Proceeds from issuance of common stock	34,000	35,500	70,700
Proceeds from issuance of long-term debt	255,000	280,000	100,000
Repayment of long-term debt and funds transferred for repayment of long-term debt	(109,000)	(283,546)	(50,000)
Net increase (decrease) in short-term borrowings from non-affiliates and affiliate with original maturities of three months or less	(38,987)	38,987	(4,999)
Proceeds from issuance of short-term debt	100,000	75,000	25,000
Repayment of short-term debt	(100,000)	(50,000)	0
Other	(2,209)	(2,109)	(472)
Net cash used in financing activities	29,675	(9,415)	34,929
Net decrease in cash and equivalents	21,432	6,017	23,360
Cash, cash equivalents and restricted cash, January 1	41,894	35,877	12,517
Cash, cash equivalents and restricted cash, December 31	63,326	41,894	35,877
Less: Restricted cash	(15,966)	(30,872)	0
Cash and cash equivalents	$ 47,360	$ 11,022	$ 35,877

Summary of significant accounti

Summary of significant accounting policies	12 Months Ended
	Dec. 31, 2020
Accounting Policies [Abstract]
Summary of significant accounting policies	Note 1 · Summary of significant accounting policies General Hawaiian Electric Industries, Inc. (HEI) is a holding company with direct and indirect subsidiaries principally engaged in electric utility, banking, and renewable/sustainable infrastructure investment businesses operating in the State of Hawaii. HEI owns Hawaiian Electric Company, Inc. (Hawaiian Electric), ASB Hawaii, Inc. (ASB Hawaii), an intermediate holding company that owns American Savings Bank, F.S.B. (ASB), and Pacific Current, LLC (Pacific Current). Pacific Current’s significant subsidiaries include Hamakua Energy, LLC (Hamakua Energy) and Mauo, LLC (Mauo). Hawaiian Electric and its wholly owned operating subsidiaries, Hawaii Electric Light Company, Inc. (Hawaii Electric Light) and Maui Electric Company, Limited (Maui Electric), are regulated public electric utilities (collectively, the Utilities) in the business of generating, purchasing, transmitting, distributing and selling electric energy on all major islands in Hawaii other than Kauai. See Note 2. ASB is a federally chartered savings bank providing a full range of banking services to individual and business customers through its branch system in Hawaii. Hamakua Energy, owns and operates a 60-megawatt (MW) combined-cycle power plant, which sells the power it produces only to Hawaii Electric Light. Mauo is a commercial-scale, solar-plus-storage project (8.6 MW of solar and 42.3 MW of storage) currently under construction on the islands of Oahu and Maui. Basis of presentation. In preparing the consolidated financial statements in conformity with accounting principles generally accepted in the United States of America (GAAP), management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities and the reported amounts of revenues and expenses. Actual results could differ significantly from those estimates. Material estimates that are particularly susceptible to significant change for HEI and its subsidiaries (collectively, the Company) include the amounts reported as fair value for investment securities (ASB only); pension and other postretirement benefit obligations; contingencies and litigation; income taxes; regulatory assets and liabilities (Utilities only); electric utility unbilled revenues (Utilities only); asset retirement obligations (Utilities only); goodwill (ASB only) and allowance for credit losses (ASB only). Consolidation. The HEI consolidated financial statements include the accounts of HEI and its subsidiaries. The Hawaiian Electric consolidated financial statements include the accounts of Hawaiian Electric and its subsidiaries. When HEI or Hawaiian Electric has a controlling financial interest in another entity (usually, majority voting interest), that entity is consolidated. Investments in companies over which the Company or the Utilities have the ability to exercise significant influence, but not control, are accounted for using the equity method. The consolidated financial statements exclude variable interest entities (VIEs) when the Company or the Utilities are not the primary beneficiaries. In general, significant intercompany amounts are eliminated in consolidation (see Note 2 for exceptions). Cash and cash equivalents. The Utilities consider cash on hand, deposits in banks, money market accounts, certificates of deposit, short-term commercial paper of non-affiliates and liquid investments (with original maturities of three months or less) to be cash and cash equivalents. The Company considers the same items to be cash and cash equivalents as well as ASB’s deposits with the Federal Home Loan Bank (FHLB), federal funds sold (excess funds that ASB loans to other banks overnight at the federal funds rate) and securities purchased under resale agreements with original maturities of three months or less. Additionally, ASB is required by the Federal Reserve System to maintain noninterest-bearing cash reserves equal to a percentage of certain deposits. The reserve requirement for ASB at December 31, 2020 and 2019 was nil and $26.2 million, respectively. In March 2020, the Federal Reserve Board reduced the reserve requirement to 0% to support the depository institutions during the COVID-19 pandemic. Restricted cash. The Utilities consider funds on deposit with trustees, which represent the undrawn proceeds from the issuance of special purpose revenue bonds, to be restricted cash because these funds are available only to finance (or reimburse payment of) approved capital expenditures. In addition to the Utilities’ funds on deposit with trustees, the Company considers cash held by trustees related to secured loans at Pacific Current subsidiaries to be restricted cash. At December 31, 2020 and 2019, total restricted cash of the Company was $17.6 million and $30.9 million, respectively, and for the Utilities was $16.0 million and $30.9 million, respectively. Property, plant and equipment. Property, plant and equipment are reported at cost. Self-constructed electric utility plant includes engineering, supervision, administrative and general costs and an allowance for the cost of funds used during the Depreciation. Depreciation is computed primarily using the straight-line method over the estimated lives of the assets being depreciated. Electric utility plant additions in the current year are depreciated beginning January 1 of the following year in accordance with rate-making. Electric utility plant has lives ranging from 16 to 51 years for production plant, from 10 to 79 years for transmission and distribution plant, and from 5 to 50 years for general plant. The Utilities’ composite annual depreciation rate, which includes a component for cost of removal, was 3.2% in 2020, 2019 and 2018. Retirement benefits. Pension and other postretirement benefit costs are charged primarily to expense and electric utility plant (in the case of the Utilities). Funding for the Company’s qualified pension plans (Plans) is based on actuarial assumptions adopted by the Pension Investment Committee administering the Plans. The participating employers contribute amounts to pension trusts for the Plans in accordance with the funding requirements of the Employee Retirement Income Security Act of 1974, as amended (ERISA), including changes promulgated by the Pension Protection Act of 2006, and considering the deductibility of contributions under the Internal Revenue Code. The Company generally funds at least the net periodic pension cost during the year, subject to ERISA minimum and Internal Revenue Code limits and targeted funded status. Certain health care and/or life insurance benefits are provided to eligible retired employees and the employees’ beneficiaries and covered dependents. The Company generally funds the net periodic postretirement benefit costs other than pensions (except for executive life) for postretirement benefits other than pensions (OPEB), while maximizing the use of the most tax-advantaged funding vehicles, subject to cash flow requirements and reviews of the funded status with the consulting actuary. Environmental expenditures. The Company and the Utilities are subject to numerous federal and state environmental statutes and regulations. In general, environmental contamination treatment costs are charged to expense. Environmental costs are capitalized if the costs extend the life, increase the capacity, or improve the safety or efficiency of property; the costs mitigate or prevent future environmental contamination; or the costs are incurred in preparing the property for sale. Environmental costs are either capitalized or charged to expense when environmental assessments and/or remedial efforts are probable and the cost can be reasonably estimated. The Utilities review their sites and measure the liability quarterly by assessing a range of reasonably likely costs of each identified site using currently available information, including existing technology, presently enacted laws and regulations, experience gained at similar sites, and the probable level of involvement and financial condition of other potentially responsible parties. Income taxes. Deferred income tax assets and liabilities are established for the temporary differences between the financial reporting bases and the tax bases of the Company’s and the Utilities’ assets and liabilities at federal and state tax rates expected to be in effect when such deferred tax assets or liabilities are realized or settled. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the periods in which those temporary differences become deductible. Valuation allowances are established when necessary to reduce deferred income tax assets to the amount expected to be realized. HEI and the Utilities’ investment tax credits are deferred and amortized over the estimated useful lives of the properties to which the credits relate (and for the Utilities, this treatment is in accordance with Accounting Standards Codification (ASC) Topic 980, “Regulated Operations”). The Utilities are included in the consolidated income tax returns of HEI. However, income tax expense has been computed for financial statement purposes as if each utility filed a separate income tax return and Hawaiian Electric filed a consolidated Hawaiian Electric income tax return. Governmental tax authorities could challenge a tax return position taken by the Company. The Company and the Utilities use a “more-likely-than-not” recognition threshold and measurement standard for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. Fair value measurements. Fair value estimates are estimates of the price that would be received to sell an asset, or paid upon the transfer of a liability, in an orderly transaction between market participants at the measurement date. The fair value estimates are generally determined based on assumptions that market participants would use in pricing the asset or liability and are based on market data obtained from independent sources. However, in certain cases, the Company and the Utilities use their own assumptions about market participant assumptions based on the best information available in the circumstances. These valuations are estimates at a specific point in time, based on relevant market information, information about the financial instrument and judgments regarding future expected loss experience, economic conditions, risk characteristics of various financial instruments and other factors. These estimates do not reflect any premium or discount that could result if the Company or the Utilities were to sell its entire holdings of a particular financial instrument at one time. Because no active trading market exists for a portion of the Company’s and the Utilities’ financial instruments, fair value estimates cannot be determined with precision. Changes in the underlying assumptions used, including discount rates and estimates of future cash flows, could significantly affect the estimates. In addition, the tax ramifications related to the realization of the unrealized gains and losses could have a significant effect on fair value estimates, but have not been considered in making such estimates. The Company and the Utilities group their financial assets measured at fair value in three levels outlined as follows: Level 1: Inputs to the valuation methodology are quoted prices, unadjusted, for identical assets or liabilities in active markets. A quoted price in an active market provides the most reliable evidence of fair value and is used to measure fair value whenever available. Level 2: Inputs to the valuation methodology include quoted prices for similar assets or liabilities in active markets; inputs to the valuation methodology include quoted prices for identical or similar assets or liabilities in markets that are not active; or inputs to the valuation methodology that are derived principally from or can be corroborated by observable market data by correlation or other means. Level 3: Inputs to the valuation methodology are unobservable and significant to the fair value measurement. Level 3 assets and liabilities include financial instruments whose value is determined using discounted cash flow methodologies, as well as instruments for which the determination of fair value requires significant management judgment or estimation. Classification in the hierarchy is based upon the lowest level input that is significant to the fair value measurement of the asset or liability. For instruments classified in Level 1 and 2 where inputs are primarily based upon observable market data, there is less judgment applied in arriving at the fair value. For instruments classified in Level 3, management judgment is more significant due to the lack of observable market data. The Company reviews and updates the fair value hierarchy classifications on a quarterly basis. Changes from one quarter to the next related to the observability of inputs in fair value measurements may result in a reclassification between the fair value hierarchy levels and are recognized based on period-end balances. Fair value is also used on a nonrecurring basis to evaluate certain assets for impairment or for disclosure purposes. Examples of nonrecurring uses of fair value include mortgage servicing rights accounted for by the amortization method, loan impairments for certain loans, real estate acquired in settlement of loans, goodwill and asset retirement obligations (AROs). Earnings per share (HEI only). Basic earnings per share (EPS) is computed by dividing net income for common stock by the weighted-average number of common shares outstanding for the period. Diluted EPS is computed similarly, except that dilutive common shares for stock compensation is added to the denominator. There were no shares of antidilutive securities outstanding during the years ended December 31, 2020, 2019 and 2018. Impairment of long-lived assets and long-lived assets to be disposed of. The Company and the Utilities review long-lived assets and certain identifiable intangibles for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset to future undiscounted net cash flows expected to be generated by the asset. If such assets are considered to be impaired, the impairment to be recognized is measured by the amount by which the carrying amount of the assets exceeds the fair value of the assets. Assets to be disposed of are reported at the lower of the carrying amount or fair value, less costs to sell. Recent accounting pronouncements. Credit losses . In June 2016, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2016-13, “Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments,” which replaces the incurred loss methodology with an expected loss methodology. The new methodology is referred to as the current expected credit loss (CECL) methodology and applies to financial assets subject to credit losses and measured at amortized cost and certain off-balance sheet credit exposures. This includes, but is not limited to loans, loan commitments and held-to-maturity securities. 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 has been 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 requires the use of an allowance to record the estimated losses (and subsequent recoveries). The Company adopted ASU No. 2016-13 on January 1, 2020 using the modified retrospective method with the cumulative effect of initially applying the amendments recognized in retained earnings as of January 1, 2020. The CECL models use a probability-of-default, loss given default and exposure at default methodology to estimate the expected credit losses. Within each model or calculation, loans are further segregated based on additional risk characteristics specific to that loan type, such as risk rating, FICO score, bankruptcy score, age of loan and collateral. The Company uses both internal and external historical data, as appropriate, and a blend of economic forecasts to estimate credit losses over a reasonable and supportable forecast period and then reverts to a longer-term historical loss experience to arrive at lifetime expected credit losses. The reversion period incorporates forward-looking expectations about repayments (including prepayments) as determined by the Company’s asset liability management system. The allowance for credit losses (ACL) is a material estimate of the Company. As a result of the change from an incurred loss model to a methodology that considers the credit loss over the expected life of the loan, on January 1, 2020, the Company recorded an adjustment of $21 million to increase the ACL, including a $2 million increase in the allowance for loan commitments, with a corresponding adjustment to reduce retained earnings by $15 million on an after-tax basis . The ACL is based on the composition, characteristics and quality of the loans and off balance sheet credit exposures as well as the prevailing economic conditions as of the adoption date. The increase in the ACL primarily relates to required reserves for residential mortgages and consumer loans, due to the requirement to estimate lifetime expected credit losses, with lower ACL requirements for commercial and commercial real estate loans due to their short-term nature. Based on the credit quality of the Company’s existing held-to-maturity and AFS investment securities portfolio, the Company did not recognize an ACL at adoption for those investments. The adoption of the new standard did not have a material impact to the Utilities’ customer and other accounts receivables and accrued unbilled revenue. Results for reporting periods beginning after January 1, 2020 are presented under ASU No. 2016-13 while prior period amounts continue to be reported in accordance with previously applicable GAAP (see Note 4). The table below summarizes the impact of the Company’s adoption of ASU No. 2016-13. January 1, 2020 (in thousands) Pre-ASU No. 2016-13 adoption Impact of ASU No. 2016-13 As reported under ASU No. 2016-13 HEI consolidated Loans held for investments, net 1 $ 5,067,821 $ (19,441) $ 5,048,380 Total assets 13,745,251 (19,441) 13,725,810 Deferred income taxes 379,324 (5,628) 373,696 Other 1 583,545 1,559 585,104 Total liabilities 11,430,698 (4,069) 11,426,629 Retained earnings 622,042 (15,372) 606,670 Total shareholders’ equity 2,280,260 (15,372) 2,264,888 Total liabilities and shareholders’ equity 13,745,251 (19,441) 13,725,810 1 The allowance for credit losses is classified in “Loans held for investments, net,” and the allowance for loan commitments is classified in “Other” liabilities in the Company’s consolidated balance sheets. Income Taxes . In December 2019, FASB issued ASU No. 2019-12, “Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes,” which removes specific exceptions to the general principles in Topic 740, improves financial statement preparers’ application of income tax-related guidance and simplifies GAAP under certain situations. ASU 2019-12 is effective for public business entities for fiscal years beginning after December 15, 2020, and interim periods within those fiscal years. The Company does not anticipate that the adoption of this ASU will have a material impact on its consolidated financial statements and related disclosures. Reclassifications. Certain reclassifications of prior year amounts were made to conform to the current-year financial statement presentation. Reclassifications did not affect previously reported cash flows, net income or retained earnings. Electric utility Regulation by the Public Utilities Commission of the State of Hawaii (PUC). The Utilities are regulated by the PUC and account for the effects of regulation under FASB ASC Topic 980, “Regulated Operations.” As a result, the Utilities’ financial statements reflect assets, liabilities, revenues and expenses based on current cost-based rate-making regulations (see Note 3—“Regulatory assets and liabilities”). Their continued accounting under ASC Topic 980 generally requires that rates are established by an independent, third-party regulator; rates are designed to recover the costs of providing service; and it is reasonable to assume that rates can be charged to, and collected from, customers. Management believes that the operations of the Utilities, including the impact of the newly approved PBR Framework, currently satisfy the criteria under ASC Topic 980. The rate schedules of the Utilities include energy costs recovery clauses (ECRCs) under which electric rates are adjusted for changes in the weighted-average price paid for fuel oil and certain components of purchased power, and the relative amounts of company-generated power and purchased power. The rate schedules also include purchased power adjustment clauses (PPACs) under which the remaining purchase power expenses are recovered through surcharge mechanisms. The amounts collected through the ECRCs and PPACs are required to be reconciled quarterly. Accounts receivable. Accounts receivable are recorded at the invoiced amount. The Utilities generally assess a late payment charge on balances unpaid from the previous month. The allowance for doubtful accounts is the Utilities’ best estimate of the amount of probable credit losses in the Utilities’ existing accounts receivable. Due to the economic impact of COVID on customers and the moratorium on electric service disconnections through March 31, 2021, the allowance for doubtful accounts increased in 2020. At December 31, 2020 and 2019, the allowance for customer accounts receivable, accrued unbilled revenues and other accounts receivable was $17.8 million and $1.4 million, respectively. Electric utility revenues. Revenues related to electric service are generally recorded when service is rendered and include revenues applicable to energy consumed in the accounting period but not yet billed to the customers. The Utilities also record revenue under a decoupling mechanism. See “ Current Decoupling” discussion in Note 3 - Electric utility segment. Repairs and maintenance costs. Repairs and maintenance costs for overhauls of generating units are generally expensed as they are incurred. Allowance for funds used during construction (AFUDC). AFUDC represents the estimated costs of debt (i.e., interest) and equity funds used to finance plant construction. AFUDC is credited on the statement of income and charged to construction in progress on the balance sheet. If a project under construction is delayed for an extended period of time, AFUDC on the delayed project may be stopped after assessing the causes of the delay and probability of recovery. The tax gross up of the allowance for equity funds used during construction is credited to income taxes on the statement of income and charged to a regulatory asset. This gross up, net of amortization of the regulatory asset, is reflected in income tax expense. The weighted-average AFUDC rate was 7.1% in 2020, 7.4% in 2019 and 7.3% in 2018, and reflected quarterly compounding. Asset retirement obligations . AROs are accounted for in accordance with ASC 410-20, Asset Retirement Obligations . AROs are recognized at present value of expected costs to retire long-lived assets from service, provided a legal obligation exists and a reasonable estimate of the fair value and the settlement date can be made. In the subsequent period, the liability is accreted to its future value while the asset retirement cost is depreciated over the estimated useful life of the underlying asset. The Utilities’ recognition of AROs have no impact on earnings, as the cost of the AROs are recovered over the life of the asset through depreciation. AROs recognized by the Utilities relate to legal obligations with the retirement of plant and equipment, including removal of asbestos and other hazardous materials. See “ Asset retirement obligations ” in Note 3 - Electric utility segment. Bank (HEI only) Investment securities. Investments in debt securities are classified as held-to-maturity (HTM), trading or available-for-sale (AFS). ASB determines the appropriate classification at the time of purchase. Debt securities that ASB intends to and has the ability to hold to maturity are classified as HTM securities and reported at amortized cost. Marketable debt securities that are bought and held principally for the purpose of selling them in the near term are classified as trading securities and reported at fair value, with unrealized gains and losses included in earnings. Marketable debt securities not classified as either HTM or trading securities are classified as AFS and reported at fair value. Unrealized gains and losses for AFS securities are excluded from earnings and reported on a net basis in accumulated other comprehensive income (AOCI) until realized. Interest income is recorded on an accrual basis. Discounts and premiums on securities are accreted or amortized into interest income using the interest method over the remaining contractual lives of the agency obligation securities and the estimated lives of the mortgage-backed securities adjusted for anticipated prepayments. ASB uses actual prepayment experience and estimates of future prepayments to determine the constant effective yield necessary to apply the interest method of income recognition. The discounts and premiums on the agency obligations portfolio are accreted or amortized on a prospective basis using expected contractual cash flows. The discounts and premiums on the mortgage-backed securities portfolio are accreted or amortized on a retrospective basis using changes in anticipated prepayments. This method requires a retrospective adjustment of the effective yield each time ASB changes the estimated life as if the new estimate had been known since the original acquisition date of the securities. Estimates of future prepayments are based on the underlying collateral characteristics and historic or projected prepayment behavior of each security. The specific identification method is used in determining realized gains and losses on the sales of securities. AFS debt securities with unrealized losses are reviewed quarterly. ASB will first assess whether it intends to sell, or it is more likely than not that it will be required to sell the security before recovery of its amortized cost basis. If either criteria is met, the security’s amortized cost basis is written down to fair value through income. For AFS securities that do not meet the aforementioned criteria, ASB evaluates whether the decline in fair value is the result of a credit loss or other factors. The determination of whether or not a credit loss exists is based on consideration of the cash flows expected to be collected from the debt security. ASB develops these expectations after considering various factors such as agency ratings, the financial condition of the issuer, payment history, payment structure of the security, industry and market conditions, underlying collateral and other factors which may be relevant based on the facts and circumstances pertaining to individual securities. If this assessment indicates that a credit loss exists, the present value of cash flows expected to be collected from the security are compared to the amortized cost basis of the security. If the present value of cash flows expected to be collected is less than the amortized cost basis, a credit loss exists and an allowance for credit losses is recorded for the credit loss, limited by the amount that the fair value is less than the amortized cost basis. Any impairment that has not been recorded through an allowance for credit losses is recognized in other comprehensive income. Changes in the allowance for credit losses are recorded as a provision for (or reversal of) credit losses. Losses are charged against the allowance when management believes the uncollectibility of an AFS security is confirmed or when either of the criteria regarding intent or requirement to sell is met. As of December 31, 2020, 2019 and 2018, there was no indicated impairment as ASB expects to collect the contractual cash flows for these investments. Held-to-maturity debt securities are assessed periodically to determine if a valuation allowance is necessary to absorb credit losses expected to occur over the remaining contractual life of the securities. The carrying amount of held-to-maturity debt securities is presented net of the valuation allowance for credit losses when such an allowance is deemed necessary. Stock in FHLB is carried at cost and is reviewed at least quarterly for impairment, with valuation adjustments recognized in noninterest income. Loans . ASB carries loans at amortized cost less the allowance for credit losses, loan origination fees (net of direct loan origination costs), commitment fees and purchase premiums and discounts. Interest on loans is credited to income as it is earned. Discounts and premiums are accreted or amortized over the life of the loans using the interest method. Loan origination fees (net of direct loan origination costs) are deferred and recognized as an adjustment in yield over periods not exceeding the contractual life of the loan using the interest method or taken into income when the loan is paid off or sold. Nonrefundable commitment fees (net of direct loan origination costs, if applicable) received for commitments to originate or purchase loans are deferred and, if the commitment is exercised, recognized as an adjustment of yield over the life of the loan using the interest method. Nonrefundable commitment fees received for which the commitment expires unexercised are recognized as income upon expiration of the commitment. Loans held for sale are stated at the lower of cost or estimated fair value on an aggregate basis. Premiums, discounts and net deferred loan fees are not amortized while a loan is classified as held for sale. A sale is recognized only when the consideration received is other than beneficial interests in the assets sold and control over the assets is transferred irrevocably to the buyer. Gains or losses on sales of loans are recognized at the time of sale and are determined by the difference between the net sales proceeds and the allocated basis of the loans sold. Allowance for credit losses. The ACL represents management’s estimate of expected credit losses over the expected contractual life of the related loans as of the balance sheet date. Contractual terms are adjusted for expected prepayments but are not extended for expected extensions, renewals or modifications except in circumstances where ASB reasonably expects to execute a troubled debt restructuring with the borrower or where certain extension or renewal options are embedded in the original contract and not unconditionally cancellable by the bank. Accrued interest receivables on loans are presented in the Consolidated Financial Statements as a component of other assets. When accrued interest is deemed to be uncollectible (typically when a loan is placed on nonaccrual status), interest income is reversed against interest income on loans. ASB follows established policies for placing loans on nonaccrual status, so uncollectible accrued interest receivable is reversed in a timely manner. As a result, the bank has elected not to measure an allowance for credit losses for accrued interest receivables. Credit losses are charged and recoveries are credited to the ACL. The ACL is maintained at a level the Bank considers to be adequate and is based on ongoing assessments and evaluations of the collectability of loans. The bank’s expected credit loss models consider historical credit loss experience, current market and economic conditions, and forecasted changes in market and economic conditions if such forecasts are considered reasonable and

Segment financial information

Segment financial information	12 Months Ended
	Dec. 31, 2020
Segment Reporting [Abstract]
Segment financial information	Note 2 · Segment financial information The electric utility and bank segments are strategic business units of the Company that offer different products and services and operate in different regulatory environments. The accounting policies of the segments are the same as those described for the Company in the summary of significant accounting policies, except as otherwise indicated and except that federal and state income taxes for each segment are calculated on a “stand-alone” basis. HEI evaluates segment performance based on net income. Each segment accounts for intersegment sales and transfers as if the sales and transfers were to third parties (i.e., at current market prices). Intersegment revenues consist primarily of Hamakua Energy revenues, interest, rent and preferred stock dividends. Electric utility Hawaiian Electric and its wholly owned operating subsidiaries, Hawaii Electric Light and Maui Electric, are public electric utilities in the business of generating, purchasing, transmitting, distributing and selling electric energy on all major islands in Hawaii other than Kauai, and are regulated by the PUC. The utility subsidiaries are aggregated within the electric utility segment because they: (1) are involved in the business of supplying electric energy in the same geographical location (i.e., the State of Hawaii), (2) have similar production processes that comprise electric generation, (3) serve similar customers within their franchise territories (e.g., residential, commercial and industrial customers), (4) use similar electric grids to distribute the energy to their customers, (5) are regulated by the PUC and undergo similar rate-making processes, (6) have similar economic characteristics and (7) perform financial reporting oversight and management of the business at the consolidated level. Bank ASB is a federally chartered savings bank that provides a full range of banking services to individual and business customers through its branch system in Hawaii. ASB is subject to examination and comprehensive regulation by the Office of the Comptroller of the Currency (OCC) and the Federal Deposit Insurance Corporation (FDIC), and is subject to reserve requirements established by the Board of Governors of the Federal Reserve System. Other “Other” includes amounts for the holding companies (HEI and ASB Hawaii), Pacific Current, and other subsidiaries not qualifying as reportable segments, and intercompany eliminations. Pacific Current. Pacific Current was formed in September 2017 to focus on investing in non-regulated renewable energy and sustainable infrastructure in the State of Hawaii to help achieve the state’s sustainability goals. Significant investments of Pacific Current made through its subsidiaries, Hamakua Energy, LLC and Mauo, include: Hamakua power plant . On November 24, 2017, Hamakua Energy, LLC acquired Hamakua Energy Partners, L.P.’s 60-MW combined cycle power plant and other assets from affiliates of ArcLight Capital Partners, a private equity firm. The plant sells all the power it produces to Hawaii Electric Light under an existing power purchase agreement (PPA) that expires in 2030. Solar-plus-storage power purchase agreement . On February 2, 2018, Mauo executed definitive agreements to acquire a solar-plus-storage PPA for a multi-site, commercial-scale project that will provide 8.6 MW of solar capacity and 42.3 megawatthour (MWh) of storage capacity on the islands of Maui and Oahu. The PPA has a 15-year term with a customer option to extend for an additional five years. The system is being constructed by a third party contractor under an Engineering, Procurement and Construction (EPC) contract that was contemporaneously negotiated and executed by Mauo. The EPC contract provides a fixed price for the purchase of the completed system, a project completion schedule and performance obligations designed to match the requirements of the solar-plus-storage PPA. Mauo is funding the construction of the project with a construction facility that will be repaid at the commercial operation date (ultimately with cash from investment tax credits, state renewable tax credits, non-recourse project debt, and equity). Segment financial information was as follows: (in thousands) Electric utility Bank Other Total 2020 Revenues from external customers $ 2,265,281 $ 313,511 $ 983 $ 2,579,775 Intersegment revenues (eliminations) 39 — (39) — Revenues 2,265,320 313,511 944 2,579,775 Depreciation and amortization 256,479 29,349 4,950 290,778 Interest expense, net 67,794 11,114 20,900 99,808 Income (loss) before income taxes 211,753 69,271 (40,400) 240,624 Income taxes (benefit) 40,418 11,688 (11,196) 40,910 Net income (loss) 171,335 57,583 (29,204) 199,714 Preferred stock dividends of subsidiaries 1,995 — (105) 1,890 Net income (loss) for common stock 169,340 57,583 (29,099) 197,824 Capital expenditures 1 350,864 12,203 20,828 383,895 Assets (at December 31, 2020) 6,457,373 8,396,533 150,101 15,004,007 2019 Revenues from external customers $ 2,545,865 $ 327,917 $ 166 $ 2,873,948 Intersegment revenues (eliminations) 77 — (77) — Revenues 2,545,942 327,917 89 2,873,948 Depreciation and amortization 245,362 28,675 4,076 278,113 Interest expense, net 70,842 18,440 20,057 109,339 Income (loss) before income taxes 197,140 112,034 (37,765) 271,409 Income taxes (benefit) 38,305 23,061 (9,729) 51,637 Net income (loss) 158,835 88,973 (28,036) 219,772 Preferred stock dividends of subsidiaries 1,995 — (105) 1,890 Net income (loss) for common stock 156,840 88,973 (27,931) 217,882 Capital expenditures 1 419,898 24,175 13,447 457,520 Assets (at December 31, 2019) 6,388,682 7,233,017 123,552 13,745,251 2018 Revenues from external customers $ 2,546,472 $ 314,275 $ 102 $ 2,860,849 Intersegment revenues (eliminations) 53 — (53) — Revenues 2,546,525 314,275 49 2,860,849 Depreciation and amortization 230,228 21,443 3,958 255,629 Interest expense, net 73,348 15,539 15,329 104,216 Income (loss) before income taxes 180,426 106,578 (32,543) 254,461 Income taxes (benefit) 34,778 24,069 (8,050) 50,797 Net income (loss) 145,648 82,509 (24,493) 203,664 Preferred stock dividends of subsidiaries 1,995 — (105) 1,890 Net income (loss) for common stock 143,653 82,509 (24,388) 201,774 Capital expenditures 1 415,264 72,666 18,840 537,369 Assets (at December 31, 2018) 5,967,503 7,027,894 108,654 13,104,051 1 Contributions in aid of construction balances are included in capital expenditures. Intercompany electricity sales of the Utilities to ASB 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, LLC’s (Hamakua Energy’s) sales to Hawaii Electric Light (a regulated affiliate) are eliminated in consolidation.

Electric utility segment

Electric utility segment	12 Months Ended
	Dec. 31, 2020
Electric utility subsidiary
Electric utility segment	Note 3 · Electric utility segment Regulatory assets and liabilities. Regulatory assets represent deferred costs and accrued decoupling revenues which are expected to be recovered through rates over PUC-authorized periods. Generally, the Utilities do not earn a return on their regulatory assets; however, they have been allowed to recover interest on certain regulatory assets and to include certain regulatory assets in rate base. Regulatory liabilities represent amounts included in rates and collected from ratepayers for costs expected to be incurred in the future, or amounts collected in excess of costs incurred that are refundable to customers. For example, the regulatory liability for cost of removal in excess of salvage value represents amounts that have been collected from ratepayers for costs that are expected to be incurred in the future to retire utility plant. Generally, the Utilities include regulatory liabilities in rate base or are required to apply interest to certain regulatory liabilities. In the table below, noted in parentheses are the original PUC authorized amortization or recovery periods and, if different, the remaining amortization or recovery periods as of December 31, 2020 are noted. Regulatory assets were as follows: December 31 2020 2019 (in thousands) Retirement benefit plans (balance primarily varies with plans’ funded statuses) $ 592,644 $ 554,485 Income taxes (1-55 years) 96,171 102,612 Decoupling revenue balancing account and RAM (1-2 years) 10,432 — Unamortized expense and premiums on retired debt and equity issuances (1-19 years; 1-18 years remaining) 8,654 10,228 Vacation earned, but not yet taken (1 year) 15,665 12,535 COVID-19 related costs (to be determined by PUC) 18,032 — Other (1-39 years remaining) 25,110 35,220 Total regulatory assets $ 766,708 $ 715,080 Included in: Current assets $ 30,435 $ 30,710 Long-term assets 736,273 684,370 Total regulatory assets $ 766,708 $ 715,080 Regulatory liabilities were as follows: December 31 2020 2019 (in thousands) Cost of removal in excess of salvage value (1-79 years) $ 541,730 $ 521,977 Income taxes (1-55 years) 360,426 386,990 Decoupling revenue balancing account and RAM (1-2 years) 1,957 16,370 Retirement benefit plans (balance primarily varies with plans’ funded statuses) 29,759 21,707 Other (1-18 years remaining) 25,914 25,266 Total regulatory liabilities $ 959,786 $ 972,310 Included in: Current liabilities $ 37,301 $ 30,724 Long-term liabilities 922,485 941,586 Total regulatory liabilities $ 959,786 $ 972,310 The regulatory asset and liability relating to retirement benefit plans was recorded as a result of pension and OPEB tracking mechanisms adopted by the PUC in rate case decisions for the Utilities in 2007 (see Note 10). Major customers. The Utilities received 11% ($249 million), 11% ($281 million) and 11% ($273 million) of their operating revenues from the sale of electricity to various federal government agencies in 2020, 2019 and 2018, respectively. Cumulative preferred stock. The following series of cumulative preferred stock are redeemable only at the option of the respective company at the following prices in the event of voluntary liquidation or redemption: December 31, 2020 Voluntary Redemption Series C, D, E, H, J and K (Hawaiian Electric) $ 20 $ 21 I (Hawaiian Electric) 20 20 G (Hawaii Electric Light) 100 100 H (Maui Electric) 100 100 Hawaiian Electric is obligated to make dividend, redemption and liquidation payments on the preferred stock of each of its subsidiaries if the respective subsidiary is unable to make such payments, but this obligation is subordinated to Hawaiian Electric’s obligation to make payments on its own preferred stock. Related-party transactions. HEI charged the Utilities $5.6 million, $6.0 million and $5.9 million for general management and administrative services in 2020, 2019 and 2018, respectively. The amounts charged by HEI to its subsidiaries for services provided by HEI employees are allocated primarily on the basis of time expended in providing such services. For the years ended December 31, 2020 and December 31, 2019, Hamakua Energy, LLC (an indirect subsidiary of HEI) sold energy and capacity to Hawaii Electric Light (subsidiary of Hawaiian Electric and indirect subsidiary of HEI) under a PPA in the amount of $50 million and $68 million, respectively. Hawaiian Electric’s short-term borrowings from HEI totaled nil at December 31, 2020 and 2019. Borrowings among the Utilities are eliminated in consolidation. Interest charged by HEI to Hawaiian Electric was not material for the years ended December 31, 2020 and 2019. Unconsolidated variable interest entities. Power purchase agreements . As of December 31, 2020, the Utilities had four PPAs for firm capacity (excluding the Puna Geothermal Venture (PGV) PPA as PGV had been offline since May 2018 due to lava flow on Hawaii Island, but returned to service at a level providing limited output without firm capacity in the fourth quarter of 2020) 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 are 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 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 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 Hamakua Energy in its consolidated financial statements. Hamakua Energy is an indirect subsidiary of Pacific Current, and is consolidated in HEI’s consolidated financial statements. For the other PPAs with 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 IPP was considered a “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 Consolidated Financial Statements. The consolidation of any significant IPP could have a material effect on the 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. Power purchase agreements . Purchases from all IPPs were as follows: Years ended December 31 2020 2019 2018 (in millions) Kalaeloa $ 149 $ 214 $ 216 AES Hawaii 133 139 140 HPOWER 70 76 69 Hamakua Energy 50 68 56 Puna Geothermal Venture 1 — 15 Wind IPPs 105 95 107 Solar IPPs 57 36 29 Other IPPs 1 4 5 7 Total IPPs $ 569 $ 633 $ 639 1 Includes hydro power and other PPAs As of December 31, 2020, the Utilities had four firm capacity PPAs for a total of 516.5 megawatts (MW) of firm capacity and excludes the PGV facility. The PGV facility with 34.6 MW of firm capacity had been offline since May 2018 due to lava flow on Hawaii Island, but returned to service at a level providing limited output without firm capacity in the fourth quarter of 2020. The PUC allows rate recovery for energy and firm capacity payments to IPPs under these agreements. Assuming that each of the agreements remains in place for its current term (and as amended) and the minimum availability criteria in the PPAs are met, aggregate minimum fixed capacity charges, excluding the PGV facility, are expected to be approximately $93 million in 2021, $72 million in 2022, $30 million each in 2023, 2024 and 2025, and $188 million from 2026 through 2033. In general, the Utilities base their payments under the PPAs upon available capacity and actual energy supplied and they are generally not required to make payments for capacity if the contracted capacity is not available, and payments are reduced, under certain conditions, if available capacity drops below contracted levels. In general, the payment rates for capacity have been predetermined for the terms of the agreements. Energy payments will vary over the terms of the agreements. The Utilities pass on changes in the fuel component of the energy charges to customers through the energy cost adjustment clause (ECRC) in their rate schedules. The Utilities do not operate, or participate in the operation of, any of the facilities that provide power under the agreements. Title to the facilities does not pass to Hawaiian Electric or its subsidiaries upon expiration of the agreements, and the agreements do not contain bargain purchase options for the facilities. Purchase power adjustment clause. The PUC has approved purchased power adjustment clauses (PPACs) for the Utilities. Purchased power capacity, operation and maintenance (O&M) and other non-energy costs previously recovered through base rates are now recovered in the PPACs and, subject to approval by the PUC, such costs resulting from new purchased power agreements can be added to the PPACs outside of a rate case. Purchased energy costs continue to be recovered through the ECRC. 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 continue 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. Hawaiian Electric and Kalaeloa have agreed that neither party will terminate the PPA (which has been subject to automatic extension on a month-to-month basis) prior to April 30, 2021, to allow for 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 ending September 2022, Hawaiian Electric agreed to purchase 180 MW of firm capacity from AES Hawaii. Hawaiian Electric and AES Hawaii have been in dispute over an additional 9 MW of capacity. In February 2018, Hawaiian Electric reached agreement with AES Hawaii on an amendment to the PPA. However, in June 2018, the PUC issued an order suspending review of the amendment pending a State of Hawaii Department of Health (DOH) decision on AES Hawaii’s request for approval of its Emission Reduction Plan and partnership with Hawaiian Electric. If approved by the PUC, the amendment will resolve AES Hawaii’s claims related to the additional capacity. Hu Honua Bioenergy, LLC (Hu Honua). In May 2012, Hawaii Electric Light signed a PPA, which the PUC approved in December 2013, with 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 and litigation delays, which resulted in an amended and restated PPA between Hawaii Electric Light and Hu Honua dated May 9, 2017. In July 2017, the PUC approved the amended and restated PPA, which becomes effective once the PUC’s order is final and non-appealable. In August 2017, the PUC’s approval was appealed by a third party. On May 10, 2019, the Hawaii Supreme Court issued a decision remanding the matter to the PUC for further proceedings consistent with the court’s decision which must include express consideration of greenhouse gas (GHG) emissions that would result from approving the PPA, whether the cost of energy under the PPA is reasonable in light of the potential for GHG emissions, and whether the terms of the PPA are prudent and in the public interest, in light of its potential hidden and long-term consequences. On June 20, 2019, the PUC issued an order reopening the docket for further proceedings, including re-examining all of the issues in the proceedings. On September 29, 2019, the PUC issued an order setting the procedural schedule for the matter and on December 20, 2019, issued an order modifying the procedural schedule. Pre-hearing matters were completed on March 6, 2020. On July 9, 2020, the PUC issued an order denying Hawaii Electric Light’s request to waive the amended and restated PPA from the PUC’s competitive bidding requirements and therefore, dismissed the request for approval of the amended and restated PPA without prejudice to possible participation in any future competitive bidding process. On July 20, 2020, Hu Honua filed a motion for reconsideration of the PUC’s order which was denied by the PUC on September 9, 2020. On September 16, 2020, Hu Honua filed its notice of appeal to the Hawaii Supreme Court of the PUC’s order denying Hu Honua’s motion for reconsideration. Molokai New Energy Partners (MNEP). In July 2018, the PUC approved Maui Electric’s PPA with MNEP to purchase solar energy from a PV plus battery storage project. The 4.88 MW photovoltaic (PV) and 3 MW Battery Energy Storage System project was to deliver no more than 2.64 MW at any time to the Molokai system. On March 25, 2020, MNEP filed a complaint in the United Stated District Court for the District of Hawaii against Maui Electric claiming breach of contract. On June 3, 2020, Maui Electric provided Notice of Default and Termination of the PPA to MNEP terminating the PPA with an effective date of July 10, 2020. Thereafter, MNEP filed an amended Complaint to include claims relating to the termination and Hawaiian Electric filed its Answer to the Amended Complaint on September 11, 2020, disputing the facts presented by MNEP and all claims within the original and amended complaint. 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 or community support 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 achieve future cost savings consistent with a minimum of $246 million in ERP/EAM project-related benefits to be delivered to customers over the system’s 12-year service life. The decision and order (D&O) approved the deferral of certain project costs and allowed the accrual of AFUDC, but limited the AFUDC rate to 1.75%. The ERP/EAM Implementation Project went live in October 2018. Hawaii Electric Light and Hawaiian Electric began to incorporate their portion of the deferred project costs in rate base and started the amortization over a 12-year period in January 2020 and November 2020, respectively. As of December 31, 2020, the total deferred project costs and accrued carrying costs after the project went into service amounted to $58.8 million, which is net of the amortization of $1.3 million at Hawaiian Electric and Hawaii Electric Light. In February 2019, the PUC approved a methodology for passing the future cost saving benefits of the new ERP/EAM system to customers developed by the Utilities in collaboration with the Consumer Advocate. The Utilities filed a benefits clarification document on June 10, 2019, reflecting $150 million in future net O&M expense reductions and cost avoidance, and $96 million in capital cost reductions and tax savings over the 12-year service life. To the extent the reduction in O&M expense relates to amounts reflected in electric rates, the Utilities would reduce future rates for such amounts. In October 2019, the PUC approved the Utilities and the Consumer Advocate’s Stipulated Performance Metrics and Tracking Mechanism. As of December 31, 2020, the Utilities’ regulatory liability was $10.8 million ($6.9 million for Hawaiian Electric, $1.6 million for Hawaii Electric Light and $2.3 million for Maui Electric) for the O&M expense savings included in rates. As part of the settlement agreement approved in the Hawaiian Electric 2020 test year rate case, the regulatory liability for Hawaiian Electric will be amortized over five years, beginning in November 2020, and the O&M benefits for Hawaiian Electric will be considered flowed through to customers. As part of the PBR proceeding, the regulatory liability as of December 31, 2020 for Hawaii Electric Light and Maui Electric will be flowed to customers as part of the customer dividend in the ARA in 2021. At the PUC’s direction, the Utilities have been filing Semi-Annual Enterprise System Benefits (SAESB) reports. The most recent SAESB report was filed on August 31, 2020 for the period January 1 through June 30, 2020. West Loch PV Project. In November 2019, Hawaiian Electric placed into service a 20-MW (ac) utility-owned and operated renewable and dispatchable solar facility on property owned by the Department of the Navy. PUC orders resulted in a project cost cap of $67 million (including a cap of $4.7 million for the in-kind work to be performed in exchange for use of the Navy property) with capital cost recovery approved under MPIR (See “Performance-based regulation framework” section below for MPIR guidelines and cost recovery discussion.) Project costs incurred as of December 31, 2020 amounted to $53.3 million and generated $14.7 million and $14.0 million in federal and state nonrefundable tax credits, respectively. For book and regulatory purposes, the tax credits are being deferred and amortized, starting in 2020, over 25 years and 10 years for federal and state credits, respectively. As part of the approval of the project, a performance guarantee mechanism was established, which calls for the Utilities to provide energy at target annual energy production levels. Production shortfalls are compensated to customers by the amount of shortfall multiplied by the Equivalent Levelized Energy Price (ELEP) based on the revenue requirements of the actual total cost of the project, but not to exceed 9.56 cents/kilowatthours (kWh). Compensations for shortfall are provided to customers as a credit through the PPAC, while production surpluses are refunded to the Utilities up to amount of previously issued underproduction credits. In December 2020, the Utilities accrued $0.6 million in estimated underproduction credits to be returned to customers in 2021 due to not meeting the 2020 annual production target of 46,850 MWh. The 2020 underproduction credit is based on an interim ELEP representing total project costs at December 31, 2020. The credit will be trued up based on a final ELEP based on final project costs. 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 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 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 federal Environmental Protection Agency (EPA) has since identified environmental impacts in the subsurface soil at the Site. In cooperation with the DOH and EPA, Maui Electric further investigated the Site and the Adjacent Parcel to determine the extent of impacts of polychlorinated biphenyls (PCBs), residual fuel oils and other subsurface contaminants. Maui Electric has a reserve balance of $2.7 million as of December 31, 2020, representing the probable and reasonably estimable undiscounted cost for remediation of the Site and the Adjacent Parcel; however, final costs of remediation will depend on the cleanup approach implemented. 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 the costs of investigation and cleanup of PCBs contamination in sediment in the area offshore of the Waiau Power Plant as part of the Pearl Harbor Superfund Site. Hawaiian Electric was also required by the EPA to assess potential sources and extent of PCB contamination onshore at Waiau Power Plant. As of December 31, 2020, the reserve account balance recorded by Hawaiian Electric to address the PCB contamination was $10 million. The reserve balance represents the probable and reasonably estimable undiscounted cost for the onshore and offshore investigation and remediation. The final remediation costs will depend on the actual onshore and offshore cleanup costs. Asset retirement obligations . Asset retirement obligations (AROs) represent legal obligations associated with the retirement of certain tangible long-lived assets, are measured as the present value of the projected costs for the future retirement of specific assets and are recognized in the period in which the liability is incurred if a reasonable estimate of fair value can be made. The Utilities’ recognition of AROs have no impact on their earnings. The cost of the AROs is recovered over the life of the asset through depreciation. AROs recognized by the Utilities relate to legal obligations associated with the retirement of plant and equipment, including removal of asbestos and other hazardous materials. The Utilities recorded AROs related to: 1) the removal of retired generating units, certain types of transformers and underground storage tanks; 2) the abandonment of fuel pipelines, underground injection and supply wells; and 3) the removal of equipment and restoration of leased land used in connection with Utility-owned renewable and dispatchable generation facilities. Changes to the ARO liability included in “Other liabilities” on Hawaiian Electric’s balance sheet were as follows: (in thousands) 2020 2019 Balance, January 1 $ 10,324 $ 8,426 Accretion expense 405 312 Liabilities incurred — 1,594 Liabilities settled (37) (8) Balance, December 31 $ 10,692 $ 10,324 The Utilities have not recorded AROs for assets that are expected to operate indefinitely or where the Utilities cannot estimate a settlement date (or range of potential settlement dates). As such, ARO liabilities are not recorded for certain asset retirement activities, including various Utilities-owned generating facilities and certain electric transmission, distribution and telecommunications assets resulting from easements over property not owned by the Utilities. Regulatory proceedings. Current Decoupling . Decoupling is a regulatory model that is intended to provide the Utilities with financial stability and facilitate meeting the State of Hawaii’s goals to transition to a clean energy economy and achieve an aggressive renewable portfolio standard. The current decoupling mechanism has the following major components: (1) monthly revenue balancing account (RBA) revenues or refunds for the difference between PUC-approved target revenues and recorded adjusted revenues, which delinks revenues from kWh sales, (2) rate adjustment mechanism (RAM) revenues for escalation in certain O&M expenses and rate base changes, (3) MPIR component, (4) performance incentive mechanisms (PIMs), and (5) 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. Performance-based regulation framework. On December 23, 2020, the PUC issued a D&O (PBR D&O) approving a new performance-based regulation framework (PBR Framework). Under the PBR Framework, the Utilities’ current decoupling will continue to be used with modifications, as described below. The existing cost recovery mechanisms will continue as currently implemented (e.g., the Energy Cost Recovery Clause (ECRC), Purchased Power Adjustment Clause (PPAC), Demand Side Management surcharge (DSM), Renewable Energy Infrastructure Program (REIP), Demand Response Adjustment Clause (DRAC), pension and Other Post-Employment Benefits (OPEB) tracking mechanisms). In addition to annual revenues provided by the annual revenue adjustment (ARA), the Utilities may seek relief for extraordinary projects or programs through the Exceptional Project Recovery Mechanism (EPRM) (formerly known as the Major Project Interim Recovery (MPIR) adjustment mechanism) and earn financial rewards for exemplary performance as provided through a portfolio of Performance Incentive Mechanisms (PIMs) and Shared Savings Mechanisms (SSMs). The PBR Framework will incorporate a variety of other performance mechanisms, including Scorecards, Reported Metrics, and an expedited Pilot Process. The PBR Framework also contains a number of safeguards, including a symmetric Earnings Sharing Mechanism (ESM) which protects the Utilities and customers from excessive earnings or losses, as measured by the Utilities’ Return on Equity (ROE) and a Re-Opener mechanism, under which the PUC will open an examination, at its discretion, to determine if adjustments or modifications to specific PBR mechanisms are appropriate. Rate adjustment mechanism . The existing RAM is based on the lesser of: a) an inflationary adjustment for certain O&M expenses and return on investment for certain rate base changes, or b) cumulative annual compounded increase in Gross Domestic Product Price Index applied to annualized target revenues (the RAM Cap). Annualized target revenues may be reset upon the issuance of an interim or final decision and order (D&O) in a rate case. All Utilities were limited to the RAM Cap in 2020. Under the new PBR Framework, the ARA mechanism will replace the RAM, effective on June 1, 2021. The current effective target revenues, which includes the existing RAM, will continue to be in effect for the period from June 1, 2020, through May 31, 2021. Annual revenue adjustment mechanism . The PBR Framework established a five-year multi-year rate period during which there will be no general rate cases. Target revenues will be adjusted according to an index-driven annual revenue adjustment (ARA) based on (i) an inflation factor, (ii) a predetermined X-factor to encompass productivity, which is set at zero, (iii) a Z-factor to account for exceptional circumstances not in the Utilities’ control and (iv) a customer dividend consisting of a negative adjustment of 0.22% compounded annually and a flow through of the “pre-PBR” savings commitment from the management audit recommendations developed in a prior docket. As a result of an Order issued by the PUC pursuant to a motion for partial reconsideration the customer dividend for “pre-PBR” savings commitment portion to be delivered to customers will be at a rate of $6.61 million per year from 2021 to 2025, and the remaining Enterprise Resource Planning system benefits savings of $3.9 million, to be delivered to customers in 2021. The implementation of the ARA is scheduled to occur on June 1, 2021. Earnings sharing mechanism . A symmetrical earnings sharing mechanism (ESM) for actual return on equity outside of a 300 basis points dead band above and below a target ROE of 9.5%, which is the current authorized ROE for the Utilities. There is a 50/50 sharing between customers and Utilities for the for actual earnings falling within 150 basis points outside of the dead band in either direction, and a 90/10 sharing for any further difference. A Re-opener investigation will be triggered if the Utilities credit rating outlook indicates a potential credit downgrade below investment grade status, or if its earned ROE enters the outer most tier of the ESM. Major project interim recovery . On April 27, 2017, the PUC issued an order that provided guidelines for interim recovery of revenues to support major projects placed in service between general rate cases. 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 approved costs of 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 that 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. The 2019 approved MPIR amounts for Schofield Generating Station of $19.8 million (which accrued effective January 1, 2019), included the 2019 return on project amount (based on the 90% cap on cost recovery of the project through any mechanism other than base rates) in rate base, depreciation and incremental O&M expenses, are collected from June 2020 through May 2021. The PUC approved the Utilities’ requests for MPIR recovery of the cost of the Grid Modernization Strategy Phase 1 project and West Loch PV project in March and December 2019, respectively. On June 5, 2020, the Utilities submitted 2020 MPIR amounts totaling $23.6 million for the Schofield Generation Station ($19.2 million), West Loch PV project ($3.8 million) and Grid Modernization Strategy Phase 1 project ($0.6 million for all three utilities) for the accrual of revenues effective January 1, 2020, that included the 2020 return on project amount (based on the capped amount) in rate base, depreciation and incremental O&M expenses, for collection from June 2021 through May 2022. On October 22, 2020, the PUC issued the final D&O in Hawaiian Electric’s 2020 test year rate case approving the parties’ settlement agreement, including the pa

Bank segment (HEI only)

Bank segment (HEI only)	12 Months Ended
	Dec. 31, 2020
Bank Segment Disclosure [Abstract]
Bank segment (HEI only)	Note 4 · Bank segment (HEI only) Selected financial information American Savings Bank, F.S.B. Statements of Income and Comprehensive Income Data Years ended December 31 2020 2019 2018 (in thousands) Interest and dividend income Interest and fees on loans $ 214,134 $ 233,632 $ 220,463 Interest and dividends on investment securities 30,529 32,922 37,762 Total interest and dividend income 244,663 266,554 258,225 Interest expense Interest on deposit liabilities 10,654 16,830 13,991 Interest on other borrowings 460 1,610 1,548 Total interest expense 11,114 18,440 15,539 Net interest income 233,549 248,114 242,686 Provision for credit losses 50,811 23,480 14,745 Net interest income after provision for credit losses 182,738 224,634 227,941 Noninterest income Fees from other financial services 16,447 19,275 18,937 Fee income on deposit liabilities 16,059 20,877 21,311 Fee income on other financial products 6,381 6,507 7,052 Bank-owned life insurance 6,483 7,687 5,057 Mortgage banking income 23,734 4,943 1,493 Gain on sale of real estate — 10,762 — Gain on sale of investment securities, net 9,275 653 — Other income, net (256) 2,074 2,200 Total noninterest income 78,123 72,778 56,050 Noninterest expense Compensation and employee benefits 104,443 103,009 98,387 Occupancy 21,573 21,272 17,073 Data processing 14,769 15,306 14,268 Services 11,121 10,239 10,847 Equipment 9,001 8,760 7,186 Office supplies, printing and postage 4,623 5,512 6,134 Marketing 3,435 4,490 3,567 FDIC insurance 2,342 1,204 2,713 Other expense 1 20,283 15,586 17,238 Total noninterest expense 191,590 185,378 177,413 Income before income taxes 69,271 112,034 106,578 Income taxes 11,688 23,061 24,069 Net income 57,583 88,973 82,509 Other comprehensive income (loss), net of taxes 23,608 29,406 (7,119) Comprehensive income $ 81,191 $ 118,379 $ 75,390 1 2020 includes approximately $5.1 million of certain direct and incremental COVID-19 related costs. For 2020, these costs, which have been recorded in Other expense , include $2.5 million of compensation expense and $2.0 million of enhanced cleaning and sanitation costs. Reconciliation to amounts per HEI Consolidated Statements of Income*: Years ended December 31 2020 2019 2018 (in thousands) Interest and dividend income $ 244,663 $ 266,554 $ 258,225 Noninterest income 78,123 72,778 56,050 Less: Gain on sale of real estate — 10,762 — Less: Gain on sale of investment securities, net 9,275 653 — *Revenues-Bank 313,511 327,917 314,275 Total interest expense 11,114 18,440 15,539 Provision for credit losses 50,811 23,480 14,745 Noninterest expense 191,590 185,378 177,413 Less: Retirement defined benefits expense (credit)—other than service costs 1,813 (472) 1,657 Add: Gain on sale of real estate — 10,762 — *Expenses-Bank 251,702 217,008 206,040 *Operating income-Bank 61,809 110,909 108,235 Add back: Retirement defined benefits expense (credit)—other than service costs 1,813 (472) 1,657 Add back: Gain on sale of investment securities, net 9,275 653 — Income before income taxes $ 69,271 $ 112,034 $ 106,578 Balance Sheets Data December 31 2020 2019 (in thousands) Assets Cash and due from banks $ 178,422 $ 129,770 Interest-bearing deposits 114,304 48,628 Cash and cash equivalents 292,726 178,398 Investment securities Available-for-sale, at fair value 1,970,417 1,232,826 Held-to-maturity, at amortized cost (fair value of $229,963 and $143,467 at December 31, 2020 and 2019, respectively) 226,947 139,451 Stock in Federal Home Loan Bank, at cost 8,680 8,434 Loans held for investment 5,333,843 5,121,176 Allowance for credit losses (101,201) (53,355) Net loans 5,232,642 5,067,821 Loans held for sale, at lower of cost or fair value 28,275 12,286 Other 554,656 511,611 Goodwill 82,190 82,190 Total assets $ 8,396,533 $ 7,233,017 Liabilities and shareholder’s equity Deposit liabilities–noninterest-bearing $ 2,598,500 $ 1,909,682 Deposit liabilities–interest-bearing 4,788,457 4,362,220 Other borrowings 89,670 115,110 Other 183,731 146,954 Total liabilities 7,660,358 6,533,966 Commitments and contingencies Common stock 1 1 Additional paid in capital 351,758 349,453 Retained earnings 369,470 358,259 Accumulated other comprehensive income (loss), net of taxes Net unrealized gains (losses) on securities $ 19,986 $ 2,481 Retirement benefit plans (5,040) 14,946 (11,143) (8,662) Total shareholder’s equity 736,175 699,051 Total liabilities and shareholder’s equity $ 8,396,533 $ 7,233,017 December 31 2020 2019 (in thousands) Other assets Bank-owned life insurance $ 163,265 $ 157,465 Premises and equipment, net 206,134 204,449 Accrued interest receivable 24,616 19,365 Mortgage servicing rights 10,020 9,101 Low-income housing investments 83,435 66,302 Other 67,186 54,929 $ 554,656 $ 511,611 Other liabilities Accrued expenses $ 62,694 $ 45,822 Federal and state income taxes payable 6,582 14,996 Cashier’s checks 38,011 23,647 Advance payments by borrowers 10,207 10,486 Other 66,237 52,003 $ 183,731 $ 146,954 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. Investment securities. The major components of investment securities were as follows: Gross unrealized losses Gross unrealized Gross unrealized Estimated fair value Less than 12 months 12 months or longer (dollars in thousands) Amortized Number of issues Fair value Amount Number of issues Fair value Amount December 31, 2020 Available-for-sale U.S. Treasury and federal agency obligations $ 60,260 $ 2,062 $ — $ 62,322 — $ — $ — — $ — $ — Mortgage-backed securities* 1,825,893 26,817 (3,151) 1,849,559 22 373,924 (3,151) — — — Corporate bonds 29,776 1,575 — 31,351 — — — — — — Mortgage revenue bonds 27,185 — — 27,185 — — — — — — $ 1,943,114 $ 30,454 $ (3,151) $ 1,970,417 22 $ 373,924 $ (3,151) — $ — $ — Held-to-maturity Mortgage-backed securities* $ 226,947 $ 3,846 $ (830) $ 229,963 7 $ 114,152 $ (830) — $ — $ — $ 226,947 $ 3,846 $ (830) $ 229,963 7 $ 114,152 $ (830) — $ — $ — December 31, 2019 Available-for-sale U.S. Treasury and federal agency obligations $ 117,255 $ 652 $ (120) $ 117,787 2 $ 4,110 $ (11) 3 $ 27,637 $ (109) Mortgage-backed securities* 1,024,892 6,000 (4,507) 1,026,385 19 152,071 (819) 75 318,020 (3,688) Corporate bonds 58,694 1,363 — 60,057 — — — — — — Mortgage revenue bonds 28,597 — — 28,597 — — — — — — $ 1,229,438 $ 8,015 $ (4,627) $ 1,232,826 21 $ 156,181 $ (830) 78 $ 345,657 $ (3,797) Held-to-maturity Mortgage-backed securities* $ 139,451 $ 4,087 $ (71) $ 143,467 1 $ 12,986 $ (71) — $ — $ — $ 139,451 $ 4,087 $ (71) $ 143,467 1 $ 12,986 $ (71) — $ — $ — * Issued or guaranteed by U.S. Government agencies or sponsored agencies ASB does not believe that the investment securities that were in an unrealized loss position as of December 31, 2020, represent a credit loss. Total gross unrealized losses were primarily attributable to change in market conditions. On a quarterly basis the investment securities are evaluated for changes in financial condition of the issuer. Based upon ASB’s evaluation, all securities held within the investment portfolio continue to be investment grade by one or more agencies. The contractual cash flows of the U.S. Treasury, federal agency obligations and agency mortgage-backed 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’s investment securities portfolio did not require an allowance for credit losses as of December 31, 2020. U.S. Treasury, federal agency obligations, corporate bonds, and mortgage revenue bonds have contractual terms to maturity. Mortgage-backed 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: Amortized Fair December 31, 2020 Cost value (in thousands) Available-for-sale Due in one year or less $ 16,974 $ 17,098 Due after one year through five years 41,551 43,285 Due after five years through ten years 31,511 33,290 Due after ten years 27,185 27,185 117,221 120,858 Mortgage-backed securities — issued or guaranteed by U.S. Government agencies or sponsored agencies 1,825,893 1,849,559 Total available-for-sale securities $ 1,943,114 $ 1,970,417 Held-to-maturity Mortgage-backed securities — issued or guaranteed by U.S. Government agencies or sponsored agencies $ 226,947 $ 229,963 Total held-to-maturity securities $ 226,947 $ 229,963 The proceeds, gross gains and losses from sales of available-for-sale securities were as follows: Years ended December 31 2020 2019 2018 (in thousands) Proceeds $ 169,157 $ 19,810 $ — Gross gains 9,275 653 — Gross losses — — — Interest income from taxable and non-taxable investment securities were as follows: Years ended December 31 2020 2019 2018 (in thousands) Taxable $ 29,760 $ 31,848 $ 37,153 Non-taxable 769 1,074 609 $ 30,529 $ 32,922 $ 37,762 ASB pledged securities with a market value of approximately $445 million and $546 million as of December 31, 2020 and 2019, respectively, as collateral for public funds and other deposits, mortgage pipeline hedge margin, automated clearinghouse transactions, The Federal Reserve Bank of San Francisco Discount Window and bankruptcy account, and The Federal Home Loan Bank of Des Moines advance line. In addition, ASB pledged securities with a market value of $92 million and $130 million as of December 31, 2020 and 2019, respectively, as collateral for securities sold under agreements to repurchase. Stock in FHLB . As of December 31, 2020 and 2019, ASB’s stock in FHLB was carried at cost ($8.7 million and $8.4 million, respectively) because it can only be redeemed at par and it is a required investment based on measurements of ASB’s capital, assets and borrowing levels. Quarterly and as conditions warrant, ASB reviews its investment in the stock of the FHLB for impairment. ASB evaluated its investment in FHLB stock for credit losses as of December 31, 2020, consistent with its accounting policy. ASB did not recognize any credit losses for 2020, 2019 and 2018 based on its evaluation of the underlying investment. Future deterioration in the FHLB’s financial position and/or negative developments in any of the factors considered in ASB’s impairment evaluation may result in future impairment losses. Loans. The components of loans were summarized as follows: December 31 2020 2019 (in thousands) Real estate: Residential 1-4 family $ 2,144,239 $ 2,178,135 Commercial real estate 983,865 824,830 Home equity line of credit 963,578 1,092,125 Residential land 15,617 14,704 Commercial construction 121,424 70,605 Residential construction 11,022 11,670 Total real estate 4,239,745 4,192,069 Commercial 936,748 670,674 Consumer 168,733 257,921 Total loans 5,345,226 5,120,664 Less: Deferred fees and discounts (11,383) 512 Allowance for credit losses (101,201) (53,355) Total loans, net $ 5,232,642 $ 5,067,821 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 property purchases, the loan-to-value ratio may not exceed 75% of the lower of the appraised value or purchase price at origination. ASB services real estate loans for investors (principal balance of $1.5 billion, $1.3 billion and $1.2 billion as of December 31, 2020, 2019 and 2018, respectively), which are not included in the accompanying balance sheets data. ASB reports fees earned for servicing such loans as income when the related mortgage loan payments are collected and charges loan servicing cost to expense as incurred. As of December 31, 2020 and 2019, ASB had pledged loans with an amortized cost of approximately $3.0 billion and $2.9 billion, respectively, as collateral to secure advances from the FHLB. As of December 31, 2020 and 2019, the aggregate amount of loans to directors and executive officers of ASB and its affiliates and any related interests (as defined in Federal Reserve Board (FRB) Regulation O) of such individuals, was $13.2 million and $24.1 million, respectively. As of December 31, 2020 and 2019, $10.0 million and $18.0 million of the loan balances, respectively, were to related interests of individuals who are directors of ASB. All such loans were made at ASB’s normal credit terms. Allowance for credit losses. As discussed in Note 1, ASB must maintain an allowance for credit losses that is adequate to absorb estimated probable credit losses associated with its loan portfolio. The allowance for credit losses (balances and changes) and financing receivables by portfolio segment were as follows: (in thousands) Residential 1-4 family Commercial Home equity Residential land Commercial construction Residential construction Commercial Consumer Total December 31, 2020 Allowance for credit losses: Beginning balance, prior to adoption of ASU No. 2016-13 $ 2,380 $ 15,053 $ 6,922 $ 449 $ 2,097 $ 3 $ 10,245 $ 16,206 $ 53,355 Impact of adopting ASU No. 2016-13 2,150 208 (541) (64) 289 14 922 16,463 19,441 Charge-offs (7) — (77) (351) — — (5,819) (19,900) (26,154) Recoveries 394 — 63 38 — — 872 3,381 4,748 Net (charge-offs) recoveries 387 — (14) (313) — — (4,947) (16,519) (21,406) Provision (317) 20,346 446 537 1,763 (6) 19,242 7,800 49,811 Ending balance $ 4,600 $ 35,607 $ 6,813 $ 609 $ 4,149 $ 11 $ 25,462 $ 23,950 $ 101,201 Average loans outstanding $ 2,148,848 $ 861,096 $ 1,060,444 $ 13,799 $ 93,740 $ 10,703 $ 935,663 $ 215,994 $ 5,340,287 Net charge-offs (recoveries) to average loans (0.02) % — % — % 2.27 % — % — % 0.53 % 7.65 % 0.40 % December 31, 2019 Allowance for credit losses: Beginning balance $ 1,976 $ 14,505 $ 6,371 $ 479 $ 2,790 $ 4 $ 9,225 $ 16,769 $ 52,119 Charge-offs (26) — (144) (4) — — (6,811) (21,677) (28,662) Recoveries 854 — 17 229 — — 2,351 2,967 6,418 Net (charge-offs) recoveries 828 — (127) 225 — — (4,460) (18,710) (22,244) Provision (424) 548 678 (255) (693) (1) 5,480 18,147 23,480 Ending balance $ 2,380 $ 15,053 $ 6,922 $ 449 $ 2,097 $ 3 $ 10,245 $ 16,206 $ 53,355 Average loans outstanding $ 2,164,759 $ 781,531 $ 1,043,479 $ 14,065 $ 81,937 $ 10,513 $ 620,206 $ 270,340 $ 4,986,830 Net charge-offs (recoveries) to average loans (0.04) % — % 0.01 % (1.60 %) — % — % 0.72 % 6.92 % 0.45 % Ending balance: individually evaluated for impairment $ 898 $ 2 $ 322 $ — $ — $ — $ 1,015 $ 454 $ 2,691 Ending balance: collectively evaluated for impairment $ 1,482 $ 15,051 $ 6,600 $ 449 $ 2,097 $ 3 $ 9,230 $ 15,752 $ 50,664 Financing Receivables: Ending balance $ 2,178,135 $ 824,830 $ 1,092,125 $ 14,704 $ 70,605 $ 11,670 $ 670,674 $ 257,921 $ 5,120,664 Ending balance: individually evaluated for impairment $ 15,600 $ 1,048 $ 12,073 $ 3,091 $ — $ — $ 8,418 $ 507 $ 40,737 Ending balance: collectively evaluated for impairment $ 2,162,535 $ 823,782 $ 1,080,052 $ 11,613 $ 70,605 $ 11,670 $ 662,256 $ 257,414 $ 5,079,927 December 31, 2018 Allowance for credit losses: Beginning balance $ 2,902 $ 15,796 $ 7,522 $ 896 $ 4,671 $ 12 $ 10,851 $ 10,987 $ 53,637 Charge-offs (128) — (353) (18) — — (2,722) (17,296) (20,517) Recoveries 74 — 257 179 — — 2,136 1,608 4,254 Net (charge-offs) recoveries (54) — (96) 161 — — (586) (15,688) (16,263) Provision (872) (1,291) (1,055) (578) (1,881) (8) (1,040) 21,470 14,745 Ending balance $ 1,976 $ 14,505 $ 6,371 $ 479 $ 2,790 $ 4 $ 9,225 $ 16,769 $ 52,119 Average loans outstanding $ 2,105,674 $ 745,186 $ 944,065 $ 14,935 $ 114,969 $ 14,959 $ 579,133 $ 240,414 $ 4,759,335 Net charge-offs (recoveries) to average loans — % — % 0.01 % (1.08 %) — % — % 0.10 % 6.53 % 0.34 % Ending balance: individually evaluated for impairment $ 876 $ 7 $ 701 $ 6 $ — $ — $ 628 $ 4 $ 2,222 Ending balance: collectively evaluated for impairment $ 1,100 $ 14,498 $ 5,670 $ 473 $ 2,790 $ 4 $ 8,597 $ 16,765 $ 49,897 Financing Receivables: Ending balance $ 2,143,397 $ 748,398 $ 978,237 $ 13,138 $ 92,264 $ 14,307 $ 587,891 $ 266,002 $ 4,843,634 Ending balance: individually evaluated for impairment $ 16,494 $ 915 $ 14,800 $ 2,059 $ — $ — $ 5,340 $ 89 $ 39,697 Ending balance: collectively evaluated for impairment $ 2,126,903 $ 747,483 $ 963,437 $ 11,079 $ 92,264 $ 14,307 $ 582,551 $ 265,913 $ 4,803,937 Allowance for loan commitments. The allowance for loan commitments by portfolio segment were as follows: (in thousands) Home equity Commercial construction Commercial loans Total Year ended December 31, 2020 Allowance for loan commitments: Beginning balance, prior to adoption of ASU No. 2016-13 $ 392 $ 931 $ 418 $ 1,741 Impact of adopting ASU No. 2016-13 (92) 1,745 (94) 1,559 Provision — 324 676 1,000 Ending balance $ 300 $ 3,000 $ 1,000 $ 4,300 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 ASB 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 vintage date based on payment activity or internally assigned grade for loans was as follows: Term Loans by Origination Year Revolving Loans (in thousands) 2020 2019 2018 2017 2016 Prior Revolving loans Converted to term loans Total December 31, 2020 Residential 1-4 family Current $ 567,282 $ 218,988 $ 111,243 $ 203,916 $ 184,888 $ 849,788 $ — $ — $ 2,136,105 30-59 days past due — — — — — 2,629 — — 2,629 60-89 days past due — 476 — — — 2,314 — — 2,790 Greater than 89 days past due — — — 353 — 2,362 — — 2,715 567,282 219,464 111,243 204,269 184,888 857,093 — — 2,144,239 Home equity line of credit Current — — — — — — 927,106 33,228 960,334 30-59 days past due — — — — — — 552 298 850 60-89 days past due — — — — — — 267 75 342 Greater than 89 days past due — — — — — — 1,463 589 2,052 — — — — — — 929,388 34,190 963,578 Residential land Current 8,357 3,427 1,598 939 22 272 — — 14,615 30-59 days past due — — — — — 702 — — 702 60-89 days past due — — — — — — — — — Greater than 89 days past due — — — — — 300 — — 300 8,357 3,427 1,598 939 22 1,274 — — 15,617 Residential construction Current 6,919 3,093 385 625 — — — — 11,022 30-59 days past due — — — — — — — — — 60-89 days past due — — — — — — — — — Greater than 89 days past due — — — — — — — — — 6,919 3,093 385 625 — — — — 11,022 Consumer Current 28,818 67,159 37,072 7,207 293 348 18,351 3,758 163,006 30-59 days past due 406 1,085 727 155 4 — 138 90 2,605 60-89 days past due 191 549 427 165 3 — 97 59 1,491 Greater than 89 days past due 131 532 409 119 7 — 262 171 1,631 29,546 69,325 38,635 7,646 307 348 18,848 4,078 168,733 Commercial real estate Pass 270,603 63,301 62,168 28,432 55,089 155,654 11,000 — 646,247 Special Mention 10,261 36,405 57,952 33,763 68,287 48,094 — — 254,762 Substandard — 14,720 4,181 1,892 4,423 57,640 — — 82,856 Doubtful — — — — — — — — — 280,864 114,426 124,301 64,087 127,799 261,388 11,000 — 983,865 Commercial construction Pass 14,480 31,965 26,990 — 5,562 — 22,517 — 101,514 Special Mention 1,910 — — 18,000 — — — — 19,910 Substandard — — — — — — — — — Doubtful — — — — — — — — — 16,390 31,965 26,990 18,000 5,562 — 22,517 — 121,424 Commercial Pass 392,088 117,791 75,533 29,211 12,520 35,770 74,520 11,004 748,437 Special Mention 37,836 23,087 1,920 6,990 30,264 13,250 31,362 11,218 155,927 Substandard 304 7,785 2,043 4,017 7,542 3,113 5,265 1,928 31,997 Doubtful — — — — — — 387 — 387 430,228 148,663 79,496 40,218 50,326 52,133 111,534 24,150 936,748 Total loans $ 1,339,586 $ 590,363 $ 382,648 $ 335,784 $ 368,904 $ 1,172,236 $ 1,093,287 $ 62,418 $ 5,345,226 Revolving loans converted to term loans during 2020 in the commercial, home equity line of credit and consumer portfolios were $14.4 million, $11.3 million and $2.8 million, respectively. The credit risk profile based on payment activity for loans was as follows: (in thousands) 30-59 60-89 Greater Total Current Total Recorded December 31, 2020 Real estate: Residential 1-4 family $ 2,629 $ 2,790 $ 2,715 $ 8,134 $ 2,136,105 $ 2,144,239 $ — Commercial real estate — 488 — 488 983,377 983,865 — Home equity line of credit 850 342 2,052 3,244 960,334 963,578 — Residential land 702 — 300 1,002 14,615 15,617 — Commercial construction — — — — 121,424 121,424 — Residential construction — — — — 11,022 11,022 — Commercial 608 300 132 1,040 935,708 936,748 — Consumer 2,605 1,491 1,631 5,727 163,006 168,733 — Total loans $ 7,394 $ 5,411 $ 6,830 $ 19,635 $ 5,325,591 $ 5,345,226 $ — December 31, 2019 Real estate: Residential 1-4 family $ 2,588 $ 290 $ 1,808 $ 4,686 $ 2,173,449 $ 2,178,135 $ — Commercial real estate — — — — 824,830 824,830 — Home equity line of credit 813 — 2,117 2,930 1,089,195 1,092,125 — Residential land — — 25 25 14,679 14,704 — Commercial construction — — — — 70,605 70,605 — Residential construction — — — — 11,670 11,670 — Commercial 1,077 311 172 1,560 669,114 670,674 — Consumer 4,386 3,257 2,907 10,550 247,371 257,921 — Total loans $ 8,864 $ 3,858 $ 7,029 $ 19,751 $ 5,100,913 $ 5,120,664 $ — The credit risk profile based on nonaccrual loans were as follows: December 31, 2020 December 31, 2019 (in thousands) With a Related Without a Total Total Real estate: Residential 1-4 family $ 8,991 $ 2,835 $ 11,826 $ 11,395 Commercial real estate 15,847 2,875 18,722 195 Home equity line of credit 5,791 1,567 7,358 6,638 Residential land 108 300 408 448 Commercial construction — — — — Residential construction — — — — Commercial 1,819 3,328 5,147 5,947 Consumer 3,935 — 3,935 5,113 Total $ 36,491 $ 10,905 $ 47,396 $ 29,736 The credit risk profile based on loans whose terms have been modified and accruing interest were as follows: (in thousands) December 31, 2020 December 31, 2019 Real estate: Residential 1-4 family $ 7,932 $ 9,869 Commercial real estate 3,281 853 Home equity line of credit 8,148 10,376 Residential land 1,555 2,644 Commercial construction — — Residential construction — — Commercial 6,108 2,614 Consumer 54 57 Total troubled debt restructured loans accruing interest $ 27,078 $ 26,413 ASB did not recognize interest on nonaccrual loans for 2020 and 2019. 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 three 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 interest only or 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. The allowance for credit losses on TDR loans that do not share risk characteristics are individually evaluated based on the present value of expected future cash flows discounted at the loan’s effective original contractual rate or based on the fair value of collateral less cost to sell. The financial impact of the estimated loss 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 credit losses. Loan modifications that occurred during 2020, 2019, and 2018 were as follows: Years ended December 31, 2020 December 31, 2019 (dollars in thousands) Number of contracts Outstanding recorded investment (as of period end) 1 Related allowance (as of period end) Number of contracts Outstanding recorded investment (as of period end) 1 Related allowance (as of period end) Real estate: Residential 1-4 family 1 $ 144 $ 6 11 $ 1,770 $ 190 Commercial real estate 6 20,714 4,439 — — — Home equity line of credit 3 85 11 3 442 73 Residential land 4 668 54 3 1,086 — Commercial construction — — — — — — Residential construction — — — — — — Commercial 54 5,380 869 8 5,523 417 Consumer — — — — — — 68 $ 26,991 $ 5,379 25 $ 8,821 $ 680 Year ended December 31, 2018 (dollars in thousands) Number of contracts Outstanding recorded investment (as of period end) 1 Related allowance (as of period end) Real estate: Residential 1-4 family 3 $ 566 $ 26 Commercial real estate — — — Home equity line of credit 53 6,659 578 Residential land 2 1,338 — Commercial construction — — — Residential construction — — — Commercial 12 2,165 211 Consumer — — — 70 $ 10,728 $ 815 1 The period end balances reflect all paydowns and charge-offs since the modification period. TDRs fully paid off, charged-off, or foreclosed upon by period end are not included. Loans modified in TDRs that experienced a payment default of 90 days or more in 2020, 2019, and 2018 and for which the payment default occurred within one year of the modification, were as follows: Years ended December 31 2020 2019 2018 (dollars in thousands) Number of Recorded Number of Recorded Number of Recorded Troubled debt restructurings that subsequently defaulted Real estate: Residential 1-4 family — $ — — $ — — $ — Commercial real estate — — — — — — Home equity line of credit — — — — 1 81 Residential land — — — — — — Commercial construction — — — — — — Residential construction — — — — — — Commercial — — — — 1 246 Consumer — — — — — — — $ — — $ — 2 $ 327 If a loan modified in a TDR subsequently defaults, 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 December 31, 2020 and 2019. The Coronavirus Aid, Relief, and Economic Security Act (CARES Act) provides that a financial institution may elect to suspend the requirements under GAAP for certain loan modifications that would otherwise be categorized as a TDR and any related impairment for accounting purposes. In response to the COVID-19 pandemic, the Board of Governors of the FRB, the FDIC, the National Credit Union Administration, the OCC, and the Consumer Financial Protection Bureau, in consultation with the state financial regulators (collectively, the “agencies”) issued a joint interagency statement (issued March 22, 2020; revised statement issued April 7, 2020). Some of the provisions applicable to the Company include, but are not limited to accounting for loan modifications, past due reporting and nonaccrual status and charge-offs. Loan modifications that do not meet the conditions of the CARES Act may still qualify as a modification that does not need to be accounted for as a TDR. The agencies confirmed with the FASB staff that short-term modifications made on a good faith basis in response to COVID-19 to borrowers who were current prior to any relief are not TDRs. This includes short-term (e.g., six months) modifications such as payment deferrals, fee waivers, extensions of repayment terms, or insignificant delays in payment. Financial institutions are not expected to designate loans with deferrals granted due to COVID-19 as past due because of the deferral. A loan’s payment date is governed by the due date stipulated in the legal agreement. If a financial institution agrees to a payment deferral, these loans would not be considered past due during the period of the deferral. Lastly, during short-term COVID-19 modifications, these loans generally should not be reported as nonaccrual or as classified. Collateral-dependent loans . A loan is considered collateral-dependent when the borrower is experiencing financial difficulty and repayment of the loan is expected to be provided substantially through the operation or sale of the collateral. Loans considered collateral-dependent were as follows: December 31, 2020 Amortized cost Collateral type (in thousands) Real estate: Residential 1-4 family $ 2,541 Residential real estate property Commercial real estate 2,875 Commercial real estate property Home equity line of credit 1,567 Residential real estate property Residential land 300 Residential real estate property Total real estate 7,283 Commercial 934 Business assets Total $ 8,217 ASB had $3.8 million and $3.5 million of consumer mortgage loans collateralized by residential real estate property that were in the process of foreclosure at December 31, 2020 and 2019, respectively. The credit risk profile by internally assigned grade for loans was as follows: December 31, 2019 (in thousands) Commercial Commercial Commercial Total Grade: Pass $ 756,747 $ 68,316 $ 621,657 $ 1,446,720 Special mention 4,451 — 29,921 34,372 Substandard 63,632 2,289 19,096 85,017 Doubtful — — — — Loss — — — — Total $ 824,830 $ 70,605 $ 670,674 $ 1,566,109 The total carrying amount and the total unpaid principal balance of impaired loans and ASB’s average recorded investment of, and interest income recognized from, impaired loans were as follows: December 31 2019 2019 2018 (in thousands) Recorded Unpaid Related Average Interest Average Interest With no related allowance recorded Real est

Short-term borrowings

Short-term borrowings	12 Months Ended
	Dec. 31, 2020
Short-term Debt [Abstract]
Short-term borrowings	Note 5 · Short-term borrowings Commercial paper and bank term loan. As of December 31, 2020 and 2019, HEI had $65 million and $97 million of commercial paper outstanding, respectively. On April 20, 2020, HEI closed on a $65 million 364-day term loan (HEI term loan) from a syndicate of two banks. The HEI term loan bears interest at a floating rate at HEI’s option of either (i) a rate equal to an alternate base rate as defined in the agreement or (ii) a rate equal to an adjusted London interbank offered rate, as defined in the agreement, plus an applicable margin, and matures on April 19, 2021. The proceeds of the HEI term loan were used to pay down the balance on the HEI Facility, which increased the available borrowing capacity on the HEI Facility by $65 million. The HEI term loan contains provisions requiring the maintenance by HEI of certain financial ratios substantially consistent with those in HEI’s existing, amended and restated revolving unsecured credit agreement. The HEI term loan may be prepaid without penalty at any time, but proceeds from any debt capital market transactions over $50 million must first be applied to pay down the HEI term loan. HEI drew $50 million of unsecured senior notes on December 29, 2020 and used the proceeds to pay down the HEI term loan on December 30, 2020. On January 29, 2021, the remaining HEI term loan balance of $15 million was repaid. The weighted-average interest rate of HEI’s outstanding commercial paper, as of December 31, 2020 and 2019 was 0.8% and 2.3%, respectively. The interest rate of HEI’s term loan, as of December 31, 2020, was 1.9%. As of December 31, 2020 and 2019, Hawaiian Electric had nil and $39 million of commercial paper outstanding, respectively. Additionally, on May 19, 2020, Hawaiian Electric paid off and terminated the $100 million term loan credit agreement dated as of December 23, 2019. In addition, Hawaiian Electric entered into a 364-day, $50 million term loan credit agreement that matures on April 19, 2021. The term loan credit agreement includes substantially the same financial covenant and customary representations and warranties, affirmative and negative covenants, and events of default (the occurrence of which may result in the loan outstanding becoming immediately due and payable) consistent with those in Hawaiian Electric’s existing, amended and restated revolving unsecured credit agreement. The loan may be prepaid without penalty at any time, but must be paid down if Hawaiian Electric receives proceeds from any debt capital market transactions over $75 million. Hawaiian Electric drew the full $50 million on May 19, 2020. On January 15, 2021, Hawaiian Electric paid off the $50 million term loan in conjunction with the terms of the loan credit agreement. The weighted-average interest rate of Hawaiian Electric’s outstanding commercial paper and bank term loan as of December 31, 2020 was 1.9%. As of December 31, 2020 and 2019, HEI had three letters of credit outstanding in the aggregate amount of $6 million, on behalf of Hamakua Energy. 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 Credit Facilities), effective July 3, 2017, to amend and restate their respective previously existing revolving unsecured credit agreements. The $150 million HEI Facility and $200 million Hawaiian Electric Facility both will terminate on June 30, 2022. None of the facilities are collateralized. As of December 31, 2020 and 2019, no amounts were outstanding under the Credit Facilities. Under the Credit Facilities, draws would generally bear interest, based on each company’s respective current long-term credit ratings, at the “Adjusted LIBO Rate,” as defined in the agreement, plus 1.375% and annual fees on undrawn commitments, excluding swingline borrowings, of 20 basis points. The Credit Facilities contain provisions for pricing adjustments in the event of a long-term ratings change based on the respective Credit Facilities’ ratings-based pricing grid, which includes the ratings by Fitch, Moody’s and S&P. Certain modifications were made to incorporate some updated terms and conditions customary for facilities of this type. The Credit Facilities continue to contain customary conditions that must be met in order to draw on them, including compliance with covenants (such as covenants preventing HEI’s/Hawaiian Electric’s subsidiaries from entering into agreements that restrict the ability of the subsidiaries to pay dividends to, or to repay borrowings from, HEI/Hawaiian Electric; and a covenant in Hawaiian Electric’s facility restricting Hawaiian Electric’s ability, as well as the ability of any of its subsidiaries, to guarantee additional indebtedness of the subsidiaries if such additional debt would cause the subsidiary’s “Consolidated Subsidiary Funded Debt to Capitalization Ratio” to exceed 65%). Under the HEI Facility, it is an event of default if HEI fails to maintain an unconsolidated “Capitalization Ratio” (funded debt) of 50% or less or if HEI no longer owns Hawaiian Electric or ASB. Under the Hawaiian Electric Facility, it is an event of default if Hawaiian Electric fails to maintain a “Consolidated Capitalization Ratio” (equity) of at least 35%, or if Hawaiian Electric is no longer owned by HEI. The Credit 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. On April 20, 2020, Hawaiian Electric closed on a $75 million 364-day revolving credit agreement (364-day Revolver) with a syndicate of four banks. Under the 364-day Revolver, draws bear interest at a floating rate at Hawaiian Electric’s option of either (i) a rate equal to an alternate base rate as defined in the agreement or (ii) a rate equal to an adjusted London interbank offered rate, as defined in the agreement, plus an applicable margin, requires annual fees for undrawn amounts, and terminates on April 19, 2021. The 364-day Revolver includes substantially the same financial covenant and customary representations and warranties, affirmative and negative covenants, and events of default (the occurrence of which may result in the loan outstanding becoming immediately due and payable) consistent with those in Hawaiian Electric’s existing, amended and restated revolving unsecured credit agreement. As of December 31, 2020, Hawaiian Electric had no amounts outstanding on this revolving credit agreement.

Long-term debt

Long-term debt	12 Months Ended
	Dec. 31, 2020
Long-term Debt, Unclassified [Abstract]
Long-term debt	Note 6 · Long-term debt December 31 2020 2019 (dollars in thousands) Long-term debt of Utilities, net of unamortized debt issuance costs 1 $ 1,561,302 $ 1,497,667 HEI 5.67% senior notes, due 2021 50,000 50,000 HEI 2.99% term loan, due 2022 150,000 150,000 HEI 3.99% senior notes, due 2023 50,000 50,000 HEI 4.58% senior notes, due 2025 50,000 50,000 HEI 4.72% senior notes, due 2028 100,000 100,000 HEI 2.98% senior notes, due 2030 50,000 — Hamakua Energy 4.02% notes, due 2030, secured by real and personal property of Hamakua Energy, LLC 56,030 59,699 Mauo LIBOR + 1.375% loan, due 2023 2 41,046 9,349 Ka`ie`ie Waho Company, LLC 2.79% non-recourse loan, due 2031 13,000 — Less unamortized debt issuance costs (2,249) (2,350) $ 2,119,129 $ 1,964,365 1 See components of “Total long-term debt” and unamortized debt issuance costs in Hawaiian Electric and subsidiaries’ Consolidated Statements of Capitalization. 2 In December 2020, the loan was amended to extend the final maturity date to March 31, 2023; however, the loan continues to incorporate a paydown of the loan balance to no greater than $7 million or state renewable tax credits not received by January 5, 2022. As of December 31, 2020, the aggregate principal payments required on the Company’s long-term debt for 2021 through 2025 are $55 million in 2021, $241 million in 2022, $162 million in 2023, $6 million in 2024 and $103 million in 2025. As of December 31, 2020, the aggregate payments of principal required on the Utilities’ long-term debt for 2021 through 2025 are nil in 2021, $52 million in 2022, $100 million in 2023, nil in 2024 and $47 million in 2025. The HEI term loans and senior notes contain customary representation and warranties, affirmative and negative covenants and events of default (the occurrence of which may result in some or all of the notes then outstanding becoming immediately due and payable). The HEI term loans and senior notes also contain provisions requiring the maintenance by HEI of certain financial ratios generally consistent with those in HEI’s existing, amended revolving unsecured credit agreement. Upon a change of control or certain dispositions of assets (as defined in the note purchase agreements of the senior notes), HEI is required to offer to prepay the senior notes. The Utilities’ senior notes contain customary representations and warranties, affirmative and negative covenants, and events of default (the occurrence of which may result in some or all of the notes of each and all of the utilities then outstanding becoming immediately due and payable) and provisions requiring the maintenance by Hawaiian Electric, and each of Hawaii Electric Light and Maui Electric, of certain financial ratios generally consistent with those in Hawaiian Electric’s existing, amended revolving unsecured credit agreement. Changes in long-term debt. HEI . On September 11, 2020, HEI executed a $50 million private placement note purchase agreement (HEI Series 2020A) under which HEI has authorized the issue and sale of $50 million of unsecured senior notes. On November 17, 2020, HEI executed a $75 million private placement note purchase agreement (HEI Series 2020B and HEI Series 2020C) under which HEI has authorized the issue and sale of $75 million of unsecured senior notes to be drawn in two tranches. As defined in the note purchase agreements, at its option, HEI can draw the notes on a delayed basis. The following table displays the actual draw date or the required by draw date of the HEI notes. HEI Series 2020A HEI Series 2020B (1) HEI Series 2020B (2) HEI Series 2020C Aggregate principal amount $50 million $46 million $5 million $24 million Fixed coupon interest rate 2.98% 3.15% 3.15% 2.82% Maturity date 12/15/2030 1/28/2031 1/28/2031 4/17/2028 Draw date 12/29/2020 1/28/2021 4/16/2021 4/16/2021 Proceeds from the HEI Series 2020A were used to pay down $50 million on the HEI term loan. Proceeds from the HEI Series 2020B (1) tranche were used to repay the remaining $15 million balance on the HEI term loan, together with interest accrued to the date of prepayment, with the balance used to repay a portion of HEI’s commercial paper outstanding. Proceeds from the HEI Series 2020B (2) and 2020C tranches will be used for general corporate purposes, including the paydown of commercial paper balances. Interest is paid semiannually on June 15th and December 15th. The HEI note purchase agreements contain certain restrictive financial covenants that are substantially the same as the financial covenants contained in HEI’s senior credit facility, as amended. The HEI notes may be prepaid in whole or in part at any time at the prepayment price of the principal amount, together with interest accrued to the date of prepayment plus a “Make-Whole Amount,” as defined in the agreements. Ka‘ie‘ie Waho Company, LLC . On September 28, 2020, Ka‘ie‘ie Waho Company, LLC, a wholly owned indirect subsidiary of HEI, entered into a $13 million non-recourse term loan agreement with Bank of Hawaii. The proceeds of the loan were used to acquire a 6-MW solar photovoltaic facility on Kauai, which serves as collateral for the loan. The loan bears interest at a rate equal to LIBOR, as defined in the agreement, plus 2.00%, swapped to a fixed rate of 2.79% with an interest rate swap, matures September 28, 2031, and requires the maintenance of a minimum debt service coverage ratio equal to at least 1.10 to 1.0. The loan requires quarterly principal and monthly interest payments, which total approximately $0.4 million per quarter. Hawaiian Electric . On May 14, 2020, the Utilities issued, through a private placement pursuant to separate note purchase agreements (NPAs), the following unsecured senior notes bearing taxable interest (May Notes): Series 2020A Series 2020B Series 2020C Aggregate principal amount $80 million $60 million $20 million Fixed coupon interest rate Hawaiian Electric 3.31% 3.31% 3.96% Hawaii Electric Light 3.96% Maui Electric 3.31% 3.96% Maturity date Hawaiian Electric 5/1/2030 5/1/2030 5/1/2050 Hawaii Electric Light 5/1/2050 Maui Electric 5/1/2030 5/1/2050 Principal amount by company: Hawaiian Electric $50 million (Green Bond) $40 million $20 million Hawaii Electric Light $10 million — — Maui Electric $20 million $20 million — The May Notes include substantially the same financial covenants and customary conditions as Hawaiian Electric’s credit agreement. Hawaiian Electric is also a party as guarantor under the NPAs entered into by Hawaii Electric Light and Maui Electric. All of the proceeds of the May Notes were used by Hawaiian Electric, Hawaii Electric Light and Maui Electric to finance their capital expenditures and/or to reimburse funds used for the payment of capital expenditures. The May Notes may be prepaid in whole or in part at any time at the prepayment price of the principal amount, together with interest accrued to the date of prepayment plus a “Make-Whole Amount,” as defined in the agreement. On October 29, 2020, the Utilities executed, through a private placement pursuant to separate NPAs, unsecured senior notes bearing taxable interest (October Notes) as shown in the table below. The October Notes had a delayed draw feature and the Utilities drew down all the proceeds on January 14, 2021. Series 2020B Series 2020C Series 2020D Series 2020E Aggregate principal amount $15 million $40 million $30 million $30 million Fixed coupon interest rate Hawaiian Electric 3.28% 3.51% Hawaii Electric Light 3.28% 3.51% Maui Electric 3.51% Maturity date Hawaiian Electric 12/30/2040 12/30/2050 Hawaii Electric Light 12/30/2040 12/30/2050 Maui Electric 12/30/2050 Principal amount by company: Hawaiian Electric — — $30 million $30 million Hawaii Electric Light $15 million $15 million — — Maui Electric — $25 million — —

Shareholders' equity

Shareholders' equity	12 Months Ended
	Dec. 31, 2020
Equity [Abstract]
Shareholders' equity	Note 7 · Shareholders’ equity Reserved shares. As of December 31, 2020, HEI had reserved a total of 17.4 million shares of common stock for future issuance under the HEI Dividend Reinvestment and Stock Purchase Plan (DRIP), the Hawaiian Electric Industries Retirement Savings Plan (HEIRSP), the HEI 2011 Nonemployee Director Stock Plan, the ASB 401(k) Plan and the 2010 Executive Incentive Plan. Accumulated other comprehensive income/(loss). Changes in the balances of each component of 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 AOCI-Retirement benefit plans Balance, December 31, 2017 $ (14,951) $ — $ (26,990) $ (41,941) $ (1,219) Current period other comprehensive income (loss) and reclassifications, net of taxes (9,472) (436) 1,239 (8,669) 1,318 Balance, December 31, 2018 (24,423) (436) (25,751) (50,610) 99 Current period other comprehensive income (loss) and reclassifications, net of taxes 26,904 (1,177) 4,844 30,571 (1,378) Balance, December 31, 2019 2,481 (1,613) (20,907) (20,039) (1,279) Current period other comprehensive income (loss) and reclassifications, net of taxes 17,505 (1,750) 3,020 18,775 (1,640) Balance, December 31, 2020 $ 19,986 $ (3,363) $ (17,887) $ (1,264) $ (2,919) Reclassifications out of AOCI were as follows: Amount reclassified from AOCI Affected line item in the Statement of Years ended December 31 2020 2019 2018 (in thousands) HEI consolidated Net realized gains on securities included in net income $ (1,638) $ (478) $ — Gain on sale of investment securities, net Retirement benefit plans: Amortization of prior service credit and net losses recognized during the period in net periodic benefit cost 23,689 10,107 21,015 See Note 10 for additional details Impact of D&Os of the PUC included in regulatory assets 39,860 (16,177) 8,325 See Note 10 for additional details Total reclassifications $ 61,911 $ (6,548) $ 29,340 Hawaiian Electric consolidated Retirement benefit plans: Amortization of prior service credit and net losses recognized during the period in net periodic benefit cost $ 21,550 $ 9,550 $ 19,012 See Note 10 for additional details Impact of D&Os of the PUC included in regulatory assets 39,860 (16,177) 8,325 See Note 10 for additional details Total reclassifications $ 61,410 $ (6,627) $ 27,337

Leases

Leases	12 Months Ended
	Dec. 31, 2020
Leases [Abstract]
Leases	Note 8 · Leases The Company adopted ASU No. 2016-02 and related amendments on January 1, 2019, and used the effective date as the date of initial application. The Company elected the practical expedient package under which the Company did not reassess its prior conclusions about whether any expired or existing contracts are or contain leases, whether there is a change in lease classification for any expired or existing leases under the new standard, or whether there were initial direct costs for any existing leases that would be treated differently under the new standard. The Company elected the short-term lease recognition exemption for all of its leases that qualify, and accordingly, does not recognize lease liabilities and ROU assets for all leases that have lease terms that are 12 months or less. The amounts related to short-term leases are not material. The Company elected the practical expedient to not separate lease and non-lease components for its real estate and equipment and fossil fuel and renewable energy PPAs . The Company elected the practical expedient to not assess all existing land easements that were not previously accounted for in accordance with ASC 840. The Company leases certain real estate and equipment for various terms under long-term operating lease agreements. The agreements expire at various dates through 2054 and provide for renewal options up to 10 years. The periods associated with the renewal options are excluded for the purpose of determining the lease term unless the exercise of the renewable option is reasonably certain. In the normal course of business, it is expected that many of these agreements will be replaced by similar agreements. Certain real estate leases require the Company to pay for operating expenses such as common area maintenance, real estate taxes and insurance, which are recognized as variable lease expense when incurred and are not included in the measurement of the lease liability. Additionally, the Utilities contract with independent power producers to supply energy under long-term power purchase agreements. Certain PPAs are treated as operating leases under the new standard because the Company elected the practical expedient package under which prior conclusions about lease identification were not reassessed. The fixed capacity payments under the PPAs are included in the lease liability, while the variable lease payments (e.g., payments based on kWh) are excluded from the lease liability. Several as-available PPAs have variable-only payment terms based on production. For PPAs with no minimum lease payments, the Utilities do not recognize any lease liabilities or ROU assets, and the related costs are reported as variable lease costs. In the fourth quarter of 2020, PGV returned to service at a level providing limited output without firm capacity. Until PGV is fully operational, Hawaii Electric Light is not required to make any fixed capacity payments and is only obligated to make variable lease payments. Therefore, as of December 31, 2020, Hawaii Electric Light did not recognize any lease liability or ROU asset for the PGV PPA. In August 2019, Hawaiian Electric entered into a lease agreement for a total office space of approximately 195,000 square feet in downtown Honolulu to lower costs and bring together office workers currently in separate leased buildings. The lease consists of two different phases with commencement dates of January 2020 and January 2021, respectively, and is an operating lease for a term of 12 years with various options to extend up to 10 years. Annual base rent expense for each phase is approximately $1.9 million and $1.7 million, respectively, and the operating lease liability recorded upon commencement of each phase was $21 million and $19 million, respectively. In addition to the annual base rent payments that are included in the lease liability, there are additional payments for operating expenses, which are recognized as variable lease cost when incurred. These payments are related to operating expenses, such as common area maintenance, various taxes and insurance. Under the terms of the lease, Hawaiian Electric is entitled to receive up to $5.0 million and $4.6 million in reimbursements for various office improvements for each phase, respectively. The amounts are to be included as a reduction to the initial measurement of the ROU asset on each respective commencement date, and will be subsequently adjusted if the actual reimbursements are different from the initial amounts previously recognized. As of December 31, 2020 and 2019, total amount of office improvements to be reimbursed by the lessor for each phase was $2.6 million and nil, respectively. In December 31, 2020, Hawaiian Electric entered into an agreement with an unrelated party to sublease out approximately 64,000 square feet of the downtown Honolulu office space commencing in January 2021. The sublease is an operating lease for six and a half years with an option to extend the term for an additional two years. Estimated base rent revenue is approximately $8.3 million for the entire lease term. In addition to the base rent, Hawaiian Electric will also collect from the sublessee its proportionate share of all operating expenses, utilities, and taxes, which will be recognized as an additional rent revenue. The Utilities’ lease payments for each operating lease agreement were discounted using its estimated unsecured borrowing rates for the appropriate term, reduced for the estimated impact of collateral, which is a reduction of approximately 25 basis points. ASB’s lease payments for each operating lease agreement were discounted using Federal Home Loan Bank of Des Moines (FHLB) fixed rate advance rates, which are collateralized, for the appropriate term. The FHLB is ASB’s primary wholesale funding source and can provide collateralized borrowing rates for various terms starting at overnight borrowings to 30-year borrowing terms. Amounts related to the Company’s total lease cost and cash flows arising from lease transactions are as follows: HEI consolidated Hawaiian Electric consolidated Year ended December 31, 2020 Other leases PPAs classified as leases Total Other leases PPAs classified as leases Total (dollars in thousands) Operating lease cost $ 11,201 $ 63,319 $ 74,520 $ 6,022 $ 63,319 $ 69,341 Variable lease cost 12,765 217,173 229,938 9,842 217,173 227,015 Total lease cost $ 23,966 $ 280,492 $ 304,458 $ 15,864 $ 280,492 $ 296,356 Other information Cash paid for amounts included in the measurement of lease liabilities—Operating cash flows from operating leases $ 10,783 $ 60,801 $ 71,584 $ 6,223 $ 60,801 $ 67,024 Weighted-average remaining lease term—operating leases (in years) 8.9 1.8 4.4 10.1 1.8 3.8 Weighted-average discount rate—operating leases 2.87 % 4.08 % 3.61 % 3.20 % 4.08 % 3.84 % HEI consolidated Hawaiian Electric consolidated Year ended December 31, 2019 Other leases PPAs classified as leases Total Other leases PPAs classified as leases Total (dollars in thousands) Operating lease cost $ 10,265 $ 63,319 $ 73,584 $ 4,955 $ 63,319 $ 68,274 Variable lease cost 13,034 192,138 205,172 10,272 192,138 202,410 Total lease cost $ 23,299 $ 255,457 $ 278,756 $ 15,227 $ 255,457 $ 270,684 Other information Cash paid for amounts included in the measurement of lease liabilities—Operating cash flows from operating leases $ 10,447 $ 62,594 $ 73,041 $ 5,768 $ 62,594 $ 68,362 Weighted-average remaining lease term—operating leases (in years) 6.5 2.8 3.5 4.5 2.8 2.9 Weighted-average discount rate—operating leases 3.50 % 4.08 % 3.96 % 4.11 % 4.08 % 4.08 % The following table summarizes the maturity of our operating lease liabilities as of December 31, 2020: HEI consolidated Hawaiian Electric consolidated (in millions) Other leases PPAs classified as leases Total Other leases PPAs classified as leases Total 2021 $ 11 $ 63 $ 74 $ 6 $ 63 $ 69 2022 9 42 51 4 42 46 2023 8 — 8 4 — 4 2024 7 — 7 3 — 3 2025 5 — 5 3 — 3 Thereafter 27 — 27 19 — 19 Total lease payments 67 105 172 39 105 144 Less: Imputed interest (8) (4) (12) (6) (4) (10) Total present value of lease payments 1 $ 59 $ 101 $ 160 $ 33 $ 101 $ 134 1 The fixed capacity payment related to the existing PPA with PGV, which will expire on December 31, 2027, is not included as a lease liability as of December 31, 2020. While the facility returned to service in the fourth quarter of 2020, it has been operating at a level providing only limited output, which does not provide firm capacity and does not obligate the Utility to make firm capacity payments. The contractual annual capacity payment is approximately $7 million. The lease liability will be remeasured when PGV returns to operating with firm capacity, at which time contractual firm capacity payments are reestablished.

Revenues

Revenues	12 Months Ended
	Dec. 31, 2020
Revenue from Contract with Customer [Abstract]
Revenues	Note 9 · Revenues Revenue from contracts with customers. The revenues subject to Topic 606 include the Utilities’ electric energy sales revenue and the ASB’s transaction fees, as further described below. Electric Utilities . Electric energy sales . Electric energy sales represent revenues from the generation and transmission of electricity to customers under tariffs approved by the PUC. 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. As electric bills to customers reflect the amount that corresponds directly with the value of the Utilities’ performance to date, the Utilities have elected to use the right to invoice practical expedient, which entitles them to recognize revenue in the amount they have the right to invoice. The Utilities’ revenues include amounts for recovery of various Hawaii state revenue taxes. Revenue taxes are generally recorded as an expense in the year the related revenues are recognized. For 2020, 2019 and 2018, the Utilities’ revenues include recovery of revenue taxes of approximately $202 million, $226 million and $226 million, respectively, which amounts are in “Taxes, other than income taxes” expense. However, the Utilities pay revenue taxes to the taxing authorities 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. As of December 31, 2020 and 2019, the Utilities had recorded $111 million and $132 million, respectively, in “Taxes accrued, including revenue taxes” on the Utilities’ consolidated balance sheet for amounts previously collected from customers or accrued for public service company taxes and PUC fees, net of amounts paid to the taxing authorities. Such amounts will be used to pay public service company taxes and PUC fees owed for the following year. 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. 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 and Comprehensive Income Data (in Revenues—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. ASB also offers a fee-based, managed account product in which income is based on a percentage of assets under management. Other Segment . Other sales. Other sales primarily consist of revenues from the generation and sale of renewable energy at fixed contractual prices per kWh to customers under power purchase agreements by Pacific Current subsidiaries. The performance obligation is satisfied over time as renewable energy is generated and control is transferred to the customer that simultaneously receives and consumes the benefits provided. Payments from customers are generally due within 30 days from the end of the billing period. The bill to customers reflect the amount that corresponds directly with the value of performance to date. Pacific Current has elected to use the right to invoice practical expedient, which entitles it to recognize revenue in the amount they have the right to invoice. 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 the decoupling mechanism, cost recovery surcharges and the 2017 Tax Cuts and Jobs Acts (the Tax Act) adjustments. Decoupling mechanism - Under the current decoupling mechanism, the Utilities are allowed to recover or obligated to refund the difference between actual revenue and the target revenue as determined by the PUC, collect revenue adjustment mechanism and major project interim recovery revenues, and recover or refund performance incentive mechanism penalties or rewards. These adjustments will be reflected in tariffs in future periods. Under the decoupling tariff approved in 2011, the prior year accrued RBA revenues and the annual RAM amount are billed from June 1 of each year through May 31 of the following year, which is within 24 months following the end of the year in which they are recorded as required by the accounting standard for alternative revenue programs (see “Regulatory proceedings” in Note 3). 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 surcharge mechanisms approved by the PUC. These will be reflected in tariffs in future periods (e.g., ECRC 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. Also, see Notes 1, 3 and 12 of the Consolidated Financial Statements. The Utilities have elected to present these revenue adjustments on a gross basis, which results in the amounts being billed to customers presented in revenues from contracts with customers and the amortization of the related regulatory asset/liability as revenues from other sources. Depending on whether the previous deferral balance being amortized was a regulatory asset or regulatory liability, and depending on the size and direction of the current year deferral of surcharges and/or refunds to customers, it could result in negative regulatory revenue during the year. Utility pole attachment fees . These fees primarily represent revenues from third-party companies for their access to and shared use of Utilities-owned poles through licensing agreements. As the shared portion of the utility pole is functionally dependent on the rest of the structure, no distinct goods appear to exist. Therefore, these fees are not subject to the scope of Topic 606, but recognized in accordance with ASC Topic 610, Other Income . Bank . Interest and dividend income . Interest and fees on loans are recognized in accordance with ASC Topic 310, Receivables , including the related allowance for credit 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 of the Consolidated Financial Statements. 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 disaggregate revenues by major source, timing of revenue recognition, and segment: Year ended December 31, 2020 Year ended December 31, 2019 (in thousands) Electric utility Bank Other Total Electric utility Bank Other Total Revenues from contracts with customers Electric energy sales - residential $ 766,609 $ — $ — $ 766,609 $ 807,652 $ — $ — $ 807,652 Electric energy sales - commercial 703,516 — — 703,516 846,110 — — 846,110 Electric energy sales - large light and power 751,464 — — 751,464 905,308 — — 905,308 Electric energy sales - other 8,054 — — 8,054 16,296 — — 16,296 Bank fees — 38,887 — 38,887 — 46,659 — 46,659 Other sales — — 921 921 — — — — Total revenues from contracts with customers 2,229,643 38,887 921 2,269,451 2,575,366 46,659 — 2,622,025 Revenues from other sources Regulatory revenue 11,869 — — 11,869 (54,101) — — (54,101) Bank interest and dividend income — 244,663 — 244,663 — 266,554 — 266,554 Other bank noninterest income — 29,961 — 29,961 — 14,704 — 14,704 Other 23,808 — 23 23,831 24,677 — 89 24,766 Total revenues from other sources 35,677 274,624 23 310,324 (29,424) 281,258 89 251,923 Total revenues $ 2,265,320 $ 313,511 $ 944 $ 2,579,775 $ 2,545,942 $ 327,917 $ 89 $ 2,873,948 Timing of revenue recognition Services/goods transferred at a point in time $ — $ 38,887 $ — $ 38,887 $ — $ 46,659 $ — $ 46,659 Services/goods transferred over time 2,229,643 — 921 2,230,564 2,575,366 — — 2,575,366 Total revenues from contracts with customers $ 2,229,643 $ 38,887 $ 921 $ 2,269,451 $ 2,575,366 $ 46,659 $ — $ 2,622,025 There are no material contract assets or liabilities associated with revenues from contracts with customers existing at December 31, 2020 and 2019. 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 consolidated balance sheets and customer accounts receivable, net and accrued unbilled revenues, net on Hawaiian Electric’s consolidated balance sheets. As of December 31, 2020, 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 ASB, fees are recognized when a transaction is completed.

Retirement benefits

Retirement benefits	12 Months Ended
	Dec. 31, 2020
Retirement Benefits [Abstract]
Retirement benefits	Note 10 · Retirement benefits Defined benefit plans. Substantially all of the employees of HEI and the Utilities participate in the Retirement Plan for Employees of Hawaiian Electric Industries, Inc. and Participating Subsidiaries (HEI Pension Plan). Substantially all of the employees of ASB participated in the American Savings Bank Retirement Plan (ASB Pension Plan) until it was frozen on December 31, 2007. The HEI Pension Plan and the ASB Pension Plan (collectively, the Plans) are qualified, noncontributory defined benefit pension plans and include, in the case of the HEI Pension Plan, benefits for utility union employees determined in accordance with the terms of the collective bargaining agreements between the Utilities and the union. The Plans are subject to the provisions of ERISA. In addition, some current and former executives and directors of HEI and its subsidiaries participate in noncontributory, nonqualified plans (collectively, Supplemental Plans). In general, benefits are based on the employees’ or directors’ years of service and compensation. The continuation of the Plans and the Supplemental Plans and the payment of any contribution thereunder are not assumed as contractual obligations by the participating employers. The Supplemental Plan for directors has been frozen since 1996. The ASB Pension Plan was frozen as of December 31, 2007. The HEI Supplemental Executive Retirement Plan and ASB Supplemental Executive Retirement, Disability, and Death Benefit Plan (noncontributory, nonqualified, defined benefit plans) were frozen as of December 31, 2008. No participants have accrued any benefits under these plans after the respective plan’s freeze and the plans will be terminated at the time all remaining benefits have been paid. Each participating employer reserves the right to terminate its participation in the applicable plans at any time, and HEI and ASB reserve the right to terminate their respective plans at any time. If a participating employer terminates its participation in the Plans, the interest of each affected participant would become 100% vested to the extent funded. Upon the termination of the Plans, assets would be distributed to affected participants in accordance with the applicable allocation provisions of ERISA and any excess assets that exist would be paid to the participating employers. Participants’ benefits in the Plans are covered up to certain limits under insurance provided by the Pension Benefit Guaranty Corporation. Postretirement benefits other than pensions. HEI and the Utilities provide eligible employees health and life insurance benefits upon retirement under the Postretirement Welfare Benefits Plan for Employees of Hawaiian Electric Company, Inc. and participating employers (Hawaiian Electric Benefits Plan). Eligibility of employees and dependents is based on eligibility to retire at termination, the retirement date and the date of hire. The plan was amended in 2011, changing eligibility for certain bargaining unit employees hired prior to May 1, 2011, based on new minimum age and service requirements effective January 1, 2012, per the collective bargaining agreement, and certain management employees hired prior to May 1, 2011 based on new eligibility minimum age and service requirements effective January 1, 2012. The minimum age and service requirements for management and bargaining unit employees hired May 1, 2011 and thereafter have increased and their dependents are not eligible to receive postretirement benefits. Employees may be eligible to receive benefits from the HEI Pension Plan but may not be eligible for postretirement welfare benefits if the different eligibility requirements are not met. The executive death benefit plan was frozen on September 10, 2009 for participants at benefit levels as of that date. The Company’s and Utilities’ cost for OPEB has been adjusted to reflect the plan amendments, which reduced benefits and created prior service credits to be amortized over average future service of affected participants. The amortization of the prior service credit will reduce benefit costs until the various credit bases are fully recognized. Each participating employer reserves the right to terminate its participation in the Hawaiian Electric Benefits Plan at any time. Balance sheet recognition of the funded status of retirement plans. Employers must recognize on their balance sheets the funded status of defined benefit pension and other postretirement benefit plans with an offset to AOCI in shareholders’ equity (using the projected benefit obligation (PBO) and accumulated postretirement benefit obligation (APBO), to calculate the funded status). The PUC allowed the Utilities to adopt pension and OPEB tracking mechanisms in previous rate cases. The amount of the net periodic pension cost (NPPC) and net periodic benefits costs (NPBC) to be recovered in rates is established by the PUC in each rate case. Under the Utilities’ tracking mechanisms, any actual costs determined in accordance with GAAP that are over/under amounts allowed in rates are charged/credited to a regulatory asset/liability. The regulatory asset/liability for each utility will then be amortized over 5 years beginning with the respective utility’s next rate case. Accordingly, all retirement benefit expenses (except for executive life and nonqualified pension plan expenses, which amounted to $1.1 million in 2020 and 2019) determined in accordance with GAAP will be recovered. Under the tracking mechanisms, amounts that would otherwise be recorded in AOCI (excluding amounts for executive life and nonqualified pension plans), net of taxes, as well as other pension and OPEB charges, are allowed to be reclassified as a regulatory asset, as those costs will be recovered in rates through the NPPC and NPBC in the future. The Utilities have reclassified to a regulatory asset/(liability) charges for retirement benefits that would otherwise be recorded in AOCI (amounting to the elimination of a potential adjustment to AOCI of $53.7 million pretax and $(21.8) million pretax for 2020 and 2019, respectively). Under the pension tracking mechanism, the Utilities are required to make contributions to the pension trust in the amount of the actuarially calculated NPPC, except when limited by the ERISA minimum contribution requirements or the maximum contributions imposed by the Internal Revenue Code. Contributions in excess of the calculated NPPC are recorded in a separate regulatory asset. The OPEB tracking mechanisms generally require the Utilities to make contributions to the OPEB trust in the amount of the actuarially calculated NPBC, (excluding amounts for executive life), except when limited by material, adverse consequences imposed by federal regulations. Future decisions in rate cases could further impact funding amounts. Defined benefit pension and other postretirement benefit plans information. The changes in the obligations and assets of the Company’s and Utilities’ retirement benefit plans and the changes in AOCI (gross) for 2020 and 2019 and the funded status of these plans and amounts related to these plans reflected in the Company’s and Utilities’ consolidated balance sheets as of December 31, 2020 and 2019 were as follows: 2020 2019 (in thousands) Pension Other Pension Other HEI consolidated Benefit obligation, January 1 $ 2,278,283 $ 215,639 $ 1,991,384 $ 188,666 Service cost 73,387 2,537 62,135 2,209 Interest cost 81,335 7,407 84,267 8,004 Actuarial losses 275,973 9,785 224,421 25,998 Participants contributions — 2,768 — 2,351 Benefits paid and expenses (84,448) (11,715) (83,924) (11,589) Benefit obligation, December 31 2,624,530 226,421 2,278,283 215,639 Fair value of plan assets, January 1 1,799,200 200,831 1,479,067 173,693 Actual return on plan assets 302,566 27,678 354,072 35,525 Employer contributions 70,844 — 48,629 — Participants contributions — 2,768 — 2,351 Benefits paid and expenses (83,119) (11,404) (82,568) (10,738) Fair value of plan assets, December 31 2,089,491 219,873 1,799,200 200,831 Accrued benefit asset (liability), December 31 $ (535,039) $ (6,548) $ (479,083) $ (14,808) Other assets $ 25,851 $ — $ 19,396 $ — Defined benefit pension and other postretirement benefit plans liability (560,890) (6,548) (498,479) (14,808) Accrued benefit asset (liability), December 31 $ (535,039) $ (6,548) $ (479,083) $ (14,808) AOCI debit, January 1 (excluding impact of PUC D&Os) $ 503,821 $ 6,610 $ 536,920 $ 1,962 Recognized during year – prior service credit (cost) (8) 1,761 42 1,806 Recognized during year – net actuarial (losses) gains (33,456) (208) (15,479) 13 Occurring during year – net actuarial losses (gains) 87,207 (5,768) (17,662) 2,829 AOCI debit before cumulative impact of PUC D&Os, December 31 557,564 2,395 503,821 6,610 Cumulative impact of PUC D&Os (534,594) (1,177) (474,628) (7,458) AOCI debit/(credit), December 31 $ 22,970 $ 1,218 $ 29,193 $ (848) Net actuarial loss $ 557,564 $ 5,731 $ 503,813 $ 11,707 Prior service cost (gain) — (3,336) 8 (5,097) AOCI debit before cumulative impact of PUC D&Os, December 31 557,564 2,395 503,821 6,610 Cumulative impact of PUC D&Os (534,594) (1,177) (474,628) (7,458) AOCI debit/(credit), December 31 22,970 1,218 29,193 (848) Income taxes (benefits) (5,988) (313) (7,677) 219 AOCI debit/(credit), net of taxes (benefits), December 31 $ 16,982 $ 905 $ 21,516 $ (629) As of December 31, 2020 and 2019, the other postretirement benefit plans shown in the table above had APBOs in excess of plan assets. 2020 2019 (in thousands) Pension Other Pension Other Hawaiian Electric consolidated Benefit obligation, January 1 $ 2,110,904 $ 207,073 $ 1,837,653 $ 181,162 Service cost 71,604 2,515 60,461 2,191 Interest cost 75,484 7,103 77,851 7,673 Actuarial losses 260,102 9,151 212,310 25,123 Participants contributions — 2,717 — 2,311 Benefits paid and expenses (77,336) (11,485) (77,060) (11,382) Transfers — — (311) (5) Benefit obligation, December 31 2,440,758 217,074 2,110,904 207,073 Fair value of plan assets, January 1 1,640,417 197,564 1,343,113 170,862 Actual return on plan assets 276,453 27,207 326,204 34,928 Employer contributions 69,720 — 47,808 — Participants contributions — 2,717 — 2,311 Benefits paid and expenses (76,860) (11,173) (76,581) (10,532) Other — — (127) (5) Fair value of plan assets, December 31 1,909,730 216,315 1,640,417 197,564 Accrued benefit liability, December 31 $ (531,028) $ (759) $ (470,487) $ (9,509) Other liabilities (short-term) (535) (720) (518) (715) Defined benefit pension and other postretirement benefit plans liability (530,493) (39) (469,969) (8,794) Accrued benefit liability, December 31 $ (531,028) $ (759) $ (470,487) $ (9,509) AOCI debit, January 1 (excluding impact of PUC D&Os) $ 478,078 $ 5,730 $ 502,189 $ 1,551 Recognized during year – prior service credit (cost) (9) 1,758 (7) 1,803 Recognized during year – net actuarial losses (30,566) (207) (14,658) — Occurring during year – net actuarial losses (gains) 91,018 (6,100) (9,446) 2,376 AOCI debit before cumulative impact of PUC D&Os, December 31 538,521 1,181 478,078 5,730 Cumulative impact of PUC D&Os (534,594) (1,177) (474,628) (7,458) AOCI debit/(credit), December 31 $ 3,927 $ 4 $ 3,450 $ (1,728) Net actuarial loss $ 538,521 $ 4,508 $ 478,069 $ 10,815 Prior service cost (gain) — (3,327) 9 (5,085) AOCI debit before cumulative impact of PUC D&Os, December 31 538,521 1,181 478,078 5,730 Cumulative impact of PUC D&Os (534,594) (1,177) (474,628) (7,458) AOCI debit/(credit), December 31 3,927 4 3,450 (1,728) Income taxes (benefits) (1,011) (1) (888) 445 AOCI debit/(credit), net of taxes (benefits), December 31 $ 2,916 $ 3 $ 2,562 $ (1,283) As of December 31, 2020 and 2019, the other postretirement benefit plan shown in the table above had APBOs in excess of plan assets. Pension benefits . In 2020, investment returns were higher than assumed rates and together with updates to mortality assumptions projected generationally, improved the funded position. Actuarial losses due to demographic experience, including assumption changes, the most significant of which was the decrease in the discount rate used to measure PBO compared to the prior year, partially offset the improvement in funded position. In 2019, investment returns were higher than assumed rates and together with updates to mortality assumptions projected generationally, improved the funded position. Actuarial losses due to demographic experience, including assumption changes, the most significant of which was the decrease in the discount rate used to measure PBO compared to the prior year, partially offset the improvement in funded position. Other benefits . In 2020, investment returns were higher than assumed rates and together with updates to the per capita claims cost to reflect 2021 premiums, improved funded position and offset the actuarial losses due to demographic experience, including assumption changes, the most significant of which was the decrease in the discount rate used to measure APBO. In 2019, investment returns were higher than assumed rates, which improved funded position and predominately offset the actuarial losses due to demographic experience, including assumption changes, the most significant of which was the decrease in the discount rate used to measure APBO. Updates to the per capita claims costs also contributed to a deterioration in the funded position. The dates used to determine retirement benefit measurements for the defined benefit plans and OPEB were December 31 of 2020, 2019 and 2018. For purposes of calculating NPPC and NPBC for all plan assets, the Company and the Utilities have determined the market-related value of retirement benefit plan assets, primarily equity securities and fixed income securities, by calculating the difference between the expected return and the actual return on the fair value of the plan assets, then amortizing the difference over future years – 0% in the first year and 25% in each of years two through five – and finally adding or subtracting the unamortized differences for the past four years from fair value. The method includes a 15% range restriction around the fair value of such assets (i.e., 85% to 115% of fair value). Effective January 1, 2021, the Company adopted a change in accounting principle for the plans’ fixed income securities from a calculated market-related value method to the fair value method in the calculation of the expected return on plan assets component of NPPC and NPBC. The remaining plan assets will continue to use the calculated market-related value methodology. The Company considers the fair value approach to be preferable for its fixed-income portfolio because it results in a current reflection of changes in the value of plan assets in a way similar to the obligations it is intended to hedge. The Company evaluated the effect of this change in accounting principle and deemed it to be immaterial to the historical and current financial statements of the Company and Hawaiian Electric and, therefore, does not plan to account for the change retrospectively and will instead record the cumulative effects from the change in accounting principle in earnings for non-Utility businesses in its 2021 financial statements. Amounts related to the Utilities will be reflected as adjustments to regulatory assets as appropriate, consistent with the expected regulatory treatment. A primary goal of the plans is to achieve long-term asset growth sufficient to pay future benefit obligations at a reasonable level of risk. The investment policy target for defined benefit pension and OPEB plans reflects the philosophy that long-term growth can best be achieved by prudent investments in equity securities while balancing overall fund and pension liability volatility by an appropriate allocation to fixed income securities. In order to reduce the level of portfolio risk and volatility in returns, efforts have been made to diversify the plans’ investments by asset class, geographic region, market capitalization and investment style. The asset allocation of defined benefit retirement plans to equity and fixed income securities (excluding cash) and related investment policy targets and ranges were as follows: Pension benefits 1 Other benefits 2 Investment policy Investment policy December 31 2020 2019 Target Range 2020 2019 Target Range Assets held by category Equity securities 72 % 71 % 70 % 65-75 73 % 71 % 70 % 65-75 Fixed income securities 28 29 30 25-35 27 29 30 25-35 100 % 100 % 100 % 100 % 100 % 100 % 1 Asset allocation (excluding cash) is applicable to only HEI and the Utilities. As of December 31, 2020 and 2019, nearly all of ASB’s pension assets were invested in fixed income securities. 2 Asset allocation (excluding cash) is applicable to only HEI and the Utilities. ASB does not fund its other benefits. Assets held in various trusts for the retirement benefit plans are measured at fair value on a recurring basis and were as follows: Pension benefits Other benefits Fair value measurements using Fair value measurements using (in millions) December 31 Quoted prices in active markets for identical assets Significant other observable inputs Significant unobservable inputs December 31 Level 1 Level 2 Level 3 2020 Equity securities $ 540 $ 540 $ — $ — $ 68 $ 68 $ — $ — Equity index and exchange-traded funds 734 734 — — 77 77 — — Equity investments at net asset value (NAV) 102 — — — 13 — — — Total equity investments 1,376 1,274 — — 158 145 — — Fixed income securities and public mutual funds 363 105 258 — 53 51 2 — Fixed income investments at NAV 278 — — — 5 — — — Total fixed income investments 641 105 258 — 58 51 2 — Cash equivalents, fund and at NAV 68 25 — — 4 3 — — Total 2,085 $ 1,404 $ 258 $ — 220 $ 199 $ 2 $ — Cash, receivables and payables, net 4 — Fair value of plan assets $ 2,089 $ 220 2019 Equity securities $ 470 $ 470 $ — $ — $ 61 $ 61 $ — $ — Equity index and exchange-traded funds 610 610 — — 69 69 — — Equity investments at NAV 78 — — — 11 — — — Total equity investments 1,158 1,080 — — 141 130 — — Fixed income securities and public mutual funds 353 123 230 — 52 49 2 — Fixed income investments at NAV 245 — — — 4 — — — Total fixed income investments 598 123 230 — 56 49 2 — Cash equivalents at NAV 39 — — — 4 — — — Total 1,795 $ 1,203 $ 230 $ — 201 $ 179 $ 2 $ — Cash, receivables and payables, net 4 — Fair value of plan assets $ 1,799 $ 201 Pension benefits Other benefits Measured at net asset value December 31 Redemption frequency Redemption notice period December 31 Redemption frequency Redemption notice period (in millions) 2020 Non U.S. equity funds (a) $ 102 Daily-Monthly 5-30 days $ 13 Daily-Monthly 5-30 days Fixed income investments (b) 278 Monthly 15 days 5 Monthly 15 days Cash equivalents (c) 43 Daily 0-1 day 1 Daily 0-1 day $ 423 $ 19 2019 Non U.S. equity funds (a) $ 78 Daily-Monthly 5-30 days $ 11 Daily-Monthly 5-30 days Fixed income investments (b) 245 Monthly 15 days 4 Monthly 15 days Cash equivalents (c) 39 Daily 0-1 day 4 Daily 0-1 day $ 362 $ 19 None of the investments presented in the tables above have unfunded commitments. (a) Represents investments in funds that primarily invest in non-U.S., emerging markets equities. Redemption frequency for pension benefits assets as of December 31, 2020 were: daily, 62% and monthly, 38%, and as of December 31, 2019 were daily, 60% and monthly, 40%. Redemption frequency for other benefits assets as of December 31, 2020 were: daily, 58% and monthly, 42% and as of December 31, 2019 were: daily, 59% and monthly, 41%. (b) Represents investments in fixed income securities invested in a US-dollar denominated fund that seeks to exceed the Barclays Capital Long Corporate A or better Index through investments in US-dollar denominated fixed income securities and commingled vehicles. (c) Represents investments in cash equivalent funds. This class includes funds that invest primarily in securities issued or guaranteed by the U.S. government or its agencies or instrumentalities. For pension benefits, the fund may also invest in fixed income securities of investment grade issuers. The fair values of the investments shown in the table above represent the Company’s best estimates of the amounts that would be received upon sale of those assets in an orderly transaction between market participants at that date. Those fair value measurements maximize the use of observable inputs. However, in situations where there is little, if any, market activity for the asset at the measurement date, the fair value measurement reflects the Company’s judgments about the assumptions that market participants would use in pricing the asset. Those judgments are developed by the Company based on the best information available in the circumstances. The fair value of investments measured at net asset value presented in the tables above are intended to permit reconciliation to the fair value of plan assets amounts. The Company used the following valuation methodologies for assets measured at fair value. There have been no changes in the methodologies used at December 31, 2020 and 2019. Equity securities, equity index and exchange-traded funds, U.S. Treasury fixed income securities and public mutual funds (Level 1) . Equity securities, equity index and exchange-traded funds, U.S. Treasury fixed income securities and public mutual funds are valued at the closing price reported on the active market on which the individual securities or funds are traded. Fixed income securities (Level 2) . Fixed income securities, other than those issued by the U.S. Treasury, are valued based on yields currently available on comparable securities of issuers with similar credit ratings. The following weighted-average assumptions were used in the accounting for the plans: Pension benefits Other benefits December 31 2020 2019 2018 2020 2019 2018 Benefit obligation Discount rate 1 2.92 % 3.61 % 4.31 % 2.83 % 3.52 % 4.34 % Rate of compensation increase 3.5 3.5 3.5 NA NA NA Net periodic pension/benefit cost (years ended) Discount rate 2 3.61 4.31 3.74 3.52 4.34 3.72 Expected return on plan assets 3 7.25 7.25 7.50 7.25 7.25 7.50 Rate of compensation increase 4 3.5 3.5 3.5 NA NA NA NA Not applicable 1 HEI and the Utilities pension benefits discount rate only at December 31, 2020 and 2019. ASB’s pension benefits discount rate at December 31, 2020 and 2019 was 2.76% and 3.49%, respectively. All other disclosed rates apply to the Company and the Utilities. 2 ASB’s pension benefits discount rate for the year ended December 31, 2020 was 3.49%. All other disclosed rates apply to the Company and the Utilities. 3 HEI’s and Utilities’ plan assets only. For 2020, 2019 and 2018, ASB’s expected return on plan assets was 3.69%, 4.51% and 3.94%, respectively. 4 The Company and the Utilities use a graded rate of compensation increase assumption based on age. The rate provided above is an average across all future years of service for the current population. The Company and the Utilities based their selection of an assumed discount rate for 2021 NPPC and NPBC and December 31, 2020 disclosure on a cash flow matching analysis that utilized bond information provided by Bloomberg for all non-callable, high quality bonds (generally rated Aa or better) as of December 31, 2020. In selecting the expected rate of return on plan assets for 2021 NPPC and NPBC: a) HEI and the Utilities considered economic forecasts for the types of investments held by the plans (primarily equity and fixed income investments), the Plans’ asset allocations, industry and corporate surveys and the past performance of the plans’ assets in selecting 7.25% and b) ASB considered its liability driven investment strategy in selecting 2.96%, which is consistent with the assumed discount rate as of December 31, 2020 with a 20 basis point active manager premium. For 2020, retirement benefit plans’ assets of HEI and the Utilities had a net return of 16.9%. As of December 31, 2020, the assumed health care trend rates for 2021 and future years were as follows: medical, 6.75%, grading down to 5% for 2028 and thereafter; dental, 5%; and vision, 4%. As of December 31, 2019, the assumed health care trend rates for 2020 and future years were as follows: medical, 7%, grading down to 5% for 2028 and thereafter; dental, 5%; and vision, 4%. The components of NPPC and NPBC were as follows: Pension benefits Other benefits (in thousands) 2020 2019 2018 2020 2019 2018 HEI consolidated Service cost $ 73,387 $ 62,135 $ 68,987 $ 2,537 $ 2,209 $ 2,721 Interest cost 81,335 84,267 77,374 7,407 8,004 7,933 Expected return on plan assets (113,800) (111,989) (108,953) (12,124) (12,356) (12,908) Amortization of net prior service gain 8 (42) (42) (1,761) (1,806) (1,805) Amortization of net actuarial losses 33,456 15,479 30,084 208 (13) 95 Net periodic pension/benefit cost 74,386 49,850 67,450 (3,733) (3,962) (3,964) Impact of PUC D&Os 20,997 48,143 25,828 3,179 3,258 3,842 Net periodic pension/benefit cost (adjusted for impact of PUC D&Os) $ 95,383 $ 97,993 $ 93,278 $ (554) $ (704) $ (122) Hawaiian Electric consolidated Service cost $ 71,604 $ 60,461 $ 67,359 $ 2,515 $ 2,191 $ 2,704 Interest cost 75,484 77,851 71,294 7,103 7,673 7,628 Expected return on plan assets (107,369) (104,632) (102,368) (11,957) (12,180) (12,713) Amortization of net prior service (gain) cost 9 7 8 (1,758) (1,803) (1,803) Amortization of net actuarial losses 30,566 14,658 27,302 207 — 98 Net periodic pension/benefit cost 70,294 48,345 63,595 (3,890) (4,119) (4,086) Impact of PUC D&Os 20,997 48,143 25,828 3,179 3,258 3,842 Net periodic pension/benefit cost (adjusted for impact of PUC D&Os) $ 91,291 $ 96,488 $ 89,423 $ (711) $ (861) $ (244) The Company recorded pension expense of $59 million in each of 2020, 2019 and 2018 and OPEB expense of $(0.1) million, $(0.1) million and nil in 2020, 2019 and 2018, respectively, and charged the remaining amounts primarily to electric utility plant. The Utilities recorded pension expense of $55 million, $57 million and $55 million and OPEB (income) expense of $(0.2) million, $(0.3) million and $(0.1) million in 2020, 2019 and 2018, respectively, and charged the remaining amounts primarily to electric utility plant. Additional information on the defined benefit pension plans’ accumulated benefit obligations (ABOs), which do not consider projected pay increases (unlike the PBOs shown in the table above), and pension plans with ABOs and PBOs in excess of plan assets were as follows: HEI consolidated Hawaiian Electric consolidated December 31 2020 2019 2020 2019 (in billions) Defined benefit plans - ABOs $ 2.3 $ 2.0 $ 2.1 $ 1.8 Defined benefit plans with ABO in excess of plan assets ABOs 2.1 1.9 2.1 1.8 Fair value of plan assets 2.0 1.7 1.9 1.6 Defined benefit plans with PBOs in excess of plan assets PBOs 2.5 2.2 2.4 2.1 Fair value of plan assets 2.0 1.7 1.9 1.6 HEI consolidated . The Company estimates that the cash funding for the qualified defined benefit pension plans in 2021 will be $52 million, which should fully satisfy the minimum required contributions to those plans, including requirements of the Utilities’ pension tracking mechanisms and the Plan’s funding policy. The Company’s current estimate of contributions to its other postretirement benefit plans in 2021 is nil. As of December 31, 2020, the benefits expected to be paid under all retirement benefit plans in 2021, 2022, 2023, 2024, 2025 and 2026 through 2030 amount to $96 million, $99 million, $103 million, $107 million, $110 million and $610 million, respectively. Hawaiian Electric consolidated . The Utilities estimate that the cash funding for the qualified defined benefit pension plan in 2021 will be $51 million, which should fully satisfy the minimum required contributions to that Plan, including requirements of the pension tracking mechanisms and the Plan’s funding policy. The Utilities’ current estimate of contributions to its other postretirement benefit plans in 2021 is nil. As of December 31, 2020, the benefits expected to be paid under all retirement benefit plans in 2021, 2022, 2023, 2024, 2025 and 2026 through 2030 amounted to $88 million, $91 million, $93 million, $97 million, $101 million and $559 million, respectively. Defined contribution plans information. For each of 2020, 2019 and 2018, the Company’s expenses and cash contributions for its defined contribution plans under the HEIRSP and the ASB 401(k) Plan were $7 million. The Utilities’ expenses and cash contributions for its defined contribution plan under the HEIRSP for 2020, 2019 and 2018 were $3 million, $3 million and $2 million, respectively.

Share-based compensation

Share-based compensation	12 Months Ended
	Dec. 31, 2020
Share-based Payment Arrangement [Abstract]
Share-based compensation	Note 11 · 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 (SARs), 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 December 31, 2020, approximately 3.0 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). Restricted stock units awarded under the 2010 Equity and Incentive Plan in 2020, 2019, 2018 and 2017 will vest and be issued in unrestricted stock in four equal annual increments on the anniversaries of the grant date and are forfeited to the extent they have not become vested for terminations of employment during the vesting period, except that pro-rata vesting is provided for terminations due to death, disability and retirement. Restricted stock units expense has been recognized in accordance with the fair-value-based measurement method of accounting. Dividend equivalent rights are accrued quarterly and are paid at the end of the restriction period when the associated restricted stock units vest. Stock performance awards granted under the 2020-2022, 2019-2021 and 2018-2020 long-term incentive plans (LTIP) entitle the grantee to shares of common stock with dividend equivalent rights once service conditions and performance conditions are satisfied at the end of the three-year performance period. LTIP awards are forfeited for terminations of employment during the performance period, except that pro-rata participation is provided for terminations due to death, disability and retirement based upon completed months of service after a minimum of 12 months of service in the performance period. Compensation expense for the stock performance awards portion of the LTIP has been recognized in accordance with the fair-value-based measurement method of accounting for performance shares. 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. In June 2019, an additional 300,000 shares were made available for issuance under the 2011 Director Plan. As of December 31, 2020, there were 274,163 shares remaining available for future issuance under the 2011 Director Plan. Share-based compensation expense and the related income tax benefit were as follows: (in millions) 2020 2019 2018 HEI consolidated Share-based compensation expense 1 $ 5.8 $ 10.0 $ 7.8 Income tax benefit 1.0 1.4 1.1 Hawaiian Electric consolidated Share-based compensation expense 1 1.8 3.2 2.7 Income tax benefit 0.4 0.6 0.5 1 For 2020, 2019 and 2018, the Company has not capitalized any share-based compensation. Stock awards. HEI granted HEI common stock to nonemployee directors under the 2011 Director Plan as follows: (dollars in millions) 2020 2019 2018 Shares granted 36,100 36,344 38,821 Fair value $ 1.3 $ 1.6 $ 1.3 Income tax benefit 0.3 0.4 0.3 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: 2020 2019 2018 Shares (1) Shares (1) Shares (1) Outstanding, January 1 207,641 $ 35.36 200,358 $ 33.05 197,047 $ 31.53 Granted 78,595 47.99 96,565 37.82 93,853 34.12 Vested (77,719) 34.19 (76,813) 32.61 (75,683) 30.56 Forfeited (14,578) 36.20 (12,469) 34.20 (14,859) 32.35 Outstanding, December 31 193,939 $ 40.89 207,641 $ 35.36 200,358 $ 33.05 Total weighted-average grant-date fair value of shares granted (in millions) $ 3.8 $ 3.7 $ 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 2020, 2019 and 2018, total restricted stock units and related dividends that vested had a fair value of $4.2 million, $3.2 million and $2.7 million, respectively, and the related tax benefits were $0.7 million, $0.5 million and $0.4 million, respectively. As of December 31, 2020, there was $5.0 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 2.6 years. Long-term incentive plan payable in stock. The 2018-2020, 2019-2021 and 2020-2022 LTIPs 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 relevant three-year period. The other performance condition goals relate to EPS growth, return on average common equity (ROACE), renewable portfolio standards, Hawaiian Electric’s net income growth, ASB’s efficiency ratio and Pacific Current’s EBITDA growth and return on average invested capital. LTIP linked to TSR . Information about HEI’s LTIP grants linked to TSR was as follows: 2020 2019 2018 Shares (1) Shares (1) Shares (1) Outstanding, January 1 96,402 $ 39.62 65,578 $ 38.81 32,904 $ 39.51 Granted 24,630 48.62 35,215 41.07 37,832 38.21 Vested (issued or unissued and cancelled) (29,409) 39.51 — — — — Forfeited (2,401) 41.22 (4,391) 39.19 (5,158) 38.84 Outstanding, December 31 89,222 $ 42.10 96,402 $ 39.62 65,578 $ 38.81 Total weighted-average grant-date fair value of shares granted (in millions) $ 1.2 $ 1.4 $ 1.4 (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: 2020 2019 2018 Risk-free interest rate 1.39 % 2.48 % 2.29 % Expected life in years 3 3 3 Expected volatility 13.1 % 15.8 % 17.0 % Range of expected volatility for Peer Group 13.6% to 95.4% 15.0% to 73.2% 15.1% to 26.2% Grant date fair value (per share) $ 48.62 $ 41.07 $ 38.20 For 2020, total vested LTIP awards linked to TSR and related dividends had a fair value of $2.6 million and the related tax benefits were $0.4 million. There were no share-based LTIP awards linked to TSR with a vesting date in 2018 or 2019. As of December 31, 2020, there was $1.2 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 1.4 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: 2020 2019 2018 Shares (1) Shares (1) Shares (1) Outstanding, January 1 403,768 $ 35.15 276,169 $ 33.80 131,616 $ 33.47 Granted 98,522 48.10 140,855 37.78 151,328 34.12 Vested (135,804) 33.48 — — — — Increase above target (cancelled) (136,163) 36.44 4,314 33.53 13,858 33.49 Forfeited (9,608) 38.36 (17,570) 34.66 (20,633) 33.80 Outstanding, December 31 220,715 $ 41.03 403,768 $ 35.15 276,169 $ 33.80 Total weighted-average grant-date fair value of shares granted (at target performance levels) (in millions) $ 4.7 $ 5.3 $ 5.2 (1) Weighted-average grant-date fair value per share based on the average price of HEI common stock on the date of grant. For 2020, total vested LTIP awards linked to other performance conditions and related dividends had a fair value of $7.6 million and the related tax benefits were $1.2 million. There were no share-based LTIP awards linked to other performance conditions with a vesting date in 2018 or 2019. As of December 31, 2020, there was $4.2 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 1.4 years.

Income taxes

Income taxes	12 Months Ended
	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Income taxes	Note 12 · Income taxes The components of income taxes attributable to net income for common stock were as follows: HEI consolidated Hawaiian Electric consolidated Years ended December 31 2020 2019 2018 2020 2019 2018 (in thousands) Federal Current $ 23,207 $ 28,736 $ 42,903 $ 31,950 $ 21,751 $ 29,649 Deferred (4,215) (4,353) (6,099) (5,408) (7,793) (5,245) Deferred tax credits, net* 10,979 13,410 (12) 1,549 13,155 (12) 29,971 37,793 36,792 28,091 27,113 24,392 State Current 8,430 10,472 17,361 3,768 5,579 13,210 Deferred 2,509 (10,732) (3,269) 8,559 (8,491) (2,737) Deferred tax credits, net* — 14,104 (87) — 14,104 (87) 10,939 13,844 14,005 12,327 11,192 10,386 Total $ 40,910 $ 51,637 $ 50,797 $ 40,418 $ 38,305 $ 34,778 * In 2020, primarily represents federal tax credits related to Mauo’s solar-plus-storage project, deferred and amortized starting in 2020. In 2019, primarily represents federal and state credits related to Hawaiian Electric’s West Loch PV project, deferred and amortized starting in 2020. A reconciliation of the amount of income taxes computed at the federal statutory rate to the amount provided in the consolidated statements of income was as follows: HEI consolidated Hawaiian Electric consolidated Years ended December 31 2020 2019 2018 2020 2019 2018 (in thousands) Amount at the federal statutory income tax rate $ 50,531 $ 56,996 $ 53,437 $ 44,468 $ 41,399 $ 37,889 Increase (decrease) resulting from: State income taxes, net of federal income tax benefit 9,448 11,658 11,832 9,658 8,703 8,080 Net deferred tax asset (liability) adjustment related to the Tax Act (11,267) (9,255) (9,540) (11,267) (9,255) (9,285) Other, net (7,802) (7,762) (4,932) (2,441) (2,542) (1,906) Total $ 40,910 $ 51,637 $ 50,797 $ 40,418 $ 38,305 $ 34,778 Effective income tax rate 17.0 % 19.0 % 20.0 % 19.1 % 19.4 % 19.3 % The tax effects of book and tax basis differences that give rise to deferred tax assets and liabilities were as follows: HEI consolidated Hawaiian Electric consolidated December 31 2020 2019 2020 2019 (in thousands) Deferred tax assets Regulatory liabilities, excluding amounts attributable to property, plant and equipment $ 93,684 $ 100,427 $ 93,684 $ 100,427 Operating lease liabilities 41,582 51,573 34,586 45,608 Revenue taxes 22,726 20,922 22,726 20,922 Allowance for bad debts 31,973 14,858 4,835 560 Other 1 44,127 33,106 24,741 20,259 Total deferred tax assets 234,092 220,886 180,572 187,776 Deferred tax liabilities Property, plant and equipment related 487,209 464,312 473,734 458,349 Operating lease right-of-use assets 41,370 51,542 34,586 45,608 Regulatory assets, excluding amounts attributable to property, plant and equipment 25,841 33,897 25,841 33,897 Retirement benefits 18,407 9,684 20,537 13,072 Other 56,354 40,776 23,672 14,001 Total deferred tax liabilities 629,181 600,211 578,370 564,927 Net deferred income tax liability $ 395,089 $ 379,325 $ 397,798 $ 377,151 1 As of December 31, 2020, HEI consolidated and Hawaiian Electric consolidated have deferred tax assets of $10.9 million and $5.8 million respectively, relating to the benefit of state tax credit carryforwards of $14.6 million and $7.8 million respectively. These state tax credit carryforwards primarily relate to the West Loch PV project and do not expire. The Company concluded that as of December 31, 2020, a valuation allowance is not required. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the periods in which those temporary differences are deductible. Based upon historical taxable income and projections for future taxable income, management believes it is more likely than not the Company and the Utilities will realize substantially all of the benefits of the deferred tax assets. As of December 31, 2020 and 2019, valuation allowances for deferred tax benefits were nil. The Utilities are included in the consolidated federal and Hawaii income tax returns of HEI and are subject to the provisions of HEI’s tax sharing agreement, which determines each subsidiary’s (or subgroup’s) income tax return liabilities and refunds on a standalone basis as if it filed a separate return (or subgroup consolidated return). The following is a reconciliation of the Company’s liability for unrecognized tax benefits for 2020, 2019 and 2018. HEI consolidated Hawaiian Electric consolidated (in millions) 2020 2019 2018 2020 2019 2018 Unrecognized tax benefits, January 1 $ 2.2 $ 2.1 $ 4.0 $ 1.7 $ 1.6 $ 3.5 Additions based on tax positions taken during the year 0.2 0.5 0.3 0.2 0.5 0.3 Reductions based on tax positions taken during the year — — — — — — Additions for tax positions of prior years 11.6 0.1 0.1 11.6 0.1 0.1 Reductions for tax positions of prior years (0.1) (0.2) (0.1) (0.1) (0.2) (0.1) Lapses of statute of limitations (0.2) (0.3) (2.2) (0.2) (0.3) (2.2) Settlement (1.0) — — (0.5) — — Unrecognized tax benefits, December 31 $ 12.7 $ 2.2 $ 2.1 $ 12.7 $ 1.7 $ 1.6 At December 31, 2020 and 2019, there were $11.6 million and $0.5 million, respectively, of unrecognized tax benefits that, if recognized, would affect the Company’s annual effective tax rate. As of December 31, 2020 and 2019, the Utilities had $11.6 million and nil, respectively, of unrecognized tax benefits that, if recognized, would affect the Utilities’ annual effective tax rate. HEI consolidated. The Company recognizes interest accrued related to unrecognized tax benefits in “Interest expense-other than on deposit liabilities and other bank borrowings” and penalties, if any, in operating expenses. In 2020, 2019 and 2018, the Company recognized approximately $(0.5) million, $0.1 million and $(0.1) million in interest expense. The Company had $0.1 million and $0.6 million of interest accrued as of December 31, 2020 and 2019, respectively. Hawaiian Electric consolidated. The Utilities recognize interest accrued related to unrecognized tax benefits in “Interest expense and other charges, net” and penalties, if any, in operating expenses. In 2020, 2019 and 2018, the Utilities recognized approximately $(0.3) million, $0.1 million and $0.1 million in interest expense. The Utilities had $0.1 million and $0.4 million of interest accrued as of December 31, 2020 and 2019, respectively. As of December 31, 2020, the disclosures above present the Company’s and the Utilities’ accruals for potential tax liabilities, which involve management’s judgment regarding the likelihood of the benefits being sustained under governmental review. While the Company and the Utilities currently do not expect material changes to occur in the next twelve months, the Company and the Utilities are generally unable to estimate the range of impacts on the balance of uncertain tax positions or the impact on the effective tax rate from the resolution of these issues until the Internal Revenue Service addresses them in the current examination process, and therefore, it is possible that the amount of unrecognized benefit with respect to the Company’s and the Utilities’ uncertain tax positions could increase or decrease within the next 12 months. The final resolution of uncertain tax positions could result in adjustments to recorded amounts. Based on information currently available, the Company and the Utilities believe these accruals have adequately provided for potential income tax issues with federal and state tax authorities, and that the ultimate resolution of tax issues for all open tax periods will not have a material adverse effect on its results of operations, financial condition or liquidity. The statute of limitations for IRS examinations has expired for years prior to 2017. The Company is currently under IRS examination for the tax years 2017 and 2018. In the fourth quarter of 2020, the Company and the Hawaii Department of Taxation agreed to a final assessment of tax liabilities for the years 2011 through 2018, however, the statute of limitations for Hawaii remains open for tax years 2011 and subsequent.

Cash flows

Cash flows	12 Months Ended
	Dec. 31, 2020
Supplemental Cash Flow Elements [Abstract]
Cash flows	Note 13 · Cash flows Years ended December 31 2020 2019 2018 (in millions) Supplemental disclosures of cash flow information HEI consolidated Interest paid to non-affiliates, net of amounts capitalized $ 98 $ 107 $ 102 Income taxes paid (including refundable credits) 32 56 72 Income taxes refunded (including refundable credits) 3 4 34 Hawaiian Electric consolidated Interest paid to non-affiliates, net of amounts capitalized 65 68 73 Income taxes paid (including refundable credits) 41 55 64 Income taxes refunded (including refundable credits) 3 4 31 Supplemental disclosures of noncash activities HEI consolidated Unpaid invoices and accruals for capital expenditures, balance, end of period (investing) 44 64 59 Right-of-use assets obtained in exchange for operating lease obligations (investing) 26 7 — Common stock issued (gross) for director and executive/management compensation (financing) 1 16 5 4 Obligations to fund low income housing investments, net (investing) 25 11 12 Transfer of retail repurchase agreements to deposit liabilities (financing) — — 102 Hawaiian Electric consolidated Unpaid invoices and accruals for capital expenditures, balance, end of period (investing) 41 62 44 Right-of-use assets obtained in exchange for operating lease obligations (investing) 17 2 — HEI Consolidated and Hawaiian Electric consolidated Electric utility property, plant and equipment Estimated fair value of noncash contributions in aid of construction (investing) 10 9 14 Acquisition of Hawaiian Telcom’s interest in joint poles (investing) — — 48 Reduction of long-term debt from funds previously transferred for repayment (financing) 82 — — 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.

Regulatory restrictions on net

Regulatory restrictions on net assets	12 Months Ended
	Dec. 31, 2020
Broker-Dealer, Net Capital Requirement, SEC Regulation [Abstract]
Regulatory restrictions on net assets	Note 14 · Regulatory restrictions on net assets The abilities of certain of HEI’s subsidiaries to pay dividends or make other distributions to HEI are subject to contractual and regulatory restrictions. Under the PUC Agreement, in the event that the consolidated common stock equity of the electric utility subsidiaries falls below 35% of the total capitalization of the electric utilities (including the current maturities of long-term debt, but excluding short-term borrowings), the electric utility subsidiaries would, absent PUC approval, be restricted in their payment of cash dividends to 80% of the earnings available for the payment of dividends in the current fiscal year and preceding five years, less the amount of dividends paid during that period. The PUC Agreement also provides that the foregoing dividend restriction shall not be construed as relinquishing any right the PUC may have to review the dividend policies of the electric utility subsidiaries. As of December 31, 2020, the consolidated common stock equity of HEI’s electric utility subsidiaries was 57% of their total capitalization (as calculated for purposes of the PUC Agreement). As of December 31, 2020, Hawaiian Electric and its subsidiaries had common stock equity of $2.1 billion of which approximately $859 million was not available for transfer to HEI in the form of dividends, loans or advances without regulatory approval. The ability of ASB to make capital distributions to HEI and other affiliates is restricted under federal law. Subject to a limited exception for stock redemptions that do not result in any decrease in ASB’s capital and would improve ASB’s financial condition, ASB is prohibited from declaring any dividends, making any other capital distributions, or paying a management fee to a controlling person if, following the distribution or payment, ASB would be deemed to be undercapitalized, significantly undercapitalized or critically undercapitalized. ASB is required to notify the FRB and OCC prior to making any capital distribution (including dividends) to HEI (through ASB Hawaii). All dividends are subject to review by the OCC and FRB and receipt of a letter from the FRB communicating the agencies’ non-objection to the payment of any dividend ASB proposes to declare and pay to ASB Hawaii and HEI. Generally, the FRB and OCC may disapprove or deny ASB’s request to make a capital distribution if the proposed distribution will cause ASB to become undercapitalized, or the proposed distribution raises safety and soundness concerns, or the proposed distribution violates a prohibition contained in any statute, regulation or agreement between ASB and the OCC. As of December 31, 2020, in order to maintain its “well-capitalized” position, ASB could not transfer approximately $405 million of net assets to HEI. HEI and its subsidiaries are also subject to debt covenants, preferred stock resolutions and the terms of guarantees that could limit their respective abilities to pay dividends. The Company does not expect that the regulatory and contractual restrictions applicable to HEI and/or its subsidiaries will significantly affect the operations of HEI or its ability to pay dividends on its common stock.

Significant group concentration

Significant group concentrations of credit risk	12 Months Ended
	Dec. 31, 2020
Risks and Uncertainties [Abstract]
Significant group concentrations of credit risk	Note 15 · Significant group concentrations of credit risk Most of the Company’s business activity is with customers located in the State of Hawaii. The Utilities are regulated operating electric public utilities engaged in the generation, purchase, transmission, distribution and sale of electricity on the islands of Oahu, Hawaii, Maui, Lanai and Molokai in the State of Hawaii. The Utilities provide the only electric public utility service on the islands they serve. The Utilities extend credit to customers, all of whom reside or conduct business in the State of Hawaii. See Note 3 of the Consolidated Financial Statements for a discussion of the Utilities’ major customers. The International Brotherhood of Electrical Workers Local 1260 represents roughly half of the Utilities’ workforce covered by a collective bargaining agreement that expires on October 31, 2021. Most of ASB’s financial instruments are based in the State of Hawaii, except for the investment securities it owns. Substantially all real estate loans are collateralized by real estate in Hawaii. ASB’s policy is to require mortgage insurance on all real estate loans with a loan to appraisal ratio in excess of 80% at origination. Pacific Current’s investments are in the State of Hawaii since its strategy is focused on investing in non-regulated renewable energy and sustainable infrastructure in the State of Hawaii.

Fair value measurements

Fair value measurements	12 Months Ended
	Dec. 31, 2020
Fair Value Disclosures [Abstract]
Fair value measurements	Note 16 · 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 bonds 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. Collateral dependent loans . Collateral dependent loans have been adjusted to fair value. When a loan is identified as collateral dependent, the Company measures the impairment using the current fair value of the collateral, less selling costs. Depending on the characteristics of a loan, the fair value of collateral is generally estimated by obtaining external appraisals, but in some cases, the value of the collateral may be estimated as having little or no 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. If it is determined that the value of the collateral dependent loan is less than its recorded investment, the Company recognizes this impairment and adjusts the carrying value of the loan to fair value through the allowance for credit losses. 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 . 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. MSRs 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 its own experience and expertise to arrive at a value. ASB uses the third-party value only to assess the reasonableness of its own estimate. Time deposits . The fair value of fixed-maturity certificates of deposit was estimated by discounting the future cash flows using the rates currently offered for FHLB advances of similar remaining maturities. Deposit liabilities are classified in Level 2 of the valuation hierarchy. Other borrowings . For 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 fixed-rate long-term debt—other than bank 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. The carrying amount of floating rate long-term debt—other than bank approximated fair value because of the short-term interest reset periods. Long-term debt—other than bank is classified in Level 2 of the valuation hierarchy. 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. 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. Estimated fair value (in thousands) Carrying or notional Quoted prices in active markets for identical assets Significant other observable inputs Significant unobservable inputs Total December 31, 2020 Financial assets HEI consolidated Available-for-sale investment securities $ 1,970,417 $ — $ 1,943,232 $ 27,185 $ 1,970,417 Held-to-maturity investment securities 226,947 — 229,963 — 229,963 Stock in Federal Home Loan Bank 8,680 — 8,680 — 8,680 Loans, net 5,260,917 — 28,354 5,410,976 5,439,330 Mortgage servicing rights 10,020 — 10,705 10,705 Derivative assets 120,980 — 4,536 — 4,536 Financial liabilities HEI consolidated Deposit liabilities 548,830 — 552,800 — 552,800 Short-term borrowings—other than bank 129,379 — 129,379 — 129,379 Other bank borrowings 89,670 — 89,669 — 89,669 Long-term debt, net—other than bank 2,119,129 — 2,487,790 — 2,487,790 Derivative liabilities 137,500 500 4,530 — 5,030 Hawaiian Electric consolidated Short-term borrowings 49,979 — 49,979 — 49,979 Long-term debt, net 1,561,302 — 1,890,490 — 1,890,490 December 31, 2019 Financial assets HEI consolidated Available-for-sale investment securities $ 1,232,826 $ — $ 1,204,229 $ 28,597 $ 1,232,826 Held-to-maturity investment securities 139,451 — 143,467 — 143,467 Stock in Federal Home Loan Bank 8,434 — 8,434 — 8,434 Loans, net 5,080,107 — 12,295 5,145,242 5,157,537 Mortgage servicing rights 9,101 — — 12,379 12,379 Derivative assets 25,179 — 300 — 300 Financial liabilities HEI consolidated Deposit liabilities 769,825 — 765,976 — 765,976 Short-term borrowings—other than bank 185,710 — 185,710 — 185,710 Other bank borrowings 115,110 — 115,107 — 115,107 Long-term debt, net—other than bank 1,964,365 2,156,927 2,156,927 Derivative liabilities 51,375 33 2,185 — 2,218 Hawaiian Electric consolidated Short-term borrowings 88,987 — 88,987 — 88,987 Long-term debt, net 1,497,667 — 1,670,189 — 1,670,189 Fair value measurements on a recurring basis. Assets and liabilities measured at fair value on a recurring basis were as follows: December 31 2020 2019 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-backed securities — issued or guaranteed by U.S. Government agencies or sponsored agencies $ — $ 1,849,559 $ — $ — $ 1,026,385 $ — U.S. Treasury and federal agency obligations — 62,322 — — 117,787 — Corporate bonds — 31,351 — — 60,057 — Mortgage revenue bonds — — 27,185 — — 28,597 $ — $ 1,943,232 $ 27,185 $ — $ 1,204,229 $ 28,597 Derivative assets Interest rate lock commitments (bank segment) 1 $ — $ 4,536 $ — $ — $ 297 $ — Forward commitments (bank segment) 1 — — — — 3 — $ — $ 4,536 $ — $ — $ 300 $ — Derivative liabilities Forward commitments (bank segment) 1 $ 500 $ — $ — $ 33 $ 12 $ — Interest rate swap (Other segment) 2 — 4,530 — — 2,173 — $ 500 $ 4,530 $ — $ 33 $ 2,185 $ — 1 Derivatives are carried at fair value in other assets or other liabilities in the balance sheets with changes in value included in mortgage banking income. 2 Derivatives are included in Other 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 years ended December 31, 2020 and 2019. The changes in Level 3 assets and liabilities measured at fair value on a recurring basis were as follows: (in thousands) 2020 2019 Mortgage revenue bonds Balance, January 1 $ 28,597 $ 23,636 Principal payments received (1,641) — Purchases 229 4,961 Unrealized gain (loss) included in other comprehensive income — — Balance, December 31 $ 27,185 $ 28,597 ASB holds two mortgage revenue bonds 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 December 31, 2020, the weighted average discount rate was 2.13% 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 using (in thousands) Balance Level 1 Level 2 Level 3 December 31, 2020 Loans $ 387 $ — $ — $ 387 Mortgage servicing rights 3,001 — — 3,001 December 31, 2019 Loans 25 — — 25 For 2020 and 2019, 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 (dollars in thousands) Fair value Valuation technique Significant unobservable input Range Weighted December 31, 2020 Commercial loan $ 387 Fair value of collateral Appraised value less selling cost N/A (2) N/A (2) Mortgage servicing rights $ 3,001 Discounted cash flow Prepayment speed 15-22% 22% Discount rate 9.3% December 31, 2019 Residential land $ 25 Fair value of collateral Appraised value less selling cost N/A (2) N/A (2) (1) Represent percent of outstanding principal balance. (2) N/A - Not applicable. There is one asset in each fair value measurement type. Significant increases (decreases) in any of those inputs in isolation would result in significantly higher (lower) fair value measurements.

Quarterly information (unaudite

Quarterly information (unaudited)	12 Months Ended
	Dec. 31, 2020
Quarterly Financial Information Disclosure [Abstract]
Quarterly information (unaudited)	Note 17 · Quarterly information (unaudited) Selected quarterly information was as follows: Quarters ended Years ended (in thousands, except per share amounts) March 31 June 30 Sept. 30 Dec. 31 December 31 HEI consolidated 2020 Revenues $ 677,186 $ 608,945 $ 641,427 $ 652,217 $ 2,579,775 Operating income 59,702 71,556 99,561 80,674 311,493 Net income 33,893 49,360 65,503 50,958 199,714 Net income for common stock 33,420 48,887 65,032 50,485 197,824 Basic earnings per common share 2 0.31 0.45 0.60 0.46 1.81 Diluted earnings per common share 3 0.31 0.45 0.59 0.46 1.81 Dividends per common share 0.33 0.33 0.33 0.33 1.32 2019 Revenues $ 661,615 $ 715,485 $ 770,882 $ 725,966 $ 2,873,948 Operating income 1 77,937 72,634 96,655 100,795 348,021 Net income 1 46,161 42,985 63,890 66,736 219,772 Net income for common stock 1 45,688 42,512 63,419 66,263 217,882 Basic earnings per common share 1,2 0.42 0.39 0.58 0.61 2.00 Diluted earnings per common share 1,3 0.42 0.39 0.58 0.61 1.99 Dividends per common share 0.32 0.32 0.32 0.32 1.28 Hawaiian Electric consolidated 2020 Revenues $ 597,442 $ 534,215 $ 562,568 $ 571,095 $ 2,265,320 Operating income 43,958 67,801 88,518 68,273 268,550 Net income 24,404 42,828 60,563 43,540 171,335 Net income for common stock 23,905 42,329 60,065 43,041 169,340 2019 Revenues $ 578,495 $ 633,784 $ 688,330 $ 645,333 2,545,942 Operating income 56,560 55,694 71,793 70,331 254,378 Net income 32,625 33,073 47,277 45,860 158,835 Net income for common stock 32,126 32,574 46,779 45,361 156,840 Note: HEI owns all of Hawaiian Electric’s common stock, therefore per share data for Hawaiian Electric is not meaningful. 1 Operating income for the fourth quarter of 2019 includes gains on property sales totaling $10.8 million, and net income and net income for common stock includes $7.9 million (or $0.07 per share (basic and diluted) at ASB’s 26.8% statutory tax rate). 2 The quarterly basic earnings per common share are based upon the weighted-average number of shares of common stock outstanding in each quarter. 3 The quarterly diluted earnings per common share are based upon the weighted-average number of shares of common stock outstanding in each quarter plus the dilutive incremental shares at quarter end.

SCHEDULE I - CONDENSED FINANCIA

SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF REGISTRANT	12 Months Ended
	Dec. 31, 2020
Condensed Financial Information Disclosure [Abstract]
SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF REGISTRANT	SCHEDULE I — CONDENSED FINANCIAL INFORMATION OF REGISTRANT HAWAIIAN ELECTRIC INDUSTRIES, INC. (PARENT COMPANY) CONDENSED BALANCE SHEETS December 31 2020 2019 (dollars in thousands) Assets Cash and cash equivalents $ 299 $ 953 Accounts receivable 738 779 Notes receivable from subsidiaries — 22,598 Property, plant and equipment, net 2,456 2,931 Deferred income tax assets 14,236 10,754 Other assets and intercompany receivables 18,726 21,770 Investments in subsidiaries, at equity 2,893,781 2,761,802 Total assets $ 2,930,236 $ 2,821,587 Liabilities and shareholders’ equity Liabilities Accounts payable $ 673 $ 1,509 Interest payable 2,918 3,041 Commercial paper 64,491 96,723 Short-term debt, net 14,909 — Long-term debt, net 449,145 399,064 Retirement benefits liability 31,688 29,367 Other 28,910 11,623 Total liabilities 592,734 541,327 Shareholders’ equity Preferred stock, no par value, authorized 10,000,000 shares; issued: none — — Common stock, no par value, authorized 200,000,000 shares; issued and outstanding: 109,181,124 shares and 108,973,328 shares at December 31, 2020 and 2019, respectively 1,678,368 1,678,257 Retained earnings 660,398 622,042 Accumulated other comprehensive loss, net of tax benefits (1,264) (20,039) Total shareholders’ equity 2,337,502 2,280,260 Total liabilities and shareholders’ equity $ 2,930,236 $ 2,821,587 SCHEDULE I — CONDENSED FINANCIAL INFORMATION OF REGISTRANT (continued) HAWAIIAN ELECTRIC INDUSTRIES, INC. (PARENT COMPANY) CONDENSED STATEMENTS OF INCOME Years ended December 31 2020 2019 2018 (in thousands) Revenues $ 208 $ 777 $ 429 Equity in net income of subsidiaries 227,098 246,005 226,972 Expenses: Operating, administrative and general 20,731 19,195 19,515 Depreciation of property, plant and equipment 485 570 597 Taxes, other than income taxes 654 570 509 Total expenses 21,870 20,335 20,621 Income before interest expense and income tax benefits 205,436 226,447 206,780 Retirement defined benefits expense—other than service costs 634 442 674 Interest expense 18,237 17,930 12,664 Income before income tax benefits 186,565 208,075 193,442 Income tax benefits 11,259 9,807 8,332 Net income $ 197,824 $ 217,882 $ 201,774 HAWAIIAN ELECTRIC INDUSTRIES, INC. (PARENT COMPANY) STATEMENTS OF COMPREHENSIVE INCOME STATEMENTS OF CHANGES IN SHAREHOLDERS’ EQUITY Incorporated by reference are HEI and Subsidiaries’ Statements of Consolidated Comprehensive Income and Consolidated Statements of Changes in Shareholders’ Equity in Part II, Item 8. SCHEDULE I — CONDENSED FINANCIAL INFORMATION OF REGISTRANT (continued) HAWAIIAN ELECTRIC INDUSTRIES, INC. (PARENT COMPANY) CONDENSED STATEMENTS OF CASH FLOWS Years ended December 31 2020 2019 2018 (in thousands) Net cash provided by operating activities $ 134,363 $ 131,120 $ 135,470 Cash flows from investing activities Increase in note receivable from subsidiary — (1,187) (20,596) Decrease in note receivable from subsidiary 22,719 — — Capital expenditures (20) (47) (143) Investments in subsidiaries (42,664) (38,935) (71,970) Other 2,435 (1,001) 140 Net cash used in investing activities (17,530) (41,170) (92,569) Cash flows from financing activities Net decrease in notes payable to subsidiaries with original maturities of three months or less — — (30) Net increase (decrease) in short-term borrowings with original maturities of three months or less (32,232) 47,731 (14,000) Proceeds from issuance of short-term debt 65,000 — — Repayment of short-term debt (50,000) — (50,000) Proceeds from issuance of long-term debt 50,000 — 150,000 Proceeds from issuance of syndicated credit facility 66,300 — — Repayment of syndicated credit facility (66,300) — — Withheld shares for employee taxes on vested share-based compensation (5,700) (997) (996) Common stock dividends (144,096) (139,463) (134,987) Other (459) (10) (848) Net cash used in financing activities (117,487) (92,739) (50,861) Net decrease in cash and equivalents (654) (2,789) (7,960) Cash and cash equivalents, January 1 953 3,742 11,702 Cash and cash equivalents, December 31 $ 299 $ 953 $ 3,742 NOTES TO CONDENSED FINANCIAL INFORMATION Basis of Presentation The “Notes to Consolidated Financial Statements” in Part II, Item 8 should be read in conjunction with the above HEI (Parent Company) financial statements. All HEI subsidiaries are reflected in the Condensed Financial Statements under the equity method. Income taxes for equity method investments are included in “Equity in net income of subsidiaries.” Long-term debt The components of long-term debt, net, were as follows: December 31 2020 2019 (dollars in thousands) HEI 2.99% term loan, due 2022 $ 150,000 $ 150,000 HEI 5.67% senior note, due 2021 50,000 50,000 HEI 3.99% senior note, due 2023 50,000 50,000 HEI 4.58% senior notes, due 2025 50,000 50,000 HEI 4.72% senior notes, due 2028 100,000 100,000 HEI 2.98% senior notes, due 2030 50,000 — Less unamortized debt issuance costs (855) (936) Long-term debt, net $ 449,145 $ 399,064 The aggregate payments of principal required within five years after December 31, 2020 on long-term debt are $50 million in 2021, $150 million in 2022, $50 million in 2023, nil in 2024, $50 million for 2025, and $150 million thereafter. Indemnities As of December 31, 2020, HEI has a General Agreement of Indemnity in favor of both Liberty Mutual Insurance Company (Liberty) and Travelers Casualty and Surety Company of America (Travelers) for losses in connection with any and all bonds, undertakings or instruments of guarantee and any renewals or extensions thereof executed by Liberty or Travelers, including, but not limited to, a $0.6 million self-insured United States Longshore & Harbor bond and a $0.7 million self-insured automobile bond. Income taxes The Company’s financial reporting policy for income tax allocations is based upon a separate entity concept whereby each subsidiary provides income tax expense (or benefits) as if each were a separate taxable entity. The difference between the aggregate separate tax return income tax provisions and the consolidated financial reporting income tax provision is charged or credited to HEI’s separate tax provision. Dividends from HEI subsidiaries In 2020, 2019 and 2018, cash dividends received from subsidiaries were $145 million, $157 million and $154 million, respectively. Supplemental disclosures of noncash activities In 2020, 2019 and 2018, $2.3 million, $2.3 million and $2.3 million, respectively, of HEI accounts receivable from ASB Hawaii were reduced with a corresponding reduction in HEI notes payable to ASB Hawaii in noncash transactions. In 2020, 2019 and 2018, $2.3 million, $2.3 million and $2.3 million, respectively, were contributed as equity by HEI into ASB Hawaii with a corresponding increase in HEI notes payable to ASB Hawaii in noncash transactions. Under the HEI DRIP, common stock dividends reinvested by shareholders in HEI common stock in noncash transactions was immaterial for 2020, 2019 and 2018 as HEI satisfied the share purchase requirements of the DRIP in 2020, 2019 and 2018 through open market purchases of its common stock rather than new issuances.

SCHEDULE II - VALUATION AND QUA

SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS	12 Months Ended
	Dec. 31, 2020
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]
SCHEDULE II-VALUATION AND QUALIFYING ACCOUNTS	SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS Years ended December 31, 2020, 2019 and 2018 Col. A Col. B Col. C Col. D Col. E (in thousands) Additions Description Balance Charged to Charged Deductions Balance at 2020 Allowance for uncollectible accounts – electric utility $ 1,377 $ 2,100 $ 18,041 (a),(b) $ 3,709 (c) $ 17,809 Allowance for credit losses for loans – bank $ 72,796 (d) $ 49,811 (e) $ 4,748 (b) $ 26,154 (c) $ 101,201 2019 Allowance for uncollectible accounts – electric utility $ 1,480 $ 2,106 $ 795 (b), (f) $ 3,004 (c),(f) $ 1,377 Allowance for credit losses for loans – bank $ 52,119 $ 23,480 (e) $ 6,418 (b) $ 28,662 (c) $ 53,355 2018 Allowance for uncollectible accounts – electric utility $ 1,178 $ 2,474 $ (4,099) (b) $ (1,927) (c),(f) $ 1,480 Allowance for credit losses for loans – bank $ 53,637 $ 14,745 (e) $ 4,254 (b) $ 20,517 (c) $ 52,119 Deferred tax valuation allowance – HEI $ 38 $ — $ — $ 38 $ — (a) $16,700 of bad debt expenses has been deferred to regulatory assets pursuant to a PUC order as the recovery is probable. (b) Primarily recoveries. (c) Bad debts charged off. (d) Includes impact of adopting ASU No. 2016-13 of $19,441. (e) Represents provision for loan losses.

Summary of significant accoun_2

Summary of significant accounting policies (Policies)	12 Months Ended
	Dec. 31, 2020
Accounting Policies [Abstract]
Basis of presentation	In preparing the consolidated financial statements in conformity with accounting principles generally accepted in the United States of America (GAAP), management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities and the reported amounts of revenues and expenses. Actual results could differ significantly from those estimates.
Use of estimates	Material estimates that are particularly susceptible to significant change for HEI and its subsidiaries (collectively, the Company) include the amounts reported as fair value for investment securities (ASB only); pension and other postretirement benefit obligations; contingencies and litigation; income taxes; regulatory assets and liabilities (Utilities only); electric utility unbilled revenues (Utilities only); asset retirement obligations (Utilities only); goodwill (ASB only) and allowance for credit losses (ASB only).
Consolidation	The HEI consolidated financial statements include the accounts of HEI and its subsidiaries. The Hawaiian Electric consolidated financial statements include the accounts of Hawaiian Electric and its subsidiaries. When HEI or Hawaiian Electric has a controlling financial interest in another entity (usually, majority voting interest), that entity is consolidated. Investments in companies over which the Company or the Utilities have the ability to exercise significant influence, but not control, are accounted for using the equity method. The consolidated financial statements exclude variable interest entities (VIEs) when the Company or the Utilities are not the primary beneficiaries. In general, significant intercompany amounts are eliminated in consolidation
Cash and cash equivalents	The Utilities consider cash on hand, deposits in banks, money market accounts, certificates of deposit, short-term commercial paper of non-affiliates and liquid investments (with original maturities of three months or less) to be cash and cash equivalents. The Company considers the same items to be cash and cash equivalents as well as ASB’s deposits with the Federal Home Loan Bank (FHLB), federal funds sold (excess funds that ASB loans to other banks overnight at the federal funds rate) and securities purchased under resale agreements with original maturities of three months or less.
Restricted cash	The Utilities consider funds on deposit with trustees, which represent the undrawn proceeds from the issuance of special purpose revenue bonds, to be restricted cash because these funds are available only to finance (or reimburse payment of) approved capital expenditures.
Property, plant and equipment	Property, plant and equipment are reported at cost. Self-constructed electric utility plant includes engineering, supervision, administrative and general costs and an allowance for the cost of funds used during the construction period. These costs are recorded in construction in progress and are transferred to utility plant when construction is completed and the facilities are either placed in service or become useful for public utility purposes. Costs for betterments that make utility plant more useful, more efficient, of greater durability or of greater capacity are also capitalized. Upon the retirement or sale of electric utility plant, generally no gain or loss is recognized. The cost of the plant retired is charged to accumulated depreciation. Amounts collected from customers for cost of removal are included in regulatory liabilities.
Depreciation	Depreciation is computed primarily using the straight-line method over the estimated lives of the assets being depreciated. Electric utility plant additions in the current year are depreciated beginning January 1 of the following year in accordance with rate-making. Electric utility plant has lives ranging from 16 to 51 years for production plant, from 10 to 79 years for transmission and distribution plant, and from 5 to 50 years for general plant.
Retirement benefits	Pension and other postretirement benefit costs are charged primarily to expense and electric utility plant (in the case of the Utilities). Funding for the Company’s qualified pension plans (Plans) is based on actuarial assumptions adopted by the Pension Investment Committee administering the Plans. The participating employers contribute amounts to pension trusts for the Plans in accordance with the funding requirements of the Employee Retirement Income Security Act of 1974, as amended (ERISA), including changes promulgated by the Pension Protection Act of 2006, and considering the deductibility of contributions under the Internal Revenue Code. The Company generally funds at least the net periodic pension cost during the year, subject to ERISA minimum and Internal Revenue Code limits and targeted funded status.Certain health care and/or life insurance benefits are provided to eligible retired employees and the employees’ beneficiaries and covered dependents. The Company generally funds the net periodic postretirement benefit costs other than pensions (except for executive life) for postretirement benefits other than pensions (OPEB), while maximizing the use of the most tax-advantaged funding vehicles, subject to cash flow requirements and reviews of the funded status with the consulting actuary.
Environmental expenditures	The Company and the Utilities are subject to numerous federal and state environmental statutes and regulations. In general, environmental contamination treatment costs are charged to expense. Environmental costs are capitalized if the costs extend the life, increase the capacity, or improve the safety or efficiency of property; the costs mitigate or prevent future environmental contamination; or the costs are incurred in preparing the property for sale. Environmental costs are either capitalized or charged to expense when environmental assessments and/or remedial efforts are probable and the cost can be reasonably estimated. The Utilities review their sites and measure the liability quarterly by assessing a range of reasonably likely costs of each identified site using currently available information, including existing technology, presently enacted laws and regulations, experience gained at similar sites, and the probable level of involvement and financial condition of other potentially responsible parties.
Income taxes	Deferred income tax assets and liabilities are established for the temporary differences between the financial reporting bases and the tax bases of the Company’s and the Utilities’ assets and liabilities at federal and state tax rates expected to be in effect when such deferred tax assets or liabilities are realized or settled. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the periods in which those temporary differences become deductible. Valuation allowances are established when necessary to reduce deferred income tax assets to the amount expected to be realized. HEI and the Utilities’ investment tax credits are deferred and amortized over the estimated useful lives of the properties to which the credits relate (and for the Utilities, this treatment is in accordance with Accounting Standards Codification (ASC) Topic 980, “Regulated Operations”). The Utilities are included in the consolidated income tax returns of HEI. However, income tax expense has been computed for financial statement purposes as if each utility filed a separate income tax return and Hawaiian Electric filed a consolidated Hawaiian Electric income tax return. Governmental tax authorities could challenge a tax return position taken by the Company. The Company and the Utilities use a “more-likely-than-not” recognition threshold and measurement standard for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return.
Fair value measurements	Fair value estimates are estimates of the price that would be received to sell an asset, or paid upon the transfer of a liability, in an orderly transaction between market participants at the measurement date. The fair value estimates are generally determined based on assumptions that market participants would use in pricing the asset or liability and are based on market data obtained from independent sources. However, in certain cases, the Company and the Utilities use their own assumptions about market participant assumptions based on the best information available in the circumstances. These valuations are estimates at a specific point in time, based on relevant market information, information about the financial instrument and judgments regarding future expected loss experience, economic conditions, risk characteristics of various financial instruments and other factors. These estimates do not reflect any premium or discount that could result if the Company or the Utilities were to sell its entire holdings of a particular financial instrument at one time. Because no active trading market exists for a portion of the Company’s and the Utilities’ financial instruments, fair value estimates cannot be determined with precision. Changes in the underlying assumptions used, including discount rates and estimates of future cash flows, could significantly affect the estimates. In addition, the tax ramifications related to the realization of the unrealized gains and losses could have a significant effect on fair value estimates, but have not been considered in making such estimates. The Company and the Utilities group their financial assets measured at fair value in three levels outlined as follows: Level 1: Inputs to the valuation methodology are quoted prices, unadjusted, for identical assets or liabilities in active markets. A quoted price in an active market provides the most reliable evidence of fair value and is used to measure fair value whenever available. Level 2: Inputs to the valuation methodology include quoted prices for similar assets or liabilities in active markets; inputs to the valuation methodology include quoted prices for identical or similar assets or liabilities in markets that are not active; or inputs to the valuation methodology that are derived principally from or can be corroborated by observable market data by correlation or other means. Level 3: Inputs to the valuation methodology are unobservable and significant to the fair value measurement. Level 3 assets and liabilities include financial instruments whose value is determined using discounted cash flow methodologies, as well as instruments for which the determination of fair value requires significant management judgment or estimation. Classification in the hierarchy is based upon the lowest level input that is significant to the fair value measurement of the asset or liability. For instruments classified in Level 1 and 2 where inputs are primarily based upon observable market data, there is less judgment applied in arriving at the fair value. For instruments classified in Level 3, management judgment is more significant due to the lack of observable market data. The Company reviews and updates the fair value hierarchy classifications on a quarterly basis. Changes from one quarter to the next related to the observability of inputs in fair value measurements may result in a reclassification between the fair value hierarchy levels and are recognized based on period-end balances. Fair value is also used on a nonrecurring basis to evaluate certain assets for impairment or for disclosure purposes. Examples of nonrecurring uses of fair value include mortgage servicing rights accounted for by the amortization method, loan impairments for certain loans, real estate acquired in settlement of loans, goodwill and asset retirement obligations (AROs).
Earnings per share (HEI only)	Basic earnings per share (EPS) is computed by dividing net income for common stock by the weighted-average number of common shares outstanding for the period. Diluted EPS is computed similarly, except that dilutive common shares for stock compensation is added to the denominator.
Impairment of long-lived assets and long-lived assets to be disposed of	The Company and the Utilities review long-lived assets and certain identifiable intangibles for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset to future undiscounted net cash flows expected to be generated by the asset. If such assets are considered to be impaired, the impairment to be recognized is measured by the amount by which the carrying amount of the assets exceeds the fair value of the assets. Assets to be disposed of are reported at the lower of the carrying amount or fair value, less costs to sell.
Recent accounting pronouncements	Credit losses . In June 2016, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2016-13, “Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments,” which replaces the incurred loss methodology with an expected loss methodology. The new methodology is referred to as the current expected credit loss (CECL) methodology and applies to financial assets subject to credit losses and measured at amortized cost and certain off-balance sheet credit exposures. This includes, but is not limited to loans, loan commitments and held-to-maturity securities. 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 has been 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 requires the use of an allowance to record the estimated losses (and subsequent recoveries). The Company adopted ASU No. 2016-13 on January 1, 2020 using the modified retrospective method with the cumulative effect of initially applying the amendments recognized in retained earnings as of January 1, 2020. The CECL models use a probability-of-default, loss given default and exposure at default methodology to estimate the expected credit losses. Within each model or calculation, loans are further segregated based on additional risk characteristics specific to that loan type, such as risk rating, FICO score, bankruptcy score, age of loan and collateral. The Company uses both internal and external historical data, as appropriate, and a blend of economic forecasts to estimate credit losses over a reasonable and supportable forecast period and then reverts to a longer-term historical loss experience to arrive at lifetime expected credit losses. The reversion period incorporates forward-looking expectations about repayments (including prepayments) as determined by the Company’s asset liability management system. The allowance for credit losses (ACL) is a material estimate of the Company. As a result of the change from an incurred loss model to a methodology that considers the credit loss over the expected life of the loan, on January 1, 2020, the Company recorded an adjustment of $21 million to increase the ACL, including a $2 million increase in the allowance for loan commitments, with a corresponding adjustment to reduce retained earnings by $15 million on an after-tax basis . The ACL is based on the composition, characteristics and quality of the loans and off balance sheet credit exposures as well as the prevailing economic conditions as of the adoption date. The increase in the ACL primarily relates to required reserves for residential mortgages and consumer loans, due to the requirement to estimate lifetime expected credit losses, with lower ACL requirements for commercial and commercial real estate loans due to their short-term nature. Based on the credit quality of the Company’s existing held-to-maturity and AFS investment securities portfolio, the Company did not recognize an ACL at adoption for those investments. The adoption of the new standard did not have a material impact to the Utilities’ customer and other accounts receivables and accrued unbilled revenue. Results for reporting periods beginning after January 1, 2020 are presented under ASU No. 2016-13 while prior period amounts continue to be reported in accordance with previously applicable GAAP (see Note 4). The table below summarizes the impact of the Company’s adoption of ASU No. 2016-13. January 1, 2020 (in thousands) Pre-ASU No. 2016-13 adoption Impact of ASU No. 2016-13 As reported under ASU No. 2016-13 HEI consolidated Loans held for investments, net 1 $ 5,067,821 $ (19,441) $ 5,048,380 Total assets 13,745,251 (19,441) 13,725,810 Deferred income taxes 379,324 (5,628) 373,696 Other 1 583,545 1,559 585,104 Total liabilities 11,430,698 (4,069) 11,426,629 Retained earnings 622,042 (15,372) 606,670 Total shareholders’ equity 2,280,260 (15,372) 2,264,888 Total liabilities and shareholders’ equity 13,745,251 (19,441) 13,725,810 1 The allowance for credit losses is classified in “Loans held for investments, net,” and the allowance for loan commitments is classified in “Other” liabilities in the Company’s consolidated balance sheets. Income Taxes . In December 2019, FASB issued ASU No. 2019-12, “Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes,” which removes specific exceptions to the general principles in Topic 740, improves financial statement preparers’ application of income tax-related guidance and simplifies GAAP under certain situations. ASU 2019-12 is effective for public business entities for fiscal years beginning after December 15, 2020, and interim periods within those fiscal years. The Company does not anticipate that the adoption of this ASU will have a material impact on its consolidated financial statements and related disclosures.
Reclassifications	Certain reclassifications of prior year amounts were made to conform to the current-year financial statement presentation. Reclassifications did not affect previously reported cash flows, net income or retained earnings.
Electric utility
Regulation by the Public Utilities Commission of the State of Hawaii (PUC)	The Utilities are regulated by the PUC and account for the effects of regulation under FASB ASC Topic 980, “Regulated Operations.” As a result, the Utilities’ financial statements reflect assets, liabilities, revenues and expenses based on current cost-based rate-making regulations (see Note 3—“Regulatory assets and liabilities”). Their continued accounting under ASC Topic 980 generally requires that rates are established by an independent, third-party regulator; rates are designed to recover the costs of providing service; and it is reasonable to assume that rates can be charged to, and collected from, customers. Management believes that the operations of the Utilities, including the impact of the newly approved PBR Framework, currently satisfy the criteria under ASC Topic 980.The rate schedules of the Utilities include energy costs recovery clauses (ECRCs) under which electric rates are adjusted for changes in the weighted-average price paid for fuel oil and certain components of purchased power, and the relative amounts of company-generated power and purchased power. The rate schedules also include purchased power adjustment clauses (PPACs) under which the remaining purchase power expenses are recovered through surcharge mechanisms. The amounts collected through the ECRCs and PPACs are required to be reconciled quarterly.
Accounts receivable	Accounts receivable are recorded at the invoiced amount. The Utilities generally assess a late payment charge on balances unpaid from the previous month. The allowance for doubtful accounts is the Utilities’ best estimate of the amount of probable credit losses in the Utilities’ existing accounts receivable.
Electric utility revenues	Revenues related to electric service are generally recorded when service is rendered and include revenues applicable to energy consumed in the accounting period but not yet billed to the customers. The Utilities also record revenue under a decoupling mechanism.
Repairs and maintenance costs	Repairs and maintenance costs for overhauls of generating units are generally expensed as they are incurred.
Allowance for funds used during construction (AFUDC)	AFUDC represents the estimated costs of debt (i.e., interest) and equity funds used to finance plant construction. AFUDC is credited on the statement of income and charged to construction in progress on the balance sheet. If a project under construction is delayed for an extended period of time, AFUDC on the delayed project may be stopped after assessing the causes of the delay and probability of recovery. The tax gross up of the allowance for equity funds used during construction is credited to income taxes on the statement of income and charged to a regulatory asset. This gross up, net of amortization of the regulatory asset, is reflected in income tax expense.
Asset retirement obligations (AROs)	AROs are accounted for in accordance with ASC 410-20, Asset Retirement Obligations. AROs are recognized at present value of expected costs to retire long-lived assets from service, provided a legal obligation exists and a reasonable estimate of the fair value and the settlement date can be made. In the subsequent period, the liability is accreted to its future value while the asset retirement cost is depreciated over the estimated useful life of the underlying asset. The Utilities’ recognition of AROs have no impact on earnings, as the cost of the AROs are recovered over the life of the asset through depreciation. AROs recognized by the Utilities relate to legal obligations with the retirement of plant and equipment, including removal of asbestos and other hazardous materials.
Bank (HEI only)
Investment securities	Investments in debt securities are classified as held-to-maturity (HTM), trading or available-for-sale (AFS). ASB determines the appropriate classification at the time of purchase. Debt securities that ASB intends to and has the ability to hold to maturity are classified as HTM securities and reported at amortized cost. Marketable debt securities that are bought and held principally for the purpose of selling them in the near term are classified as trading securities and reported at fair value, with unrealized gains and losses included in earnings. Marketable debt securities not classified as either HTM or trading securities are classified as AFS and reported at fair value. Unrealized gains and losses for AFS securities are excluded from earnings and reported on a net basis in accumulated other comprehensive income (AOCI) until realized. Interest income is recorded on an accrual basis. Discounts and premiums on securities are accreted or amortized into interest income using the interest method over the remaining contractual lives of the agency obligation securities and the estimated lives of the mortgage-backed securities adjusted for anticipated prepayments. ASB uses actual prepayment experience and estimates of future prepayments to determine the constant effective yield necessary to apply the interest method of income recognition. The discounts and premiums on the agency obligations portfolio are accreted or amortized on a prospective basis using expected contractual cash flows. The discounts and premiums on the mortgage-backed securities portfolio are accreted or amortized on a retrospective basis using changes in anticipated prepayments. This method requires a retrospective adjustment of the effective yield each time ASB changes the estimated life as if the new estimate had been known since the original acquisition date of the securities. Estimates of future prepayments are based on the underlying collateral characteristics and historic or projected prepayment behavior of each security. The specific identification method is used in determining realized gains and losses on the sales of securities. AFS debt securities with unrealized losses are reviewed quarterly. ASB will first assess whether it intends to sell, or it is more likely than not that it will be required to sell the security before recovery of its amortized cost basis. If either criteria is met, the security’s amortized cost basis is written down to fair value through income. For AFS securities that do not meet the aforementioned criteria, ASB evaluates whether the decline in fair value is the result of a credit loss or other factors. The determination of whether or not a credit loss exists is based on consideration of the cash flows expected to be collected from the debt security. ASB develops these expectations after considering various factors such as agency ratings, the financial condition of the issuer, payment history, payment structure of the security, industry and market conditions, underlying collateral and other factors which may be relevant based on the facts and circumstances pertaining to individual securities. If this assessment indicates that a credit loss exists, the present value of cash flows expected to be collected from the security are compared to the amortized cost basis of the security. If the present value of cash flows expected to be collected is less than the amortized cost basis, a credit loss exists and an allowance for credit losses is recorded for the credit loss, limited by the amount that the fair value is less than the amortized cost basis. Any impairment that has not been recorded through an allowance for credit losses is recognized in other comprehensive income. Changes in the allowance for credit losses are recorded as a provision for (or reversal of) credit losses. Losses are charged against the allowance when management believes the uncollectibility of an AFS security is confirmed or when either of the criteria regarding intent or requirement to sell is met. As of December 31, 2020, 2019 and 2018, there was no indicated impairment as ASB expects to collect the contractual cash flows for these investments. Held-to-maturity debt securities are assessed periodically to determine if a valuation allowance is necessary to absorb credit losses expected to occur over the remaining contractual life of the securities. The carrying amount of held-to-maturity debt securities is presented net of the valuation allowance for credit losses when such an allowance is deemed necessary. Stock in FHLB is carried at cost and is reviewed at least quarterly for impairment, with valuation adjustments recognized in noninterest income.
Loans	ASB carries loans at amortized cost less the allowance for credit losses, loan origination fees (net of direct loan origination costs), commitment fees and purchase premiums and discounts. Interest on loans is credited to income as it is earned. Discounts and premiums are accreted or amortized over the life of the loans using the interest method.Loan origination fees (net of direct loan origination costs) are deferred and recognized as an adjustment in yield over periods not exceeding the contractual life of the loan using the interest method or taken into income when the loan is paid off or sold. Nonrefundable commitment fees (net of direct loan origination costs, if applicable) received for commitments to originate or purchase loans are deferred and, if the commitment is exercised, recognized as an adjustment of yield over the life of the loan using the interest method. Nonrefundable commitment fees received for which the commitment expires unexercised are recognized as income upon expiration of the commitment.
Loans held for sale and gain on sale of loans	Loans held for sale are stated at the lower of cost or estimated fair value on an aggregate basis. Premiums, discounts and net deferred loan fees are not amortized while a loan is classified as held for sale. A sale is recognized only when the consideration received is other than beneficial interests in the assets sold and control over the assets is transferred irrevocably to the buyer. Gains or losses on sales of loans are recognized at the time of sale and are determined by the difference between the net sales proceeds and the allocated basis of the loans sold.
Allowance for credit losses	The ACL represents management’s estimate of expected credit losses over the expected contractual life of the related loans as of the balance sheet date. Contractual terms are adjusted for expected prepayments but are not extended for expected extensions, renewals or modifications except in circumstances where ASB reasonably expects to execute a troubled debt restructuring with the borrower or where certain extension or renewal options are embedded in the original contract and not unconditionally cancellable by the bank.Accrued interest receivables on loans are presented in the Consolidated Financial Statements as a component of other assets. When accrued interest is deemed to be uncollectible (typically when a loan is placed on nonaccrual status), interest income is reversed against interest income on loans. ASB follows established policies for placing loans on nonaccrual status, so uncollectible accrued interest receivable is reversed in a timely manner. As a result, the bank has elected not to measure an allowance for credit losses for accrued interest receivables. Credit losses are charged and recoveries are credited to the ACL. The ACL is maintained at a level the Bank considers to be adequate and is based on ongoing assessments and evaluations of the collectability of loans. The bank’s expected credit loss models consider historical credit loss experience, current market and economic conditions, and forecasted changes in market and economic conditions if such forecasts are considered reasonable and supportable. Generally, the Bank considers its forecasts to be reasonable and supportable for a period of up to a year from the estimation date. For periods beyond the reasonable and supportable forecast period, expected credit losses are estimated by reverting to historical loss information without adjustment for changes in economic conditions. The Bank evaluates the length of its reasonable and supportable forecast period, its reversion period and reversion methodology at least annually, or more often if warranted by economic conditions or other circumstances. The Bank’s methodology for determining the ACL includes an estimate of expected credit losses on a collective basis for groups of loans with similar risk characteristics and specific allowances for loans which are individually evaluated. ASB disaggregates its portfolio loans into portfolio segments for purposes of determining the allowance for credit losses. Commercial, commercial real estate, and commercial construction loans are defined as non-homogeneous loans and ASB utilizes a risk rating system for evaluating the credit quality of the loans. Non-homogeneous loans are also categorized into the regulatory asset quality classifications—Pass, Special Mention, Substandard, Doubtful, and Loss based on credit quality. ASB utilizes a numerical-based, risk rating “PD Model” that takes into consideration fiscal year-end financial information of the borrower and identified financial attributes including retained earnings, operating cash flows, interest coverage, liquidity and leverage that demonstrate a strong correlation with default to assign default probabilities at the borrower level. In addition, a loss given default (LGD) value is assigned to each loan to measure loss in the event of default based on loan specific features such as collateral that mitigates the amount of loss in the event of default. Residential, consumer and credit scored business loans are considered homogeneous loans, which are typically underwritten based on common, uniform standards. For the homogeneous portfolio, the quality of the loan is best indicated by the repayment performance of an individual borrower. ASB supplements performance data with external credit bureau data and credit scores such as the Fair Isaac Corporation (FICO) score on a quarterly basis. ASB has built portfolio loss models for each major segment based on the combination of internal and external data to predict the probability of default at the loan level. The Bank also considers qualitative factors in determining the ACL. Qualitative factors are used to capture characteristics in the portfolio that impact expected credit losses but that are not fully captured within the bank’s expected credit loss models. These include but are not limited to adjustments for changes in policies or procedures in underwriting, monitoring or collections, economic conditions, portfolio mix, lending and risk management personnel, results of internal audit and quality control reviews, collateral values and any concentrations of credit. . The reserve for unfunded commitments is maintained at a level believed by management to cover expected losses related to unfunded credit facilities and is included in accounts payable and other liabilities in the consolidated balance sheets. The determination of the adequacy of the reserve is based upon an evaluation of the unfunded credit facilities, including an assessment of historical commitment utilization experience, credit risk grading and historical loss rates. This process takes into consideration the same risk elements that are analyzed in the determination of the adequacy of the allowance for credit losses, as discussed above. Net adjustments to the reserve for unfunded commitments are included in the provision for credit losses in the consolidated statements of income. The allowance for credit losses is based on currently available information and historical experience, and future adjustments may be required from time to time to the allowance for credit losses based on new information and changes that occur (e.g., due to changes in economic conditions, particularly in Hawaii). Actual losses could differ from management’s estimates, and these differences and subsequent adjustments could be material.
Nonperforming loans	Loans are generally placed on nonaccrual status when contractually past due 90 days or more, or earlier if the probability of collection is insufficient to warrant further accrual. All interest that is accrued but not collected is reversed. A loan may be returned to accrual status if (i) principal and interest payments have been brought current and repayment of the remaining contractual principal and interest is expected to be made, (ii) the loan has otherwise become well-secured and in the process of collection, or (iii) the borrower has been making regularly scheduled payments in full for the prior six months and it is reasonably assured that the loan will be brought fully current within a reasonable period. Cash receipts on nonaccruing loans are generally applied to reduce the unpaid principal balance. Loans considered to be uncollectible are charged-off against the allowance for credit losses. The amount and timing of charge-offs on loans includes consideration of the loan type, length of delinquency, insufficiency of collateral value, lien priority and the overall financial condition of the borrower. Recoveries on loans previously charged-off are credited back to the allowance for credit losses. Loans that have been charged-off against the allowance for credit losses are periodically monitored to evaluate whether further adjustments to the allowance are necessary. Loans in the commercial and commercial real estate portfolio are charged-off when the loan is risk rated “Doubtful” or “Loss.” The loan or a portion thereof is determined to be uncollectible after considering the borrower’s overall financial condition and collateral deficiency. A commercial or commercial real estate loan is considered uncollectible when: (a) the borrower is delinquent in principal or interest 90 days or more; (b) significant improvement in the borrower’s repayment capacity is doubtful; and/or (c) collateral value is insufficient to cover outstanding indebtedness and no other viable assets or repayment sources exist. Loans in the residential mortgage and home equity portfolios are charged-off when the loan or a portion thereof is determined to be uncollectible after considering the borrower’s overall financial condition and collateral deficiency. Such loan is considered uncollectible when: (a) the borrower is delinquent in principal or interest 180 days or more; (b) it is probable that collateral value is insufficient to cover outstanding indebtedness and no other viable assets or repayment sources exist; (c) notification of the borrower’s bankruptcy is received or the borrower’s debt is discharged in bankruptcy and the loan is not reaffirmed; or (d) in cases where ASB is in a subordinate position to other debt, the senior lien holder has foreclosed and ASB’s junior lien is extinguished. Other consumer loans are generally charged-off when the balance becomes 120 days delinquent.
Loans modified in a troubled debt restructuring	Loans are considered to have been modified in a troubled debt restructuring (TDR) when, due to a borrower’s financial difficulties, ASB makes concessions to the borrower that it would not otherwise consider for a non-troubled borrower. Modifications may include interest rate reductions, interest only payments for an extended period of time, protracted terms such as amortization and maturity beyond the customary length of time found in the normal market place, and other actions intended to minimize economic loss and to provide alternatives to foreclosure or repossession of collateral. Generally, a nonaccrual loan that has been modified in a TDR remains on nonaccrual status until the borrower has demonstrated sustained repayment performance for a period of six
Real estate acquired in settlement of loans	ASB records real estate acquired in settlement of loans at fair value, less estimated selling expenses. ASB obtains appraisals based on recent comparable sales to assist management in estimating the fair value of real estate acquired in settlement of loans. Subsequent declines in value are charged to expense through a valuation allowance. Costs related to holding real estate are charged to operations as incurred.
Goodwill	Goodwill is initially recorded as the excess of the purchase price over the fair value of the net assets acquired in a business combination and is subsequently evaluated at least annually for impairment during the fourth quarter. At December 31, 2020 and 2019, the amount of goodwill was $82.2 million. The goodwill relates to ASB and is the Company’s only intangible asset with an indefinite useful life.To determine if there was an impairment to the book value of goodwill pertaining to ASB, the fair value of ASB was estimated using a valuation method based on the market and income approaches. The market approach considers publicly traded financial institutions and measures the institutions’ market values as a multiple to (1) net income and (2) tangible book equity. The market approach also looks at sale transactions to determine the fair value under this approach. The mean market value multiples for net income and tangible book equity from the selected institutions were applied to ASB’s last twelve months’ net income, next year’s net income and tangible book equity to calculate ASB’s fair value using the market approach. Industry sale transactions for 2019 and 2020 were reviewed and the mean market capitalization to earnings and tangible book value from the financial institutions in the sales transactions were used to calculate the fair value under this approach. The income approach uses a discounted cash flow method to value a company on a going concern basis and is based on the concept that the future benefits derived from a particular company can be measured by its sustainable after-tax cash flows in the future. ASB used its forecasted net income and estimated cost savings if the bank were acquired and applied a discount rate to calculate its discounted cash flows. A capitalization of earnings method was used to calculate a terminal value for the discounted cash flow method. The income approach was weighted 75%, the publicly traded company valuation method was weighted 20% and the sale transaction valuation method was weighted 5%. More weight was given to the income approach as this approach uses the projected performance of ASB in the stressed environment and would be more indicative of the current fair value of the Bank.
Mortgage banking	Mortgage loans held for sale are stated at the lower of cost or estimated fair value on an aggregate basis. Premiums, discounts and net deferred loan fees are not amortized while a loan is classified as held-for-sale. A sale is recognized only when the consideration received is other than beneficial interests in the assets sold and control over the assets is transferred irrevocably to the buyer. Gains or losses on sales of loans are recognized at the time of sale and are determined by the difference between the net sales proceeds and the allocated basis of the loans sold. ASB is obligated to subsequently repurchase a loan if the purchaser discovers a standard representation or warranty violation such as noncompliance with eligibility requirements, customer fraud or servicing violations. This primarily occurs during a loan file review. ASB considers and records a reserve for loan repurchases if appropriate. ASB recognizes a mortgage servicing asset when a mortgage loan is sold with servicing rights retained. This mortgage servicing right (MSR) is initially capitalized at its presumed 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 assets or liabilities are included as a component of gain on sale of loans. Under ASC Topic 860, “Transfers and Servicing,” ASB amortizes the MSRs in proportion to and over the period of estimated net servicing income and assess for impairment at each reporting date. 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 primarily 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. 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. Because observable market prices with exact terms and conditions may not be readily available, ASB compares the fair value of MSRs to an estimated value calculated by an independent third-party on a semi-annual basis. The third-party relies on both published and unpublished sources of market related assumptions and its own experience and expertise to arrive at a value. ASB uses the third-party value only to assess the reasonableness of fair value generated by the valuation model. 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. Loan servicing fee income represents income earned for servicing mortgage loans owned by investors. It includes mortgage servicing fees and other ancillary servicing income, net of guaranty fees. Servicing fees are generally calculated on the outstanding principal balances of the loans serviced and are recorded as income when earned.
Tax credit investments	ASB invests in limited liability entities formed to operate qualifying affordable housing projects. The affordable housing investments provide tax benefits to investors in the form of tax deductions from operating losses and tax credits. As a limited partner, ASB has no significant influence over the operations. These investments are initially recorded at the initial capital contribution with a liability recognized for the commitment to contribute additional capital over the term of the investment. ASB uses the proportional amortization method of accounting for its investments. Under the proportional amortization method, ASB amortizes the cost of its investments in proportion to the tax credits and other tax benefits it receives. The amortization, tax credits and tax benefits are reported as a component of income tax expense. For these limited liability entities, ASB assesses whether it is the primary beneficiary of the limited liability entity, which is a variable interest entity (VIE). The primary beneficiary of a VIE is determined to be the party that meets both of the following criteria: (i) has the power to make decisions that most significantly affect the economic performance of the VIE; and (ii) has the obligation to absorb losses or the right to receive benefits that in either case could potentially be significant to the VIE. Generally, ASB, as a limited partner, is not deemed to be the primary beneficiary as it does not meet the power criterion, i.e., no power to direct the activities of a VIE that most significantly impact the VIE’s economic performance and no direct ability to unilaterally remove the general partner. All tax credit investments are evaluated for potential impairment at least annually, or more frequently, when events or conditions indicate that it is deemed probable that ASB will not recover its investment. If an investment is determined to be

Summary of significant accoun_3

Summary of significant accounting policies (Tables)	12 Months Ended
	Dec. 31, 2020
Accounting Policies [Abstract]
Schedule of impact of adoption of new accounting principle	The table below summarizes the impact of the Company’s adoption of ASU No. 2016-13. January 1, 2020 (in thousands) Pre-ASU No. 2016-13 adoption Impact of ASU No. 2016-13 As reported under ASU No. 2016-13 HEI consolidated Loans held for investments, net 1 $ 5,067,821 $ (19,441) $ 5,048,380 Total assets 13,745,251 (19,441) 13,725,810 Deferred income taxes 379,324 (5,628) 373,696 Other 1 583,545 1,559 585,104 Total liabilities 11,430,698 (4,069) 11,426,629 Retained earnings 622,042 (15,372) 606,670 Total shareholders’ equity 2,280,260 (15,372) 2,264,888 Total liabilities and shareholders’ equity 13,745,251 (19,441) 13,725,810 1 The allowance for credit losses is classified in “Loans held for investments, net,” and the allowance for loan commitments is classified in “Other” liabilities in the Company’s consolidated balance sheets.
Summary of amounts in income tax expense related to investments in qualifying affordable housing projects	The table below summarizes the amounts in income tax expense related to ASB’s LIHTC investments: Years ended December 31 2020 2019 2018 (in millions) Amounts in income taxes related to low-income housing tax credit investments Amortization recognized in the provision for income taxes $ (9.6) $ (7.9) $ (7.7) Tax credits and other tax benefits recognized in the provision for income taxes 13.7 11.9 10.9 Net benefit to income tax expense $ 4.1 $ 4.0 $ 3.2

Segment financial information (

Segment financial information (Tables)	12 Months Ended
	Dec. 31, 2020
Segment Reporting [Abstract]
Schedule of segment financial information	Segment financial information was as follows: (in thousands) Electric utility Bank Other Total 2020 Revenues from external customers $ 2,265,281 $ 313,511 $ 983 $ 2,579,775 Intersegment revenues (eliminations) 39 — (39) — Revenues 2,265,320 313,511 944 2,579,775 Depreciation and amortization 256,479 29,349 4,950 290,778 Interest expense, net 67,794 11,114 20,900 99,808 Income (loss) before income taxes 211,753 69,271 (40,400) 240,624 Income taxes (benefit) 40,418 11,688 (11,196) 40,910 Net income (loss) 171,335 57,583 (29,204) 199,714 Preferred stock dividends of subsidiaries 1,995 — (105) 1,890 Net income (loss) for common stock 169,340 57,583 (29,099) 197,824 Capital expenditures 1 350,864 12,203 20,828 383,895 Assets (at December 31, 2020) 6,457,373 8,396,533 150,101 15,004,007 2019 Revenues from external customers $ 2,545,865 $ 327,917 $ 166 $ 2,873,948 Intersegment revenues (eliminations) 77 — (77) — Revenues 2,545,942 327,917 89 2,873,948 Depreciation and amortization 245,362 28,675 4,076 278,113 Interest expense, net 70,842 18,440 20,057 109,339 Income (loss) before income taxes 197,140 112,034 (37,765) 271,409 Income taxes (benefit) 38,305 23,061 (9,729) 51,637 Net income (loss) 158,835 88,973 (28,036) 219,772 Preferred stock dividends of subsidiaries 1,995 — (105) 1,890 Net income (loss) for common stock 156,840 88,973 (27,931) 217,882 Capital expenditures 1 419,898 24,175 13,447 457,520 Assets (at December 31, 2019) 6,388,682 7,233,017 123,552 13,745,251 2018 Revenues from external customers $ 2,546,472 $ 314,275 $ 102 $ 2,860,849 Intersegment revenues (eliminations) 53 — (53) — Revenues 2,546,525 314,275 49 2,860,849 Depreciation and amortization 230,228 21,443 3,958 255,629 Interest expense, net 73,348 15,539 15,329 104,216 Income (loss) before income taxes 180,426 106,578 (32,543) 254,461 Income taxes (benefit) 34,778 24,069 (8,050) 50,797 Net income (loss) 145,648 82,509 (24,493) 203,664 Preferred stock dividends of subsidiaries 1,995 — (105) 1,890 Net income (loss) for common stock 143,653 82,509 (24,388) 201,774 Capital expenditures 1 415,264 72,666 18,840 537,369 Assets (at December 31, 2018) 5,967,503 7,027,894 108,654 13,104,051

Electric utility segment (Table

Electric utility segment (Tables)	12 Months Ended
	Dec. 31, 2020
Electric utility subsidiary
Schedule of consolidating statements of income	Statements of Income and Comprehensive Income Data Years ended December 31 2020 2019 2018 (in thousands) Interest and dividend income Interest and fees on loans $ 214,134 $ 233,632 $ 220,463 Interest and dividends on investment securities 30,529 32,922 37,762 Total interest and dividend income 244,663 266,554 258,225 Interest expense Interest on deposit liabilities 10,654 16,830 13,991 Interest on other borrowings 460 1,610 1,548 Total interest expense 11,114 18,440 15,539 Net interest income 233,549 248,114 242,686 Provision for credit losses 50,811 23,480 14,745 Net interest income after provision for credit losses 182,738 224,634 227,941 Noninterest income Fees from other financial services 16,447 19,275 18,937 Fee income on deposit liabilities 16,059 20,877 21,311 Fee income on other financial products 6,381 6,507 7,052 Bank-owned life insurance 6,483 7,687 5,057 Mortgage banking income 23,734 4,943 1,493 Gain on sale of real estate — 10,762 — Gain on sale of investment securities, net 9,275 653 — Other income, net (256) 2,074 2,200 Total noninterest income 78,123 72,778 56,050 Noninterest expense Compensation and employee benefits 104,443 103,009 98,387 Occupancy 21,573 21,272 17,073 Data processing 14,769 15,306 14,268 Services 11,121 10,239 10,847 Equipment 9,001 8,760 7,186 Office supplies, printing and postage 4,623 5,512 6,134 Marketing 3,435 4,490 3,567 FDIC insurance 2,342 1,204 2,713 Other expense 1 20,283 15,586 17,238 Total noninterest expense 191,590 185,378 177,413 Income before income taxes 69,271 112,034 106,578 Income taxes 11,688 23,061 24,069 Net income 57,583 88,973 82,509 Other comprehensive income (loss), net of taxes 23,608 29,406 (7,119) Comprehensive income $ 81,191 $ 118,379 $ 75,390 1 2020 includes approximately $5.1 million of certain direct and incremental COVID-19 related costs. For 2020, these costs, which have been recorded in Other expense , include $2.5 million of compensation expense and $2.0 million of enhanced cleaning and sanitation costs. Reconciliation to amounts per HEI Consolidated Statements of Income*: Years ended December 31 2020 2019 2018 (in thousands) Interest and dividend income $ 244,663 $ 266,554 $ 258,225 Noninterest income 78,123 72,778 56,050 Less: Gain on sale of real estate — 10,762 — Less: Gain on sale of investment securities, net 9,275 653 — *Revenues-Bank 313,511 327,917 314,275 Total interest expense 11,114 18,440 15,539 Provision for credit losses 50,811 23,480 14,745 Noninterest expense 191,590 185,378 177,413 Less: Retirement defined benefits expense (credit)—other than service costs 1,813 (472) 1,657 Add: Gain on sale of real estate — 10,762 — *Expenses-Bank 251,702 217,008 206,040 *Operating income-Bank 61,809 110,909 108,235 Add back: Retirement defined benefits expense (credit)—other than service costs 1,813 (472) 1,657 Add back: Gain on sale of investment securities, net 9,275 653 — Income before income taxes $ 69,271 $ 112,034 $ 106,578
Schedule of consolidating balance sheets	Balance Sheets Data December 31 2020 2019 (in thousands) Assets Cash and due from banks $ 178,422 $ 129,770 Interest-bearing deposits 114,304 48,628 Cash and cash equivalents 292,726 178,398 Investment securities Available-for-sale, at fair value 1,970,417 1,232,826 Held-to-maturity, at amortized cost (fair value of $229,963 and $143,467 at December 31, 2020 and 2019, respectively) 226,947 139,451 Stock in Federal Home Loan Bank, at cost 8,680 8,434 Loans held for investment 5,333,843 5,121,176 Allowance for credit losses (101,201) (53,355) Net loans 5,232,642 5,067,821 Loans held for sale, at lower of cost or fair value 28,275 12,286 Other 554,656 511,611 Goodwill 82,190 82,190 Total assets $ 8,396,533 $ 7,233,017 Liabilities and shareholder’s equity Deposit liabilities–noninterest-bearing $ 2,598,500 $ 1,909,682 Deposit liabilities–interest-bearing 4,788,457 4,362,220 Other borrowings 89,670 115,110 Other 183,731 146,954 Total liabilities 7,660,358 6,533,966 Commitments and contingencies Common stock 1 1 Additional paid in capital 351,758 349,453 Retained earnings 369,470 358,259 Accumulated other comprehensive income (loss), net of taxes Net unrealized gains (losses) on securities $ 19,986 $ 2,481 Retirement benefit plans (5,040) 14,946 (11,143) (8,662) Total shareholder’s equity 736,175 699,051 Total liabilities and shareholder’s equity $ 8,396,533 $ 7,233,017 December 31 2020 2019 (in thousands) Other assets Bank-owned life insurance $ 163,265 $ 157,465 Premises and equipment, net 206,134 204,449 Accrued interest receivable 24,616 19,365 Mortgage servicing rights 10,020 9,101 Low-income housing investments 83,435 66,302 Other 67,186 54,929 $ 554,656 $ 511,611 Other liabilities Accrued expenses $ 62,694 $ 45,822 Federal and state income taxes payable 6,582 14,996 Cashier’s checks 38,011 23,647 Advance payments by borrowers 10,207 10,486 Other 66,237 52,003 $ 183,731 $ 146,954
Hawaiian Electric Company, Inc. and Subsidiaries
Electric utility subsidiary
Schedule of regulatory assets	Regulatory assets were as follows: December 31 2020 2019 (in thousands) Retirement benefit plans (balance primarily varies with plans’ funded statuses) $ 592,644 $ 554,485 Income taxes (1-55 years) 96,171 102,612 Decoupling revenue balancing account and RAM (1-2 years) 10,432 — Unamortized expense and premiums on retired debt and equity issuances (1-19 years; 1-18 years remaining) 8,654 10,228 Vacation earned, but not yet taken (1 year) 15,665 12,535 COVID-19 related costs (to be determined by PUC) 18,032 — Other (1-39 years remaining) 25,110 35,220 Total regulatory assets $ 766,708 $ 715,080 Included in: Current assets $ 30,435 $ 30,710 Long-term assets 736,273 684,370 Total regulatory assets $ 766,708 $ 715,080
Schedule of regulatory liabilities	Regulatory liabilities were as follows: December 31 2020 2019 (in thousands) Cost of removal in excess of salvage value (1-79 years) $ 541,730 $ 521,977 Income taxes (1-55 years) 360,426 386,990 Decoupling revenue balancing account and RAM (1-2 years) 1,957 16,370 Retirement benefit plans (balance primarily varies with plans’ funded statuses) 29,759 21,707 Other (1-18 years remaining) 25,914 25,266 Total regulatory liabilities $ 959,786 $ 972,310 Included in: Current liabilities $ 37,301 $ 30,724 Long-term liabilities 922,485 941,586 Total regulatory liabilities $ 959,786 $ 972,310
Schedule of voluntary liquidation and redemption prices of cumulative preferred stock	The following series of cumulative preferred stock are redeemable only at the option of the respective company at the following prices in the event of voluntary liquidation or redemption: December 31, 2020 Voluntary Redemption Series C, D, E, H, J and K (Hawaiian Electric) $ 20 $ 21 I (Hawaiian Electric) 20 20 G (Hawaii Electric Light) 100 100 H (Maui Electric) 100 100
Schedule of purchases from all IPPs	Purchases from all IPPs were as follows: Years ended December 31 2020 2019 2018 (in millions) Kalaeloa $ 149 $ 214 $ 216 AES Hawaii 133 139 140 HPOWER 70 76 69 Hamakua Energy 50 68 56 Puna Geothermal Venture 1 — 15 Wind IPPs 105 95 107 Solar IPPs 57 36 29 Other IPPs 1 4 5 7 Total IPPs $ 569 $ 633 $ 639 1 Includes hydro power and other PPAs
Schedule of changes in asset retirement obligation	Changes to the ARO liability included in “Other liabilities” on Hawaiian Electric’s balance sheet were as follows: (in thousands) 2020 2019 Balance, January 1 $ 10,324 $ 8,426 Accretion expense 405 312 Liabilities incurred — 1,594 Liabilities settled (37) (8) Balance, December 31 $ 10,692 $ 10,324
Schedule of net annual incremental amounts proposed to be collected (refunded)	The net annual incremental amounts to be collected (refunded) from June 1, 2020 through May 31, 2021 are as follows: (in millions) Hawaiian Electric Hawaii Electric Light Maui Electric Total 2020 Annual incremental RAM adjusted revenues $ 20.6 $ 3.2 $ 5.7 $ 29.5 Annual change in accrued RBA balance as of December 31, 2019 (and associated revenue taxes) which incorporates MPIR recovery (46.5) (9.9) (11.0) (67.4) Incremental Performance Incentive Mechanisms (net) 2.2 (0.1) (0.1) 2.0 Net annual incremental amount to be refunded under the tariffs $ (23.7) $ (6.8) $ (5.4) $ (35.9)
Schedule of consolidating statements of income	Consolidating statement of income Year ended December 31, 2020 (in thousands) Hawaiian Electric Hawaii Electric Light Maui Electric Other subsidiaries Consolidating adjustments Hawaiian Electric Consolidated Revenues $ 1,608,305 334,221 323,430 — (636) [1] $ 2,265,320 Expenses Fuel oil 354,087 72,202 88,985 — — 515,274 Purchased power 446,672 73,120 48,957 — — 568,749 Other operation and maintenance 311,781 73,746 88,665 — — 474,192 Depreciation 151,387 39,041 32,305 — — 222,733 Taxes, other than income taxes 154,191 31,181 30,450 — — 215,822 Total expenses 1,418,118 289,290 289,362 — — 1,996,770 Operating income 190,187 44,931 34,068 — (636) 268,550 Allowance for equity funds used during construction 7,335 543 890 — — 8,768 Equity in earnings of subsidiaries 47,504 — — — (47,504) [2] — Retirement defined benefits expense—other than service costs (1,294) 672 (141) — — (763) Interest expense and other charges, net (48,775) (10,004) (9,651) — 636 [1] (67,794) Allowance for borrowed funds used during construction 2,540 160 292 — — 2,992 Income before income taxes 197,497 36,302 25,458 — (47,504) 211,753 Income taxes 27,077 8,275 5,066 — — 40,418 Net income 170,420 28,027 20,392 — (47,504) 171,335 Preferred stock dividends of subsidiaries — 534 381 — — 915 Net income attributable to Hawaiian Electric 170,420 27,493 20,011 — (47,504) 170,420 Preferred stock dividends of Hawaiian Electric 1,080 — — — — 1,080 Net income for common stock $ 169,340 $ 27,493 $ 20,011 $ — $ (47,504) $ 169,340 Consolidating statement of income Year ended December 31, 2019 (in thousands) Hawaiian Electric Hawaii Electric Light Maui Electric Other subsidiaries Consolidating adjustments Hawaiian Electric Consolidated Revenues $ 1,803,698 364,590 378,202 — (548) [1] $ 2,545,942 Expenses Fuel oil 494,728 84,565 141,416 — — 720,709 Purchased power 494,215 90,989 48,052 — — 633,256 Other operation and maintenance 319,771 76,091 85,875 — — 481,737 Depreciation 143,470 41,812 30,449 — — 215,731 Taxes, other than income taxes 170,979 33,787 35,365 — — 240,131 Total expenses 1,623,163 327,244 341,157 — — 2,291,564 Operating income 180,535 37,346 37,045 — (548) 254,378 Allowance for equity funds used during construction 9,955 816 1,216 — — 11,987 Equity in earnings of subsidiaries 43,167 — — — (43,167) [2] — Retirement defined benefits expense—other than service costs (2,287) (422) (127) — — (2,836) Interest expense and other charges, net (51,199) (10,741) (9,450) — 548 [1] (70,842) Allowance for borrowed funds used during construction 3,666 342 445 — — 4,453 Income before income taxes 183,837 27,341 29,129 — (43,167) 197,140 Income taxes 25,917 5,990 6,398 — — 38,305 Net income 157,920 21,351 22,731 — (43,167) 158,835 Preferred stock dividends of subsidiaries — 534 381 — — 915 Net income attributable to Hawaiian Electric 157,920 20,817 22,350 — (43,167) 157,920 Preferred stock dividends of Hawaiian Electric 1,080 — — — — 1,080 Net income for common stock $ 156,840 $ 20,817 $ 22,350 — (43,167) $ 156,840 Consolidating statement of income Year ended December 31, 2018 (in thousands) Hawaiian Electric Hawaii Electric Light Maui Electric Other subsidiaries Consolidating adjustments Hawaiian Electric Consolidated Revenues $ 1,802,550 375,493 368,700 — (218) [1] $ 2,546,525 Expenses Fuel oil 523,706 90,792 146,030 — — 760,528 Purchased power 494,450 95,838 49,019 — — 639,307 Other operation and maintenance 313,346 70,396 77,749 — — 461,491 Depreciation 137,410 40,235 25,981 — — 203,626 Taxes, other than income taxes 170,363 34,850 34,699 — — 239,912 Total expenses 1,639,275 332,111 333,478 — — 2,304,864 Operating income 163,275 43,382 35,222 — (218) 241,661 Allowance for equity funds used during construction 9,208 478 1,191 — — 10,877 Equity in earnings of subsidiaries 45,393 — — — (45,393) [2] — Retirement defined benefits expense—other than service costs (2,649) (417) (565) — — (3,631) Interest expense and other charges, net (52,180) (11,836) (9,550) — 218 [1] (73,348) Allowance for borrowed funds used during construction 4,019 276 572 — — 4,867 Income before income taxes 167,066 31,883 26,870 — (45,393) 180,426 Income taxes 22,333 6,868 5,577 — — 34,778 Net income 144,733 25,015 21,293 — (45,393) 145,648 Preferred stock dividends of subsidiaries — 534 381 — — 915 Net income attributable to Hawaiian Electric 144,733 24,481 20,912 — (45,393) 144,733 Preferred stock dividends of Hawaiian Electric 1,080 — — — — 1,080 Net income for common stock $ 143,653 24,481 20,912 — (45,393) $ 143,653
Schedule of consolidating statements of comprehensive income	Consolidating statement of comprehensive income Year ended December 31, 2020 (in thousands) Hawaiian Electric Hawaii Electric Light Maui Electric Other subsidiaries Consolidating Hawaiian Electric Net income for common stock $ 169,340 27,493 20,011 — (47,504) $ 169,340 Other comprehensive income (loss), net of taxes: Retirement benefit plans: Net losses arising during the period, net of tax benefits (63,050) (9,424) (10,897) — 20,321 [1] (63,050) Adjustment for amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of tax benefits 21,550 3,179 2,763 — (5,942) [1] 21,550 Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of taxes 39,860 6,025 8,000 — (14,025) [1] 39,860 Other comprehensive loss, net of tax benefits (1,640) (220) (134) — 354 (1,640) Comprehensive income attributable to common shareholder $ 167,700 27,273 19,877 — (47,150) $ 167,700 Consolidating statement of comprehensive income Year ended December 31, 2019 (in thousands) Hawaiian Electric Hawaii Electric Light Maui Electric Other subsidiaries Consolidating adjustments Hawaiian Electric Net income for common stock $ 156,840 20,817 22,350 — (43,167) $ 156,840 Other comprehensive income (loss), net of taxes: Retirement benefit plans: Net gains (losses) arising during the period, net of taxes 5,249 373 (204) — (169) [1] 5,249 Adjustment for amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of tax benefits 9,550 1,455 1,182 — (2,637) [1] 9,550 Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of taxes (16,177) (1,840) (1,152) — 2,992 [1] (16,177) Other comprehensive loss, net of tax benefits (1,378) (12) (174) — 186 (1,378) Comprehensive income attributable to common shareholder $ 155,462 20,805 22,176 — (42,981) $ 155,462 Consolidating statement of comprehensive income Year ended December 31, 2018 (in thousands) Hawaiian Electric Hawaii Electric Light Maui Electric Other subsidiaries Consolidating adjustments Hawaiian Electric Net income for common stock $ 143,653 24,481 20,912 — (45,393) $ 143,653 Other comprehensive income (loss), net of taxes: Retirement benefit plans: Net losses arising during the period, net of tax benefits (26,019) (6,090) (5,004) — 11,094 [1] (26,019) Adjustment for amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of tax benefits 19,012 2,819 2,423 — (5,242) [1] 19,012 Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of taxes 8,325 3,305 2,788 — (6,093) [1] 8,325 Other comprehensive income, net of taxes 1,318 34 207 — (241) 1,318 Comprehensive income attributable to common shareholder $ 144,971 24,515 21,119 — (45,634) $ 144,971
Schedule of consolidating balance sheets	Consolidating balance sheet December 31, 2020 (in thousands) Hawaiian Electric Hawaii Electric Light Maui Electric Other subsidiaries Consolidating Hawaiian Electric Assets Property, plant and equipment Utility property, plant and equipment Land $ 42,411 5,606 3,594 — — $ 51,611 Plant and equipment 4,960,470 1,352,885 1,195,988 — — 7,509,343 Less accumulated depreciation (1,677,256) (597,606) (544,217) — — (2,819,079) Construction in progress 143,616 13,043 31,683 — — 188,342 Utility property, plant and equipment, net 3,469,241 773,928 687,048 — — 4,930,217 Nonutility property, plant and equipment, less accumulated depreciation 5,306 115 1,532 — — 6,953 Total property, plant and equipment, net 3,474,547 774,043 688,580 — — 4,937,170 Investment in wholly-owned subsidiaries, at equity 626,890 — — — (626,890) [2] — Current assets Cash and cash equivalents 42,205 3,046 2,032 77 — 47,360 Restricted cash 15,966 — — — — 15,966 Advances to affiliates 26,700 — — — (26,700) [1] — Customer accounts receivable, net 102,736 23,989 21,107 — — 147,832 Accrued unbilled revenues, net 73,628 13,631 13,777 — — 101,036 Other accounts receivable, net 17,984 3,028 2,856 — (16,195) [1] 7,673 Fuel oil stock, at average cost 38,777 8,471 10,990 — — 58,238 Materials and supplies, at average cost 38,786 9,896 18,662 — — 67,344 Prepayments and other 34,306 5,197 4,580 — — 44,083 Regulatory assets 22,095 1,954 6,386 — — 30,435 Total current assets 413,183 69,212 80,390 77 (42,895) 519,967 Other long-term assets Operating lease right-of-use assets 125,858 1,443 353 — — 127,654 Regulatory assets 513,192 114,461 108,620 — — 736,273 Other 98,307 17,992 20,010 — — 136,309 Total other long-term assets 737,357 133,896 128,983 — — 1,000,236 Total assets $ 5,251,977 977,151 897,953 77 (669,785) $ 6,457,373 Capitalization and liabilities Capitalization Common stock equity $ 2,141,918 317,451 309,363 77 (626,891) [2] $ 2,141,918 Cumulative preferred stock–not subject to mandatory redemption 22,293 7,000 5,000 — — 34,293 Long-term debt, net 1,116,426 216,447 228,429 — — 1,561,302 Total capitalization 3,280,637 540,898 542,792 77 (626,891) 3,737,513 Current liabilities Current portion of operating lease liabilities 64,599 98 33 — — 64,730 Short-term borrowings-non-affiliate 49,979 — — — — 49,979 Short-term borrowings-affiliate — 18,800 7,900 — (26,700) [1] — Accounts payable 97,102 19,570 17,177 — — 133,849 Interest and preferred dividends payable 14,480 3,138 2,790 — (58) [1] 20,350 Taxes accrued 135,018 29,869 27,637 — — 192,524 Regulatory liabilities 20,224 8,785 8,292 — — 37,301 Other 57,926 13,851 18,621 — (16,136) [1] 74,262 Total current liabilities 439,328 94,111 82,450 — (42,894) 572,995 Deferred credits and other liabilities Operating lease liabilities 67,824 1,344 326 — — 69,494 Deferred income taxes 282,685 54,108 61,005 — — 397,798 Regulatory liabilities 656,270 173,938 92,277 — — 922,485 Unamortized tax credits 82,563 15,363 13,989 — — 111,915 Defined benefit pension and other postretirement benefit plans liability 373,112 77,679 79,741 — — 530,532 Other 69,558 19,710 25,373 — — 114,641 Total deferred credits and other liabilities 1,532,012 342,142 272,711 — — 2,146,865 Total capitalization and liabilities $ 5,251,977 977,151 897,953 77 (669,785) $ 6,457,373 Consolidating balance sheet December 31, 2019 (in thousands) Hawaiian Electric Hawaii Electric Light Maui Electric Other subsidiaries Consolidating Hawaiian Electric Assets Property, plant and equipment Utility property, plant and equipment Land $ 42,598 5,606 3,612 — — $ 51,816 Plant and equipment 4,765,362 1,313,727 1,161,199 — — 7,240,288 Less accumulated depreciation (1,591,241) (574,615) (524,301) — — (2,690,157) Construction in progress 165,137 9,993 17,944 — — 193,074 Utility property, plant and equipment, net 3,381,856 754,711 658,454 — — 4,795,021 Nonutility property, plant and equipment, less accumulated depreciation 5,310 114 1,532 — — 6,956 Total property, plant and equipment, net 3,387,166 754,825 659,986 — — 4,801,977 Investment in wholly-owned subsidiaries, at equity 591,969 — — — (591,969) [2] — Current assets Cash and cash equivalents 2,239 6,885 1,797 101 — 11,022 Restricted cash 30,749 123 — — — 30,872 Advances to affiliates 27,700 8,000 — — (35,700) [1] — Customer accounts receivable, net 105,454 24,520 22,816 — — 152,790 Accrued unbilled revenues, net 83,148 17,071 17,008 — — 117,227 Other accounts receivable, net 18,396 1,907 1,960 — (10,695) [1] 11,568 Fuel oil stock, at average cost 69,003 8,901 14,033 — — 91,937 Materials and supplies, at average cost 34,876 8,313 17,513 — — 60,702 Prepayments and other 88,334 3,725 24,921 — — 116,980 Regulatory assets 27,689 1,641 1,380 — — 30,710 Total current assets 487,588 81,086 101,428 101 (46,395) 623,808 Other long-term assets Operating lease right-of-use assets 174,886 1,537 386 — — 176,809 Regulatory assets 476,390 109,163 98,817 — — 684,370 Other 69,010 15,493 17,215 — — 101,718 Total other long-term assets 720,286 126,193 116,418 — — 962,897 Total assets $ 5,187,009 962,104 877,832 101 (638,364) $ 6,388,682 Capitalization and liabilities Capitalization Common stock equity $ 2,047,352 298,998 292,870 101 (591,969) [2] $ 2,047,352 Cumulative preferred stock–not subject to mandatory redemption 22,293 7,000 5,000 — — 34,293 Long-term debt, net 1,006,737 206,416 188,561 — — 1,401,714 Total capitalization 3,076,382 512,414 486,431 101 (591,969) 3,483,359 Current liabilities Current portion of operating lease liabilities 63,582 94 31 — — 63,707 Current portion of long-term debt 61,958 13,995 20,000 — — 95,953 Short-term borrowings-non-affiliate 88,987 — — — — 88,987 Short-term borrowings-affiliate 8,000 — 27,700 — (35,700) [1] — Accounts payable 139,056 25,629 23,085 — — 187,770 Interest and preferred dividends payable 14,759 3,115 2,900 — (46) [1] 20,728 Taxes accrued 143,522 32,541 31,929 — — 207,992 Regulatory liabilities 13,363 9,454 7,907 — — 30,724 Other 51,295 11,362 15,297 — (10,649) [1] 67,305 Total current liabilities 584,522 96,190 128,849 — (46,395) 763,166 Deferred credits and other liabilities Operating lease liabilities 111,598 1,442 360 — — 113,400 Deferred income taxes 265,864 53,534 57,752 — — 377,150 Regulatory liabilities 664,894 178,474 98,218 — — 941,586 Unamortized tax credits 86,852 16,196 14,820 — — 117,868 Defined benefit pension and other postretirement benefit plans liability 339,471 69,928 69,364 — — 478,763 Other 57,426 33,926 22,038 — — 113,390 Total deferred credits and other liabilities 1,526,105 353,500 262,552 — — 2,142,157 Total capitalization and liabilities $ 5,187,009 962,104 877,832 101 (638,364) $ 6,388,682
Schedule of consolidating statements of changes in common stock equity	Consolidating statements of changes in common stock equity (in thousands) Hawaiian Electric Hawaii Electric Light Maui Electric Other subsidiaries Consolidating Hawaiian Electric Balance, December 31, 2017 $ 1,845,283 286,647 270,265 101 (557,013) $ 1,845,283 Net income for common stock 143,653 24,481 20,912 — (45,393) 143,653 Other comprehensive income, net of taxes 1,318 34 207 — (241) 1,318 Issuance of common stock, net of expenses 70,692 1 1,498 — (1,499) 70,692 Common stock dividends (103,305) (15,289) (12,019) — 27,308 (103,305) Balance, December 31, 2018 1,957,641 295,874 280,863 101 (576,838) 1,957,641 Net income for common stock 156,840 20,817 22,350 — (43,167) 156,840 Other comprehensive loss, net of tax benefits (1,378) (12) (174) — 186 (1,378) Issuance of common stock, net of expenses 35,501 (1) 4,899 — (4,898) 35,501 Common stock dividends (101,252) (17,680) (15,068) — 32,748 (101,252) Balance, December 31, 2019 2,047,352 298,998 292,870 101 (591,969) 2,047,352 Net income for common stock 169,340 27,493 20,011 — (47,504) 169,340 Other comprehensive loss, net of tax benefits (1,640) (220) (134) — 354 (1,640) Issuance of common stock, net of expenses 34,000 7,500 11,000 — (18,500) 34,000 Common stock dividends (107,134) (16,320) (14,384) — 30,704 (107,134) Dissolution of subsidiary — — — (24) 24 — Balance, December 31, 2020 $ 2,141,918 317,451 309,363 77 (626,891) $ 2,141,918
Schedule of consolidating statements of cash flows	Consolidating statement of cash flows Year ended December 31, 2020 (in thousands) Hawaiian Electric Hawaii Electric Light Maui Electric Other subsidiaries Consolidating Hawaiian Electric Cash flows from operating activities Net income $ 170,420 28,027 20,392 — (47,504) [2] $ 171,335 Adjustments to reconcile net income to net cash provided by operating activities Equity in earnings of subsidiaries (47,504) — — — 47,504 [2] — Common stock dividends received from subsidiaries 30,704 — — — (30,704) [2] — Depreciation of property, plant and equipment 151,387 39,041 32,305 — — 222,733 Other amortization 24,511 5,090 4,145 — — 33,746 Deferred income taxes 2,130 (463) 1,484 — — 3,151 State refundable credit (6,668) (1,593) (1,700) — — (9,961) Bad debt expense 1,042 620 453 — — 2,115 Allowance for equity funds used during construction (7,335) (543) (890) — — (8,768) Accrued environmental reserve 6,556 — — — — 6,556 Other 1,201 1,322 87 — — 2,610 Changes in assets and liabilities: Increase in accounts receivable (8,093) (3,349) (1,343) — 5,499 [1] (7,286) Decrease in accrued unbilled revenues 8,832 3,327 3,126 — — 15,285 Decrease in fuel oil stock 30,226 430 3,043 — — 33,699 Increase in materials and supplies (3,910) (1,583) (1,149) — — (6,642) Decrease (increase) in regulatory assets 8,526 (2,908) (4,611) — — 1,007 Decrease in regulatory liabilities (5,490) (4,489) (6,583) (16,562) Decrease in accounts payable (26,093) (1,819) (5,217) — — (33,129) Change in prepaid and accrued income taxes, tax credits and revenue taxes (25,757) (5,483) (5,998) — 58 [1] (37,180) Decrease in defined benefit pension and other postretirement benefit plans liability (3,092) (643) (571) — — (4,306) Change in other assets and liabilities (21,124) (8,864) 3,635 — (5,499) [1] (31,852) Net cash provided by operating activities 280,469 46,120 40,608 — (30,646) 336,551 Cash flows from investing activities Capital expenditures (229,127) (64,346) (57,391) — — (350,864) Advances from affiliates 1,000 8,000 — — (9,000) [1] — Other (14,340) 1,032 960 (24) 18,442 [1],[2] 6,070 Net cash used in investing activities (242,467) (55,314) (56,431) (24) 9,442 (344,794) Cash flows from financing activities Common stock dividends (107,134) (16,320) (14,384) — 30,704 [2] (107,134) Preferred stock dividends of Hawaiian Electric and subsidiaries (1,080) (534) (381) — — (1,995) Proceeds from issuance of common stock 34,000 7,500 11,000 — (18,500) [2] 34,000 Proceeds from issuance of long-term debt 205,000 10,000 40,000 — — 255,000 Repayment of long-term debt (95,000) (14,000) — — — (109,000) Net increase (decrease) in short-term borrowings from non-affiliates and affiliate with original maturities of three months or less (46,987) 18,800 (19,800) — 9,000 [1] (38,987) Proceeds from issuance of short-term debt 100,000 — — — — 100,000 Repayment of short-term debt (100,000) — — — — (100,000) Other (1,618) (214) (377) — — (2,209) Net cash provided by (used in) financing activities (12,819) 5,232 16,058 — 21,204 29,675 Net increase (decrease) in cash, cash equivalents and restricted cash 25,183 (3,962) 235 (24) — 21,432 Cash, cash equivalents and restricted cash, January 1 32,988 7,008 1,797 101 — 41,894 Cash, cash equivalents and restricted cash, December 31 58,171 3,046 2,032 77 — 63,326 Less: Restricted cash (15,966) — — — — (15,966) Cash and cash equivalents, December 31 42,205 3,046 2,032 77 — $ 47,360 Consolidating statement of cash flows Year ended December 31, 2019 (in thousands) Hawaiian Electric Hawaii Electric Light Maui Electric Other subsidiaries Consolidating Hawaiian Electric Cash flows from operating activities Net income $ 157,920 21,351 22,731 — (43,167) [2] $ 158,835 Adjustments to reconcile net income to net cash provided by operating activities Equity in earnings of subsidiaries (43,204) — — — 43,167 [2] (37) Common stock dividends received from subsidiaries 32,783 — — — (32,748) [2] 35 Depreciation of property, plant and equipment 143,470 41,812 30,449 — — 215,731 Other amortization 23,351 4,810 1,470 — — 29,631 Deferred income taxes (13,547) (2,383) (354) — — (16,284) State refundable credit (6,245) (559) (1,565) — — (8,369) Bad debt expense 1,236 470 444 — — 2,150 Allowance for equity funds used during construction (9,955) (816) (1,216) — — (11,987) Accrued environmental reserve 406 — — — — 406 Other 27,575 (61) (55) — — 27,459 Changes in assets and liabilities: Decrease in accounts receivable 24,150 2,858 3,029 — (11,215) [1] 18,822 Decrease (increase) in accrued unbilled revenues 4,902 (22) (385) — — 4,495 Decrease (increase) in fuel oil stock (14,741) 2,126 613 — — (12,002) Decrease (increase) in materials and supplies (4,585) (1,158) 245 — — (5,498) Decrease in regulatory assets 55,494 9,218 6,550 — — 71,262 Increase (decrease) in regulatory liabilities 102 (1,558) 3,409 1,953 Increase (decrease) in accounts payable 4,687 (3,160) (3,578) — — (2,051) Change in prepaid and accrued income taxes, tax credits and revenue taxes (24,900) (893) (3,097) — 367 [1] (28,523) Decrease in defined benefit pension and other postretirement benefit plans liability (3,033) (762) (653) — — (4,448) Change in other assets and liabilities (15,747) (6,152) (6,940) — 11,215 [1] (17,624) Net cash provided by operating activities 340,119 65,121 51,097 — (32,381) 423,956 Cash flows from investing activities Capital expenditures (311,538) (49,811) (58,549) — — (419,898) Advances to affiliates (27,700) (8,000) — — 35,700 [1] — Other 5,241 297 1,303 — 4,533 [1],[2] 11,374 Net cash used in investing activities (333,997) (57,514) (57,246) — 40,233 (408,524) Cash flows from financing activities Common stock dividends (101,252) (17,680) (15,068) — 32,748 [2] (101,252) Preferred stock dividends of Hawaiian Electric and subsidiaries (1,080) (534) (381) — — (1,995) Proceeds from the issuance of common stock 35,500 — 4,900 — (4,900) [2] 35,500 Proceeds from the issuance of long-term debt 190,000 72,500 17,500 — — 280,000 Repayment of long-term debt and funds transferred for repayment of long-term dent (183,546) (70,000) (30,000) — — (283,546) Net increase in short-term borrowings from non-affiliates and affiliate with original maturities of three months or less 46,987 — 27,700 — (35,700) [1] 38,987 Proceeds from issuance of short-term debt 75,000 — — — — 75,000 Repayment of short-term debt (50,000) — — — — (50,000) Other (1,475) (508) (126) — — (2,109) Net cash provided by (used in) financing activities 10,134 (16,222) 4,525 — (7,852) (9,415) Net increase (decrease) in cash, cash equivalents and restricted cash 16,256 (8,615) (1,624) — — 6,017 Cash, cash equivalents and restricted cash, January 1 16,732 15,623 3,421 101 — 35,877 Cash, cash equivalents and restricted cash, December 31 32,988 7,008 1,797 101 — 41,894 Less: Restricted cash (30,749) (123) — — — (30,872) Cash and cash equivalents, December 31 $ 2,239 6,885 1,797 101 — $ 11,022 Consolidating statement of cash flows Year ended December 31, 2018 (in thousands) Hawaiian Electric Hawaii Electric Light Maui Electric Other subsidiaries Consolidating Hawaiian Electric Cash flows from operating activities Net income $ 144,733 25,015 21,293 — (45,393) [2] $ 145,648 Adjustments to reconcile net income to net cash provided by operating activities Equity in earnings of subsidiaries (45,493) — — — 45,393 [2] (100) Common stock dividends received from subsidiaries 27,408 — — — (27,308) [2] 100 Depreciation of property, plant and equipment 137,410 40,235 25,981 — — 203,626 Other amortization 20,956 5,069 577 — — 26,602 Deferred income taxes (9,806) (341) 2,165 — — (7,982) State refundable credit (4,941) (547) (751) — — (6,239) Bad debt expense 1,388 600 217 — — 2,205 Allowance for equity funds used during construction (9,208) (478) (1,191) — — (10,877) Accrued environmental reserve 273 — — — — 273 Other 3,908 334 427 — — 4,669 Changes in assets and liabilities: Increase in accounts receivable (53,020) (5,457) (8,829) — 14,220 [1] (53,086) Increase in accrued unbilled revenues (10,908) (1,121) (2,691) — — (14,720) Decrease (increase) in fuel oil stock 10,710 (2,329) (1,443) — — 6,938 Decrease (increase) in materials and supplies (1,966) 886 273 — — (807) Decrease (increase) in regulatory assets 12,192 71 (3,011) — — 9,252 Increase in regulatory liabilities 26,540 5,380 5,438 — — 37,358 Increase in accounts payable 14,748 6,104 3,506 — — 24,358 Change in prepaid and accrued income taxes, tax credits and revenue taxes 24,438 (2,118) 3,047 — (331) [1] 25,036 Increase (decrease) in defined benefit pension and other postretirement benefit plans liability 17,178 (760) 2,328 — — 18,746 Change in other assets and liabilities (8,329) 2,806 2,356 — (14,220) [1] (17,387) Net cash provided by operating activities 298,211 73,349 49,692 — (27,639) 393,613 Cash flows from investing activities Capital expenditures (305,703) (51,054) (58,507) — — (415,264) Advances from affiliates — — 12,000 — (12,000) [1] — Other 3,226 1,182 3,843 — 1,831 [1],[2] 10,082 Net cash used in investing activities (302,477) (49,872) (42,664) — (10,169) (405,182) Cash flows from financing activities Common stock dividends (103,305) (15,289) (12,019) — 27,308 [2] (103,305) Preferred stock dividends of Hawaiian Electric and subsidiaries (1,080) (534) (381) — — (1,995) Proceeds from the issuance of common stock 70,700 — 1,500 — (1,500) [2] 70,700 Proceeds from the issuance of long-term debt 75,000 15,000 10,000 — — 100,000 Repayment of long-term debt (30,000) (11,000) (9,000) — — (50,000) Net decrease in short-term borrowings from non-affiliates and affiliate with original maturities of three months or less (16,999) — — — 12,000 [1] (4,999) Proceeds from issuance of short-term debt 25,000 — — — — 25,000 Other (377) (56) (39) — — (472) Net cash provided by (used in) financing activities 18,939 (11,879) (9,939) — 37,808 34,929 Net increase (decrease) in cash and cash equivalents 14,673 11,598 (2,911) — — 23,360 Cash and cash equivalents, January 1 2,059 4,025 6,332 101 — 12,517 Cash and cash equivalents, December 31 $ 16,732 15,623 3,421 101 — $ 35,877 Explanation of consolidating adjustments on consolidating schedules: [1] Eliminations of intercompany receivables and payables and other intercompany transactions. [2] Elimination of investment in subsidiaries, carried at equity.

Bank segment (HEI only) (Tables

Bank segment (HEI only) (Tables)	12 Months Ended
	Dec. 31, 2020
Bank Segment Disclosure [Abstract]
Schedule of statements of income data	Statements of Income and Comprehensive Income Data Years ended December 31 2020 2019 2018 (in thousands) Interest and dividend income Interest and fees on loans $ 214,134 $ 233,632 $ 220,463 Interest and dividends on investment securities 30,529 32,922 37,762 Total interest and dividend income 244,663 266,554 258,225 Interest expense Interest on deposit liabilities 10,654 16,830 13,991 Interest on other borrowings 460 1,610 1,548 Total interest expense 11,114 18,440 15,539 Net interest income 233,549 248,114 242,686 Provision for credit losses 50,811 23,480 14,745 Net interest income after provision for credit losses 182,738 224,634 227,941 Noninterest income Fees from other financial services 16,447 19,275 18,937 Fee income on deposit liabilities 16,059 20,877 21,311 Fee income on other financial products 6,381 6,507 7,052 Bank-owned life insurance 6,483 7,687 5,057 Mortgage banking income 23,734 4,943 1,493 Gain on sale of real estate — 10,762 — Gain on sale of investment securities, net 9,275 653 — Other income, net (256) 2,074 2,200 Total noninterest income 78,123 72,778 56,050 Noninterest expense Compensation and employee benefits 104,443 103,009 98,387 Occupancy 21,573 21,272 17,073 Data processing 14,769 15,306 14,268 Services 11,121 10,239 10,847 Equipment 9,001 8,760 7,186 Office supplies, printing and postage 4,623 5,512 6,134 Marketing 3,435 4,490 3,567 FDIC insurance 2,342 1,204 2,713 Other expense 1 20,283 15,586 17,238 Total noninterest expense 191,590 185,378 177,413 Income before income taxes 69,271 112,034 106,578 Income taxes 11,688 23,061 24,069 Net income 57,583 88,973 82,509 Other comprehensive income (loss), net of taxes 23,608 29,406 (7,119) Comprehensive income $ 81,191 $ 118,379 $ 75,390 1 2020 includes approximately $5.1 million of certain direct and incremental COVID-19 related costs. For 2020, these costs, which have been recorded in Other expense , include $2.5 million of compensation expense and $2.0 million of enhanced cleaning and sanitation costs. Reconciliation to amounts per HEI Consolidated Statements of Income*: Years ended December 31 2020 2019 2018 (in thousands) Interest and dividend income $ 244,663 $ 266,554 $ 258,225 Noninterest income 78,123 72,778 56,050 Less: Gain on sale of real estate — 10,762 — Less: Gain on sale of investment securities, net 9,275 653 — *Revenues-Bank 313,511 327,917 314,275 Total interest expense 11,114 18,440 15,539 Provision for credit losses 50,811 23,480 14,745 Noninterest expense 191,590 185,378 177,413 Less: Retirement defined benefits expense (credit)—other than service costs 1,813 (472) 1,657 Add: Gain on sale of real estate — 10,762 — *Expenses-Bank 251,702 217,008 206,040 *Operating income-Bank 61,809 110,909 108,235 Add back: Retirement defined benefits expense (credit)—other than service costs 1,813 (472) 1,657 Add back: Gain on sale of investment securities, net 9,275 653 — Income before income taxes $ 69,271 $ 112,034 $ 106,578
Schedule of statements of comprehensive income data	Statements of Income and Comprehensive Income Data Years ended December 31 2020 2019 2018 (in thousands) Interest and dividend income Interest and fees on loans $ 214,134 $ 233,632 $ 220,463 Interest and dividends on investment securities 30,529 32,922 37,762 Total interest and dividend income 244,663 266,554 258,225 Interest expense Interest on deposit liabilities 10,654 16,830 13,991 Interest on other borrowings 460 1,610 1,548 Total interest expense 11,114 18,440 15,539 Net interest income 233,549 248,114 242,686 Provision for credit losses 50,811 23,480 14,745 Net interest income after provision for credit losses 182,738 224,634 227,941 Noninterest income Fees from other financial services 16,447 19,275 18,937 Fee income on deposit liabilities 16,059 20,877 21,311 Fee income on other financial products 6,381 6,507 7,052 Bank-owned life insurance 6,483 7,687 5,057 Mortgage banking income 23,734 4,943 1,493 Gain on sale of real estate — 10,762 — Gain on sale of investment securities, net 9,275 653 — Other income, net (256) 2,074 2,200 Total noninterest income 78,123 72,778 56,050 Noninterest expense Compensation and employee benefits 104,443 103,009 98,387 Occupancy 21,573 21,272 17,073 Data processing 14,769 15,306 14,268 Services 11,121 10,239 10,847 Equipment 9,001 8,760 7,186 Office supplies, printing and postage 4,623 5,512 6,134 Marketing 3,435 4,490 3,567 FDIC insurance 2,342 1,204 2,713 Other expense 1 20,283 15,586 17,238 Total noninterest expense 191,590 185,378 177,413 Income before income taxes 69,271 112,034 106,578 Income taxes 11,688 23,061 24,069 Net income 57,583 88,973 82,509 Other comprehensive income (loss), net of taxes 23,608 29,406 (7,119) Comprehensive income $ 81,191 $ 118,379 $ 75,390 1 2020 includes approximately $5.1 million of certain direct and incremental COVID-19 related costs. For 2020, these costs, which have been recorded in Other expense , include $2.5 million of compensation expense and $2.0 million of enhanced cleaning and sanitation costs. Reconciliation to amounts per HEI Consolidated Statements of Income*: Years ended December 31 2020 2019 2018 (in thousands) Interest and dividend income $ 244,663 $ 266,554 $ 258,225 Noninterest income 78,123 72,778 56,050 Less: Gain on sale of real estate — 10,762 — Less: Gain on sale of investment securities, net 9,275 653 — *Revenues-Bank 313,511 327,917 314,275 Total interest expense 11,114 18,440 15,539 Provision for credit losses 50,811 23,480 14,745 Noninterest expense 191,590 185,378 177,413 Less: Retirement defined benefits expense (credit)—other than service costs 1,813 (472) 1,657 Add: Gain on sale of real estate — 10,762 — *Expenses-Bank 251,702 217,008 206,040 *Operating income-Bank 61,809 110,909 108,235 Add back: Retirement defined benefits expense (credit)—other than service costs 1,813 (472) 1,657 Add back: Gain on sale of investment securities, net 9,275 653 — Income before income taxes $ 69,271 $ 112,034 $ 106,578
Schedule of balance sheets data	Balance Sheets Data December 31 2020 2019 (in thousands) Assets Cash and due from banks $ 178,422 $ 129,770 Interest-bearing deposits 114,304 48,628 Cash and cash equivalents 292,726 178,398 Investment securities Available-for-sale, at fair value 1,970,417 1,232,826 Held-to-maturity, at amortized cost (fair value of $229,963 and $143,467 at December 31, 2020 and 2019, respectively) 226,947 139,451 Stock in Federal Home Loan Bank, at cost 8,680 8,434 Loans held for investment 5,333,843 5,121,176 Allowance for credit losses (101,201) (53,355) Net loans 5,232,642 5,067,821 Loans held for sale, at lower of cost or fair value 28,275 12,286 Other 554,656 511,611 Goodwill 82,190 82,190 Total assets $ 8,396,533 $ 7,233,017 Liabilities and shareholder’s equity Deposit liabilities–noninterest-bearing $ 2,598,500 $ 1,909,682 Deposit liabilities–interest-bearing 4,788,457 4,362,220 Other borrowings 89,670 115,110 Other 183,731 146,954 Total liabilities 7,660,358 6,533,966 Commitments and contingencies Common stock 1 1 Additional paid in capital 351,758 349,453 Retained earnings 369,470 358,259 Accumulated other comprehensive income (loss), net of taxes Net unrealized gains (losses) on securities $ 19,986 $ 2,481 Retirement benefit plans (5,040) 14,946 (11,143) (8,662) Total shareholder’s equity 736,175 699,051 Total liabilities and shareholder’s equity $ 8,396,533 $ 7,233,017 December 31 2020 2019 (in thousands) Other assets Bank-owned life insurance $ 163,265 $ 157,465 Premises and equipment, net 206,134 204,449 Accrued interest receivable 24,616 19,365 Mortgage servicing rights 10,020 9,101 Low-income housing investments 83,435 66,302 Other 67,186 54,929 $ 554,656 $ 511,611 Other liabilities Accrued expenses $ 62,694 $ 45,822 Federal and state income taxes payable 6,582 14,996 Cashier’s checks 38,011 23,647 Advance payments by borrowers 10,207 10,486 Other 66,237 52,003 $ 183,731 $ 146,954
Schedule of the book value and aggregate fair value by major security type	The major components of investment securities were as follows: Gross unrealized losses Gross unrealized Gross unrealized Estimated fair value Less than 12 months 12 months or longer (dollars in thousands) Amortized Number of issues Fair value Amount Number of issues Fair value Amount December 31, 2020 Available-for-sale U.S. Treasury and federal agency obligations $ 60,260 $ 2,062 $ — $ 62,322 — $ — $ — — $ — $ — Mortgage-backed securities* 1,825,893 26,817 (3,151) 1,849,559 22 373,924 (3,151) — — — Corporate bonds 29,776 1,575 — 31,351 — — — — — — Mortgage revenue bonds 27,185 — — 27,185 — — — — — — $ 1,943,114 $ 30,454 $ (3,151) $ 1,970,417 22 $ 373,924 $ (3,151) — $ — $ — Held-to-maturity Mortgage-backed securities* $ 226,947 $ 3,846 $ (830) $ 229,963 7 $ 114,152 $ (830) — $ — $ — $ 226,947 $ 3,846 $ (830) $ 229,963 7 $ 114,152 $ (830) — $ — $ — December 31, 2019 Available-for-sale U.S. Treasury and federal agency obligations $ 117,255 $ 652 $ (120) $ 117,787 2 $ 4,110 $ (11) 3 $ 27,637 $ (109) Mortgage-backed securities* 1,024,892 6,000 (4,507) 1,026,385 19 152,071 (819) 75 318,020 (3,688) Corporate bonds 58,694 1,363 — 60,057 — — — — — — Mortgage revenue bonds 28,597 — — 28,597 — — — — — — $ 1,229,438 $ 8,015 $ (4,627) $ 1,232,826 21 $ 156,181 $ (830) 78 $ 345,657 $ (3,797) Held-to-maturity Mortgage-backed securities* $ 139,451 $ 4,087 $ (71) $ 143,467 1 $ 12,986 $ (71) — $ — $ — $ 139,451 $ 4,087 $ (71) $ 143,467 1 $ 12,986 $ (71) — $ — $ — * Issued or guaranteed by U.S. Government agencies or sponsored agencies
Schedule of contractual maturities of available-for-sale securities	The contractual maturities of investment securities were as follows: Amortized Fair December 31, 2020 Cost value (in thousands) Available-for-sale Due in one year or less $ 16,974 $ 17,098 Due after one year through five years 41,551 43,285 Due after five years through ten years 31,511 33,290 Due after ten years 27,185 27,185 117,221 120,858 Mortgage-backed securities — issued or guaranteed by U.S. Government agencies or sponsored agencies 1,825,893 1,849,559 Total available-for-sale securities $ 1,943,114 $ 1,970,417 Held-to-maturity Mortgage-backed securities — issued or guaranteed by U.S. Government agencies or sponsored agencies $ 226,947 $ 229,963 Total held-to-maturity securities $ 226,947 $ 229,963
Schedule of proceeds, gains and losses from sales of available for sale investment securities	The proceeds, gross gains and losses from sales of available-for-sale securities were as follows: Years ended December 31 2020 2019 2018 (in thousands) Proceeds $ 169,157 $ 19,810 $ — Gross gains 9,275 653 — Gross losses — — —
Schedule of interest income from available for sale investment securities	Interest income from taxable and non-taxable investment securities were as follows: Years ended December 31 2020 2019 2018 (in thousands) Taxable $ 29,760 $ 31,848 $ 37,153 Non-taxable 769 1,074 609 $ 30,529 $ 32,922 $ 37,762
Schedule of loans receivable	The components of loans were summarized as follows: December 31 2020 2019 (in thousands) Real estate: Residential 1-4 family $ 2,144,239 $ 2,178,135 Commercial real estate 983,865 824,830 Home equity line of credit 963,578 1,092,125 Residential land 15,617 14,704 Commercial construction 121,424 70,605 Residential construction 11,022 11,670 Total real estate 4,239,745 4,192,069 Commercial 936,748 670,674 Consumer 168,733 257,921 Total loans 5,345,226 5,120,664 Less: Deferred fees and discounts (11,383) 512 Allowance for credit losses (101,201) (53,355) Total loans, net $ 5,232,642 $ 5,067,821
Schedule of allowance for loan losses	The allowance for credit losses (balances and changes) and financing receivables by portfolio segment were as follows: (in thousands) Residential 1-4 family Commercial Home equity Residential land Commercial construction Residential construction Commercial Consumer Total December 31, 2020 Allowance for credit losses: Beginning balance, prior to adoption of ASU No. 2016-13 $ 2,380 $ 15,053 $ 6,922 $ 449 $ 2,097 $ 3 $ 10,245 $ 16,206 $ 53,355 Impact of adopting ASU No. 2016-13 2,150 208 (541) (64) 289 14 922 16,463 19,441 Charge-offs (7) — (77) (351) — — (5,819) (19,900) (26,154) Recoveries 394 — 63 38 — — 872 3,381 4,748 Net (charge-offs) recoveries 387 — (14) (313) — — (4,947) (16,519) (21,406) Provision (317) 20,346 446 537 1,763 (6) 19,242 7,800 49,811 Ending balance $ 4,600 $ 35,607 $ 6,813 $ 609 $ 4,149 $ 11 $ 25,462 $ 23,950 $ 101,201 Average loans outstanding $ 2,148,848 $ 861,096 $ 1,060,444 $ 13,799 $ 93,740 $ 10,703 $ 935,663 $ 215,994 $ 5,340,287 Net charge-offs (recoveries) to average loans (0.02) % — % — % 2.27 % — % — % 0.53 % 7.65 % 0.40 % December 31, 2019 Allowance for credit losses: Beginning balance $ 1,976 $ 14,505 $ 6,371 $ 479 $ 2,790 $ 4 $ 9,225 $ 16,769 $ 52,119 Charge-offs (26) — (144) (4) — — (6,811) (21,677) (28,662) Recoveries 854 — 17 229 — — 2,351 2,967 6,418 Net (charge-offs) recoveries 828 — (127) 225 — — (4,460) (18,710) (22,244) Provision (424) 548 678 (255) (693) (1) 5,480 18,147 23,480 Ending balance $ 2,380 $ 15,053 $ 6,922 $ 449 $ 2,097 $ 3 $ 10,245 $ 16,206 $ 53,355 Average loans outstanding $ 2,164,759 $ 781,531 $ 1,043,479 $ 14,065 $ 81,937 $ 10,513 $ 620,206 $ 270,340 $ 4,986,830 Net charge-offs (recoveries) to average loans (0.04) % — % 0.01 % (1.60 %) — % — % 0.72 % 6.92 % 0.45 % Ending balance: individually evaluated for impairment $ 898 $ 2 $ 322 $ — $ — $ — $ 1,015 $ 454 $ 2,691 Ending balance: collectively evaluated for impairment $ 1,482 $ 15,051 $ 6,600 $ 449 $ 2,097 $ 3 $ 9,230 $ 15,752 $ 50,664 Financing Receivables: Ending balance $ 2,178,135 $ 824,830 $ 1,092,125 $ 14,704 $ 70,605 $ 11,670 $ 670,674 $ 257,921 $ 5,120,664 Ending balance: individually evaluated for impairment $ 15,600 $ 1,048 $ 12,073 $ 3,091 $ — $ — $ 8,418 $ 507 $ 40,737 Ending balance: collectively evaluated for impairment $ 2,162,535 $ 823,782 $ 1,080,052 $ 11,613 $ 70,605 $ 11,670 $ 662,256 $ 257,414 $ 5,079,927 December 31, 2018 Allowance for credit losses: Beginning balance $ 2,902 $ 15,796 $ 7,522 $ 896 $ 4,671 $ 12 $ 10,851 $ 10,987 $ 53,637 Charge-offs (128) — (353) (18) — — (2,722) (17,296) (20,517) Recoveries 74 — 257 179 — — 2,136 1,608 4,254 Net (charge-offs) recoveries (54) — (96) 161 — — (586) (15,688) (16,263) Provision (872) (1,291) (1,055) (578) (1,881) (8) (1,040) 21,470 14,745 Ending balance $ 1,976 $ 14,505 $ 6,371 $ 479 $ 2,790 $ 4 $ 9,225 $ 16,769 $ 52,119 Average loans outstanding $ 2,105,674 $ 745,186 $ 944,065 $ 14,935 $ 114,969 $ 14,959 $ 579,133 $ 240,414 $ 4,759,335 Net charge-offs (recoveries) to average loans — % — % 0.01 % (1.08 %) — % — % 0.10 % 6.53 % 0.34 % Ending balance: individually evaluated for impairment $ 876 $ 7 $ 701 $ 6 $ — $ — $ 628 $ 4 $ 2,222 Ending balance: collectively evaluated for impairment $ 1,100 $ 14,498 $ 5,670 $ 473 $ 2,790 $ 4 $ 8,597 $ 16,765 $ 49,897 Financing Receivables: Ending balance $ 2,143,397 $ 748,398 $ 978,237 $ 13,138 $ 92,264 $ 14,307 $ 587,891 $ 266,002 $ 4,843,634 Ending balance: individually evaluated for impairment $ 16,494 $ 915 $ 14,800 $ 2,059 $ — $ — $ 5,340 $ 89 $ 39,697 Ending balance: collectively evaluated for impairment $ 2,126,903 $ 747,483 $ 963,437 $ 11,079 $ 92,264 $ 14,307 $ 582,551 $ 265,913 $ 4,803,937
Schedule of allowance for loan commitments	Allowance for loan commitments. The allowance for loan commitments by portfolio segment were as follows: (in thousands) Home equity Commercial construction Commercial loans Total Year ended December 31, 2020 Allowance for loan commitments: Beginning balance, prior to adoption of ASU No. 2016-13 $ 392 $ 931 $ 418 $ 1,741 Impact of adopting ASU No. 2016-13 (92) 1,745 (94) 1,559 Provision — 324 676 1,000 Ending balance $ 300 $ 3,000 $ 1,000 $ 4,300
Schedule of credit risk profile by internally assigned grade for loans	The credit risk profile by vintage date based on payment activity or internally assigned grade for loans was as follows: Term Loans by Origination Year Revolving Loans (in thousands) 2020 2019 2018 2017 2016 Prior Revolving loans Converted to term loans Total December 31, 2020 Residential 1-4 family Current $ 567,282 $ 218,988 $ 111,243 $ 203,916 $ 184,888 $ 849,788 $ — $ — $ 2,136,105 30-59 days past due — — — — — 2,629 — — 2,629 60-89 days past due — 476 — — — 2,314 — — 2,790 Greater than 89 days past due — — — 353 — 2,362 — — 2,715 567,282 219,464 111,243 204,269 184,888 857,093 — — 2,144,239 Home equity line of credit Current — — — — — — 927,106 33,228 960,334 30-59 days past due — — — — — — 552 298 850 60-89 days past due — — — — — — 267 75 342 Greater than 89 days past due — — — — — — 1,463 589 2,052 — — — — — — 929,388 34,190 963,578 Residential land Current 8,357 3,427 1,598 939 22 272 — — 14,615 30-59 days past due — — — — — 702 — — 702 60-89 days past due — — — — — — — — — Greater than 89 days past due — — — — — 300 — — 300 8,357 3,427 1,598 939 22 1,274 — — 15,617 Residential construction Current 6,919 3,093 385 625 — — — — 11,022 30-59 days past due — — — — — — — — — 60-89 days past due — — — — — — — — — Greater than 89 days past due — — — — — — — — — 6,919 3,093 385 625 — — — — 11,022 Consumer Current 28,818 67,159 37,072 7,207 293 348 18,351 3,758 163,006 30-59 days past due 406 1,085 727 155 4 — 138 90 2,605 60-89 days past due 191 549 427 165 3 — 97 59 1,491 Greater than 89 days past due 131 532 409 119 7 — 262 171 1,631 29,546 69,325 38,635 7,646 307 348 18,848 4,078 168,733 Commercial real estate Pass 270,603 63,301 62,168 28,432 55,089 155,654 11,000 — 646,247 Special Mention 10,261 36,405 57,952 33,763 68,287 48,094 — — 254,762 Substandard — 14,720 4,181 1,892 4,423 57,640 — — 82,856 Doubtful — — — — — — — — — 280,864 114,426 124,301 64,087 127,799 261,388 11,000 — 983,865 Commercial construction Pass 14,480 31,965 26,990 — 5,562 — 22,517 — 101,514 Special Mention 1,910 — — 18,000 — — — — 19,910 Substandard — — — — — — — — — Doubtful — — — — — — — — — 16,390 31,965 26,990 18,000 5,562 — 22,517 — 121,424 Commercial Pass 392,088 117,791 75,533 29,211 12,520 35,770 74,520 11,004 748,437 Special Mention 37,836 23,087 1,920 6,990 30,264 13,250 31,362 11,218 155,927 Substandard 304 7,785 2,043 4,017 7,542 3,113 5,265 1,928 31,997 Doubtful — — — — — — 387 — 387 430,228 148,663 79,496 40,218 50,326 52,133 111,534 24,150 936,748 Total loans $ 1,339,586 $ 590,363 $ 382,648 $ 335,784 $ 368,904 $ 1,172,236 $ 1,093,287 $ 62,418 $ 5,345,226 Revolving loans converted to term loans during 2020 in the commercial, home equity line of credit and consumer portfolios were $14.4 million, $11.3 million and $2.8 million, respectively. December 31, 2019 (in thousands) Commercial Commercial Commercial Total Grade: Pass $ 756,747 $ 68,316 $ 621,657 $ 1,446,720 Special mention 4,451 — 29,921 34,372 Substandard 63,632 2,289 19,096 85,017 Doubtful — — — — Loss — — — — Total $ 824,830 $ 70,605 $ 670,674 $ 1,566,109
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 60-89 Greater Total Current Total Recorded December 31, 2020 Real estate: Residential 1-4 family $ 2,629 $ 2,790 $ 2,715 $ 8,134 $ 2,136,105 $ 2,144,239 $ — Commercial real estate — 488 — 488 983,377 983,865 — Home equity line of credit 850 342 2,052 3,244 960,334 963,578 — Residential land 702 — 300 1,002 14,615 15,617 — Commercial construction — — — — 121,424 121,424 — Residential construction — — — — 11,022 11,022 — Commercial 608 300 132 1,040 935,708 936,748 — Consumer 2,605 1,491 1,631 5,727 163,006 168,733 — Total loans $ 7,394 $ 5,411 $ 6,830 $ 19,635 $ 5,325,591 $ 5,345,226 $ — December 31, 2019 Real estate: Residential 1-4 family $ 2,588 $ 290 $ 1,808 $ 4,686 $ 2,173,449 $ 2,178,135 $ — Commercial real estate — — — — 824,830 824,830 — Home equity line of credit 813 — 2,117 2,930 1,089,195 1,092,125 — Residential land — — 25 25 14,679 14,704 — Commercial construction — — — — 70,605 70,605 — Residential construction — — — — 11,670 11,670 — Commercial 1,077 311 172 1,560 669,114 670,674 — Consumer 4,386 3,257 2,907 10,550 247,371 257,921 — Total loans $ 8,864 $ 3,858 $ 7,029 $ 19,751 $ 5,100,913 $ 5,120,664 $ —
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 were as follows: December 31, 2020 December 31, 2019 (in thousands) With a Related Without a Total Total Real estate: Residential 1-4 family $ 8,991 $ 2,835 $ 11,826 $ 11,395 Commercial real estate 15,847 2,875 18,722 195 Home equity line of credit 5,791 1,567 7,358 6,638 Residential land 108 300 408 448 Commercial construction — — — — Residential construction — — — — Commercial 1,819 3,328 5,147 5,947 Consumer 3,935 — 3,935 5,113 Total $ 36,491 $ 10,905 $ 47,396 $ 29,736 The credit risk profile based on loans whose terms have been modified and accruing interest were as follows: (in thousands) December 31, 2020 December 31, 2019 Real estate: Residential 1-4 family $ 7,932 $ 9,869 Commercial real estate 3,281 853 Home equity line of credit 8,148 10,376 Residential land 1,555 2,644 Commercial construction — — Residential construction — — Commercial 6,108 2,614 Consumer 54 57 Total troubled debt restructured loans accruing interest $ 27,078 $ 26,413
Schedule of loan modifications	Loan modifications that occurred during 2020, 2019, and 2018 were as follows: Years ended December 31, 2020 December 31, 2019 (dollars in thousands) Number of contracts Outstanding recorded investment (as of period end) 1 Related allowance (as of period end) Number of contracts Outstanding recorded investment (as of period end) 1 Related allowance (as of period end) Real estate: Residential 1-4 family 1 $ 144 $ 6 11 $ 1,770 $ 190 Commercial real estate 6 20,714 4,439 — — — Home equity line of credit 3 85 11 3 442 73 Residential land 4 668 54 3 1,086 — Commercial construction — — — — — — Residential construction — — — — — — Commercial 54 5,380 869 8 5,523 417 Consumer — — — — — — 68 $ 26,991 $ 5,379 25 $ 8,821 $ 680 Year ended December 31, 2018 (dollars in thousands) Number of contracts Outstanding recorded investment (as of period end) 1 Related allowance (as of period end) Real estate: Residential 1-4 family 3 $ 566 $ 26 Commercial real estate — — — Home equity line of credit 53 6,659 578 Residential land 2 1,338 — Commercial construction — — — Residential construction — — — Commercial 12 2,165 211 Consumer — — — 70 $ 10,728 $ 815 1 The period end balances reflect all paydowns and charge-offs since the modification period. TDRs fully paid off, charged-off, or foreclosed upon by period end are not included.
Schedule of loans modified in TDRS that experienced a payment default of 90 days or more, and for which payment default occurred within one year of the modification	Loans modified in TDRs that experienced a payment default of 90 days or more in 2020, 2019, and 2018 and for which the payment default occurred within one year of the modification, were as follows: Years ended December 31 2020 2019 2018 (dollars in thousands) Number of Recorded Number of Recorded Number of Recorded Troubled debt restructurings that subsequently defaulted Real estate: Residential 1-4 family — $ — — $ — — $ — Commercial real estate — — — — — — Home equity line of credit — — — — 1 81 Residential land — — — — — — Commercial construction — — — — — — Residential construction — — — — — — Commercial — — — — 1 246 Consumer — — — — — — — $ — — $ — 2 $ 327
Schedule of collateral-dependent loans and carrying amount and the total unpaid principal balance of impaired loans	Loans considered collateral-dependent were as follows: December 31, 2020 Amortized cost Collateral type (in thousands) Real estate: Residential 1-4 family $ 2,541 Residential real estate property Commercial real estate 2,875 Commercial real estate property Home equity line of credit 1,567 Residential real estate property Residential land 300 Residential real estate property Total real estate 7,283 Commercial 934 Business assets Total $ 8,217 The total carrying amount and the total unpaid principal balance of impaired loans and ASB’s average recorded investment of, and interest income recognized from, impaired loans were as follows: December 31 2019 2019 2018 (in thousands) Recorded Unpaid Related Average Interest Average Interest With no related allowance recorded Real estate: Residential 1-4 family $ 6,817 $ 7,207 $ — $ 8,169 $ 907 $ 8,595 $ 445 Commercial real estate 195 200 — 16 — — — Home equity line of credit 1,984 2,135 — 2,020 84 2,206 75 Residential land 3,091 3,294 — 2,662 129 1,532 40 Commercial construction — — — — — — — Residential construction — — — — — — — Commercial 1,948 2,285 — 4,534 276 3,275 28 Consumer 2 2 — 21 4 22 — 14,037 15,123 — 17,422 1,400 15,630 588 With an allowance recorded Real estate: Residential 1-4 family 8,783 8,835 898 8,390 359 8,878 363 Commercial real estate 853 853 2 886 37 982 42 Home equity line of credit 10,089 10,099 322 11,319 567 10,617 440 Residential land — — — 27 — 37 3 Commercial construction — — — — — — — Residential construction — — — — — — — Commercial 6,470 6,470 1,015 6,990 132 1,789 122 Consumer 505 505 454 360 24 57 4 26,700 26,762 2,691 27,972 1,119 22,360 974 Total Real estate: Residential 1-4 family 15,600 16,042 898 16,559 1,266 17,473 808 Commercial real estate 1,048 1,053 2 902 37 982 42 Home equity line of credit 12,073 12,234 322 13,339 651 12,823 515 Residential land 3,091 3,294 — 2,689 129 1,569 43 Commercial construction — — — — — — — Residential construction — — — — — — — Commercial 8,418 8,755 1,015 11,524 408 5,064 150 Consumer 507 507 454 381 28 79 4 $ 40,737 $ 41,885 $ 2,691 $ 45,394 $ 2,519 $ 37,990 $ 1,562 * Since loan was classified as impaired.
Schedule of amortized intangible assets	Changes in the carrying value of MSRs were as follows: (in thousands) Gross carrying amount 1 Accumulated amortization 1 Valuation allowance Net December 31, 2020 $ 22,950 $ (12,670) $ (260) $ 10,020 December 31, 2019 $ 21,543 $ (12,442) $ — $ 9,101 1 Reflects impact of loans paid in full. Changes related to MSRs were as follows: (in thousands) 2020 2019 2018 Mortgage servicing rights Balance, January 1 $ 9,101 $ 8,062 $ 8,639 Amount capitalized 5,096 2,987 1,045 Amortization (3,917) (1,948) (1,622) Sale of mortgage servicing rights — — — Other-than-temporary impairment — — — Carrying amount before valuation allowance, December 31 10,280 9,101 8,062 Valuation allowance for mortgage servicing rights Balance, January 1 — — — Provision 260 — — Other-than-temporary impairment — — — Balance, December 31 260 — — Net carrying value of mortgage servicing rights $ 10,020 $ 9,101 $ 8,062
Schedule of key assumptions used in estimating fair value	Key assumptions used in estimating the fair value of ASB’s MSRs used in the impairment analysis were as follows: December 31 2020 2019 (dollars in thousands) Unpaid principal balance $ 1,450,312 $ 1,276,437 Weighted average note rate 3.68 % 3.96 % Weighted average discount rate 9.25 % 9.25 % Weighted average prepayment speed 17.7 % 11.4 % 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 (dollars in thousands) Fair value Valuation technique Significant unobservable input Range Weighted December 31, 2020 Commercial loan $ 387 Fair value of collateral Appraised value less selling cost N/A (2) N/A (2) Mortgage servicing rights $ 3,001 Discounted cash flow Prepayment speed 15-22% 22% Discount rate 9.3% December 31, 2019 Residential land $ 25 Fair value of collateral Appraised value less selling cost N/A (2) N/A (2) (1) Represent percent of outstanding principal balance. (2) N/A - Not applicable. There is one asset in each fair value measurement type.
Schedule of sensitivity analysis of fair value of MSR to hypothetical adverse changes	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: December 31 2020 2019 (in thousands) Prepayment rate: 25 basis points adverse rate change $ (738) $ (950) 50 basis points adverse rate change (1,445) (1,947) Discount rate: 25 basis points adverse rate change (68) (102) 50 basis points adverse rate change (135) (202)
Schedule of deposit liabilities	The summarized components of deposit liabilities were as follows: December 31 2020 2019 (dollars in thousands) Weighted-average stated rate Amount Weighted-average stated rate Amount Savings 0.03 % $ 2,873,727 0.09 % $ 2,379,522 Checking Interest-bearing 0.02 1,196,675 0.09 1,062,122 Noninterest-bearing — 1,329,264 — 977,459 Commercial checking — 1,269,236 — 932,223 Money market 0.09 169,225 0.69 150,751 Time certificates 0.99 548,830 1.42 769,825 0.09 % $ 7,386,957 0.24 % $ 6,271,902
Schedule of maturities of term certificates	The approximate scheduled maturities of time certificates outstanding at December 31, 2020 were as follows: (in thousands) 2021 $ 348,420 2022 88,675 2023 50,146 2024 33,944 2025 25,225 Thereafter 2,420 $ 548,830
Schedule of interest expense on deposit liabilities by type	Interest expense on deposit liabilities by type of deposit was as follows: Years ended December 31 2020 2019 2018 (in thousands) Time certificates $ 7,944 $ 12,675 $ 11,044 Savings 1,774 1,904 1,639 Money market 465 953 602 Interest-bearing checking 471 1,298 706 $ 10,654 $ 16,830 $ 13,991
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 Gross amount Net amount of Repurchase agreements December 31, 2020 $ 90 $ — $ 90 December 31, 2019 115 — 115 Gross amount not offset in the Balance Sheets (in millions) Net amount of Financial Cash Commercial account holders December 31, 2020 $ 90 $ 92 $ — December 31, 2019 115 130 — Securities sold under agreements to repurchase were summarized as follows: December 31 2020 2019 Maturity Repurchase liability Weighted-average Collateralized by Repurchase liability Weighted-average Collateralized by (dollars in thousands) Overnight $ 89,670 0.02 % $ 92,478 $ 115,110 0.98 % $ 129,527 1 to 29 days — — % — — — % — 30 to 90 days — — % — — — % — Over 90 days — — % — — — % — $ 89,670 0.02 % $ 92,478 $ 115,110 0.98 % $ 129,527
Schedule of securities sold under agreements to repurchase, which provided for repurchase of identical securities	Information concerning securities sold under agreements to repurchase, which provided for the repurchase of identical securities, was as follows: (dollars in thousands) 2020 2019 2018 Amount outstanding as of December 31 $ 89,670 $ 115,110 $ 65,040 Average amount outstanding during the year 73,738 79,598 99,162 Maximum amount outstanding as of any month-end 100,580 115,110 152,255 Weighted-average interest rate as of December 31 0.02 % 0.98 % 0.75 % Weighted-average interest rate during the year 0.42 % 0.96 % 0.71 % Weighted-average remaining days to maturity as of December 31 1 1 1
Schedule of actual and minimum required capital amounts and ratios	The tables below set forth actual and minimum required capital amounts and ratios: Actual Minimum required Required to be well capitalized (dollars in thousands) Capital Ratio Capital Ratio Capital Ratio December 31, 2020 Tier 1 leverage $ 677,786 8.38 % $ 323,700 4.00 % $ 404,625 5.00 % December 31, 2019 Tier 1 leverage 641,547 9.06 % 283,122 4.00 % 353,903 5.00 % Common equity tier 1 641,547 13.18 % 219,071 4.50 % 316,435 6.50 % Tier 1 capital 641,547 13.18 % 292,094 6.00 % 389,459 8.00 % Total capital 696,643 14.31 % 389,459 8.00 % 486,823 10.00 %
Schedule of notional amounts and fair value of derivatives	The notional amount and fair value of ASB’s derivative financial instruments were as follows: December 31 2020 2019 (in thousands) Notional amount Fair value Notional amount Fair value Interest rate lock commitments $ 120,980 $ 4,536 $ 23,171 $ 297 Forward commitments 100,500 (500) 29,383 (42)
Schedule of derivative financial instruments, fair values, and balance sheet location	ASB’s derivative financial instruments, their fair values, and balance sheet location were as follows: Derivative Financial Instruments Not Designated as Hedging Instruments 1 December 31 2020 2019 (in thousands) Asset derivatives Liability derivatives Asset derivatives Liability derivatives Interest rate lock commitments $ 4,536 $ — $ 297 $ — Forward commitments — 500 3 45 $ 4,536 $ 500 $ 300 $ 45 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 amount and location of net gains or losses	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 Location of net gains as Hedging Instruments (losses) recognized in Years ended December 31 (in thousands) the Statements of Income 2020 2019 2018 Interest rate lock commitments Mortgage banking income $ 4,239 $ 206 $ (40) Forward commitments Mortgage banking income (458) 1 (19) $ 3,781 $ 207 $ (59)
Schedule of off balance sheet arrangements	The following is a summary of outstanding off-balance sheet arrangements: December 31 2020 2019 (in thousands) Unfunded commitments to extend credit: Home equity line of credit $ 1,248,773 $ 1,290,854 Commercial and commercial real estate 574,281 484,806 Consumer 69,168 70,088 Residential 1-4 family 57,862 21,131 Commercial and financial standby letters of credit 13,718 11,912 Total $ 1,963,802 $ 1,878,791

Long-term debt (Tables)

Long-term debt (Tables)	12 Months Ended
	Dec. 31, 2020
Long-term Debt, Unclassified [Abstract]
Schedule of long-term debt	December 31 2020 2019 (dollars in thousands) Long-term debt of Utilities, net of unamortized debt issuance costs 1 $ 1,561,302 $ 1,497,667 HEI 5.67% senior notes, due 2021 50,000 50,000 HEI 2.99% term loan, due 2022 150,000 150,000 HEI 3.99% senior notes, due 2023 50,000 50,000 HEI 4.58% senior notes, due 2025 50,000 50,000 HEI 4.72% senior notes, due 2028 100,000 100,000 HEI 2.98% senior notes, due 2030 50,000 — Hamakua Energy 4.02% notes, due 2030, secured by real and personal property of Hamakua Energy, LLC 56,030 59,699 Mauo LIBOR + 1.375% loan, due 2023 2 41,046 9,349 Ka`ie`ie Waho Company, LLC 2.79% non-recourse loan, due 2031 13,000 — Less unamortized debt issuance costs (2,249) (2,350) $ 2,119,129 $ 1,964,365 1 See components of “Total long-term debt” and unamortized debt issuance costs in Hawaiian Electric and subsidiaries’ Consolidated Statements of Capitalization.
Schedule of note purchases and private placements	The following table displays the actual draw date or the required by draw date of the HEI notes. HEI Series 2020A HEI Series 2020B (1) HEI Series 2020B (2) HEI Series 2020C Aggregate principal amount $50 million $46 million $5 million $24 million Fixed coupon interest rate 2.98% 3.15% 3.15% 2.82% Maturity date 12/15/2030 1/28/2031 1/28/2031 4/17/2028 Draw date 12/29/2020 1/28/2021 4/16/2021 4/16/2021 Series 2020A Series 2020B Series 2020C Aggregate principal amount $80 million $60 million $20 million Fixed coupon interest rate Hawaiian Electric 3.31% 3.31% 3.96% Hawaii Electric Light 3.96% Maui Electric 3.31% 3.96% Maturity date Hawaiian Electric 5/1/2030 5/1/2030 5/1/2050 Hawaii Electric Light 5/1/2050 Maui Electric 5/1/2030 5/1/2050 Principal amount by company: Hawaiian Electric $50 million (Green Bond) $40 million $20 million Hawaii Electric Light $10 million — — Maui Electric $20 million $20 million — On October 29, 2020, the Utilities executed, through a private placement pursuant to separate NPAs, unsecured senior notes bearing taxable interest (October Notes) as shown in the table below. The October Notes had a delayed draw feature and the Utilities drew down all the proceeds on January 14, 2021. Series 2020B Series 2020C Series 2020D Series 2020E Aggregate principal amount $15 million $40 million $30 million $30 million Fixed coupon interest rate Hawaiian Electric 3.28% 3.51% Hawaii Electric Light 3.28% 3.51% Maui Electric 3.51% Maturity date Hawaiian Electric 12/30/2040 12/30/2050 Hawaii Electric Light 12/30/2040 12/30/2050 Maui Electric 12/30/2050 Principal amount by company: Hawaiian Electric — — $30 million $30 million Hawaii Electric Light $15 million $15 million — — Maui Electric — $25 million — —

Shareholders' equity (Tables)

Shareholders' equity (Tables)	12 Months Ended
	Dec. 31, 2020
Equity [Abstract]
Schedule of accumulated other comprehensive income	Changes in the balances of each component of 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 AOCI-Retirement benefit plans Balance, December 31, 2017 $ (14,951) $ — $ (26,990) $ (41,941) $ (1,219) Current period other comprehensive income (loss) and reclassifications, net of taxes (9,472) (436) 1,239 (8,669) 1,318 Balance, December 31, 2018 (24,423) (436) (25,751) (50,610) 99 Current period other comprehensive income (loss) and reclassifications, net of taxes 26,904 (1,177) 4,844 30,571 (1,378) Balance, December 31, 2019 2,481 (1,613) (20,907) (20,039) (1,279) Current period other comprehensive income (loss) and reclassifications, net of taxes 17,505 (1,750) 3,020 18,775 (1,640) Balance, December 31, 2020 $ 19,986 $ (3,363) $ (17,887) $ (1,264) $ (2,919)
Schedule of reclassifications out of AOCI	Reclassifications out of AOCI were as follows: Amount reclassified from AOCI Affected line item in the Statement of Years ended December 31 2020 2019 2018 (in thousands) HEI consolidated Net realized gains on securities included in net income $ (1,638) $ (478) $ — Gain on sale of investment securities, net Retirement benefit plans: Amortization of prior service credit and net losses recognized during the period in net periodic benefit cost 23,689 10,107 21,015 See Note 10 for additional details Impact of D&Os of the PUC included in regulatory assets 39,860 (16,177) 8,325 See Note 10 for additional details Total reclassifications $ 61,911 $ (6,548) $ 29,340 Hawaiian Electric consolidated Retirement benefit plans: Amortization of prior service credit and net losses recognized during the period in net periodic benefit cost $ 21,550 $ 9,550 $ 19,012 See Note 10 for additional details Impact of D&Os of the PUC included in regulatory assets 39,860 (16,177) 8,325 See Note 10 for additional details Total reclassifications $ 61,410 $ (6,627) $ 27,337

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2020
Leases [Abstract]
Lease cost	Amounts related to the Company’s total lease cost and cash flows arising from lease transactions are as follows: HEI consolidated Hawaiian Electric consolidated Year ended December 31, 2020 Other leases PPAs classified as leases Total Other leases PPAs classified as leases Total (dollars in thousands) Operating lease cost $ 11,201 $ 63,319 $ 74,520 $ 6,022 $ 63,319 $ 69,341 Variable lease cost 12,765 217,173 229,938 9,842 217,173 227,015 Total lease cost $ 23,966 $ 280,492 $ 304,458 $ 15,864 $ 280,492 $ 296,356 Other information Cash paid for amounts included in the measurement of lease liabilities—Operating cash flows from operating leases $ 10,783 $ 60,801 $ 71,584 $ 6,223 $ 60,801 $ 67,024 Weighted-average remaining lease term—operating leases (in years) 8.9 1.8 4.4 10.1 1.8 3.8 Weighted-average discount rate—operating leases 2.87 % 4.08 % 3.61 % 3.20 % 4.08 % 3.84 % HEI consolidated Hawaiian Electric consolidated Year ended December 31, 2019 Other leases PPAs classified as leases Total Other leases PPAs classified as leases Total (dollars in thousands) Operating lease cost $ 10,265 $ 63,319 $ 73,584 $ 4,955 $ 63,319 $ 68,274 Variable lease cost 13,034 192,138 205,172 10,272 192,138 202,410 Total lease cost $ 23,299 $ 255,457 $ 278,756 $ 15,227 $ 255,457 $ 270,684 Other information Cash paid for amounts included in the measurement of lease liabilities—Operating cash flows from operating leases $ 10,447 $ 62,594 $ 73,041 $ 5,768 $ 62,594 $ 68,362 Weighted-average remaining lease term—operating leases (in years) 6.5 2.8 3.5 4.5 2.8 2.9 Weighted-average discount rate—operating leases 3.50 % 4.08 % 3.96 % 4.11 % 4.08 % 4.08 %
Schedule of operating lease liabilities	The following table summarizes the maturity of our operating lease liabilities as of December 31, 2020: HEI consolidated Hawaiian Electric consolidated (in millions) Other leases PPAs classified as leases Total Other leases PPAs classified as leases Total 2021 $ 11 $ 63 $ 74 $ 6 $ 63 $ 69 2022 9 42 51 4 42 46 2023 8 — 8 4 — 4 2024 7 — 7 3 — 3 2025 5 — 5 3 — 3 Thereafter 27 — 27 19 — 19 Total lease payments 67 105 172 39 105 144 Less: Imputed interest (8) (4) (12) (6) (4) (10) Total present value of lease payments 1 $ 59 $ 101 $ 160 $ 33 $ 101 $ 134 1 The fixed capacity payment related to the existing PPA with PGV, which will expire on December 31, 2027, is not included as a lease liability as of December 31, 2020. While the facility returned to service in the fourth quarter of 2020, it has been operating at a level providing only limited output, which does not provide firm capacity and does not obligate the Utility to make firm capacity payments. The contractual annual capacity payment is approximately $7 million. The lease liability will be remeasured when PGV returns to operating with firm capacity, at which time contractual firm capacity payments are reestablished.

Revenues (Tables)

Revenues (Tables)	12 Months Ended
	Dec. 31, 2020
Revenue from Contract with Customer [Abstract]
Disaggregation of revenue	The following tables disaggregate revenues by major source, timing of revenue recognition, and segment: Year ended December 31, 2020 Year ended December 31, 2019 (in thousands) Electric utility Bank Other Total Electric utility Bank Other Total Revenues from contracts with customers Electric energy sales - residential $ 766,609 $ — $ — $ 766,609 $ 807,652 $ — $ — $ 807,652 Electric energy sales - commercial 703,516 — — 703,516 846,110 — — 846,110 Electric energy sales - large light and power 751,464 — — 751,464 905,308 — — 905,308 Electric energy sales - other 8,054 — — 8,054 16,296 — — 16,296 Bank fees — 38,887 — 38,887 — 46,659 — 46,659 Other sales — — 921 921 — — — — Total revenues from contracts with customers 2,229,643 38,887 921 2,269,451 2,575,366 46,659 — 2,622,025 Revenues from other sources Regulatory revenue 11,869 — — 11,869 (54,101) — — (54,101) Bank interest and dividend income — 244,663 — 244,663 — 266,554 — 266,554 Other bank noninterest income — 29,961 — 29,961 — 14,704 — 14,704 Other 23,808 — 23 23,831 24,677 — 89 24,766 Total revenues from other sources 35,677 274,624 23 310,324 (29,424) 281,258 89 251,923 Total revenues $ 2,265,320 $ 313,511 $ 944 $ 2,579,775 $ 2,545,942 $ 327,917 $ 89 $ 2,873,948 Timing of revenue recognition Services/goods transferred at a point in time $ — $ 38,887 $ — $ 38,887 $ — $ 46,659 $ — $ 46,659 Services/goods transferred over time 2,229,643 — 921 2,230,564 2,575,366 — — 2,575,366 Total revenues from contracts with customers $ 2,229,643 $ 38,887 $ 921 $ 2,269,451 $ 2,575,366 $ 46,659 $ — $ 2,622,025

Retirement benefits (Tables)

Retirement benefits (Tables)	12 Months Ended
	Dec. 31, 2020
Retirement Benefits [Abstract]
Schedule of changes in the obligations and assets of the Company's retirement benefit plans and the changes in AOCI (gross) and the funded status	The changes in the obligations and assets of the Company’s and Utilities’ retirement benefit plans and the changes in AOCI (gross) for 2020 and 2019 and the funded status of these plans and amounts related to these plans reflected in the Company’s and Utilities’ consolidated balance sheets as of December 31, 2020 and 2019 were as follows: 2020 2019 (in thousands) Pension Other Pension Other HEI consolidated Benefit obligation, January 1 $ 2,278,283 $ 215,639 $ 1,991,384 $ 188,666 Service cost 73,387 2,537 62,135 2,209 Interest cost 81,335 7,407 84,267 8,004 Actuarial losses 275,973 9,785 224,421 25,998 Participants contributions — 2,768 — 2,351 Benefits paid and expenses (84,448) (11,715) (83,924) (11,589) Benefit obligation, December 31 2,624,530 226,421 2,278,283 215,639 Fair value of plan assets, January 1 1,799,200 200,831 1,479,067 173,693 Actual return on plan assets 302,566 27,678 354,072 35,525 Employer contributions 70,844 — 48,629 — Participants contributions — 2,768 — 2,351 Benefits paid and expenses (83,119) (11,404) (82,568) (10,738) Fair value of plan assets, December 31 2,089,491 219,873 1,799,200 200,831 Accrued benefit asset (liability), December 31 $ (535,039) $ (6,548) $ (479,083) $ (14,808) Other assets $ 25,851 $ — $ 19,396 $ — Defined benefit pension and other postretirement benefit plans liability (560,890) (6,548) (498,479) (14,808) Accrued benefit asset (liability), December 31 $ (535,039) $ (6,548) $ (479,083) $ (14,808) AOCI debit, January 1 (excluding impact of PUC D&Os) $ 503,821 $ 6,610 $ 536,920 $ 1,962 Recognized during year – prior service credit (cost) (8) 1,761 42 1,806 Recognized during year – net actuarial (losses) gains (33,456) (208) (15,479) 13 Occurring during year – net actuarial losses (gains) 87,207 (5,768) (17,662) 2,829 AOCI debit before cumulative impact of PUC D&Os, December 31 557,564 2,395 503,821 6,610 Cumulative impact of PUC D&Os (534,594) (1,177) (474,628) (7,458) AOCI debit/(credit), December 31 $ 22,970 $ 1,218 $ 29,193 $ (848) Net actuarial loss $ 557,564 $ 5,731 $ 503,813 $ 11,707 Prior service cost (gain) — (3,336) 8 (5,097) AOCI debit before cumulative impact of PUC D&Os, December 31 557,564 2,395 503,821 6,610 Cumulative impact of PUC D&Os (534,594) (1,177) (474,628) (7,458) AOCI debit/(credit), December 31 22,970 1,218 29,193 (848) Income taxes (benefits) (5,988) (313) (7,677) 219 AOCI debit/(credit), net of taxes (benefits), December 31 $ 16,982 $ 905 $ 21,516 $ (629) As of December 31, 2020 and 2019, the other postretirement benefit plans shown in the table above had APBOs in excess of plan assets. 2020 2019 (in thousands) Pension Other Pension Other Hawaiian Electric consolidated Benefit obligation, January 1 $ 2,110,904 $ 207,073 $ 1,837,653 $ 181,162 Service cost 71,604 2,515 60,461 2,191 Interest cost 75,484 7,103 77,851 7,673 Actuarial losses 260,102 9,151 212,310 25,123 Participants contributions — 2,717 — 2,311 Benefits paid and expenses (77,336) (11,485) (77,060) (11,382) Transfers — — (311) (5) Benefit obligation, December 31 2,440,758 217,074 2,110,904 207,073 Fair value of plan assets, January 1 1,640,417 197,564 1,343,113 170,862 Actual return on plan assets 276,453 27,207 326,204 34,928 Employer contributions 69,720 — 47,808 — Participants contributions — 2,717 — 2,311 Benefits paid and expenses (76,860) (11,173) (76,581) (10,532) Other — — (127) (5) Fair value of plan assets, December 31 1,909,730 216,315 1,640,417 197,564 Accrued benefit liability, December 31 $ (531,028) $ (759) $ (470,487) $ (9,509) Other liabilities (short-term) (535) (720) (518) (715) Defined benefit pension and other postretirement benefit plans liability (530,493) (39) (469,969) (8,794) Accrued benefit liability, December 31 $ (531,028) $ (759) $ (470,487) $ (9,509) AOCI debit, January 1 (excluding impact of PUC D&Os) $ 478,078 $ 5,730 $ 502,189 $ 1,551 Recognized during year – prior service credit (cost) (9) 1,758 (7) 1,803 Recognized during year – net actuarial losses (30,566) (207) (14,658) — Occurring during year – net actuarial losses (gains) 91,018 (6,100) (9,446) 2,376 AOCI debit before cumulative impact of PUC D&Os, December 31 538,521 1,181 478,078 5,730 Cumulative impact of PUC D&Os (534,594) (1,177) (474,628) (7,458) AOCI debit/(credit), December 31 $ 3,927 $ 4 $ 3,450 $ (1,728) Net actuarial loss $ 538,521 $ 4,508 $ 478,069 $ 10,815 Prior service cost (gain) — (3,327) 9 (5,085) AOCI debit before cumulative impact of PUC D&Os, December 31 538,521 1,181 478,078 5,730 Cumulative impact of PUC D&Os (534,594) (1,177) (474,628) (7,458) AOCI debit/(credit), December 31 3,927 4 3,450 (1,728) Income taxes (benefits) (1,011) (1) (888) 445 AOCI debit/(credit), net of taxes (benefits), December 31 $ 2,916 $ 3 $ 2,562 $ (1,283)
Schedule of asset allocation of plan assets	The asset allocation of defined benefit retirement plans to equity and fixed income securities (excluding cash) and related investment policy targets and ranges were as follows: Pension benefits 1 Other benefits 2 Investment policy Investment policy December 31 2020 2019 Target Range 2020 2019 Target Range Assets held by category Equity securities 72 % 71 % 70 % 65-75 73 % 71 % 70 % 65-75 Fixed income securities 28 29 30 25-35 27 29 30 25-35 100 % 100 % 100 % 100 % 100 % 100 % 1 Asset allocation (excluding cash) is applicable to only HEI and the Utilities. As of December 31, 2020 and 2019, nearly all of ASB’s pension assets were invested in fixed income securities. 2 Asset allocation (excluding cash) is applicable to only HEI and the Utilities. ASB does not fund its other benefits. Assets held in various trusts for the retirement benefit plans are measured at fair value on a recurring basis and were as follows: Pension benefits Other benefits Fair value measurements using Fair value measurements using (in millions) December 31 Quoted prices in active markets for identical assets Significant other observable inputs Significant unobservable inputs December 31 Level 1 Level 2 Level 3 2020 Equity securities $ 540 $ 540 $ — $ — $ 68 $ 68 $ — $ — Equity index and exchange-traded funds 734 734 — — 77 77 — — Equity investments at net asset value (NAV) 102 — — — 13 — — — Total equity investments 1,376 1,274 — — 158 145 — — Fixed income securities and public mutual funds 363 105 258 — 53 51 2 — Fixed income investments at NAV 278 — — — 5 — — — Total fixed income investments 641 105 258 — 58 51 2 — Cash equivalents, fund and at NAV 68 25 — — 4 3 — — Total 2,085 $ 1,404 $ 258 $ — 220 $ 199 $ 2 $ — Cash, receivables and payables, net 4 — Fair value of plan assets $ 2,089 $ 220 2019 Equity securities $ 470 $ 470 $ — $ — $ 61 $ 61 $ — $ — Equity index and exchange-traded funds 610 610 — — 69 69 — — Equity investments at NAV 78 — — — 11 — — — Total equity investments 1,158 1,080 — — 141 130 — — Fixed income securities and public mutual funds 353 123 230 — 52 49 2 — Fixed income investments at NAV 245 — — — 4 — — — Total fixed income investments 598 123 230 — 56 49 2 — Cash equivalents at NAV 39 — — — 4 — — — Total 1,795 $ 1,203 $ 230 $ — 201 $ 179 $ 2 $ — Cash, receivables and payables, net 4 — Fair value of plan assets $ 1,799 $ 201 Pension benefits Other benefits Measured at net asset value December 31 Redemption frequency Redemption notice period December 31 Redemption frequency Redemption notice period (in millions) 2020 Non U.S. equity funds (a) $ 102 Daily-Monthly 5-30 days $ 13 Daily-Monthly 5-30 days Fixed income investments (b) 278 Monthly 15 days 5 Monthly 15 days Cash equivalents (c) 43 Daily 0-1 day 1 Daily 0-1 day $ 423 $ 19 2019 Non U.S. equity funds (a) $ 78 Daily-Monthly 5-30 days $ 11 Daily-Monthly 5-30 days Fixed income investments (b) 245 Monthly 15 days 4 Monthly 15 days Cash equivalents (c) 39 Daily 0-1 day 4 Daily 0-1 day $ 362 $ 19 None of the investments presented in the tables above have unfunded commitments. (a) Represents investments in funds that primarily invest in non-U.S., emerging markets equities. Redemption frequency for pension benefits assets as of December 31, 2020 were: daily, 62% and monthly, 38%, and as of December 31, 2019 were daily, 60% and monthly, 40%. Redemption frequency for other benefits assets as of December 31, 2020 were: daily, 58% and monthly, 42% and as of December 31, 2019 were: daily, 59% and monthly, 41%. (b) Represents investments in fixed income securities invested in a US-dollar denominated fund that seeks to exceed the Barclays Capital Long Corporate A or better Index through investments in US-dollar denominated fixed income securities and commingled vehicles. (c) Represents investments in cash equivalent funds. This class includes funds that invest primarily in securities issued or guaranteed by the U.S. government or its agencies or instrumentalities. For pension benefits, the fund may also invest in fixed income securities of investment grade issuers.
Schedule of weighted-average assumptions used in accounting for plans	The following weighted-average assumptions were used in the accounting for the plans: Pension benefits Other benefits December 31 2020 2019 2018 2020 2019 2018 Benefit obligation Discount rate 1 2.92 % 3.61 % 4.31 % 2.83 % 3.52 % 4.34 % Rate of compensation increase 3.5 3.5 3.5 NA NA NA Net periodic pension/benefit cost (years ended) Discount rate 2 3.61 4.31 3.74 3.52 4.34 3.72 Expected return on plan assets 3 7.25 7.25 7.50 7.25 7.25 7.50 Rate of compensation increase 4 3.5 3.5 3.5 NA NA NA NA Not applicable 1 HEI and the Utilities pension benefits discount rate only at December 31, 2020 and 2019. ASB’s pension benefits discount rate at December 31, 2020 and 2019 was 2.76% and 3.49%, respectively. All other disclosed rates apply to the Company and the Utilities. 2 ASB’s pension benefits discount rate for the year ended December 31, 2020 was 3.49%. All other disclosed rates apply to the Company and the Utilities. 3 HEI’s and Utilities’ plan assets only. For 2020, 2019 and 2018, ASB’s expected return on plan assets was 3.69%, 4.51% and 3.94%, respectively. 4 The Company and the Utilities use a graded rate of compensation increase assumption based on age. The rate provided above is an average across all future years of service for the current population.
Schedule of components of net periodic benefit cost for consolidated HEI	The components of NPPC and NPBC were as follows: Pension benefits Other benefits (in thousands) 2020 2019 2018 2020 2019 2018 HEI consolidated Service cost $ 73,387 $ 62,135 $ 68,987 $ 2,537 $ 2,209 $ 2,721 Interest cost 81,335 84,267 77,374 7,407 8,004 7,933 Expected return on plan assets (113,800) (111,989) (108,953) (12,124) (12,356) (12,908) Amortization of net prior service gain 8 (42) (42) (1,761) (1,806) (1,805) Amortization of net actuarial losses 33,456 15,479 30,084 208 (13) 95 Net periodic pension/benefit cost 74,386 49,850 67,450 (3,733) (3,962) (3,964) Impact of PUC D&Os 20,997 48,143 25,828 3,179 3,258 3,842 Net periodic pension/benefit cost (adjusted for impact of PUC D&Os) $ 95,383 $ 97,993 $ 93,278 $ (554) $ (704) $ (122) Hawaiian Electric consolidated Service cost $ 71,604 $ 60,461 $ 67,359 $ 2,515 $ 2,191 $ 2,704 Interest cost 75,484 77,851 71,294 7,103 7,673 7,628 Expected return on plan assets (107,369) (104,632) (102,368) (11,957) (12,180) (12,713) Amortization of net prior service (gain) cost 9 7 8 (1,758) (1,803) (1,803) Amortization of net actuarial losses 30,566 14,658 27,302 207 — 98 Net periodic pension/benefit cost 70,294 48,345 63,595 (3,890) (4,119) (4,086) Impact of PUC D&Os 20,997 48,143 25,828 3,179 3,258 3,842 Net periodic pension/benefit cost (adjusted for impact of PUC D&Os) $ 91,291 $ 96,488 $ 89,423 $ (711) $ (861) $ (244)
Schedule of projected benefit obligations and assets	Additional information on the defined benefit pension plans’ accumulated benefit obligations (ABOs), which do not consider projected pay increases (unlike the PBOs shown in the table above), and pension plans with ABOs and PBOs in excess of plan assets were as follows: HEI consolidated Hawaiian Electric consolidated December 31 2020 2019 2020 2019 (in billions) Defined benefit plans - ABOs $ 2.3 $ 2.0 $ 2.1 $ 1.8 Defined benefit plans with ABO in excess of plan assets ABOs 2.1 1.9 2.1 1.8 Fair value of plan assets 2.0 1.7 1.9 1.6 Defined benefit plans with PBOs in excess of plan assets PBOs 2.5 2.2 2.4 2.1 Fair value of plan assets 2.0 1.7 1.9 1.6

Share-based compensation (Table

Share-based compensation (Tables)	12 Months Ended
	Dec. 31, 2020
Share-based Payment Arrangement [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: (in millions) 2020 2019 2018 HEI consolidated Share-based compensation expense 1 $ 5.8 $ 10.0 $ 7.8 Income tax benefit 1.0 1.4 1.1 Hawaiian Electric consolidated Share-based compensation expense 1 1.8 3.2 2.7 Income tax benefit 0.4 0.6 0.5 1 For 2020, 2019 and 2018, the Company has not capitalized any share-based compensation.
Schedule of common stock granted to nonemployee directors	HEI granted HEI common stock to nonemployee directors under the 2011 Director Plan as follows: (dollars in millions) 2020 2019 2018 Shares granted 36,100 36,344 38,821 Fair value $ 1.3 $ 1.6 $ 1.3 Income tax benefit 0.3 0.4 0.3
Schedule of restricted stock units	Information about HEI’s grants of restricted stock units was as follows: 2020 2019 2018 Shares (1) Shares (1) Shares (1) Outstanding, January 1 207,641 $ 35.36 200,358 $ 33.05 197,047 $ 31.53 Granted 78,595 47.99 96,565 37.82 93,853 34.12 Vested (77,719) 34.19 (76,813) 32.61 (75,683) 30.56 Forfeited (14,578) 36.20 (12,469) 34.20 (14,859) 32.35 Outstanding, December 31 193,939 $ 40.89 207,641 $ 35.36 200,358 $ 33.05 Total weighted-average grant-date fair value of shares granted (in millions) $ 3.8 $ 3.7 $ 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: 2020 2019 2018 Shares (1) Shares (1) Shares (1) Outstanding, January 1 96,402 $ 39.62 65,578 $ 38.81 32,904 $ 39.51 Granted 24,630 48.62 35,215 41.07 37,832 38.21 Vested (issued or unissued and cancelled) (29,409) 39.51 — — — — Forfeited (2,401) 41.22 (4,391) 39.19 (5,158) 38.84 Outstanding, December 31 89,222 $ 42.10 96,402 $ 39.62 65,578 $ 38.81 Total weighted-average grant-date fair value of shares granted (in millions) $ 1.2 $ 1.4 $ 1.4 (1) Weighted-average grant-date fair value per share determined using a Monte Carlo simulation model.
Schedule of assumptions used to determine the fair value of Long-Term Incentive Plan (LTIP) linked to total return to shareholders (TRS)	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: 2020 2019 2018 Risk-free interest rate 1.39 % 2.48 % 2.29 % Expected life in years 3 3 3 Expected volatility 13.1 % 15.8 % 17.0 % Range of expected volatility for Peer Group 13.6% to 95.4% 15.0% to 73.2% 15.1% to 26.2% Grant date fair value (per share) $ 48.62 $ 41.07 $ 38.20
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: 2020 2019 2018 Shares (1) Shares (1) Shares (1) Outstanding, January 1 403,768 $ 35.15 276,169 $ 33.80 131,616 $ 33.47 Granted 98,522 48.10 140,855 37.78 151,328 34.12 Vested (135,804) 33.48 — — — — Increase above target (cancelled) (136,163) 36.44 4,314 33.53 13,858 33.49 Forfeited (9,608) 38.36 (17,570) 34.66 (20,633) 33.80 Outstanding, December 31 220,715 $ 41.03 403,768 $ 35.15 276,169 $ 33.80 Total weighted-average grant-date fair value of shares granted (at target performance levels) (in millions) $ 4.7 $ 5.3 $ 5.2 (1) Weighted-average grant-date fair value per share based on the average price of HEI common stock on the date of grant.

Income taxes (Tables)

Income taxes (Tables)	12 Months Ended
	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Components of income taxes attributable to net income for common stock	The components of income taxes attributable to net income for common stock were as follows: HEI consolidated Hawaiian Electric consolidated Years ended December 31 2020 2019 2018 2020 2019 2018 (in thousands) Federal Current $ 23,207 $ 28,736 $ 42,903 $ 31,950 $ 21,751 $ 29,649 Deferred (4,215) (4,353) (6,099) (5,408) (7,793) (5,245) Deferred tax credits, net* 10,979 13,410 (12) 1,549 13,155 (12) 29,971 37,793 36,792 28,091 27,113 24,392 State Current 8,430 10,472 17,361 3,768 5,579 13,210 Deferred 2,509 (10,732) (3,269) 8,559 (8,491) (2,737) Deferred tax credits, net* — 14,104 (87) — 14,104 (87) 10,939 13,844 14,005 12,327 11,192 10,386 Total $ 40,910 $ 51,637 $ 50,797 $ 40,418 $ 38,305 $ 34,778 * In 2020, primarily represents federal tax credits related to Mauo’s solar-plus-storage project, deferred and amortized starting in 2020. In 2019, primarily represents federal and state credits related to Hawaiian Electric’s West Loch PV project, deferred and amortized starting in 2020.
Schedule of reconciliation of amount of income taxes computed at federal statutory rate	A reconciliation of the amount of income taxes computed at the federal statutory rate to the amount provided in the consolidated statements of income was as follows: HEI consolidated Hawaiian Electric consolidated Years ended December 31 2020 2019 2018 2020 2019 2018 (in thousands) Amount at the federal statutory income tax rate $ 50,531 $ 56,996 $ 53,437 $ 44,468 $ 41,399 $ 37,889 Increase (decrease) resulting from: State income taxes, net of federal income tax benefit 9,448 11,658 11,832 9,658 8,703 8,080 Net deferred tax asset (liability) adjustment related to the Tax Act (11,267) (9,255) (9,540) (11,267) (9,255) (9,285) Other, net (7,802) (7,762) (4,932) (2,441) (2,542) (1,906) Total $ 40,910 $ 51,637 $ 50,797 $ 40,418 $ 38,305 $ 34,778 Effective income tax rate 17.0 % 19.0 % 20.0 % 19.1 % 19.4 % 19.3 %
Schedule of deferred tax assets and liabilities	The tax effects of book and tax basis differences that give rise to deferred tax assets and liabilities were as follows: HEI consolidated Hawaiian Electric consolidated December 31 2020 2019 2020 2019 (in thousands) Deferred tax assets Regulatory liabilities, excluding amounts attributable to property, plant and equipment $ 93,684 $ 100,427 $ 93,684 $ 100,427 Operating lease liabilities 41,582 51,573 34,586 45,608 Revenue taxes 22,726 20,922 22,726 20,922 Allowance for bad debts 31,973 14,858 4,835 560 Other 1 44,127 33,106 24,741 20,259 Total deferred tax assets 234,092 220,886 180,572 187,776 Deferred tax liabilities Property, plant and equipment related 487,209 464,312 473,734 458,349 Operating lease right-of-use assets 41,370 51,542 34,586 45,608 Regulatory assets, excluding amounts attributable to property, plant and equipment 25,841 33,897 25,841 33,897 Retirement benefits 18,407 9,684 20,537 13,072 Other 56,354 40,776 23,672 14,001 Total deferred tax liabilities 629,181 600,211 578,370 564,927 Net deferred income tax liability $ 395,089 $ 379,325 $ 397,798 $ 377,151 1 As of December 31, 2020, HEI consolidated and Hawaiian Electric consolidated have deferred tax assets of $10.9 million and $5.8 million respectively, relating to the benefit of state tax credit carryforwards of $14.6 million and $7.8 million respectively. These state tax credit carryforwards primarily relate to the West Loch PV project and do not expire. The Company concluded that as of December 31, 2020, a valuation allowance is not required.
Schedule of changes in total unrecognized tax benefits	The following is a reconciliation of the Company’s liability for unrecognized tax benefits for 2020, 2019 and 2018. HEI consolidated Hawaiian Electric consolidated (in millions) 2020 2019 2018 2020 2019 2018 Unrecognized tax benefits, January 1 $ 2.2 $ 2.1 $ 4.0 $ 1.7 $ 1.6 $ 3.5 Additions based on tax positions taken during the year 0.2 0.5 0.3 0.2 0.5 0.3 Reductions based on tax positions taken during the year — — — — — — Additions for tax positions of prior years 11.6 0.1 0.1 11.6 0.1 0.1 Reductions for tax positions of prior years (0.1) (0.2) (0.1) (0.1) (0.2) (0.1) Lapses of statute of limitations (0.2) (0.3) (2.2) (0.2) (0.3) (2.2) Settlement (1.0) — — (0.5) — — Unrecognized tax benefits, December 31 $ 12.7 $ 2.2 $ 2.1 $ 12.7 $ 1.7 $ 1.6

Cash flows (Tables)

Cash flows (Tables)	12 Months Ended
	Dec. 31, 2020
Supplemental Cash Flow Elements [Abstract]
Schedule of supplemental disclosures of cash and noncash activity	Years ended December 31 2020 2019 2018 (in millions) Supplemental disclosures of cash flow information HEI consolidated Interest paid to non-affiliates, net of amounts capitalized $ 98 $ 107 $ 102 Income taxes paid (including refundable credits) 32 56 72 Income taxes refunded (including refundable credits) 3 4 34 Hawaiian Electric consolidated Interest paid to non-affiliates, net of amounts capitalized 65 68 73 Income taxes paid (including refundable credits) 41 55 64 Income taxes refunded (including refundable credits) 3 4 31 Supplemental disclosures of noncash activities HEI consolidated Unpaid invoices and accruals for capital expenditures, balance, end of period (investing) 44 64 59 Right-of-use assets obtained in exchange for operating lease obligations (investing) 26 7 — Common stock issued (gross) for director and executive/management compensation (financing) 1 16 5 4 Obligations to fund low income housing investments, net (investing) 25 11 12 Transfer of retail repurchase agreements to deposit liabilities (financing) — — 102 Hawaiian Electric consolidated Unpaid invoices and accruals for capital expenditures, balance, end of period (investing) 41 62 44 Right-of-use assets obtained in exchange for operating lease obligations (investing) 17 2 — HEI Consolidated and Hawaiian Electric consolidated Electric utility property, plant and equipment Estimated fair value of noncash contributions in aid of construction (investing) 10 9 14 Acquisition of Hawaiian Telcom’s interest in joint poles (investing) — — 48 Reduction of long-term debt from funds previously transferred for repayment (financing) 82 — — 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)	12 Months Ended
	Dec. 31, 2020
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. Estimated fair value (in thousands) Carrying or notional Quoted prices in active markets for identical assets Significant other observable inputs Significant unobservable inputs Total December 31, 2020 Financial assets HEI consolidated Available-for-sale investment securities $ 1,970,417 $ — $ 1,943,232 $ 27,185 $ 1,970,417 Held-to-maturity investment securities 226,947 — 229,963 — 229,963 Stock in Federal Home Loan Bank 8,680 — 8,680 — 8,680 Loans, net 5,260,917 — 28,354 5,410,976 5,439,330 Mortgage servicing rights 10,020 — 10,705 10,705 Derivative assets 120,980 — 4,536 — 4,536 Financial liabilities HEI consolidated Deposit liabilities 548,830 — 552,800 — 552,800 Short-term borrowings—other than bank 129,379 — 129,379 — 129,379 Other bank borrowings 89,670 — 89,669 — 89,669 Long-term debt, net—other than bank 2,119,129 — 2,487,790 — 2,487,790 Derivative liabilities 137,500 500 4,530 — 5,030 Hawaiian Electric consolidated Short-term borrowings 49,979 — 49,979 — 49,979 Long-term debt, net 1,561,302 — 1,890,490 — 1,890,490 December 31, 2019 Financial assets HEI consolidated Available-for-sale investment securities $ 1,232,826 $ — $ 1,204,229 $ 28,597 $ 1,232,826 Held-to-maturity investment securities 139,451 — 143,467 — 143,467 Stock in Federal Home Loan Bank 8,434 — 8,434 — 8,434 Loans, net 5,080,107 — 12,295 5,145,242 5,157,537 Mortgage servicing rights 9,101 — — 12,379 12,379 Derivative assets 25,179 — 300 — 300 Financial liabilities HEI consolidated Deposit liabilities 769,825 — 765,976 — 765,976 Short-term borrowings—other than bank 185,710 — 185,710 — 185,710 Other bank borrowings 115,110 — 115,107 — 115,107 Long-term debt, net—other than bank 1,964,365 2,156,927 2,156,927 Derivative liabilities 51,375 33 2,185 — 2,218 Hawaiian Electric consolidated Short-term borrowings 88,987 — 88,987 — 88,987 Long-term debt, net 1,497,667 — 1,670,189 — 1,670,189
Schedule of assets and liabilities measured at fair value on a recurring basis	Assets and liabilities measured at fair value on a recurring basis were as follows: December 31 2020 2019 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-backed securities — issued or guaranteed by U.S. Government agencies or sponsored agencies $ — $ 1,849,559 $ — $ — $ 1,026,385 $ — U.S. Treasury and federal agency obligations — 62,322 — — 117,787 — Corporate bonds — 31,351 — — 60,057 — Mortgage revenue bonds — — 27,185 — — 28,597 $ — $ 1,943,232 $ 27,185 $ — $ 1,204,229 $ 28,597 Derivative assets Interest rate lock commitments (bank segment) 1 $ — $ 4,536 $ — $ — $ 297 $ — Forward commitments (bank segment) 1 — — — — 3 — $ — $ 4,536 $ — $ — $ 300 $ — Derivative liabilities Forward commitments (bank segment) 1 $ 500 $ — $ — $ 33 $ 12 $ — Interest rate swap (Other segment) 2 — 4,530 — — 2,173 — $ 500 $ 4,530 $ — $ 33 $ 2,185 $ — 1 Derivatives are carried at fair value in other assets or other liabilities in the balance sheets with changes in value included in mortgage banking income. 2 Derivatives are included in Other liabilities in the balance sheets.
Schedule of 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: (in thousands) 2020 2019 Mortgage revenue bonds Balance, January 1 $ 28,597 $ 23,636 Principal payments received (1,641) — Purchases 229 4,961 Unrealized gain (loss) included in other comprehensive income — — Balance, December 31 $ 27,185 $ 28,597
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 using (in thousands) Balance Level 1 Level 2 Level 3 December 31, 2020 Loans $ 387 $ — $ — $ 387 Mortgage servicing rights 3,001 — — 3,001 December 31, 2019 Loans 25 — — 25
Schedule of significant unobservable inputs used in the fair value measurement	Key assumptions used in estimating the fair value of ASB’s MSRs used in the impairment analysis were as follows: December 31 2020 2019 (dollars in thousands) Unpaid principal balance $ 1,450,312 $ 1,276,437 Weighted average note rate 3.68 % 3.96 % Weighted average discount rate 9.25 % 9.25 % Weighted average prepayment speed 17.7 % 11.4 % 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 (dollars in thousands) Fair value Valuation technique Significant unobservable input Range Weighted December 31, 2020 Commercial loan $ 387 Fair value of collateral Appraised value less selling cost N/A (2) N/A (2) Mortgage servicing rights $ 3,001 Discounted cash flow Prepayment speed 15-22% 22% Discount rate 9.3% December 31, 2019 Residential land $ 25 Fair value of collateral Appraised value less selling cost N/A (2) N/A (2) (1) Represent percent of outstanding principal balance. (2) N/A - Not applicable. There is one asset in each fair value measurement type.

Quarterly information (unaudi_2

Quarterly information (unaudited) (Tables)	12 Months Ended
	Dec. 31, 2020
Quarterly Financial Information Disclosure [Abstract]
Schedule of selected quarterly information	Selected quarterly information was as follows: Quarters ended Years ended (in thousands, except per share amounts) March 31 June 30 Sept. 30 Dec. 31 December 31 HEI consolidated 2020 Revenues $ 677,186 $ 608,945 $ 641,427 $ 652,217 $ 2,579,775 Operating income 59,702 71,556 99,561 80,674 311,493 Net income 33,893 49,360 65,503 50,958 199,714 Net income for common stock 33,420 48,887 65,032 50,485 197,824 Basic earnings per common share 2 0.31 0.45 0.60 0.46 1.81 Diluted earnings per common share 3 0.31 0.45 0.59 0.46 1.81 Dividends per common share 0.33 0.33 0.33 0.33 1.32 2019 Revenues $ 661,615 $ 715,485 $ 770,882 $ 725,966 $ 2,873,948 Operating income 1 77,937 72,634 96,655 100,795 348,021 Net income 1 46,161 42,985 63,890 66,736 219,772 Net income for common stock 1 45,688 42,512 63,419 66,263 217,882 Basic earnings per common share 1,2 0.42 0.39 0.58 0.61 2.00 Diluted earnings per common share 1,3 0.42 0.39 0.58 0.61 1.99 Dividends per common share 0.32 0.32 0.32 0.32 1.28 Hawaiian Electric consolidated 2020 Revenues $ 597,442 $ 534,215 $ 562,568 $ 571,095 $ 2,265,320 Operating income 43,958 67,801 88,518 68,273 268,550 Net income 24,404 42,828 60,563 43,540 171,335 Net income for common stock 23,905 42,329 60,065 43,041 169,340 2019 Revenues $ 578,495 $ 633,784 $ 688,330 $ 645,333 2,545,942 Operating income 56,560 55,694 71,793 70,331 254,378 Net income 32,625 33,073 47,277 45,860 158,835 Net income for common stock 32,126 32,574 46,779 45,361 156,840 Note: HEI owns all of Hawaiian Electric’s common stock, therefore per share data for Hawaiian Electric is not meaningful. 1 Operating income for the fourth quarter of 2019 includes gains on property sales totaling $10.8 million, and net income and net income for common stock includes $7.9 million (or $0.07 per share (basic and diluted) at ASB’s 26.8% statutory tax rate). 2 The quarterly basic earnings per common share are based upon the weighted-average number of shares of common stock outstanding in each quarter. 3 The quarterly diluted earnings per common share are based upon the weighted-average number of shares of common stock outstanding in each quarter plus the dilutive incremental shares at quarter end.

Summary of significant accoun_4

Summary of significant accounting policies - General, Cash, and PPE (Details) $ in Thousands	Feb. 02, 2018MWhMW	Nov. 24, 2017MW	Dec. 31, 2020USD ($)MWhMW	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Significant Accounting Policies [Line Items]
Restricted cash | $			$ 17,558	$ 30,872	$ 0
Hawaiian Electric Company, Inc. and Subsidiaries
Significant Accounting Policies [Line Items]
Composite annual depreciation rate			3.20%	3.20%	3.20%
Minimum
Significant Accounting Policies [Line Items]
Estimated useful life under production plant (in years)			16 years
Estimated useful life under transmission and distribution plant (in years)			10 years
Estimated useful life under general plant (in years)			5 years
Maximum
Significant Accounting Policies [Line Items]
Estimated useful life under production plant (in years)			51 years
Estimated useful life under transmission and distribution plant (in years)			79 years
Estimated useful life under general plant (in years)			50 years
Hamakua Energy
Significant Accounting Policies [Line Items]
Power produced by power plants (in megawatts) | MW		60	60
Mauo, LLC
Significant Accounting Policies [Line Items]
Power produced by power plants (in megawatts) | MW	8.6		8.6
Power storage capacity (in megawatt hours) | MWh	42.3		42.3
American Savings Bank (ASB)
Significant Accounting Policies [Line Items]
Reserve requirement | $			$ 0	$ 26,200

Summary of significant accoun_5

Summary of significant accounting policies - Earnings per share (HEI only) (Details) - shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accounting Policies [Abstract]
Antidilutive securities outstanding (in shares)	0	0	0

Summary of significant accoun_6

Summary of significant accounting policies - Recent Accounting Pronouncements Narrative (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Jan. 01, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses	$ 101,201		$ 53,355	$ 52,119	$ 53,637
Allowance for loan commitments	4,300		1,741
Decrease to retained earnings	$ (660,398)	$ (622,042)	(622,042)
Impact of ASU No. 2016-13
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses		21,000	19,441
Allowance for loan commitments		2,000	$ 1,559
Decrease to retained earnings		$ 15,372

Summary of significant accoun_7

Summary of significant accounting policies - Changes In Accounting Standard Updates (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Jan. 01, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses	$ 101,201		$ 53,355	$ 52,119	$ 53,637
Allowance for loan commitments	4,300		1,741
Retained earnings	660,398	$ 622,042	622,042
Loans and leases receivable before fees, gross	5,232,642	5,067,821	5,067,821
Total assets	15,004,007	13,745,251	13,745,251	13,104,051
Deferred income taxes	395,089	379,324	379,324
Other	618,438	583,545	583,545
Total liabilities	12,632,212	11,430,698	11,430,698
Total shareholders’ equity	2,337,502	2,280,260	2,280,260	$ 2,162,280	$ 2,097,386
Total liabilities and shareholders’ equity	$ 15,004,007	13,745,251	13,745,251
Impact of ASU No. 2016-13
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses		21,000	19,441
Allowance for loan commitments		2,000	1,559
Retained earnings		(15,372)
Loans and leases receivable before fees, gross		(19,441)
Total assets		(19,441)
Deferred income taxes		(5,628)
Other		1,559
Total liabilities		(4,069)
Total shareholders’ equity		(15,372)	(15,372)
Total liabilities and shareholders’ equity		(19,441)
As reported under ASU No. 2016-13
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings		606,670
Loans and leases receivable before fees, gross		5,048,380
Total assets		13,725,810
Deferred income taxes		373,696
Other		585,104
Total liabilities		11,426,629
Total shareholders’ equity		2,264,888	$ 2,264,888
Total liabilities and shareholders’ equity		$ 13,725,810

Summary of significant accoun_8

Summary of significant accounting policies - Accounts Receivable and Additional Information (Details)	12 Months Ended
	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Goodwill and other intangibles
Goodwill	$ 82,190,000	$ 82,190,000
Valuation, Income Approach | Measurement Input, Terminal Value
Goodwill and other intangibles
Goodwill impairment, measurement input	0.75
Valuation, Publicly Traded Company Method
Goodwill and other intangibles
Goodwill impairment, measurement input	0.20
Valuation, Sale Transaction Method
Goodwill and other intangibles
Goodwill impairment, measurement input	0.05
American Savings Bank (ASB)
Loans modified in a troubled debt restructuring
Number of consecutive months of repayment required for loans to be removed from nonaccrual status	6 months
Goodwill and other intangibles
Goodwill	$ 82,190,000	82,190,000
Goodwill impairment	0	0	$ 0
Low-income housing investments	83,435,000	66,302,000
Commitments to fund affordable housing investments	$ 41,000,000	23,400,000
American Savings Bank (ASB) | Measurement Band A
Goodwill and other intangibles
Risks inherent in servicing assets and servicing liabilities band percent for risk categorization	0.50%
American Savings Bank (ASB) | Measurement Band B
Goodwill and other intangibles
Risks inherent in servicing assets and servicing liabilities band percent for risk categorization	1.00%
American Savings Bank (ASB) | Loans receivable
Nonperforming loans
Period for classification as delinquent	90 days
American Savings Bank (ASB) | Mortgage receivable
Nonperforming loans
Period for classification as delinquent	180 days
American Savings Bank (ASB) | Consumer
Nonperforming loans
Period for write-off	120 days
Hawaiian Electric Company, Inc. and Subsidiaries
Accounts Receivable
Allowance for customer accounts receivable, accrued unbilled revenues and other accounts receivable	$ 17,800,000	$ 1,400,000
Electric utility revenues
Weighted average AFUDC rate	7.10%	7.40%	7.30%

Summary of significant accoun_9

Summary of significant accounting policies - Summary of Income Tax Expense Related to Investment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Amounts in income taxes related to low-income housing tax credit investments
Net benefit to income tax expense	$ (40,910)	$ (51,637)	$ (50,797)
American Savings Bank (ASB)
Amounts in income taxes related to low-income housing tax credit investments
Net benefit to income tax expense	(11,688)	(23,061)	(24,069)
American Savings Bank (ASB) | Variable Interest Entity, Not Primary Beneficiary
Amounts in income taxes related to low-income housing tax credit investments
Amortization recognized in the provision for income taxes	(9,600)	(7,900)	(7,700)
Tax credits and other tax benefits recognized in the provision for income taxes	13,700	11,900	10,900
Net benefit to income tax expense	$ 4,100	$ 4,000	$ 3,200

Segment financial information_2

Segment financial information (Details) $ in Thousands	Feb. 02, 2018MWhMW	Nov. 24, 2017MW	Dec. 31, 2020USD ($)	Sep. 30, 2020USD ($)	Jun. 30, 2020USD ($)	Mar. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Sep. 30, 2019USD ($)	Jun. 30, 2019USD ($)	Mar. 31, 2019USD ($)	Dec. 31, 2020USD ($)MWhMW	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Jan. 01, 2020USD ($)
Segment financial information
Revenues			$ 652,217	$ 641,427	$ 608,945	$ 677,186	$ 725,966	$ 770,882	$ 715,485	$ 661,615	$ 2,579,775	$ 2,873,948	$ 2,860,849
Depreciation and amortization											290,778	278,113	255,629
Interest expense, net											99,808	109,339	104,216
Income (loss) before income taxes											240,624	271,409	254,461
Income taxes (benefit)											40,910	51,637	50,797
Net income (loss)			50,958	65,503	49,360	33,893	66,736	63,890	42,985	46,161	199,714	219,772	203,664
Preferred stock dividends of subsidiaries											1,890	1,890	1,890
Net income for common stock			50,485	$ 65,032	$ 48,887	$ 33,420	66,263	$ 63,419	$ 42,512	$ 45,688	197,824	217,882	201,774
Capital expenditures											383,895	457,520	537,369
Total assets			15,004,007				13,745,251				15,004,007	13,745,251	13,104,051	$ 13,745,251
Electric utility
Segment financial information
Revenues											2,265,320	2,545,942	2,546,525
Depreciation and amortization											256,479	245,362	230,228
Interest expense, net											67,794	70,842	73,348
Income (loss) before income taxes											211,753	197,140	180,426
Income taxes (benefit)											40,418	38,305	34,778
Net income (loss)											171,335	158,835	145,648
Preferred stock dividends of subsidiaries											1,995	1,995	1,995
Net income for common stock											169,340	156,840	143,653
Capital expenditures											350,864	419,898	415,264
Total assets			6,457,373				6,388,682				6,457,373	6,388,682	5,967,503
Bank
Segment financial information
Revenues											313,511	327,917	314,275
Depreciation and amortization											29,349	28,675	21,443
Interest expense, net											11,114	18,440	15,539
Income (loss) before income taxes											69,271	112,034	106,578
Income taxes (benefit)											11,688	23,061	24,069
Net income (loss)											57,583	88,973	82,509
Preferred stock dividends of subsidiaries											0	0	0
Net income for common stock											57,583	88,973	82,509
Capital expenditures											12,203	24,175	72,666
Total assets			8,396,533				7,233,017				8,396,533	7,233,017	7,027,894
Other
Segment financial information
Revenues											944	89	49
Depreciation and amortization											4,950	4,076	3,958
Interest expense, net											20,900	20,057	15,329
Income (loss) before income taxes											(40,400)	(37,765)	(32,543)
Income taxes (benefit)											(11,196)	(9,729)	(8,050)
Net income (loss)											(29,204)	(28,036)	(24,493)
Preferred stock dividends of subsidiaries											(105)	(105)	(105)
Net income for common stock											(29,099)	(27,931)	(24,388)
Capital expenditures											20,828	13,447	18,840
Total assets			$ 150,101				$ 123,552				150,101	123,552	108,654
Operating Segments | Electric utility
Segment financial information
Revenues											2,265,281	2,545,865	2,546,472
Operating Segments | Bank
Segment financial information
Revenues											313,511	327,917	314,275
Operating Segments | Other
Segment financial information
Revenues											983	166	102
Intersegment eliminations
Segment financial information
Revenues											0	0	0
Intersegment eliminations | Electric utility
Segment financial information
Revenues											39	77	53
Intersegment eliminations | Bank
Segment financial information
Revenues											0	0	0
Intersegment eliminations | Other
Segment financial information
Revenues											$ (39)	$ (77)	$ (53)
Hamakua Energy
Segment financial information
Power produced by power plants (in megawatts) | MW		60									60
Mauo, LLC
Segment financial information
Power produced by power plants (in megawatts) | MW	8.6										8.6
Power storage capacity (in megawatt hours) | MWh	42.3										42.3
Power purchase agreement term	15 years
Power purchase agreement extension term	5 years

Electric utility segment - Regu

Electric utility segment - Regulatory Assets and Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Regulatory assets
Regulatory assets	$ 766,708	$ 715,080
Regulatory liabilities
Regulatory liabilities	$ 959,786	972,310
Minimum | Income taxes
Regulatory liabilities
Authorized amortization or recovery periods	1 year
Minimum | Decoupling revenue balancing account and RAM
Regulatory liabilities
Authorized amortization or recovery periods	1 year
Maximum | Income taxes
Regulatory liabilities
Authorized amortization or recovery periods	55 years
Maximum | Decoupling revenue balancing account and RAM
Regulatory liabilities
Authorized amortization or recovery periods	2 years
Hawaiian Electric Company, Inc. and Subsidiaries
Regulatory assets
Regulatory assets	$ 766,708	715,080
Regulatory liabilities
Regulatory liabilities	959,786	972,310
Hawaiian Electric Company, Inc. and Subsidiaries | Cost of removal in excess of salvage value
Regulatory liabilities
Regulatory liabilities	541,730	521,977
Hawaiian Electric Company, Inc. and Subsidiaries | Income taxes
Regulatory liabilities
Regulatory liabilities	360,426	386,990
Hawaiian Electric Company, Inc. and Subsidiaries | Decoupling revenue balancing account and RAM
Regulatory liabilities
Regulatory liabilities	1,957	16,370
Hawaiian Electric Company, Inc. and Subsidiaries | Retirement benefit plans
Regulatory liabilities
Regulatory liabilities	29,759	21,707
Hawaiian Electric Company, Inc. and Subsidiaries | Other
Regulatory liabilities
Regulatory liabilities	$ 25,914	25,266
Hawaiian Electric Company, Inc. and Subsidiaries | Minimum | Cost of removal in excess of salvage value
Regulatory liabilities
Authorized amortization or recovery periods	1 year
Hawaiian Electric Company, Inc. and Subsidiaries | Minimum | Other
Regulatory liabilities
Remaining amortization or recovery periods	1 year
Hawaiian Electric Company, Inc. and Subsidiaries | Maximum | Cost of removal in excess of salvage value
Regulatory liabilities
Authorized amortization or recovery periods	79 years
Hawaiian Electric Company, Inc. and Subsidiaries | Maximum | Other
Regulatory liabilities
Remaining amortization or recovery periods	18 years
Hawaiian Electric Company, Inc. and Subsidiaries | Current assets
Regulatory assets
Regulatory assets	$ 30,435	30,710
Hawaiian Electric Company, Inc. and Subsidiaries | Long-term assets
Regulatory assets
Regulatory assets	736,273	684,370
Hawaiian Electric Company, Inc. and Subsidiaries | Current liabilities
Regulatory liabilities
Regulatory liabilities	37,301	30,724
Hawaiian Electric Company, Inc. and Subsidiaries | Long-term liabilities
Regulatory liabilities
Regulatory liabilities	922,485	941,586
Hawaiian Electric Company, Inc. and Subsidiaries | Retirement benefit plans (balance primarily varies with plans’ funded statuses)
Regulatory assets
Regulatory assets	592,644	554,485
Hawaiian Electric Company, Inc. and Subsidiaries | Income taxes
Regulatory assets
Regulatory assets	$ 96,171	102,612
Hawaiian Electric Company, Inc. and Subsidiaries | Income taxes | Minimum
Regulatory assets
Authorized amortization or recovery periods	1 year
Hawaiian Electric Company, Inc. and Subsidiaries | Income taxes | Maximum
Regulatory assets
Authorized amortization or recovery periods	55 years
Hawaiian Electric Company, Inc. and Subsidiaries | Decoupling revenue balancing account and RAM
Regulatory assets
Regulatory assets	$ 10,432	0
Hawaiian Electric Company, Inc. and Subsidiaries | Decoupling revenue balancing account and RAM | Minimum
Regulatory assets
Authorized amortization or recovery periods	1 year
Hawaiian Electric Company, Inc. and Subsidiaries | Decoupling revenue balancing account and RAM | Maximum
Regulatory assets
Authorized amortization or recovery periods	2 years
Hawaiian Electric Company, Inc. and Subsidiaries | Unamortized expense and premiums on retired debt and equity issuances
Regulatory assets
Regulatory assets	$ 8,654	10,228
Hawaiian Electric Company, Inc. and Subsidiaries | Unamortized expense and premiums on retired debt and equity issuances | Minimum
Regulatory assets
Authorized amortization or recovery periods	1 year
Remaining amortization or recovery periods	1 year
Hawaiian Electric Company, Inc. and Subsidiaries | Unamortized expense and premiums on retired debt and equity issuances | Maximum
Regulatory assets
Authorized amortization or recovery periods	19 years
Remaining amortization or recovery periods	18 years
Hawaiian Electric Company, Inc. and Subsidiaries | Vacation earned, but not yet taken
Regulatory assets
Regulatory assets	$ 15,665	12,535
Authorized amortization or recovery periods	1 year
Hawaiian Electric Company, Inc. and Subsidiaries | COVID-19 related costs (to be determined by PUC)
Regulatory assets
Regulatory assets	$ 18,032	0
Hawaiian Electric Company, Inc. and Subsidiaries | Other
Regulatory assets
Regulatory assets	$ 25,110	$ 35,220
Hawaiian Electric Company, Inc. and Subsidiaries | Other | Minimum
Regulatory assets
Remaining amortization or recovery periods	1 year
Hawaiian Electric Company, Inc. and Subsidiaries | Other | Maximum
Regulatory assets
Remaining amortization or recovery periods	39 years

Electric utility segment - Majo

Electric utility segment - Major Customers (Details) - Hawaiian Electric Company, Inc. and Subsidiaries - Operating revenues - Customer concentration - Various federal government agencies - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Major customers
Operating revenues percentage	11.00%	11.00%	11.00%
Operating revenues amount	$ 249	$ 281	$ 273

Electric utility segment - Cumu

Electric utility segment - Cumulative Preferred Stock (Details)	Dec. 31, 2020$ / shares
Series C, D, E, H, J and K Preferred Stock | Hawaiian Electric
Class of Stock [Line Items]
Voluntary liquidation price (in dollars per share)	$ 20
Redemption price (in dollars per share)	21
Series I Preferred Stock | Hawaiian Electric
Class of Stock [Line Items]
Voluntary liquidation price (in dollars per share)	20
Redemption price (in dollars per share)	20
Series G Preferred Stock | Hawaii Electric Light Company, Inc. (HELCO)
Class of Stock [Line Items]
Voluntary liquidation price (in dollars per share)	100
Redemption price (in dollars per share)	100
Series H Preferred Stock | Maui Electric Company, Limited (MECO)
Class of Stock [Line Items]
Voluntary liquidation price (in dollars per share)	100
Redemption price (in dollars per share)	$ 100

Electric utility segment - Rela

Electric utility segment - Related-Party Transactions (Details) - Hawaiian Electric (parent only) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Hawaiian Electric Company, Inc. and Subsidiaries
Related Party Transaction [Line Items]
Amount charged to subsidiaries for general management and administrative services	$ 5,600,000	$ 6,000,000	$ 5,900,000
Short-term borrowings due to related party	0	0
HELCO | Hamakua Energy
Related Party Transaction [Line Items]
Amount charged to subsidiaries for general management and administrative services	$ 50,000,000	$ 68,000,000

Electric utility segment - Unco

Electric utility segment - Unconsolidated Variable Interest Entities (Details)	Sep. 15, 2020agreement	Dec. 31, 2020entityagreement
Variable Interest Entity [Line Items]
Number of unconsolidated VIEs		3
Subsidiaries
Variable Interest Entity [Line Items]
Number of power purchase agreements (PPAs) (in agreements) | agreement		4
Hawaiian Electric Company, Inc. and Subsidiaries
Variable Interest Entity [Line Items]
Number of power purchase agreements (PPAs) (in agreements) | agreement	8	4
Number of entities owning wind farms not required to be consolidated as VIE's		2
Minimum potential number of IPP entities consolidated into company in the future		1

Electric utility segment - Powe

Electric utility segment - Power Purchase Agreements (Details) $ in Thousands	Sep. 15, 2020agreement	Jul. 31, 2018MW	May 31, 2018MW	Jun. 30, 2015MW	May 31, 2012MW	Mar. 31, 1988MW	Dec. 31, 2020USD ($)agreementMW	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Dec. 31, 1988MW
Molokai New Energy Partners
Regulatory Projects and Legal Obligations [Line Items]
Total contracted PV capacity (in megawatts) | MW		4.88
Total contracted battery energy storage system capacity | MW		3
Maximum power volume to be delivered (in megawatts) | MW		2.64
Hawaiian Electric Company, Inc. and Subsidiaries
Regulatory Projects and Legal Obligations [Line Items]
Purchased power							$ 568,749	$ 633,256	$ 639,307
Number of power purchase agreements (PPAs) (in agreements) | agreement	8						4
Power purchase capacity excluding agreements with smaller IPPs (in megawatts) | MW							516.5
Expected fixed capacity charges, 2021							$ 93,000
Expected fixed capacity charges, 2022							72,000
Expected fixed capacity charges, 2023							30,000
Expected fixed capacity charges, 2024							30,000
Expected fixed capacity charges, 2025							30,000
Expected fixed capacity charges, 2026-2033							188,000
Hawaiian Electric Company, Inc. and Subsidiaries | Kalaeloa
Regulatory Projects and Legal Obligations [Line Items]
Purchase commitment, minimum power volume required to be purchased | MW										208
Hawaiian Electric Company, Inc. and Subsidiaries | AES Hawaii
Regulatory Projects and Legal Obligations [Line Items]
Purchase commitment, minimum power volume required to be purchased | MW						180
Purchase commitment, period						30 years
Purchase commitment, arbitration, additional capacity requirement | MW				9
Hawaiian Electric Company, Inc. and Subsidiaries | Hu Honua Bioenergy
Regulatory Projects and Legal Obligations [Line Items]
Purchase commitment, minimum power volume required to be purchased | MW					21.5
Hawaiian Electric Company, Inc. and Subsidiaries | Kalaeloa
Regulatory Projects and Legal Obligations [Line Items]
Purchased power							149,000	214,000	216,000
Hawaiian Electric Company, Inc. and Subsidiaries | AES Hawaii
Regulatory Projects and Legal Obligations [Line Items]
Purchased power							133,000	139,000	140,000
Hawaiian Electric Company, Inc. and Subsidiaries | HPOWER
Regulatory Projects and Legal Obligations [Line Items]
Purchased power							70,000	76,000	69,000
Hawaiian Electric Company, Inc. and Subsidiaries | Hamakua Energy
Regulatory Projects and Legal Obligations [Line Items]
Purchased power							50,000	68,000	56,000
Hawaiian Electric Company, Inc. and Subsidiaries | Puna Geothermal Venture
Regulatory Projects and Legal Obligations [Line Items]
Purchased power							1,000	0	15,000
Hawaiian Electric Company, Inc. and Subsidiaries | Wind IPPs
Regulatory Projects and Legal Obligations [Line Items]
Purchased power							105,000	95,000	107,000
Hawaiian Electric Company, Inc. and Subsidiaries | Solar IPPs
Regulatory Projects and Legal Obligations [Line Items]
Purchased power							57,000	36,000	29,000
Hawaiian Electric Company, Inc. and Subsidiaries | Other IPPs
Regulatory Projects and Legal Obligations [Line Items]
Purchased power							$ 4,000	$ 5,000	$ 7,000
PGV Facility
Regulatory Projects and Legal Obligations [Line Items]
Power purchase capacity excluding agreements with smaller IPPs (in megawatts) | MW			34.6

Electric utility segment - Util

Electric utility segment - Utility Projects (Details)	Jun. 10, 2019USD ($)	Aug. 11, 2016USD ($)	Dec. 31, 2020USD ($)MWh	Nov. 30, 2019USD ($)MW	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Regulatory Projects and Legal Obligations [Line Items]
Project costs, amortization			$ 1,300,000		$ 1,300,000
Federal
Regulatory Projects and Legal Obligations [Line Items]
Tax credit deferral period					25 years
State
Regulatory Projects and Legal Obligations [Line Items]
Tax credit deferral period					10 years
Hawaiian Electric Company, Inc. and Subsidiaries
Regulatory Projects and Legal Obligations [Line Items]
Regulatory liabilities			37,301,000		$ 37,301,000	$ 30,724,000
Hawaiian Electric Company, Inc. and Subsidiaries | ERP/EAM Implementation Project
Regulatory Projects and Legal Obligations [Line Items]
ERP/EAM cost recovery cap		$ 77,600,000
ERP/EAM required pass-through savings		$ 246,000,000
ERP/EAM project service period (in years)	12 years	12 years			12 years
Weighted average AFUDC rate		1.75%
ERP/EAM implementation project costs, accrued carrying costs once put into service			58,800,000		$ 58,800,000
ERP/EAM implementation project, expected future O&M expense reductions	$ 150,000,000
ERP/EAM implementation project, future cost avoidance related to capital costs and tax costs	$ 96,000,000
ERP/EAM regulatory liability for operation and maintenance expense reductions			10,800,000		10,800,000
Hawaiian Electric Company, Inc. and Subsidiaries | West Loch PV Project
Regulatory Projects and Legal Obligations [Line Items]
Solar project, energy production (in megawatts) | MW				20
Solar project, project cap				$ 67,000,000
Solar project, project cap for in-kind work				$ 4,700,000
Solar project, cost incurred			53,300,000		53,300,000
Federal nonrefundable tax credits			14,700,000		14,700,000
State nonrefundable tax credits			$ 14,000,000		$ 14,000,000
Solar project, maximum energy costs (in dollars per KWH)					9.56
Annual production target (megawatt per hour) | MWh			46,850
Regulatory liabilities			$ 600,000		$ 600,000
Hawaiian Electric | ERP/EAM Implementation Project
Regulatory Projects and Legal Obligations [Line Items]
ERP/EAM regulatory liability for operation and maintenance expense reductions			6,900,000		6,900,000
HELCO | ERP/EAM Implementation Project
Regulatory Projects and Legal Obligations [Line Items]
ERP/EAM regulatory liability for operation and maintenance expense reductions			1,600,000		1,600,000
Maui Electric | ERP/EAM Implementation Project
Regulatory Projects and Legal Obligations [Line Items]
ERP/EAM regulatory liability for operation and maintenance expense reductions			$ 2,300,000		$ 2,300,000
Regulatory liability, amortization period					5 years

Electric utility segment - Envi

Electric utility segment - Environmental Regulation (Details) $ in Millions	Dec. 31, 2020USD ($)
Maui Electric Company, Limited (MECO)
Environmental regulation
Additional accrued investigation and estimated cleanup costs	$ 2.7
PCB Contamination | Hawaiian Electric
Environmental regulation
Accrual for environmental loss contingencies	$ 10

Electric utility segment - Asse

Electric utility segment - Asset retirement obligations (Details) - Hawaiian Electric Company, Inc. and Subsidiaries - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Regulatory Projects and Legal Obligations [Line Items]
ARO, recognition impact on earnings	$ 0
Changes in the asset retirement obligation liability
Balance at the beginning of the period	10,324,000	$ 8,426,000
Accretion expense	405,000	312,000
Liabilities incurred	0	1,594,000
Liabilities settled	(37,000)	(8,000)
Balance at the end of the period	$ 10,692,000	$ 10,324,000

Electric utility segment - Re_2

Electric utility segment - Regulatory Proceedings (Details)	Dec. 23, 2020USD ($)	Sep. 15, 2020agreement	Jun. 05, 2020USD ($)	Apr. 27, 2017USD ($)	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Feb. 28, 2019USD ($)	Dec. 31, 2020USD ($)MWhagreement	Dec. 31, 2019USD ($)contract	Dec. 31, 2018$ / kWh	Oct. 22, 2020	Jul. 09, 2020entity
Regulatory Projects and Legal Obligations [Line Items]
Advanced Metering Infrastructure Utilization PIM, annual maximum reward					$ 2,000,000			$ 2,000,000
Hawaiian Electric Company, Inc. and Subsidiaries
Regulatory Projects and Legal Obligations [Line Items]
Multi-year rate period	5 years
Customer dividend, negative adjustment percentage	0.22%
Savings commitment liability, annual rate	$ 6,610,000
ERP system benefits savings, liability	$ 3,900,000
Authorized ROE								9.50%
Actual return on equity, dead band percentage, above or below target								3.00%
Actual earnings, above or below dead band								1.50%
Percentage sharing between customers and utilities								0.5
Percentage sharing for any further difference								9
Threshold of capital expenditures in excess of customer contributions for qualification for major project interim recovery				$ 2,500,000
Major project interim recovery requested amount			$ 23,600,000				$ 19,800,000
Percentage cap on cost recovery						90.00%			90.00%		90.00%
Percentage of allowed project costs to flow through MPIR mechanism											100.00%
Target performance historical measurement period								10 years
Service reliability, maximum penalty, percent of return on equity								20.00%
Maximum penalty, pending adjusted amount								$ 6,800,000
Dead band percentage above or below target								3.00%
Call center performance, maximum penalty, percent								8.00%
Call center performance, maximum penalty, pending adjusted amount								$ 1,400,000
Call center performance, maximum penalty amount					900,000	$ 300,000
Performance incentive mechanism, savings calculation, energy price, renewable projects with storage capacity | $ / kWh										0.115
Performance incentive mechanism, savings calculation, energy price, renewable energy-only projects | $ / kWh										0.095
Performance incentive mechanism, savings calculation, incentive cap									$ 3,500,000
Number of contracts which qualified for incentives | contract									7
Public utility, incentives accrued						$ 1,700,000			$ 1,700,000
Number of grid service purchase agreements | entity												2
Number of power purchase agreements (PPAs) (in agreements) | agreement		8						4
Number of power purchase agreements qualifying for potential payout | agreement		1
Interpolated statutory RPS goal rate, years 2021 and 2022 | MWh								20
Interpolated statutory RPS goal rate, year 2023 | MWh								15
Interpolated statutory RPS goal rate, remainder of MRP | MWh								10
Penalty rate for failure to meet RPS targets (megawatt per hour) | MWh								20
Grid Services Procurement PIM, maximum reward					1,500,000			$ 1,500,000
Interconnection Approval PIM, annual maximum reward					3,000,000			3,000,000
Interconnection Approval PIM, annual maximum penalty					900,000			900,000
Low-to-Moderate Income Energy Efficiency PIM, rewards cap					$ 2,000,000			$ 2,000,000
Low-to-Moderate Income Energy Efficiency PIM, duration								3 years
Hawaiian Electric Company, Inc. and Subsidiaries | Schofield Generation Station
Regulatory Projects and Legal Obligations [Line Items]
Major project interim recovery requested amount			19,200,000
Hawaiian Electric Company, Inc. and Subsidiaries | West Loch PV Project
Regulatory Projects and Legal Obligations [Line Items]
Major project interim recovery requested amount			3,800,000
Hawaiian Electric Company, Inc. and Subsidiaries | Grid Modernization Strategy Phase 1 Project
Regulatory Projects and Legal Obligations [Line Items]
Major project interim recovery requested amount			$ 600,000

Electric utility segment - Annu

Electric utility segment - Annual Decoupling Filings (Details) $ in Millions	12 Months Ended
	Dec. 31, 2020USD ($)
Hawaiian Electric Company, Inc. and Subsidiaries
Regulatory Projects and Legal Obligations [Line Items]
2020 Annual incremental RAM adjusted revenues	$ 29.5
Annual change in accrued RBA balance as of December 31, 2019 (and associated revenue taxes) which incorporates MPIR recovery	(67.4)
Incremental Performance Incentive Mechanisms (net)	2
Net annual incremental amount to be refunded under the tariffs	(35.9)
Hawaiian Electric
Regulatory Projects and Legal Obligations [Line Items]
2020 Annual incremental RAM adjusted revenues	20.6
Annual change in accrued RBA balance as of December 31, 2019 (and associated revenue taxes) which incorporates MPIR recovery	(46.5)
Incremental Performance Incentive Mechanisms (net)	2.2
Net annual incremental amount to be refunded under the tariffs	(23.7)
HELCO
Regulatory Projects and Legal Obligations [Line Items]
2020 Annual incremental RAM adjusted revenues	3.2
Annual change in accrued RBA balance as of December 31, 2019 (and associated revenue taxes) which incorporates MPIR recovery	(9.9)
Incremental Performance Incentive Mechanisms (net)	(0.1)
Net annual incremental amount to be refunded under the tariffs	(6.8)
Maui Electric
Regulatory Projects and Legal Obligations [Line Items]
2020 Annual incremental RAM adjusted revenues	5.7
Annual change in accrued RBA balance as of December 31, 2019 (and associated revenue taxes) which incorporates MPIR recovery	(11)
Incremental Performance Incentive Mechanisms (net)	(0.1)
Net annual incremental amount to be refunded under the tariffs	$ (5.4)

Electric utility segment - Most

Electric utility segment - Most Recent Proceedings (Details) - USD ($) $ in Thousands	Oct. 22, 2020	May 13, 2020	Nov. 13, 2019	Dec. 31, 2020	Dec. 31, 2019
Regulatory Projects and Legal Obligations [Line Items]
Regulatory assets				$ 766,708	$ 715,080
Hawaiian Electric
Regulatory Projects and Legal Obligations [Line Items]
Timeframe to acquire annual savings		3 years
Proposed annual savings		$ 25,000
Proposed annual savings, capital, percentage		80.00%
Proposed annual savings, operations and maintenance, percentage		20.00%
Common equity capitalization rate	58.00%
Stipulated ROACE rate	9.50%
Effective interest rate of return	7.37%
HELCO
Regulatory Projects and Legal Obligations [Line Items]
Common equity capitalization rate			58.00%
Stipulated ROACE rate			9.50%
Effective interest rate of return			7.52%
Interim revenue requirement			$ 387,000
Rate base			$ 534,000
Amortization period for state investment tax credit			10 years
Risk sharing percentage, ratepayer			98.00%
Maximum exposure cap			$ 600
Hawaiian Electric Company, Inc. and Subsidiaries
Regulatory Projects and Legal Obligations [Line Items]
Regulatory assets				766,708	$ 715,080
Hawaiian Electric Company, Inc. and Subsidiaries | COVID-19 Related PUC Order
Regulatory Projects and Legal Obligations [Line Items]
Regulatory assets				$ 18,000

Electric utility segment - Cons

Electric utility segment - Consolidating Statement of Income (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Condensed Income Statements, Captions [Line Items]
Revenues	$ 652,217	$ 641,427	$ 608,945	$ 677,186	$ 725,966	$ 770,882	$ 715,485	$ 661,615	$ 2,579,775	$ 2,873,948	$ 2,860,849
Expenses
Total expenses									2,268,282	2,525,927	2,527,493
Operating income	80,674	99,561	71,556	59,702	100,795	96,655	72,634	77,937	311,493	348,021	333,356
Allowance for equity funds used during construction									8,768	11,987	10,877
Retirement defined benefits expense—other than service costs									(3,210)	(2,806)	(5,962)
Allowance for borrowed funds used during construction									2,992	4,453	4,867
Income before income taxes									240,624	271,409	254,461
Income taxes									40,910	51,637	50,797
Net income (loss)	50,958	65,503	49,360	33,893	66,736	63,890	42,985	46,161	199,714	219,772	203,664
Preferred stock dividends of subsidiaries									1,890	1,890	1,890
Net income for common stock	50,485	65,032	48,887	33,420	66,263	63,419	42,512	45,688	197,824	217,882	201,774
Hawaiian Electric (parent only)
Expenses
Total expenses									21,870	20,335	20,621
Retirement defined benefits expense—other than service costs									(634)	(442)	(674)
Income before income taxes									186,565	208,075	193,442
Income taxes									(11,259)	(9,807)	(8,332)
Net income (loss)									197,824	217,882	201,774
Hawaiian Electric Company, Inc. and Subsidiaries
Condensed Income Statements, Captions [Line Items]
Revenues	571,095	562,568	534,215	597,442	645,333	688,330	633,784	578,495	2,265,320	2,545,942	2,546,525
Expenses
Fuel oil									515,274	720,709	760,528
Purchased power									568,749	633,256	639,307
Other operation and maintenance									474,192	481,737	461,491
Depreciation									222,733	215,731	203,626
Taxes, other than income taxes									215,822	240,131	239,912
Total expenses									1,996,770	2,291,564	2,304,864
Operating income	68,273	88,518	67,801	43,958	70,331	71,793	55,694	56,560	268,550	254,378	241,661
Allowance for equity funds used during construction									8,768	11,987	10,877
Equity in earnings of subsidiaries									0	0	0
Retirement defined benefits expense—other than service costs									(763)	(2,836)	(3,631)
Interest expense and other charges, net									(67,794)	(70,842)	(73,348)
Allowance for borrowed funds used during construction									2,992	4,453	4,867
Income before income taxes									211,753	197,140	180,426
Income taxes									40,418	38,305	34,778
Net income (loss)	43,540	60,563	42,828	24,404	45,860	47,277	33,073	32,625	171,335	158,835	145,648
Preferred stock dividends of subsidiaries									915	915	915
Net income attributable to Hawaiian Electric									170,420	157,920	144,733
Preferred stock dividends of Hawaiian Electric									1,080	1,080	1,080
Net income for common stock	$ 43,041	$ 60,065	$ 42,329	$ 23,905	$ 45,361	$ 46,779	$ 32,574	$ 32,126	169,340	156,840	143,653
Hawaiian Electric Company, Inc. and Subsidiaries | Reportable Legal Entities | Hawaiian Electric (parent only)
Condensed Income Statements, Captions [Line Items]
Revenues									1,608,305	1,803,698	1,802,550
Expenses
Fuel oil									354,087	494,728	523,706
Purchased power									446,672	494,215	494,450
Other operation and maintenance									311,781	319,771	313,346
Depreciation									151,387	143,470	137,410
Taxes, other than income taxes									154,191	170,979	170,363
Total expenses									1,418,118	1,623,163	1,639,275
Operating income									190,187	180,535	163,275
Allowance for equity funds used during construction									7,335	9,955	9,208
Equity in earnings of subsidiaries									47,504	43,167	45,393
Retirement defined benefits expense—other than service costs									(1,294)	(2,287)	(2,649)
Interest expense and other charges, net									(48,775)	(51,199)	(52,180)
Allowance for borrowed funds used during construction									2,540	3,666	4,019
Income before income taxes									197,497	183,837	167,066
Income taxes									27,077	25,917	22,333
Net income (loss)									170,420	157,920	144,733
Preferred stock dividends of subsidiaries									0	0	0
Net income attributable to Hawaiian Electric									170,420	157,920	144,733
Preferred stock dividends of Hawaiian Electric									1,080	1,080	1,080
Net income for common stock									169,340	156,840	143,653
Hawaiian Electric Company, Inc. and Subsidiaries | Reportable Legal Entities | HELCO
Condensed Income Statements, Captions [Line Items]
Revenues									334,221	364,590	375,493
Expenses
Fuel oil									72,202	84,565	90,792
Purchased power									73,120	90,989	95,838
Other operation and maintenance									73,746	76,091	70,396
Depreciation									39,041	41,812	40,235
Taxes, other than income taxes									31,181	33,787	34,850
Total expenses									289,290	327,244	332,111
Operating income									44,931	37,346	43,382
Allowance for equity funds used during construction									543	816	478
Equity in earnings of subsidiaries									0	0	0
Retirement defined benefits expense—other than service costs									672	(422)	(417)
Interest expense and other charges, net									(10,004)	(10,741)	(11,836)
Allowance for borrowed funds used during construction									160	342	276
Income before income taxes									36,302	27,341	31,883
Income taxes									8,275	5,990	6,868
Net income (loss)									28,027	21,351	25,015
Preferred stock dividends of subsidiaries									534	534	534
Net income attributable to Hawaiian Electric									27,493	20,817	24,481
Preferred stock dividends of Hawaiian Electric									0	0	0
Net income for common stock									27,493	20,817	24,481
Hawaiian Electric Company, Inc. and Subsidiaries | Reportable Legal Entities | Maui Electric
Condensed Income Statements, Captions [Line Items]
Revenues									323,430	378,202	368,700
Expenses
Fuel oil									88,985	141,416	146,030
Purchased power									48,957	48,052	49,019
Other operation and maintenance									88,665	85,875	77,749
Depreciation									32,305	30,449	25,981
Taxes, other than income taxes									30,450	35,365	34,699
Total expenses									289,362	341,157	333,478
Operating income									34,068	37,045	35,222
Allowance for equity funds used during construction									890	1,216	1,191
Equity in earnings of subsidiaries									0	0	0
Retirement defined benefits expense—other than service costs									(141)	(127)	(565)
Interest expense and other charges, net									(9,651)	(9,450)	(9,550)
Allowance for borrowed funds used during construction									292	445	572
Income before income taxes									25,458	29,129	26,870
Income taxes									5,066	6,398	5,577
Net income (loss)									20,392	22,731	21,293
Preferred stock dividends of subsidiaries									381	381	381
Net income attributable to Hawaiian Electric									20,011	22,350	20,912
Preferred stock dividends of Hawaiian Electric									0	0	0
Net income for common stock									20,011	22,350	20,912
Hawaiian Electric Company, Inc. and Subsidiaries | Reportable Legal Entities | Other subsidiaries
Condensed Income Statements, Captions [Line Items]
Revenues									0	0	0
Expenses
Fuel oil									0	0	0
Purchased power									0	0	0
Other operation and maintenance									0	0	0
Depreciation									0	0	0
Taxes, other than income taxes									0	0	0
Total expenses									0	0	0
Operating income									0	0	0
Allowance for equity funds used during construction									0	0	0
Equity in earnings of subsidiaries									0	0	0
Retirement defined benefits expense—other than service costs									0	0	0
Interest expense and other charges, net									0	0	0
Allowance for borrowed funds used during construction									0	0	0
Income before income taxes									0	0	0
Income taxes									0	0	0
Net income (loss)									0	0	0
Preferred stock dividends of subsidiaries									0	0	0
Net income attributable to Hawaiian Electric									0	0	0
Preferred stock dividends of Hawaiian Electric									0	0	0
Net income for common stock									0	0	0
Hawaiian Electric Company, Inc. and Subsidiaries | Consolidating Adjustments
Condensed Income Statements, Captions [Line Items]
Revenues									(636)	(548)	(218)
Expenses
Fuel oil									0	0	0
Purchased power									0	0	0
Other operation and maintenance									0	0	0
Depreciation									0	0	0
Taxes, other than income taxes									0	0	0
Total expenses									0	0	0
Operating income									(636)	(548)	(218)
Allowance for equity funds used during construction									0	0	0
Equity in earnings of subsidiaries									(47,504)	(43,167)	(45,393)
Retirement defined benefits expense—other than service costs									0	0	0
Interest expense and other charges, net									636	548	218
Allowance for borrowed funds used during construction									0	0	0
Income before income taxes									(47,504)	(43,167)	(45,393)
Income taxes									0	0	0
Net income (loss)									(47,504)	(43,167)	(45,393)
Preferred stock dividends of subsidiaries									0	0	0
Net income attributable to Hawaiian Electric									(47,504)	(43,167)	(45,393)
Preferred stock dividends of Hawaiian Electric									0	0	0
Net income for common stock									$ (47,504)	$ (43,167)	$ (45,393)

Electric utility segment - Co_2

Electric utility segment - Consolidating Statement of Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Condensed Statement of Income Captions [Line Items]
Net income for common stock	$ 50,485	$ 65,032	$ 48,887	$ 33,420	$ 66,263	$ 63,419	$ 42,512	$ 45,688	$ 197,824	$ 217,882	$ 201,774
Retirement benefit plans:
Net gains (losses) arising during the period, net of (taxes) benefits									(60,529)	10,914	(28,101)
Adjustment for amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of tax benefits									23,689	10,107	21,015
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of (taxes) benefits									39,860	(16,177)	8,325
Other comprehensive income (loss), net of taxes									18,775	30,571	(8,669)
Comprehensive income									216,599	248,453	193,105
Hawaiian Electric Company, Inc. and Subsidiaries
Condensed Statement of Income Captions [Line Items]
Net income for common stock	$ 43,041	$ 60,065	$ 42,329	$ 23,905	$ 45,361	$ 46,779	$ 32,574	$ 32,126	169,340	156,840	143,653
Retirement benefit plans:
Net gains (losses) arising during the period, net of (taxes) benefits									(63,050)	5,249	(26,019)
Adjustment for amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of tax benefits									21,550	9,550	19,012
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of (taxes) benefits									39,860	(16,177)	8,325
Other comprehensive income (loss), net of taxes									(1,640)	(1,378)	1,318
Comprehensive income									167,700	155,462	144,971
Hawaiian Electric Company, Inc. and Subsidiaries | Reportable Legal Entities | Hawaiian Electric (parent only)
Condensed Statement of Income Captions [Line Items]
Net income for common stock									169,340	156,840	143,653
Retirement benefit plans:
Net gains (losses) arising during the period, net of (taxes) benefits									(63,050)	5,249	(26,019)
Adjustment for amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of tax benefits									21,550	9,550	19,012
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of (taxes) benefits									39,860	(16,177)	8,325
Other comprehensive income (loss), net of taxes									(1,640)	(1,378)	1,318
Comprehensive income									167,700	155,462	144,971
Hawaiian Electric Company, Inc. and Subsidiaries | Reportable Legal Entities | HELCO
Condensed Statement of Income Captions [Line Items]
Net income for common stock									27,493	20,817	24,481
Retirement benefit plans:
Net gains (losses) arising during the period, net of (taxes) benefits									(9,424)	373	(6,090)
Adjustment for amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of tax benefits									3,179	1,455	2,819
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of (taxes) benefits									6,025	(1,840)	3,305
Other comprehensive income (loss), net of taxes									(220)	(12)	34
Comprehensive income									27,273	20,805	24,515
Hawaiian Electric Company, Inc. and Subsidiaries | Reportable Legal Entities | Maui Electric
Condensed Statement of Income Captions [Line Items]
Net income for common stock									20,011	22,350	20,912
Retirement benefit plans:
Net gains (losses) arising during the period, net of (taxes) benefits									(10,897)	(204)	(5,004)
Adjustment for amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of tax benefits									2,763	1,182	2,423
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of (taxes) benefits									8,000	(1,152)	2,788
Other comprehensive income (loss), net of taxes									(134)	(174)	207
Comprehensive income									19,877	22,176	21,119
Hawaiian Electric Company, Inc. and Subsidiaries | Reportable Legal Entities | Other subsidiaries
Condensed Statement of Income Captions [Line Items]
Net income for common stock									0	0	0
Retirement benefit plans:
Net gains (losses) arising during the period, net of (taxes) benefits									0	0	0
Adjustment for amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of tax benefits									0	0	0
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of (taxes) benefits									0	0	0
Other comprehensive income (loss), net of taxes									0	0	0
Comprehensive income									0	0	0
Hawaiian Electric Company, Inc. and Subsidiaries | Consolidating Adjustments
Condensed Statement of Income Captions [Line Items]
Net income for common stock									(47,504)	(43,167)	(45,393)
Retirement benefit plans:
Net gains (losses) arising during the period, net of (taxes) benefits									20,321	(169)	11,094
Adjustment for amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of tax benefits									(5,942)	(2,637)	(5,242)
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of (taxes) benefits									(14,025)	2,992	(6,093)
Other comprehensive income (loss), net of taxes									354	186	(241)
Comprehensive income									$ (47,150)	$ (42,981)	$ (45,634)

Electric utility segment - Co_3

Electric utility segment - Consolidating Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Jan. 01, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Utility property, plant and equipment
Total property, plant and equipment, net	$ 5,265,735		$ 5,109,628
Current assets
Cash and cash equivalents	341,421		196,813	$ 169,208
Other long-term assets
Operating lease right-of-use-assets	153,069		199,171
Total assets	15,004,007	$ 13,745,251	13,745,251	13,104,051
Capitalization
Common stock equity	2,337,502	2,280,260	2,280,260	2,162,280	$ 2,097,386
Cumulative preferred stock–not subject to mandatory redemption	0		0
Current liabilities
Current portion of operating lease liabilities	64,730		63,707
Interest and dividends payable	23,547		24,941
Deferred credits and other liabilities
Deferred income taxes	395,089	379,324	379,324
Total capitalization and liabilities	15,004,007	$ 13,745,251	13,745,251
Hawaiian Electric (parent only)
Utility property, plant and equipment
Total property, plant and equipment, net	2,456		2,931
Other long-term assets
Total assets	2,930,236		2,821,587
Capitalization
Common stock equity	2,337,502		2,280,260
Cumulative preferred stock–not subject to mandatory redemption	0		0
Current liabilities
Short-term borrowings from non-affiliate	14,909		0
Deferred credits and other liabilities
Total capitalization and liabilities	2,930,236		2,821,587
Hawaiian Electric Company, Inc. and Subsidiaries
Utility property, plant and equipment
Land	51,611		51,816
Plant and equipment	7,509,343		7,240,288
Less accumulated depreciation	(2,819,079)		(2,690,157)
Construction in progress	188,342		193,074
Utility property, plant and equipment, net	4,930,217		4,795,021
Nonutility property, plant and equipment, less accumulated depreciation	6,953		6,956
Total property, plant and equipment, net	4,937,170		4,801,977
Investment in wholly-owned subsidiaries, at equity	0		0
Current assets
Cash and cash equivalents	47,360		11,022	35,877
Restricted cash	15,966		30,872
Advances to affiliates	0		0
Customer accounts receivable, net	147,832		152,790
Accrued unbilled revenues, net	101,036		117,227
Other accounts receivable, net	7,673		11,568
Fuel oil stock, at average cost	58,238		91,937
Materials and supplies, at average cost	67,344		60,702
Prepayments and other	44,083		116,980
Regulatory assets	30,435		30,710
Total current assets	519,967		623,808
Other long-term assets
Operating lease right-of-use-assets	127,654		176,809
Regulatory assets	736,273		684,370
Other	136,309		101,718
Total other long-term assets	1,000,236		962,897
Total assets	6,457,373		6,388,682
Capitalization
Common stock equity	2,141,918		2,047,352	1,957,641	1,845,283
Cumulative preferred stock–not subject to mandatory redemption	34,293		34,293
Long-term debt, net	1,561,302		1,401,714
Total capitalization	3,737,513		3,483,359
Current liabilities
Current portion of operating lease liabilities	64,730		63,707
Current portion of long-term debt, net	0		95,953
Short-term borrowings from non-affiliate	49,979		88,987
Short-term borrowings-affiliate	0		0
Accounts payable	133,849		187,770
Interest and dividends payable	20,350		20,728
Taxes accrued, including revenue taxes	192,524		207,992
Regulatory liabilities	37,301		30,724
Other	74,262		67,305
Total current liabilities	572,995		763,166
Deferred credits and other liabilities
Operating lease liabilities	69,494		113,400
Deferred income taxes	397,798		377,150
Regulatory liabilities	922,485		941,586
Unamortized tax credits	111,915		117,868
Defined benefit pension and other postretirement benefit plans liability	530,532		478,763
Other	114,641		113,390
Total deferred credits and other liabilities	2,146,865		2,142,157
Total capitalization and liabilities	6,457,373		6,388,682
Hawaiian Electric Company, Inc. and Subsidiaries | Reportable Legal Entities | Hawaiian Electric (parent only)
Utility property, plant and equipment
Land	42,411		42,598
Plant and equipment	4,960,470		4,765,362
Less accumulated depreciation	(1,677,256)		(1,591,241)
Construction in progress	143,616		165,137
Utility property, plant and equipment, net	3,469,241		3,381,856
Nonutility property, plant and equipment, less accumulated depreciation	5,306		5,310
Total property, plant and equipment, net	3,474,547		3,387,166
Investment in wholly-owned subsidiaries, at equity	626,890		591,969
Current assets
Cash and cash equivalents	42,205		2,239
Restricted cash	15,966		30,749
Advances to affiliates	26,700		27,700
Customer accounts receivable, net	102,736		105,454
Accrued unbilled revenues, net	73,628		83,148
Other accounts receivable, net	17,984		18,396
Fuel oil stock, at average cost	38,777		69,003
Materials and supplies, at average cost	38,786		34,876
Prepayments and other	34,306		88,334
Regulatory assets	22,095		27,689
Total current assets	413,183		487,588
Other long-term assets
Operating lease right-of-use-assets	125,858		174,886
Regulatory assets	513,192		476,390
Other	98,307		69,010
Total other long-term assets	737,357		720,286
Total assets	5,251,977		5,187,009
Capitalization
Common stock equity	2,141,918		2,047,352	1,957,641	1,845,283
Cumulative preferred stock–not subject to mandatory redemption	22,293		22,293
Long-term debt, net	1,116,426		1,006,737
Total capitalization	3,280,637		3,076,382
Current liabilities
Current portion of operating lease liabilities	64,599		63,582
Current portion of long-term debt, net			61,958
Short-term borrowings from non-affiliate	49,979		88,987
Short-term borrowings-affiliate	0		8,000
Accounts payable	97,102		139,056
Interest and dividends payable	14,480		14,759
Taxes accrued, including revenue taxes	135,018		143,522
Regulatory liabilities	20,224		13,363
Other	57,926		51,295
Total current liabilities	439,328		584,522
Deferred credits and other liabilities
Operating lease liabilities	67,824		111,598
Deferred income taxes	282,685		265,864
Regulatory liabilities	656,270		664,894
Unamortized tax credits	82,563		86,852
Defined benefit pension and other postretirement benefit plans liability	373,112		339,471
Other	69,558		57,426
Total deferred credits and other liabilities	1,532,012		1,526,105
Total capitalization and liabilities	5,251,977		5,187,009
Hawaiian Electric Company, Inc. and Subsidiaries | Reportable Legal Entities | HELCO
Utility property, plant and equipment
Land	5,606		5,606
Plant and equipment	1,352,885		1,313,727
Less accumulated depreciation	(597,606)		(574,615)
Construction in progress	13,043		9,993
Utility property, plant and equipment, net	773,928		754,711
Nonutility property, plant and equipment, less accumulated depreciation	115		114
Total property, plant and equipment, net	774,043		754,825
Investment in wholly-owned subsidiaries, at equity	0		0
Current assets
Cash and cash equivalents	3,046		6,885
Restricted cash	0		123
Advances to affiliates	0		8,000
Customer accounts receivable, net	23,989		24,520
Accrued unbilled revenues, net	13,631		17,071
Other accounts receivable, net	3,028		1,907
Fuel oil stock, at average cost	8,471		8,901
Materials and supplies, at average cost	9,896		8,313
Prepayments and other	5,197		3,725
Regulatory assets	1,954		1,641
Total current assets	69,212		81,086
Other long-term assets
Operating lease right-of-use-assets	1,443		1,537
Regulatory assets	114,461		109,163
Other	17,992		15,493
Total other long-term assets	133,896		126,193
Total assets	977,151		962,104
Capitalization
Common stock equity	317,451		298,998	295,874	286,647
Cumulative preferred stock–not subject to mandatory redemption	7,000		7,000
Long-term debt, net	216,447		206,416
Total capitalization	540,898		512,414
Current liabilities
Current portion of operating lease liabilities	98		94
Current portion of long-term debt, net			13,995
Short-term borrowings from non-affiliate	0		0
Short-term borrowings-affiliate	18,800		0
Accounts payable	19,570		25,629
Interest and dividends payable	3,138		3,115
Taxes accrued, including revenue taxes	29,869		32,541
Regulatory liabilities	8,785		9,454
Other	13,851		11,362
Total current liabilities	94,111		96,190
Deferred credits and other liabilities
Operating lease liabilities	1,344		1,442
Deferred income taxes	54,108		53,534
Regulatory liabilities	173,938		178,474
Unamortized tax credits	15,363		16,196
Defined benefit pension and other postretirement benefit plans liability	77,679		69,928
Other	19,710		33,926
Total deferred credits and other liabilities	342,142		353,500
Total capitalization and liabilities	977,151		962,104
Hawaiian Electric Company, Inc. and Subsidiaries | Reportable Legal Entities | Maui Electric
Utility property, plant and equipment
Land	3,594		3,612
Plant and equipment	1,195,988		1,161,199
Less accumulated depreciation	(544,217)		(524,301)
Construction in progress	31,683		17,944
Utility property, plant and equipment, net	687,048		658,454
Nonutility property, plant and equipment, less accumulated depreciation	1,532		1,532
Total property, plant and equipment, net	688,580		659,986
Investment in wholly-owned subsidiaries, at equity	0		0
Current assets
Cash and cash equivalents	2,032		1,797
Restricted cash	0		0
Advances to affiliates	0		0
Customer accounts receivable, net	21,107		22,816
Accrued unbilled revenues, net	13,777		17,008
Other accounts receivable, net	2,856		1,960
Fuel oil stock, at average cost	10,990		14,033
Materials and supplies, at average cost	18,662		17,513
Prepayments and other	4,580		24,921
Regulatory assets	6,386		1,380
Total current assets	80,390		101,428
Other long-term assets
Operating lease right-of-use-assets	353		386
Regulatory assets	108,620		98,817
Other	20,010		17,215
Total other long-term assets	128,983		116,418
Total assets	897,953		877,832
Capitalization
Common stock equity	309,363		292,870	280,863	270,265
Cumulative preferred stock–not subject to mandatory redemption	5,000		5,000
Long-term debt, net	228,429		188,561
Total capitalization	542,792		486,431
Current liabilities
Current portion of operating lease liabilities	33		31
Current portion of long-term debt, net			20,000
Short-term borrowings from non-affiliate	0		0
Short-term borrowings-affiliate	7,900		27,700
Accounts payable	17,177		23,085
Interest and dividends payable	2,790		2,900
Taxes accrued, including revenue taxes	27,637		31,929
Regulatory liabilities	8,292		7,907
Other	18,621		15,297
Total current liabilities	82,450		128,849
Deferred credits and other liabilities
Operating lease liabilities	326		360
Deferred income taxes	61,005		57,752
Regulatory liabilities	92,277		98,218
Unamortized tax credits	13,989		14,820
Defined benefit pension and other postretirement benefit plans liability	79,741		69,364
Other	25,373		22,038
Total deferred credits and other liabilities	272,711		262,552
Total capitalization and liabilities	897,953		877,832
Hawaiian Electric Company, Inc. and Subsidiaries | Reportable Legal Entities | 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	77		101
Restricted cash	0		0
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	77		101
Other long-term assets
Operating lease right-of-use-assets	0		0
Regulatory assets	0		0
Other	0		0
Total other long-term assets	0		0
Total assets	77		101
Capitalization
Common stock equity	77		101	101	101
Cumulative preferred stock–not subject to mandatory redemption	0		0
Long-term debt, net	0		0
Total capitalization	77		101
Current liabilities
Current portion of operating lease liabilities	0		0
Current portion of long-term debt, net			0
Short-term borrowings from non-affiliate	0		0
Short-term borrowings-affiliate	0		0
Accounts payable	0		0
Interest and 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
Operating lease liabilities	0		0
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 capitalization and liabilities	77		101
Hawaiian Electric Company, Inc. and Subsidiaries | 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	(626,890)		(591,969)
Current assets
Cash and cash equivalents	0		0
Restricted cash	0		0
Advances to affiliates	(26,700)		(35,700)
Customer accounts receivable, net	0		0
Accrued unbilled revenues, net	0		0
Other accounts receivable, net	(16,195)		(10,695)
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	(42,895)		(46,395)
Other long-term assets
Operating lease right-of-use-assets	0		0
Regulatory assets	0		0
Other	0		0
Total other long-term assets	0		0
Total assets	(669,785)		(638,364)
Capitalization
Common stock equity	(626,891)		(591,969)	$ (576,838)	$ (557,013)
Cumulative preferred stock–not subject to mandatory redemption	0		0
Long-term debt, net	0		0
Total capitalization	(626,891)		(591,969)
Current liabilities
Current portion of operating lease liabilities	0		0
Current portion of long-term debt, net			0
Short-term borrowings from non-affiliate	0		0
Short-term borrowings-affiliate	(26,700)		(35,700)
Accounts payable	0		0
Interest and dividends payable	(58)		(46)
Taxes accrued, including revenue taxes	0		0
Regulatory liabilities	0		0
Other	(16,136)		(10,649)
Total current liabilities	(42,894)		(46,395)
Deferred credits and other liabilities
Operating lease liabilities	0		0
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 capitalization and liabilities	$ (669,785)		$ (638,364)

Electric utility segment - Co_4

Electric utility segment - Consolidating Statements of Changes in Common Stock Equity (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Increase (decrease) in stockholders' equity
Beginning Balance				$ 2,280,260				$ 2,162,280	$ 2,280,260	$ 2,162,280	$ 2,097,386
Net income for common stock	$ 50,485	$ 65,032	$ 48,887	33,420	$ 66,263	$ 63,419	$ 42,512	45,688	197,824	217,882	201,774
Other comprehensive income (loss), net of taxes (benefits)									18,775	30,571	(8,669)
Common stock dividends									(144,096)	(139,463)	(134,987)
Ending Balance	2,337,502				2,280,260				2,337,502	2,280,260	2,162,280
Hawaiian Electric (parent only)
Increase (decrease) in stockholders' equity
Beginning Balance				2,280,260					2,280,260
Ending Balance	2,337,502				2,280,260				2,337,502	2,280,260
Eliminations And Reconciling Items
Increase (decrease) in stockholders' equity
Dissolution of subsidiary									24
Hawaiian Electric Company, Inc. and Subsidiaries
Increase (decrease) in stockholders' equity
Beginning Balance				2,047,352				1,957,641	2,047,352	1,957,641	1,845,283
Net income for common stock	43,041	$ 60,065	$ 42,329	23,905	45,361	$ 46,779	$ 32,574	32,126	169,340	156,840	143,653
Other comprehensive income (loss), net of taxes (benefits)									(1,640)	(1,378)	1,318
Issuance of common stock, net of expenses									34,000	35,501	70,692
Common stock dividends									(107,134)	(101,252)	(103,305)
Dissolution of subsidiary									0
Ending Balance	2,141,918				2,047,352				2,141,918	2,047,352	1,957,641
Hawaiian Electric Company, Inc. and Subsidiaries | Reportable Legal Entities | Hawaiian Electric (parent only)
Increase (decrease) in stockholders' equity
Beginning Balance				2,047,352				1,957,641	2,047,352	1,957,641	1,845,283
Net income for common stock									169,340	156,840	143,653
Other comprehensive income (loss), net of taxes (benefits)									(1,640)	(1,378)	1,318
Issuance of common stock, net of expenses									34,000	35,501	70,692
Common stock dividends									(107,134)	(101,252)	(103,305)
Ending Balance	2,141,918				2,047,352				2,141,918	2,047,352	1,957,641
Hawaiian Electric Company, Inc. and Subsidiaries | Reportable Legal Entities | HELCO
Increase (decrease) in stockholders' equity
Beginning Balance				298,998				295,874	298,998	295,874	286,647
Net income for common stock									27,493	20,817	24,481
Other comprehensive income (loss), net of taxes (benefits)									(220)	(12)	34
Issuance of common stock, net of expenses									7,500	(1)	1
Common stock dividends									(16,320)	(17,680)	(15,289)
Ending Balance	317,451				298,998				317,451	298,998	295,874
Hawaiian Electric Company, Inc. and Subsidiaries | Reportable Legal Entities | Maui Electric
Increase (decrease) in stockholders' equity
Beginning Balance				292,870				280,863	292,870	280,863	270,265
Net income for common stock									20,011	22,350	20,912
Other comprehensive income (loss), net of taxes (benefits)									(134)	(174)	207
Issuance of common stock, net of expenses									11,000	4,899	1,498
Common stock dividends									(14,384)	(15,068)	(12,019)
Ending Balance	309,363				292,870				309,363	292,870	280,863
Hawaiian Electric Company, Inc. and Subsidiaries | Reportable Legal Entities | Other subsidiaries
Increase (decrease) in stockholders' equity
Beginning Balance				101				101	101	101	101
Net income for common stock									0	0	0
Other comprehensive income (loss), net of taxes (benefits)									0	0	0
Ending Balance	77				101				77	101	101
Hawaiian Electric Company, Inc. and Subsidiaries | Consolidating Adjustments
Increase (decrease) in stockholders' equity
Beginning Balance				$ (591,969)				$ (576,838)	(591,969)	(576,838)	(557,013)
Net income for common stock									(47,504)	(43,167)	(45,393)
Other comprehensive income (loss), net of taxes (benefits)									354	186	(241)
Issuance of common stock, net of expenses									(18,500)	(4,898)	(1,499)
Common stock dividends									30,704	32,748	27,308
Ending Balance	$ (626,891)				$ (591,969)				(626,891)	$ (591,969)	$ (576,838)
Renewable Hawaii and Uluwehiokama Biofuels Company | Reportable Legal Entities
Increase (decrease) in stockholders' equity
Dissolution of subsidiary									$ (24)

Electric utility segment - Co_5

Electric utility segment - Consolidating Statement of Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash flows from operating activities
Net income (loss)	$ 50,958	$ 65,503	$ 49,360	$ 33,893	$ 66,736	$ 63,890	$ 42,985	$ 46,161	$ 199,714	$ 219,772	$ 203,664
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation of property, plant and equipment									238,114	229,858	214,036
Other amortization									52,664	48,255	41,593
Deferred income taxes									(1,706)	(15,085)	(9,368)
Bad debt expense									2,115	2,150	2,205
Allowance for equity funds used during construction									(8,768)	(11,987)	(10,877)
Other									1,366	18,568	(521)
Changes in assets and liabilities
Decrease in fuel oil stock									34,202	(11,493)	7,054
Decrease in regulatory assets									1,007	71,262	9,252
Increase (decrease) in regulatory liabilities									(16,562)	1,953	37,358
Change in prepaid and accrued income taxes, tax credits and revenue taxes									(35,610)	(27,538)	29,429
Increase (decrease) in defined benefit pension and other postretirement benefit plans liability									(2,029)	(4,482)	20,871
Net cash provided by operating activities									429,407	512,470	499,312
Cash flows from investing activities
Capital expenditures									(383,895)	(457,520)	(537,369)
Other, net									3,412	13,291	14,061
Net cash used in investing activities									(1,413,648)	(541,709)	(792,059)
Cash flows from financing activities
Common stock dividends									(144,096)	(139,463)	(134,987)
Proceeds from issuance of long-term debt									415,997	289,349	250,000
Repayment of long-term debt and funds transferred for repayment of long-term debt									(178,969)	(287,285)	(53,887)
Net increase (decrease) in short-term borrowings from non-affiliates and affiliate with original maturities of three months or less									(71,219)	86,718	(18,999)
Net increase (decrease) in other bank borrowings with original maturities of three months or less									(25,440)	5,070	71,556
Proceeds from issuance of short-term debt									165,000	75,000	25,000
Repayment of short-term debt									(150,000)	(50,000)	(50,000)
Other									(3,203)	(1,836)	(1,603)
Net cash used in financing activities									1,115,535	87,716	200,074
Net decrease in cash and equivalents									131,294	58,477	(92,673)
Cash, cash equivalents and restricted cash, January 1				227,685				169,208	227,685	169,208	261,881
Cash, cash equivalents and restricted cash, December 31	358,979				227,685				358,979	227,685	169,208
Less: Restricted cash	(17,558)				(30,872)				(17,558)	(30,872)	0
Cash and cash equivalents	341,421				196,813				341,421	196,813	169,208
Hawaiian Electric (parent only)
Cash flows from operating activities
Net income (loss)									197,824	217,882	201,774
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation of property, plant and equipment									485	570	597
Changes in assets and liabilities
Net cash provided by operating activities									134,363	131,120	135,470
Cash flows from investing activities
Capital expenditures									(20)	(47)	(143)
Other, net									2,435	(1,001)	140
Net cash used in investing activities									(17,530)	(41,170)	(92,569)
Cash flows from financing activities
Common stock dividends									(144,096)	(139,463)	(134,987)
Proceeds from issuance of long-term debt									50,000	0	150,000
Net increase (decrease) in short-term borrowings from non-affiliates and affiliate with original maturities of three months or less									(32,232)	47,731	(14,000)
Proceeds from issuance of short-term debt									65,000	0	0
Repayment of short-term debt									(50,000)	0	(50,000)
Other									(459)	(10)	(848)
Net cash used in financing activities									(117,487)	(92,739)	(50,861)
Net decrease in cash and equivalents									(654)	(2,789)	(7,960)
Cash, cash equivalents and restricted cash, January 1				953				3,742	953	3,742	11,702
Cash, cash equivalents and restricted cash, December 31	299				953				299	953	3,742
Hawaiian Electric Company, Inc. and Subsidiaries
Cash flows from operating activities
Net income (loss)	43,540	$ 60,563	$ 42,828	24,404	45,860	$ 47,277	$ 33,073	32,625	171,335	158,835	145,648
Adjustments to reconcile net income to net cash provided by operating activities
Equity in earnings of subsidiaries									0	(37)	(100)
Common stock dividends received from subsidiaries									0	35	100
Depreciation of property, plant and equipment									222,733	215,731	203,626
Other amortization									33,746	29,631	26,602
Deferred income taxes									3,151	(16,284)	(7,982)
State refundable credit									(9,961)	(8,369)	(6,239)
Bad debt expense									2,115	2,150	2,205
Allowance for equity funds used during construction									(8,768)	(11,987)	(10,877)
Accrued environmental reserve									6,556	406	273
Other									2,610	27,459	4,669
Changes in assets and liabilities
Decrease (increase) in accounts receivable									(7,286)	18,822	(53,086)
Decrease (increase) in accrued unbilled revenues									15,285	4,495	(14,720)
Decrease in fuel oil stock									33,699	(12,002)	6,938
Increase in materials and supplies									(6,642)	(5,498)	(807)
Decrease in regulatory assets									1,007	71,262	9,252
Increase (decrease) in regulatory liabilities									(16,562)	1,953	37,358
Increase (decrease) in accounts payable									(33,129)	(2,051)	24,358
Change in prepaid and accrued income taxes, tax credits and revenue taxes									(37,180)	(28,523)	25,036
Increase (decrease) in defined benefit pension and other postretirement benefit plans liability									(4,306)	(4,448)	18,746
Changes in other assets and liabilities									(31,852)	(17,624)	(17,387)
Net cash provided by operating activities									336,551	423,956	393,613
Cash flows from investing activities
Capital expenditures									(350,864)	(419,898)	(415,264)
Advances from (to) affiliates									0	0	0
Other, net									6,070	11,374	10,082
Net cash used in investing activities									(344,794)	(408,524)	(405,182)
Cash flows from financing activities
Common stock dividends									(107,134)	(101,252)	(103,305)
Preferred stock dividends of Hawaiian Electric and subsidiaries									(1,995)	(1,995)	(1,995)
Proceeds from issuance of common stock									34,000	35,500	70,700
Proceeds from issuance of long-term debt									255,000	280,000	100,000
Repayment of long-term debt and funds transferred for repayment of long-term debt									(109,000)	(283,546)	(50,000)
Net increase (decrease) in short-term borrowings from non-affiliates and affiliate with original maturities of three months or less									(38,987)	38,987	(4,999)
Net increase (decrease) in other bank borrowings with original maturities of three months or less										38,987
Proceeds from issuance of short-term debt									100,000	75,000	25,000
Repayment of short-term debt									(100,000)	(50,000)	0
Other									(2,209)	(2,109)	(472)
Net cash used in financing activities									29,675	(9,415)	34,929
Net decrease in cash and equivalents									21,432	6,017	23,360
Cash, cash equivalents and restricted cash, January 1				41,894				35,877	41,894	35,877	12,517
Cash, cash equivalents and restricted cash, December 31	63,326				41,894				63,326	41,894	35,877
Less: Restricted cash	(15,966)				(30,872)				(15,966)	(30,872)	0
Cash and cash equivalents	47,360				11,022				47,360	11,022	35,877
Hawaiian Electric Company, Inc. and Subsidiaries | Reportable Legal Entities | Hawaiian Electric (parent only)
Cash flows from operating activities
Net income (loss)									170,420	157,920	144,733
Adjustments to reconcile net income to net cash provided by operating activities
Equity in earnings of subsidiaries									(47,504)	(43,204)	(45,493)
Common stock dividends received from subsidiaries									30,704	32,783	27,408
Depreciation of property, plant and equipment									151,387	143,470	137,410
Other amortization									24,511	23,351	20,956
Deferred income taxes									2,130	(13,547)	(9,806)
State refundable credit									(6,668)	(6,245)	(4,941)
Bad debt expense									1,042	1,236	1,388
Allowance for equity funds used during construction									(7,335)	(9,955)	(9,208)
Accrued environmental reserve									6,556	406	273
Other									1,201	27,575	3,908
Changes in assets and liabilities
Decrease (increase) in accounts receivable									(8,093)	24,150	(53,020)
Decrease (increase) in accrued unbilled revenues									8,832	4,902	(10,908)
Decrease in fuel oil stock									30,226	(14,741)	10,710
Increase in materials and supplies									(3,910)	(4,585)	(1,966)
Decrease in regulatory assets									8,526	55,494	12,192
Increase (decrease) in regulatory liabilities									(5,490)	102	26,540
Increase (decrease) in accounts payable									(26,093)	4,687	14,748
Change in prepaid and accrued income taxes, tax credits and revenue taxes									(25,757)	(24,900)	24,438
Increase (decrease) in defined benefit pension and other postretirement benefit plans liability									(3,092)	(3,033)	17,178
Changes in other assets and liabilities									(21,124)	(15,747)	(8,329)
Net cash provided by operating activities									280,469	340,119	298,211
Cash flows from investing activities
Capital expenditures									(229,127)	(311,538)	(305,703)
Advances from (to) affiliates									1,000	(27,700)	0
Other, net									(14,340)	5,241	3,226
Net cash used in investing activities									(242,467)	(333,997)	(302,477)
Cash flows from financing activities
Common stock dividends									(107,134)	(101,252)	(103,305)
Preferred stock dividends of Hawaiian Electric and subsidiaries									(1,080)	(1,080)	(1,080)
Proceeds from issuance of common stock									34,000	35,500	70,700
Proceeds from issuance of long-term debt									205,000	190,000	75,000
Repayment of long-term debt and funds transferred for repayment of long-term debt									(95,000)	(183,546)	(30,000)
Net increase (decrease) in short-term borrowings from non-affiliates and affiliate with original maturities of three months or less									(46,987)		(16,999)
Net increase (decrease) in other bank borrowings with original maturities of three months or less										46,987
Proceeds from issuance of short-term debt									100,000	75,000	25,000
Repayment of short-term debt									(100,000)	(50,000)
Other									(1,618)	(1,475)	(377)
Net cash used in financing activities									(12,819)	10,134	18,939
Net decrease in cash and equivalents									25,183	16,256	14,673
Cash, cash equivalents and restricted cash, January 1				32,988				16,732	32,988	16,732	2,059
Cash, cash equivalents and restricted cash, December 31	58,171				32,988				58,171	32,988	16,732
Less: Restricted cash	(15,966)				(30,749)				(15,966)	(30,749)
Cash and cash equivalents	42,205				2,239				42,205	2,239
Hawaiian Electric Company, Inc. and Subsidiaries | Reportable Legal Entities | HELCO
Cash flows from operating activities
Net income (loss)									28,027	21,351	25,015
Adjustments to reconcile net income to net cash provided by operating activities
Equity in earnings of subsidiaries									0	0	0
Common stock dividends received from subsidiaries									0	0	0
Depreciation of property, plant and equipment									39,041	41,812	40,235
Other amortization									5,090	4,810	5,069
Deferred income taxes									(463)	(2,383)	(341)
State refundable credit									(1,593)	(559)	(547)
Bad debt expense									620	470	600
Allowance for equity funds used during construction									(543)	(816)	(478)
Accrued environmental reserve									0	0	0
Other									1,322	(61)	334
Changes in assets and liabilities
Decrease (increase) in accounts receivable									(3,349)	2,858	(5,457)
Decrease (increase) in accrued unbilled revenues									3,327	(22)	(1,121)
Decrease in fuel oil stock									430	2,126	(2,329)
Increase in materials and supplies									(1,583)	(1,158)	886
Decrease in regulatory assets									(2,908)	9,218	71
Increase (decrease) in regulatory liabilities									(4,489)	(1,558)	5,380
Increase (decrease) in accounts payable									(1,819)	(3,160)	6,104
Change in prepaid and accrued income taxes, tax credits and revenue taxes									(5,483)	(893)	(2,118)
Increase (decrease) in defined benefit pension and other postretirement benefit plans liability									(643)	(762)	(760)
Changes in other assets and liabilities									(8,864)	(6,152)	2,806
Net cash provided by operating activities									46,120	65,121	73,349
Cash flows from investing activities
Capital expenditures									(64,346)	(49,811)	(51,054)
Advances from (to) affiliates									8,000	(8,000)	0
Other, net									1,032	297	1,182
Net cash used in investing activities									(55,314)	(57,514)	(49,872)
Cash flows from financing activities
Common stock dividends									(16,320)	(17,680)	(15,289)
Preferred stock dividends of Hawaiian Electric and subsidiaries									(534)	(534)	(534)
Proceeds from issuance of common stock									7,500	0	0
Proceeds from issuance of long-term debt									10,000	72,500	15,000
Repayment of long-term debt and funds transferred for repayment of long-term debt									(14,000)	(70,000)	(11,000)
Net increase (decrease) in short-term borrowings from non-affiliates and affiliate with original maturities of three months or less									18,800		0
Net increase (decrease) in other bank borrowings with original maturities of three months or less										0
Proceeds from issuance of short-term debt									0	0	0
Repayment of short-term debt									0	0
Other									(214)	(508)	(56)
Net cash used in financing activities									5,232	(16,222)	(11,879)
Net decrease in cash and equivalents									(3,962)	(8,615)	11,598
Cash, cash equivalents and restricted cash, January 1				7,008				15,623	7,008	15,623	4,025
Cash, cash equivalents and restricted cash, December 31	3,046				7,008				3,046	7,008	15,623
Less: Restricted cash	0				(123)				0	(123)
Cash and cash equivalents	3,046				6,885				3,046	6,885
Hawaiian Electric Company, Inc. and Subsidiaries | Reportable Legal Entities | Maui Electric
Cash flows from operating activities
Net income (loss)									20,392	22,731	21,293
Adjustments to reconcile net income to net cash provided by operating activities
Equity in earnings of subsidiaries									0	0	0
Common stock dividends received from subsidiaries									0	0	0
Depreciation of property, plant and equipment									32,305	30,449	25,981
Other amortization									4,145	1,470	577
Deferred income taxes									1,484	(354)	2,165
State refundable credit									(1,700)	(1,565)	(751)
Bad debt expense									453	444	217
Allowance for equity funds used during construction									(890)	(1,216)	(1,191)
Accrued environmental reserve									0	0	0
Other									87	(55)	427
Changes in assets and liabilities
Decrease (increase) in accounts receivable									(1,343)	3,029	(8,829)
Decrease (increase) in accrued unbilled revenues									3,126	(385)	(2,691)
Decrease in fuel oil stock									3,043	613	(1,443)
Increase in materials and supplies									(1,149)	245	273
Decrease in regulatory assets									(4,611)	6,550	(3,011)
Increase (decrease) in regulatory liabilities									(6,583)	3,409	5,438
Increase (decrease) in accounts payable									(5,217)	(3,578)	3,506
Change in prepaid and accrued income taxes, tax credits and revenue taxes									(5,998)	(3,097)	3,047
Increase (decrease) in defined benefit pension and other postretirement benefit plans liability									(571)	(653)	2,328
Changes in other assets and liabilities									3,635	(6,940)	2,356
Net cash provided by operating activities									40,608	51,097	49,692
Cash flows from investing activities
Capital expenditures									(57,391)	(58,549)	(58,507)
Advances from (to) affiliates									0	0	12,000
Other, net									960	1,303	3,843
Net cash used in investing activities									(56,431)	(57,246)	(42,664)
Cash flows from financing activities
Common stock dividends									(14,384)	(15,068)	(12,019)
Preferred stock dividends of Hawaiian Electric and subsidiaries									(381)	(381)	(381)
Proceeds from issuance of common stock									11,000	4,900	1,500
Proceeds from issuance of long-term debt									40,000	17,500	10,000
Repayment of long-term debt and funds transferred for repayment of long-term debt									0	(30,000)	(9,000)
Net increase (decrease) in short-term borrowings from non-affiliates and affiliate with original maturities of three months or less									(19,800)		0
Net increase (decrease) in other bank borrowings with original maturities of three months or less										27,700
Proceeds from issuance of short-term debt									0	0	0
Repayment of short-term debt									0	0
Other									(377)	(126)	(39)
Net cash used in financing activities									16,058	4,525	(9,939)
Net decrease in cash and equivalents									235	(1,624)	(2,911)
Cash, cash equivalents and restricted cash, January 1				1,797				3,421	1,797	3,421	6,332
Cash, cash equivalents and restricted cash, December 31	2,032				1,797				2,032	1,797	3,421
Less: Restricted cash	0				0				0	0
Cash and cash equivalents	2,032				1,797				2,032	1,797
Hawaiian Electric Company, Inc. and Subsidiaries | Reportable Legal Entities | Other subsidiaries
Cash flows from operating activities
Net income (loss)									0	0	0
Adjustments to reconcile net income to net cash provided by operating activities
Equity in earnings of subsidiaries									0	0	0
Common stock dividends received from subsidiaries									0	0	0
Depreciation of property, plant and equipment									0	0	0
Other amortization									0	0	0
Deferred income taxes									0	0	0
State refundable credit									0	0	0
Bad debt expense									0	0	0
Allowance for equity funds used during construction									0	0	0
Accrued environmental reserve									0	0	0
Other									0	0	0
Changes in assets and liabilities
Decrease (increase) in accounts receivable									0	0	0
Decrease (increase) in accrued unbilled revenues									0	0	0
Decrease in fuel oil stock									0	0	0
Increase in materials and supplies									0	0	0
Decrease in regulatory assets									0	0	0
Increase (decrease) in regulatory liabilities											0
Increase (decrease) in accounts payable									0	0	0
Change in prepaid and accrued income taxes, tax credits and revenue taxes									0	0	0
Increase (decrease) in defined benefit pension and other postretirement benefit plans liability									0	0	0
Changes in other assets and liabilities									0	0	0
Net cash provided by operating activities									0	0	0
Cash flows from investing activities
Capital expenditures									0	0	0
Advances from (to) affiliates									0	0	0
Other, net									(24)	0	0
Net cash used in investing activities									(24)	0	0
Cash flows from financing activities
Common stock dividends									0	0	0
Preferred stock dividends of Hawaiian Electric and subsidiaries									0	0	0
Proceeds from issuance of common stock									0	0	0
Proceeds from issuance of long-term debt									0	0	0
Repayment of long-term debt and funds transferred for repayment of long-term debt									0	0	0
Net increase (decrease) in short-term borrowings from non-affiliates and affiliate with original maturities of three months or less									0		0
Net increase (decrease) in other bank borrowings with original maturities of three months or less										0
Proceeds from issuance of short-term debt									0	0	0
Repayment of short-term debt									0	0
Other									0	0	0
Net cash used in financing activities									0	0	0
Net decrease in cash and equivalents									(24)	0	0
Cash, cash equivalents and restricted cash, January 1				101				101	101	101	101
Cash, cash equivalents and restricted cash, December 31	77				101				77	101	101
Less: Restricted cash	0				0				0	0
Cash and cash equivalents	77				101				77	101
Hawaiian Electric Company, Inc. and Subsidiaries | Consolidating Adjustments
Cash flows from operating activities
Net income (loss)									(47,504)	(43,167)	(45,393)
Adjustments to reconcile net income to net cash provided by operating activities
Equity in earnings of subsidiaries									47,504	43,167	45,393
Common stock dividends received from subsidiaries									(30,704)	(32,748)	(27,308)
Depreciation of property, plant and equipment									0	0	0
Other amortization									0	0	0
Deferred income taxes									0	0	0
State refundable credit									0	0	0
Bad debt expense									0	0	0
Allowance for equity funds used during construction									0	0	0
Accrued environmental reserve									0	0	0
Other									0	0	0
Changes in assets and liabilities
Decrease (increase) in accounts receivable									5,499	(11,215)	14,220
Decrease (increase) in accrued unbilled revenues									0	0	0
Decrease in fuel oil stock									0	0	0
Increase in materials and supplies									0	0	0
Decrease in regulatory assets									0	0	0
Increase (decrease) in regulatory liabilities											0
Increase (decrease) in accounts payable									0	0	0
Change in prepaid and accrued income taxes, tax credits and revenue taxes									58	367	(331)
Increase (decrease) in defined benefit pension and other postretirement benefit plans liability									0	0	0
Changes in other assets and liabilities									(5,499)	11,215	(14,220)
Net cash provided by operating activities									(30,646)	(32,381)	(27,639)
Cash flows from investing activities
Capital expenditures									0	0	0
Advances from (to) affiliates									(9,000)	35,700	(12,000)
Other, net									18,442	4,533	1,831
Net cash used in investing activities									9,442	40,233	(10,169)
Cash flows from financing activities
Common stock dividends									30,704	32,748	27,308
Preferred stock dividends of Hawaiian Electric and subsidiaries									0	0	0
Proceeds from issuance of common stock									(18,500)	(4,900)	(1,500)
Proceeds from issuance of long-term debt									0	0	0
Repayment of long-term debt and funds transferred for repayment of long-term debt									0	0	0
Net increase (decrease) in short-term borrowings from non-affiliates and affiliate with original maturities of three months or less									9,000		12,000
Net increase (decrease) in other bank borrowings with original maturities of three months or less										(35,700)
Proceeds from issuance of short-term debt									0	0	0
Repayment of short-term debt									0	0
Other									0	0	0
Net cash used in financing activities									21,204	(7,852)	37,808
Net decrease in cash and equivalents									0	0	0
Cash, cash equivalents and restricted cash, January 1				$ 0				$ 0	0	0	0
Cash, cash equivalents and restricted cash, December 31	0				0				0	0	$ 0
Less: Restricted cash	0				0				0	0
Cash and cash equivalents	$ 0				$ 0				$ 0	$ 0

Bank segment (HEI only) - State

Bank segment (HEI only) - Statements of Income Data (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Interest expense
Interest on deposit liabilities	$ 10,654	$ 16,830	$ 13,991
Total interest expense	99,808	109,339	104,216
Noninterest income
Revenues	2,269,451	2,622,025
Noninterest expense
Income before income taxes	240,624	271,409	254,461
Income taxes	40,910	51,637	50,797
Current period other comprehensive income (loss) and reclassifications, net of taxes	18,775	30,571	(8,669)
Comprehensive income	216,599	248,453	193,105
COVID-19 related costs	5,100
Incremental compensation expense	2,500
Enhanced cleaning and sanitation costs	2,000
American Savings Bank (ASB)
Interest and dividend income
Interest and fees on loans	214,134	233,632	220,463
Interest and dividends on investment securities	30,529	32,922	37,762
Total interest and dividend income	244,663	266,554	258,225
Interest expense
Interest on deposit liabilities	10,654	16,830	13,991
Interest on other borrowings	460	1,610	1,548
Total interest expense	11,114	18,440	15,539
Net interest income	233,549	248,114	242,686
Provision for credit losses	50,811	23,480	14,745
Net interest income after provision for credit losses	182,738	224,634	227,941
Noninterest income
Gain on sale of properties	0	10,762	0
Gain on sale of investment securities, net	9,275	653	0
Total noninterest income	78,123	72,778	56,050
Noninterest expense
Compensation and employee benefits	104,443	103,009	98,387
Occupancy	21,573	21,272	17,073
Data processing	14,769	15,306	14,268
Services	11,121	10,239	10,847
Equipment	9,001	8,760	7,186
Office supplies, printing and postage	4,623	5,512	6,134
Marketing	3,435	4,490	3,567
FDIC insurance	2,342	1,204	2,713
Other expense1	20,283	15,586	17,238
Total noninterest expense	191,590	185,378	177,413
Income before income taxes	69,271	112,034	106,578
Income taxes	11,688	23,061	24,069
Net income attributable to Hawaiian Electric	57,583	88,973	82,509
Current period other comprehensive income (loss) and reclassifications, net of taxes	23,608	29,406	(7,119)
Comprehensive income	81,191	118,379	75,390
American Savings Bank (ASB) | Fees from other financial services
Noninterest income
Revenues	16,447	19,275	18,937
American Savings Bank (ASB) | Fee income on deposit liabilities
Noninterest income
Revenues	16,059	20,877	21,311
American Savings Bank (ASB) | Fee income on other financial products
Noninterest income
Revenues	6,381	6,507	7,052
American Savings Bank (ASB) | Bank-owned life insurance
Noninterest income
Revenues	6,483	7,687	5,057
American Savings Bank (ASB) | Mortgage banking income
Noninterest income
Revenues	23,734	4,943	1,493
American Savings Bank (ASB) | Other income, net
Noninterest income
Revenues	$ (256)	$ 2,074	$ 2,200

Bank segment (HEI only) - Recon

Bank segment (HEI only) - Reconciliation of Income (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Gain on sale of investment securities, net									$ 9,275	$ 653	$ 0
Revenues	$ 652,217	$ 641,427	$ 608,945	$ 677,186	$ 725,966	$ 770,882	$ 715,485	$ 661,615	2,579,775	2,873,948	2,860,849
Total interest expense									99,808	109,339	104,216
Retirement defined benefits expense—other than service costs									3,210	2,806	5,962
Total expenses									2,268,282	2,525,927	2,527,493
Operating income	$ 80,674	$ 99,561	$ 71,556	$ 59,702	$ 100,795	$ 96,655	$ 72,634	$ 77,937	311,493	348,021	333,356
Add back: Retirement defined benefits expense (credit)—other than service costs									3,210	2,806	5,962
Add back: Gain on sale of investment securities, net									9,275	653	0
Income before income taxes									240,624	271,409	254,461
American Savings Bank (ASB)
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Interest and dividend income									244,663	266,554	258,225
Noninterest income									78,123	72,778	56,050
Less: Gain on sale of real estate									0	10,762	0
Gain on sale of investment securities, net									9,275	653	0
Revenues									313,511	327,917	314,275
Total interest expense									11,114	18,440	15,539
Provision for credit losses									50,811	23,480	14,745
Noninterest expense									191,590	185,378	177,413
Retirement defined benefits expense—other than service costs									1,813	(472)	1,657
Gain on sale of properties									0	10,762	0
Total expenses									251,702	217,008	206,040
Operating income									61,809	110,909	108,235
Add back: Retirement defined benefits expense (credit)—other than service costs									1,813	(472)	1,657
Add back: Gain on sale of investment securities, net									9,275	653	0
Income before income taxes									$ 69,271	$ 112,034	$ 106,578

Bank segment (HEI only) - Balan

Bank segment (HEI only) - Balance Sheets Data (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Jan. 01, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Assets
Cash and cash equivalents, December 31	$ 341,421		$ 196,813	$ 169,208
Investment securities
Available-for-sale, at fair value	1,970,417		1,232,826
Held-to-maturity, at amortized cost (fair value of $229,963 and $143,467 at December 31, 2020 and 2019, respectively)	226,947		139,451
Stock in Federal Home Loan Bank, at cost	8,680		8,434
Loans held for investment	5,345,226		5,120,664	4,843,634
Allowance for credit losses	(101,201)		(53,355)	(52,119)	$ (53,637)
Total financing receivables	5,232,642	$ 5,067,821	5,067,821
Loans held for sale, at lower of cost or fair value	28,275		12,286
Other	629,149		649,885
Goodwill	82,190		82,190
Total assets	15,004,007	13,745,251	13,745,251	13,104,051
LIABILITIES AND SHAREHOLDERS’ EQUITY
Other	618,438	583,545	583,545
Total liabilities	12,632,212	11,430,698	11,430,698
Commitments and contingencies
Retained earnings	660,398	622,042	622,042
Net unrealized gains on securities	19,986		2,481
Accumulated other comprehensive income (loss), net of taxes	(1,264)		(20,039)
Total shareholders’ equity	2,337,502	2,280,260	2,280,260	$ 2,162,280	$ 2,097,386
Total capitalization and liabilities	15,004,007	13,745,251	13,745,251
Other assets
Premises and equipment, net	5,265,735		5,109,628
Total other assets	629,149		649,885
Other liabilities
Total other liabilities	618,438	$ 583,545	583,545
Held-to-maturity investment securities	229,963		143,467
American Savings Bank (ASB)
Assets
Cash and due from banks	178,422		129,770
Interest-bearing deposits	114,304		48,628
Cash and cash equivalents, December 31	292,726		178,398
Investment securities
Available-for-sale, at fair value	1,970,417		1,232,826
Held-to-maturity, at amortized cost (fair value of $229,963 and $143,467 at December 31, 2020 and 2019, respectively)	226,947		139,451
Stock in Federal Home Loan Bank, at cost	8,680		8,434
Loans held for investment	5,333,843		5,121,176
Allowance for credit losses	(101,201)		(53,355)
Total financing receivables	5,232,642		5,067,821
Loans held for sale, at lower of cost or fair value	28,275		12,286
Other	554,656		511,611
Goodwill	82,190		82,190
Total assets	8,396,533		7,233,017
LIABILITIES AND SHAREHOLDERS’ EQUITY
Deposit liabilities–noninterest-bearing	2,598,500		1,909,682
Deposit liabilities–interest-bearing	4,788,457		4,362,220
Other borrowings	89,670		115,110
Other	183,731		146,954
Total liabilities	7,660,358		6,533,966
Commitments and contingencies
Common stock	1		1
Additional paid in capital	351,758		349,453
Retained earnings	369,470		358,259
Net unrealized gains on securities	19,986		2,481
Retirement benefit plans	(5,040)		(11,143)
Accumulated other comprehensive income (loss), net of taxes	14,946		(8,662)
Total shareholders’ equity	736,175		699,051
Total capitalization and liabilities	8,396,533		7,233,017
Other assets
Bank-owned life insurance	163,265		157,465
Premises and equipment, net	206,134		204,449
Accrued interest receivable	24,616		19,365
Mortgage servicing rights	10,020		9,101
Low-income housing investments	83,435		66,302
Other	67,186		54,929
Total other assets	554,656		511,611
Other liabilities
Accrued expenses	62,694		45,822
Federal and state income taxes payable	6,582		14,996
Cashier’s checks	38,011		23,647
Advance payments by borrowers	10,207		10,486
Other	66,237		52,003
Total other liabilities	183,731		146,954
Held-to-maturity investment securities	$ 229,963		$ 143,467

Bank segment (HEI only) - Avail

Bank segment (HEI only) - Available For Sale Investment Securities (Details) $ in Thousands	Dec. 31, 2020USD ($)issues	Dec. 31, 2019USD ($)issues
Available-for-sale
Total amortized cost	$ 1,943,114
Available-for-sale investment securities	1,970,417	$ 1,232,826
Debt Securities, Held-to-maturity, Fair Value to Amortized Cost [Abstract]
Debt Securities, Held-to-maturity	226,947	139,451
Held-to-maturity investment securities	229,963	143,467
American Savings Bank (ASB)
Available-for-sale
Total amortized cost	1,943,114	1,229,438
Gross unrealized gains	30,454	8,015
Gross unrealized losses	(3,151)	(4,627)
Available-for-sale investment securities	$ 1,970,417	$ 1,232,826
Number of issues, less than 12 months | issues	22	21
Fair value, less than 12 months	$ 373,924	$ 156,181
Gross unrealized losses, less than 12 months	$ (3,151)	$ (830)
Number of issues, more than 12 months | issues	0	78
Fair value, 12 months or longer	$ 0	$ 345,657
Gross unrealized losses, 12 months or longer	0	(3,797)
Debt Securities, Held-to-maturity, Fair Value to Amortized Cost [Abstract]
Debt Securities, Held-to-maturity	226,947	139,451
Gross unrealized gains	3,846	4,087
Gross unrealized losses	(830)	(71)
Held-to-maturity investment securities	$ 229,963	$ 143,467
Number of issues, less than 12 months | issues	7	1
Fair value, less than 12 months	$ 114,152	$ 12,986
Gross unrealized losses, less than 12 months	$ (830)	$ (71)
Number of issues, more than 12 months | issues	0	0
Fair value, 12 months or longer	$ 0	$ 0
Gross unrealized losses, 12 months or longer	0	0
American Savings Bank (ASB) | U.S. Treasury and federal agency obligations
Available-for-sale
Total amortized cost	60,260	117,255
Gross unrealized gains	2,062	652
Gross unrealized losses	0	(120)
Available-for-sale investment securities	$ 62,322	$ 117,787
Number of issues, less than 12 months | issues	0	2
Fair value, less than 12 months	$ 0	$ 4,110
Gross unrealized losses, less than 12 months	$ 0	$ (11)
Number of issues, more than 12 months | issues	0	3
Fair value, 12 months or longer	$ 0	$ 27,637
Gross unrealized losses, 12 months or longer	0	(109)
American Savings Bank (ASB) | Mortgage-backed securities — issued or guaranteed by U.S. Government agencies or sponsored agencies
Available-for-sale
Total amortized cost	1,825,893	1,024,892
Gross unrealized gains	26,817	6,000
Gross unrealized losses	(3,151)	(4,507)
Available-for-sale investment securities	$ 1,849,559	$ 1,026,385
Number of issues, less than 12 months | issues	22	19
Fair value, less than 12 months	$ 373,924	$ 152,071
Gross unrealized losses, less than 12 months	$ (3,151)	$ (819)
Number of issues, more than 12 months | issues	0	75
Fair value, 12 months or longer	$ 0	$ 318,020
Gross unrealized losses, 12 months or longer	0	(3,688)
Debt Securities, Held-to-maturity, Fair Value to Amortized Cost [Abstract]
Debt Securities, Held-to-maturity	226,947	139,451
Gross unrealized gains	3,846	4,087
Gross unrealized losses	(830)	(71)
Held-to-maturity investment securities	$ 229,963	$ 143,467
Number of issues, less than 12 months | issues	7	1
Fair value, less than 12 months	$ 114,152	$ 12,986
Gross unrealized losses, less than 12 months	$ (830)	$ (71)
Number of issues, more than 12 months | issues	0	0
Fair value, 12 months or longer	$ 0	$ 0
Gross unrealized losses, 12 months or longer	0	0
American Savings Bank (ASB) | Corporate bonds
Available-for-sale
Total amortized cost	29,776	58,694
Gross unrealized gains	1,575	1,363
Gross unrealized losses	0	0
Available-for-sale investment securities	$ 31,351	$ 60,057
Number of issues, less than 12 months | issues	0	0
Fair value, less than 12 months	$ 0	$ 0
Gross unrealized losses, less than 12 months	$ 0	$ 0
Number of issues, more than 12 months | issues	0	0
Fair value, 12 months or longer	$ 0	$ 0
Gross unrealized losses, 12 months or longer	0	0
American Savings Bank (ASB) | Mortgage revenue bonds
Available-for-sale
Total amortized cost	27,185	28,597
Gross unrealized gains	0	0
Gross unrealized losses	0	0
Available-for-sale investment securities	$ 27,185	$ 28,597
Number of issues, less than 12 months | issues	0	0
Fair value, less than 12 months	$ 0	$ 0
Gross unrealized losses, less than 12 months	$ 0	$ 0
Number of issues, more than 12 months | issues	0	0
Fair value, 12 months or longer	$ 0	$ 0
Gross unrealized losses, 12 months or longer	$ 0	$ 0

Bank segment (HEI only) - Inves

Bank segment (HEI only) - Investment Securities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Amortized Cost
Due in one year or less	$ 16,974
Due after one year through five years	41,551
Due after five years through ten years	31,511
Due after ten years	27,185
Amortized cost, available-for-sale securities with a single maturity date	117,221
Mortgage-related securities-FNMA, FHLMC and GNMA - amortized cost	1,825,893
Total amortized cost	1,943,114
Mortgage-related securities-FNMA, FHLMC and GNMA, amortized cost basis	226,947
Debt Securities, Held-to-maturity	226,947	$ 139,451
Fair value
Due in one year or less	17,098
Due after one year through five years	43,285
Due after five years through ten years	33,290
Due after ten years	27,185
Available-for-sale securities with a single maturity date	120,858
Mortgage-related securities-FNMA, FHLMC and GNMA - fair value	1,849,559
Total fair value	1,970,417	1,232,826
Mortgage-related securities - FNMA, FHLMC and GNMA, Fair Value	229,963
Held-to-maturity securities, Fair Value	229,963	143,467
Gains (losses) from sales of available-for-sale investments
Proceeds	169,157	19,810	$ 0
Gross gains	9,275	653	0
Gross losses	0	0	0
Interest income from taxable and non-taxable investment securities
Taxable	29,760	31,848	37,153
Non-taxable	769	1,074	609
Total	30,529	32,922	$ 37,762
Available-for-sale securities pledged at carrying value	445,000	546,000
Available-for-sale securities, pledged at carrying value as collateral for securities sold under agreements to repurchase	92,000	130,000
Stock in federal home loan bank at cost	8,680	8,434
FHLB Des Moines
Interest income from taxable and non-taxable investment securities
Stock in federal home loan bank at cost	$ 8,700	$ 8,400

Bank segment (HEI only) - Loans

Bank segment (HEI only) - Loans Receivable (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Jan. 01, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Loans receivable
Total	$ 5,345,226		$ 5,120,664
Less: Deferred fees and discounts	(11,383)		512
Allowance for credit losses	(101,201)		(53,355)	$ (52,119)	$ (53,637)
Total financing receivables	5,232,642	$ 5,067,821	5,067,821
Real estate loans
Loans receivable
Total	4,239,745		4,192,069
Residential 1-4 family
Loans receivable
Total	2,144,239		2,178,135
Commercial real estate
Loans receivable
Total	983,865		824,830
Home equity line of credit
Loans receivable
Total	963,578		1,092,125
Residential land
Loans receivable
Total	15,617		14,704
Commercial construction
Loans receivable
Total	121,424		70,605
Residential construction
Loans receivable
Total	11,022		11,670
Commercial
Loans receivable
Total	936,748		670,674
Consumer
Loans receivable
Total	$ 168,733		$ 257,921

Bank segment (HEI only) - Loa_2

Bank segment (HEI only) - Loans Receivable, Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Bank Segment Disclosure [Abstract]
Percentage of benchmark loan to appraisal ratio in excess of which mortgage insurance is required	80.00%
Minimum benchmark percentage of loan to non-owner occupied residential property purchase	75.00%
Real estate loans for investors	$ 1,500	$ 1,300	$ 1,200
Loans pledged as collateral to secure advances from the FHLB of Des Moines	3,000	2,900
Loans to directors, executive directors, affiliates and any related interest of such individuals	13.2	24.1
Loan balances, related interests of individuals who are directors	$ 10	$ 18

Bank segment (HEI only) - Allow

Bank segment (HEI only) - Allowance For Loan Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Allowance for credit losses:
Valuation allowance, balance at the beginning of the period	$ 53,355	$ 52,119	$ 53,637
Charge-offs	(26,154)	(28,662)	(20,517)
Recoveries	4,748	6,418	4,254
Net (charge-offs) recoveries	(21,406)	(22,244)	(16,263)
Provision	49,811	23,480	14,745
Valuation allowance, balance at the end of the period	101,201	53,355	52,119
Average loans outstanding	$ 5,340,287	$ 4,986,830	$ 4,759,335
Net charge-offs (recoveries) to average loans	0.40%	0.45%	0.34%
Ending balance: individually evaluated for impairment		$ 2,691	$ 2,222
Ending balance: collectively evaluated for impairment		50,664	49,897
Total	$ 5,345,226	5,120,664	4,843,634
Financing Receivables:
Ending balance: individually evaluated for impairment		40,737	39,697
Ending balance: collectively evaluated for impairment		5,079,927	4,803,937
Commercial
Allowance for credit losses:
Valuation allowance, balance at the beginning of the period	10,245	9,225	10,851
Charge-offs	(5,819)	(6,811)	(2,722)
Recoveries	872	2,351	2,136
Net (charge-offs) recoveries	(4,947)	(4,460)	(586)
Provision	19,242	5,480	(1,040)
Valuation allowance, balance at the end of the period	25,462	10,245	9,225
Average loans outstanding	$ 935,663	$ 620,206	$ 579,133
Net charge-offs (recoveries) to average loans	0.53%	0.72%	0.10%
Ending balance: individually evaluated for impairment		$ 1,015	$ 628
Ending balance: collectively evaluated for impairment		9,230	8,597
Total	$ 936,748	670,674	587,891
Financing Receivables:
Ending balance: individually evaluated for impairment		8,418	5,340
Ending balance: collectively evaluated for impairment		662,256	582,551
Consumer
Allowance for credit losses:
Valuation allowance, balance at the beginning of the period	16,206	16,769	10,987
Charge-offs	(19,900)	(21,677)	(17,296)
Recoveries	3,381	2,967	1,608
Net (charge-offs) recoveries	(16,519)	(18,710)	(15,688)
Provision	7,800	18,147	21,470
Valuation allowance, balance at the end of the period	23,950	16,206	16,769
Average loans outstanding	$ 215,994	$ 270,340	$ 240,414
Net charge-offs (recoveries) to average loans	7.65%	6.92%	6.53%
Ending balance: individually evaluated for impairment		$ 454	$ 4
Ending balance: collectively evaluated for impairment		15,752	16,765
Total	$ 168,733	257,921	266,002
Financing Receivables:
Ending balance: individually evaluated for impairment		507	89
Ending balance: collectively evaluated for impairment		257,414	265,913
Impact of ASU No. 2016-13
Allowance for credit losses:
Valuation allowance, balance at the beginning of the period	19,441
Valuation allowance, balance at the end of the period		19,441
Impact of ASU No. 2016-13 | Commercial
Allowance for credit losses:
Valuation allowance, balance at the beginning of the period	922
Valuation allowance, balance at the end of the period		922
Impact of ASU No. 2016-13 | Consumer
Allowance for credit losses:
Valuation allowance, balance at the beginning of the period	16,463
Valuation allowance, balance at the end of the period		16,463
Residential 1-4 family
Allowance for credit losses:
Total	2,144,239	2,178,135
Residential 1-4 family | Real estate
Allowance for credit losses:
Valuation allowance, balance at the beginning of the period	2,380	1,976	2,902
Charge-offs	(7)	(26)	(128)
Recoveries	394	854	74
Net (charge-offs) recoveries	387	828	(54)
Provision	(317)	(424)	(872)
Valuation allowance, balance at the end of the period	4,600	2,380	1,976
Average loans outstanding	$ 2,148,848	$ 2,164,759	$ 2,105,674
Net charge-offs (recoveries) to average loans	(0.02%)	(0.04%)	0.00%
Ending balance: individually evaluated for impairment		$ 898	$ 876
Ending balance: collectively evaluated for impairment		1,482	1,100
Total		2,178,135	2,143,397
Financing Receivables:
Ending balance: individually evaluated for impairment		15,600	16,494
Ending balance: collectively evaluated for impairment		2,162,535	2,126,903
Residential 1-4 family | Impact of ASU No. 2016-13 | Real estate
Allowance for credit losses:
Valuation allowance, balance at the beginning of the period	$ 2,150
Valuation allowance, balance at the end of the period		2,150
Commercial real estate
Allowance for credit losses:
Total	983,865	824,830
Commercial real estate | Real estate
Allowance for credit losses:
Valuation allowance, balance at the beginning of the period	15,053	14,505	15,796
Charge-offs	0	0	0
Recoveries	0	0	0
Net (charge-offs) recoveries	0	0	0
Provision	20,346	548	(1,291)
Valuation allowance, balance at the end of the period	35,607	15,053	14,505
Average loans outstanding	$ 861,096	$ 781,531	$ 745,186
Net charge-offs (recoveries) to average loans	0.00%	0.00%	0.00%
Ending balance: individually evaluated for impairment		$ 2	$ 7
Ending balance: collectively evaluated for impairment		15,051	14,498
Total		824,830	748,398
Financing Receivables:
Ending balance: individually evaluated for impairment		1,048	915
Ending balance: collectively evaluated for impairment		823,782	747,483
Commercial real estate | Impact of ASU No. 2016-13 | Real estate
Allowance for credit losses:
Valuation allowance, balance at the beginning of the period	$ 208
Valuation allowance, balance at the end of the period		208
Home equity line of credit
Allowance for credit losses:
Total	963,578	1,092,125
Home equity line of credit | Real estate
Allowance for credit losses:
Valuation allowance, balance at the beginning of the period	6,922	6,371	7,522
Charge-offs	(77)	(144)	(353)
Recoveries	63	17	257
Net (charge-offs) recoveries	(14)	(127)	(96)
Provision	446	678	(1,055)
Valuation allowance, balance at the end of the period	6,813	6,922	6,371
Average loans outstanding	$ 1,060,444	$ 1,043,479	$ 944,065
Net charge-offs (recoveries) to average loans	0.00%	0.01%	0.01%
Ending balance: individually evaluated for impairment		$ 322	$ 701
Ending balance: collectively evaluated for impairment		6,600	5,670
Total		1,092,125	978,237
Financing Receivables:
Ending balance: individually evaluated for impairment		12,073	14,800
Ending balance: collectively evaluated for impairment		1,080,052	963,437
Home equity line of credit | Impact of ASU No. 2016-13 | Real estate
Allowance for credit losses:
Valuation allowance, balance at the beginning of the period	$ (541)
Valuation allowance, balance at the end of the period		(541)
Residential land
Allowance for credit losses:
Total	15,617	14,704
Residential land | Real estate
Allowance for credit losses:
Valuation allowance, balance at the beginning of the period	449	479	896
Charge-offs	(351)	(4)	(18)
Recoveries	38	229	179
Net (charge-offs) recoveries	(313)	225	161
Provision	537	(255)	(578)
Valuation allowance, balance at the end of the period	609	449	479
Average loans outstanding	$ 13,799	$ 14,065	$ 14,935
Net charge-offs (recoveries) to average loans	2.27%	(1.60%)	(1.08%)
Ending balance: individually evaluated for impairment		$ 0	$ 6
Ending balance: collectively evaluated for impairment		449	473
Total		14,704	13,138
Financing Receivables:
Ending balance: individually evaluated for impairment		3,091	2,059
Ending balance: collectively evaluated for impairment		11,613	11,079
Residential land | Impact of ASU No. 2016-13 | Real estate
Allowance for credit losses:
Valuation allowance, balance at the beginning of the period	$ (64)
Valuation allowance, balance at the end of the period		(64)
Commercial construction
Allowance for credit losses:
Total	121,424	70,605
Commercial construction | Real estate
Allowance for credit losses:
Valuation allowance, balance at the beginning of the period	2,097	2,790	4,671
Charge-offs	0	0	0
Recoveries	0	0	0
Net (charge-offs) recoveries	0	0	0
Provision	1,763	(693)	(1,881)
Valuation allowance, balance at the end of the period	4,149	2,097	2,790
Average loans outstanding	$ 93,740	$ 81,937	$ 114,969
Net charge-offs (recoveries) to average loans	0.00%	0.00%	0.00%
Ending balance: individually evaluated for impairment		$ 0	$ 0
Ending balance: collectively evaluated for impairment		2,097	2,790
Total		70,605	92,264
Financing Receivables:
Ending balance: individually evaluated for impairment		0	0
Ending balance: collectively evaluated for impairment		70,605	92,264
Commercial construction | Impact of ASU No. 2016-13 | Real estate
Allowance for credit losses:
Valuation allowance, balance at the beginning of the period	$ 289
Valuation allowance, balance at the end of the period		289
Residential construction
Allowance for credit losses:
Total	11,022	11,670
Residential construction | Real estate
Allowance for credit losses:
Valuation allowance, balance at the beginning of the period	3	4	12
Charge-offs	0	0	0
Recoveries	0	0	0
Net (charge-offs) recoveries	0	0	0
Provision	(6)	(1)	(8)
Valuation allowance, balance at the end of the period	11	3	4
Average loans outstanding	$ 10,703	$ 10,513	$ 14,959
Net charge-offs (recoveries) to average loans	0.00%	0.00%	0.00%
Ending balance: individually evaluated for impairment		$ 0	$ 0
Ending balance: collectively evaluated for impairment		3	4
Total		11,670	14,307
Financing Receivables:
Ending balance: individually evaluated for impairment		0	0
Ending balance: collectively evaluated for impairment		11,670	$ 14,307
Residential construction | Impact of ASU No. 2016-13 | Real estate
Allowance for credit losses:
Valuation allowance, balance at the beginning of the period	$ 14
Valuation allowance, balance at the end of the period		14
Commercial
Allowance for credit losses:
Total	936,748	670,674
Consumer
Allowance for credit losses:
Total	$ 168,733	$ 257,921

Bank segment (HEI only) - All_2

Bank segment (HEI only) - Allowance for loan commitments (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020USD ($)
Credit risk profile based on payment activity for loans
Beginning Balance	$ 1,741
Provision	1,000
Ending Balance	4,300
Impact of ASU No. 2016-13
Credit risk profile based on payment activity for loans
Beginning Balance	1,559
Real estate | Home equity  line of credit
Credit risk profile based on payment activity for loans
Beginning Balance	392
Provision	0
Ending Balance	300
Real estate | Home equity  line of credit | Impact of ASU No. 2016-13
Credit risk profile based on payment activity for loans
Beginning Balance	(92)
Real estate | Commercial construction
Credit risk profile based on payment activity for loans
Beginning Balance	931
Provision	324
Ending Balance	3,000
Real estate | Commercial construction | Impact of ASU No. 2016-13
Credit risk profile based on payment activity for loans
Beginning Balance	1,745
Commercial
Credit risk profile based on payment activity for loans
Beginning Balance	418
Provision	676
Ending Balance	1,000
Commercial | Impact of ASU No. 2016-13
Credit risk profile based on payment activity for loans
Beginning Balance	$ (94)

Bank segment (HEI only) - Credi

Bank segment (HEI only) - Credit Risk Profile by Internally Assigned Grade for Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Credit risk profile by internally assigned grade for loans
2020	$ 1,339,586
2019	590,363
2018	382,648
2017	335,784
2016	368,904
Prior	1,172,236
Revolving loans	1,093,287
Converted to term loans	62,418
Total	5,345,226	$ 5,120,664	$ 4,843,634
Consumer
Credit risk profile by internally assigned grade for loans
2020	29,546
2019	69,325
2018	38,635
2017	7,646
2016	307
Prior	348
Revolving loans	18,848
Converted to term loans	4,078
Total	168,733	257,921	266,002
Conversion of debt	2,800
Consumer | Current
Credit risk profile by internally assigned grade for loans
2020	28,818
2019	67,159
2018	37,072
2017	7,207
2016	293
Prior	348
Revolving loans	18,351
Converted to term loans	3,758
Total	163,006
Consumer | 30-59 days past due
Credit risk profile by internally assigned grade for loans
2020	406
2019	1,085
2018	727
2017	155
2016	4
Prior	0
Revolving loans	138
Converted to term loans	90
Total	2,605
Consumer | 60-89 days past due
Credit risk profile by internally assigned grade for loans
2020	191
2019	549
2018	427
2017	165
2016	3
Prior	0
Revolving loans	97
Converted to term loans	59
Total	1,491
Consumer | Greater than 90 days
Credit risk profile by internally assigned grade for loans
2020	131
2019	532
2018	409
2017	119
2016	7
Prior	0
Revolving loans	262
Converted to term loans	171
Total	1,631
Commercial
Credit risk profile by internally assigned grade for loans
2020	430,228
2019	148,663
2018	79,496
2017	40,218
2016	50,326
Prior	52,133
Revolving loans	111,534
Converted to term loans	24,150
Total	936,748	$ 670,674	$ 587,891
Conversion of debt	14,400
Pass | Commercial
Credit risk profile by internally assigned grade for loans
2020	392,088
2019	117,791
2018	75,533
2017	29,211
2016	12,520
Prior	35,770
Revolving loans	74,520
Converted to term loans	11,004
Total	748,437
Special Mention | Commercial
Credit risk profile by internally assigned grade for loans
2020	37,836
2019	23,087
2018	1,920
2017	6,990
2016	30,264
Prior	13,250
Revolving loans	31,362
Converted to term loans	11,218
Total	155,927
Substandard | Commercial
Credit risk profile by internally assigned grade for loans
2020	304
2019	7,785
2018	2,043
2017	4,017
2016	7,542
Prior	3,113
Revolving loans	5,265
Converted to term loans	1,928
Total	31,997
Doubtful | Commercial
Credit risk profile by internally assigned grade for loans
2020	0
2019	0
2018	0
2017	0
2016	0
Prior	0
Revolving loans	387
Converted to term loans	0
Total	387
Residential 1-4 family | Real estate
Credit risk profile by internally assigned grade for loans
2020	567,282
2019	219,464
2018	111,243
2017	204,269
2016	184,888
Prior	857,093
Revolving loans	0
Converted to term loans	0
Total	2,144,239
Residential 1-4 family | Real estate | Current
Credit risk profile by internally assigned grade for loans
2020	567,282
2019	218,988
2018	111,243
2017	203,916
2016	184,888
Prior	849,788
Revolving loans	0
Converted to term loans	0
Total	2,136,105
Residential 1-4 family | Real estate | 30-59 days past due
Credit risk profile by internally assigned grade for loans
2020	0
2019	0
2018	0
2017	0
2016	0
Prior	2,629
Revolving loans	0
Converted to term loans	0
Total	2,629
Residential 1-4 family | Real estate | 60-89 days past due
Credit risk profile by internally assigned grade for loans
2020	0
2019	476
2018	0
2017	0
2016	0
Prior	2,314
Revolving loans	0
Converted to term loans	0
Total	2,790
Residential 1-4 family | Real estate | Greater than 90 days
Credit risk profile by internally assigned grade for loans
2020	0
2019	0
2018	0
2017	353
2016	0
Prior	2,362
Revolving loans	0
Converted to term loans	0
Total	2,715
Home equity  line of credit
Credit risk profile by internally assigned grade for loans
Conversion of debt	11,300
Home equity  line of credit | Real estate
Credit risk profile by internally assigned grade for loans
2020	0
2019	0
2018	0
2017	0
2016	0
Prior	0
Revolving loans	929,388
Converted to term loans	34,190
Total	963,578
Home equity  line of credit | Real estate | Current
Credit risk profile by internally assigned grade for loans
2020	0
2019	0
2018	0
2017	0
2016	0
Prior	0
Revolving loans	927,106
Converted to term loans	33,228
Total	960,334
Home equity  line of credit | Real estate | 30-59 days past due
Credit risk profile by internally assigned grade for loans
2020	0
2019	0
2018	0
2017	0
2016	0
Prior	0
Revolving loans	552
Converted to term loans	298
Total	850
Home equity  line of credit | Real estate | 60-89 days past due
Credit risk profile by internally assigned grade for loans
2020	0
2019	0
2018	0
2017	0
2016	0
Prior	0
Revolving loans	267
Converted to term loans	75
Total	342
Home equity  line of credit | Real estate | Greater than 90 days
Credit risk profile by internally assigned grade for loans
2020	0
2019	0
2018	0
2017	0
2016	0
Prior	0
Revolving loans	1,463
Converted to term loans	589
Total	2,052
Residential land | Real estate
Credit risk profile by internally assigned grade for loans
2020	8,357
2019	3,427
2018	1,598
2017	939
2016	22
Prior	1,274
Revolving loans	0
Converted to term loans	0
Total	15,617
Residential land | Real estate | Current
Credit risk profile by internally assigned grade for loans
2020	8,357
2019	3,427
2018	1,598
2017	939
2016	22
Prior	272
Revolving loans	0
Converted to term loans	0
Total	14,615
Residential land | Real estate | 30-59 days past due
Credit risk profile by internally assigned grade for loans
2020	0
2019	0
2018	0
2017	0
2016	0
Prior	702
Revolving loans	0
Converted to term loans	0
Total	702
Residential land | Real estate | 60-89 days past due
Credit risk profile by internally assigned grade for loans
2020	0
2019	0
2018	0
2017	0
2016	0
Prior	0
Revolving loans	0
Converted to term loans	0
Total	0
Residential land | Real estate | Greater than 90 days
Credit risk profile by internally assigned grade for loans
2020	0
2019	0
2018	0
2017	0
2016	0
Prior	300
Revolving loans	0
Converted to term loans	0
Total	300
Residential construction | Real estate
Credit risk profile by internally assigned grade for loans
2020	6,919
2019	3,093
2018	385
2017	625
2016	0
Prior	0
Revolving loans	0
Converted to term loans	0
Total	11,022
Residential construction | Real estate | Current
Credit risk profile by internally assigned grade for loans
2020	6,919
2019	3,093
2018	385
2017	625
2016	0
Prior	0
Revolving loans	0
Converted to term loans	0
Total	11,022
Residential construction | Real estate | 30-59 days past due
Credit risk profile by internally assigned grade for loans
2020	0
2019	0
2018	0
2017	0
2016	0
Prior	0
Revolving loans	0
Converted to term loans	0
Total	0
Residential construction | Real estate | 60-89 days past due
Credit risk profile by internally assigned grade for loans
2020	0
2019	0
2018	0
2017	0
2016	0
Prior	0
Revolving loans	0
Converted to term loans	0
Total	0
Residential construction | Real estate | Greater than 90 days
Credit risk profile by internally assigned grade for loans
2020	0
2019	0
2018	0
2017	0
2016	0
Prior	0
Revolving loans	0
Converted to term loans	0
Total	0
Commercial real estate | Real estate
Credit risk profile by internally assigned grade for loans
2020	280,864
2019	114,426
2018	124,301
2017	64,087
2016	127,799
Prior	261,388
Revolving loans	11,000
Converted to term loans	0
Total	983,865
Commercial real estate | Pass | Real estate
Credit risk profile by internally assigned grade for loans
2020	270,603
2019	63,301
2018	62,168
2017	28,432
2016	55,089
Prior	155,654
Revolving loans	11,000
Converted to term loans	0
Total	646,247
Commercial real estate | Special Mention | Real estate
Credit risk profile by internally assigned grade for loans
2020	10,261
2019	36,405
2018	57,952
2017	33,763
2016	68,287
Prior	48,094
Revolving loans	0
Converted to term loans	0
Total	254,762
Commercial real estate | Substandard | Real estate
Credit risk profile by internally assigned grade for loans
2020	0
2019	14,720
2018	4,181
2017	1,892
2016	4,423
Prior	57,640
Revolving loans	0
Converted to term loans	0
Total	82,856
Commercial real estate | Doubtful | Real estate
Credit risk profile by internally assigned grade for loans
2020	0
2019	0
2018	0
2017	0
2016	0
Prior	0
Revolving loans	0
Converted to term loans	0
Total	0
Commercial construction | Real estate
Credit risk profile by internally assigned grade for loans
2020	16,390
2019	31,965
2018	26,990
2017	18,000
2016	5,562
Prior	0
Revolving loans	22,517
Converted to term loans	0
Total	121,424
Commercial construction | Pass | Real estate
Credit risk profile by internally assigned grade for loans
2020	14,480
2019	31,965
2018	26,990
2017	0
2016	5,562
Prior	0
Revolving loans	22,517
Converted to term loans	0
Total	101,514
Commercial construction | Special Mention | Real estate
Credit risk profile by internally assigned grade for loans
2020	1,910
2019	0
2018	0
2017	18,000
2016	0
Prior	0
Revolving loans	0
Converted to term loans	0
Total	19,910
Commercial construction | Substandard | Real estate
Credit risk profile by internally assigned grade for loans
2020	0
2019	0
2018	0
2017	0
2016	0
Prior	0
Revolving loans	0
Converted to term loans	0
Total	0
Commercial construction | Doubtful | Real estate
Credit risk profile by internally assigned grade for loans
2020	0
2019	0
2018	0
2017	0
2016	0
Prior	0
Revolving loans	0
Converted to term loans	0
Total	$ 0

Bank segment (HEI only) - Cre_2

Bank segment (HEI only) - Credit Risk Profile Based on Payment Activity for Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Credit risk profile based on payment activity for loans
Total past due	$ 19,635	$ 19,751
Current	5,325,591	5,100,913
Total	5,345,226	5,120,664	$ 4,843,634
Recorded Investment greater than 90 days and accruing	0	0
Residential 1-4 family
Credit risk profile based on payment activity for loans
Total past due	8,134	4,686
Current	2,136,105	2,173,449
Total	2,144,239	2,178,135
Recorded Investment greater than 90 days and accruing	0	0
Commercial real estate
Credit risk profile based on payment activity for loans
Total past due	488	0
Current	983,377	824,830
Total	983,865	824,830
Recorded Investment greater than 90 days and accruing	0	0
Home equity line of credit
Credit risk profile based on payment activity for loans
Total past due	3,244	2,930
Current	960,334	1,089,195
Total	963,578	1,092,125
Recorded Investment greater than 90 days and accruing	0	0
Residential land
Credit risk profile based on payment activity for loans
Total past due	1,002	25
Current	14,615	14,679
Total	15,617	14,704
Recorded Investment greater than 90 days and accruing	0	0
Commercial construction
Credit risk profile based on payment activity for loans
Total past due	0	0
Current	121,424	70,605
Total	121,424	70,605
Recorded Investment greater than 90 days and accruing	0	0
Residential construction
Credit risk profile based on payment activity for loans
Total past due	0	0
Current	11,022	11,670
Total	11,022	11,670
Recorded Investment greater than 90 days and accruing	0	0
Commercial
Credit risk profile based on payment activity for loans
Total past due	1,040	1,560
Current	935,708	669,114
Total	936,748	670,674
Recorded Investment greater than 90 days and accruing	0	0
Consumer
Credit risk profile based on payment activity for loans
Total past due	5,727	10,550
Current	163,006	247,371
Total	168,733	257,921
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	7,394	8,864
30-59 days past due | Residential 1-4 family
Credit risk profile based on payment activity for loans
Total past due	2,629	2,588
30-59 days past due | Commercial real estate
Credit risk profile based on payment activity for loans
Total past due	0	0
30-59 days past due | Home equity line of credit
Credit risk profile based on payment activity for loans
Total past due	850	813
30-59 days past due | Residential land
Credit risk profile based on payment activity for loans
Total past due	702	0
30-59 days past due | Commercial construction
Credit risk profile based on payment activity for loans
Total past due	0	0
30-59 days past due | Residential construction
Credit risk profile based on payment activity for loans
Total past due	0	0
30-59 days past due | Commercial
Credit risk profile based on payment activity for loans
Total past due	608	1,077
30-59 days past due | Consumer
Credit risk profile based on payment activity for loans
Total past due	2,605	4,386
60-89 days past due
Credit risk profile based on payment activity for loans
Total past due	5,411	3,858
60-89 days past due | Residential 1-4 family
Credit risk profile based on payment activity for loans
Total past due	2,790	290
60-89 days past due | Commercial real estate
Credit risk profile based on payment activity for loans
Total past due	488	0
60-89 days past due | Home equity line of credit
Credit risk profile based on payment activity for loans
Total past due	342	0
60-89 days past due | Residential land
Credit risk profile based on payment activity for loans
Total past due	0	0
60-89 days past due | Commercial construction
Credit risk profile based on payment activity for loans
Total past due	0	0
60-89 days past due | Residential construction
Credit risk profile based on payment activity for loans
Total past due	0	0
60-89 days past due | Commercial
Credit risk profile based on payment activity for loans
Total past due	300	311
60-89 days past due | Consumer
Credit risk profile based on payment activity for loans
Total past due	1,491	3,257
Greater than 90 days
Credit risk profile based on payment activity for loans
Total past due	6,830	7,029
Greater than 90 days | Residential 1-4 family
Credit risk profile based on payment activity for loans
Total past due	2,715	1,808
Greater than 90 days | Commercial real estate
Credit risk profile based on payment activity for loans
Total past due	0	0
Greater than 90 days | Home equity line of credit
Credit risk profile based on payment activity for loans
Total past due	2,052	2,117
Greater than 90 days | Residential land
Credit risk profile based on payment activity for loans
Total past due	300	25
Greater than 90 days | Commercial construction
Credit risk profile based on payment activity for loans
Total past due	0	0
Greater than 90 days | Residential construction
Credit risk profile based on payment activity for loans
Total past due	0	0
Greater than 90 days | Commercial
Credit risk profile based on payment activity for loans
Total past due	132	172
Greater than 90 days | Consumer
Credit risk profile based on payment activity for loans
Total past due	$ 1,631	$ 2,907

Bank segment (HEI only) - Cre_3

Bank segment (HEI only) - Credit Risk Profile - Nonaccrual Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Credit risk profile based on nonaccrual loans
With a Related ACL	$ 36,491
Without a Related ACL	10,905
Total	47,396	$ 29,736
Total troubled debt restructuring loans not included above	27,078	26,413
Commercial
Credit risk profile based on nonaccrual loans
With a Related ACL	1,819
Without a Related ACL	3,328
Total	5,147	5,947
Total troubled debt restructuring loans not included above	6,108	2,614
Consumer
Credit risk profile based on nonaccrual loans
With a Related ACL	3,935
Without a Related ACL	0
Total	3,935	5,113
Total troubled debt restructuring loans not included above	54	57
Residential 1-4 family | Real estate
Credit risk profile based on nonaccrual loans
With a Related ACL	8,991
Without a Related ACL	2,835
Total	11,826	11,395
Total troubled debt restructuring loans not included above	7,932	9,869
Commercial real estate | Real estate
Credit risk profile based on nonaccrual loans
With a Related ACL	15,847
Without a Related ACL	2,875
Total	18,722	195
Total troubled debt restructuring loans not included above	3,281	853
Home equity  line of credit | Real estate
Credit risk profile based on nonaccrual loans
With a Related ACL	5,791
Without a Related ACL	1,567
Total	7,358	6,638
Total troubled debt restructuring loans not included above	8,148	10,376
Residential land | Real estate
Credit risk profile based on nonaccrual loans
With a Related ACL	108
Without a Related ACL	300
Total	408	448
Total troubled debt restructuring loans not included above	1,555	2,644
Commercial construction | Real estate
Credit risk profile based on nonaccrual loans
With a Related ACL	0
Without a Related ACL	0
Total	0	0
Total troubled debt restructuring loans not included above	0	0
Residential construction | Real estate
Credit risk profile based on nonaccrual loans
With a Related ACL	0
Without a Related ACL	0
Total	0	0
Total troubled debt restructuring loans not included above	$ 0	$ 0

Bank segment (HEI only) - TDR N

Bank segment (HEI only) - TDR Narrative (Details)	12 Months Ended
	Dec. 31, 2020
Residential land
Troubled debt restructurings
Period of interest-only monthly payment term loan	3 years

Bank segment (HEI only) - Loan

Bank segment (HEI only) - Loan Modifications (Details)	12 Months Ended
	Dec. 31, 2020USD ($)contract	Dec. 31, 2019USD ($)contract	Dec. 31, 2018USD ($)contract
Loan modifications determined to be troubled debt restructurings
Number of contracts | contract	68	25	70
Pre-modification outstanding recorded investment	$ 26,991,000	$ 8,821,000	$ 10,728,000
Post-modification outstanding recorded investment	$ 5,379,000	$ 680,000	$ 815,000
Troubled debt restructuring that subsequently defaulted, number of contracts | contract	0	0	2
Troubled debt restructuring that subsequently defaulted, recorded investment	$ 0	$ 0	$ 327,000
Commitments to borrowers whose loan terms are impaired or modified under troubled debt restructuring	0	0
Consumer mortgage loans collateralized by residential real estate property in foreclosure process	$ 3,800,000	$ 3,500,000
Residential 1-4 family
Loan modifications determined to be troubled debt restructurings
Number of contracts | contract	1	11	3
Pre-modification outstanding recorded investment	$ 144,000	$ 1,770,000	$ 566,000
Post-modification outstanding recorded investment	$ 6,000	$ 190,000	$ 26,000
Troubled debt restructuring that subsequently defaulted, number of contracts | contract	0	0	0
Troubled debt restructuring that subsequently defaulted, recorded investment	$ 0	$ 0	$ 0
Commercial real estate
Loan modifications determined to be troubled debt restructurings
Number of contracts | contract	6	0	0
Pre-modification outstanding recorded investment	$ 20,714,000	$ 0	$ 0
Post-modification outstanding recorded investment	$ 4,439,000	$ 0	$ 0
Troubled debt restructuring that subsequently defaulted, number of contracts | contract	0	0	0
Troubled debt restructuring that subsequently defaulted, recorded investment	$ 0	$ 0	$ 0
Home equity line of credit
Loan modifications determined to be troubled debt restructurings
Number of contracts | contract	3	3	53
Pre-modification outstanding recorded investment	$ 85,000	$ 442,000	$ 6,659,000
Post-modification outstanding recorded investment	$ 11,000	$ 73,000	$ 578,000
Troubled debt restructuring that subsequently defaulted, number of contracts | contract	0	0	1
Troubled debt restructuring that subsequently defaulted, recorded investment	$ 0	$ 0	$ 81,000
Residential land
Loan modifications determined to be troubled debt restructurings
Number of contracts | contract	4	3	2
Pre-modification outstanding recorded investment	$ 668,000	$ 1,086,000	$ 1,338,000
Post-modification outstanding recorded investment	$ 54,000	$ 0	$ 0
Troubled debt restructuring that subsequently defaulted, number of contracts | contract	0	0	0
Troubled debt restructuring that subsequently defaulted, recorded investment	$ 0	$ 0	$ 0
Commercial construction
Loan modifications determined to be troubled debt restructurings
Number of contracts | contract	0	0	0
Pre-modification outstanding recorded investment	$ 0	$ 0	$ 0
Post-modification outstanding recorded investment	$ 0	$ 0	$ 0
Troubled debt restructuring that subsequently defaulted, number of contracts | contract	0	0	0
Troubled debt restructuring that subsequently defaulted, recorded investment	$ 0	$ 0	$ 0
Residential construction
Loan modifications determined to be troubled debt restructurings
Number of contracts | contract	0	0	0
Pre-modification outstanding recorded investment	$ 0	$ 0	$ 0
Post-modification outstanding recorded investment	$ 0	$ 0	$ 0
Troubled debt restructuring that subsequently defaulted, number of contracts | contract	0	0	0
Troubled debt restructuring that subsequently defaulted, recorded investment	$ 0	$ 0	$ 0
Commercial
Loan modifications determined to be troubled debt restructurings
Number of contracts | contract	54	8	12
Pre-modification outstanding recorded investment	$ 5,380,000	$ 5,523,000	$ 2,165,000
Post-modification outstanding recorded investment	$ 869,000	$ 417,000	$ 211,000
Troubled debt restructuring that subsequently defaulted, number of contracts | contract	0	0	1
Troubled debt restructuring that subsequently defaulted, recorded investment	$ 0	$ 0	$ 246,000
Consumer
Loan modifications determined to be troubled debt restructurings
Number of contracts | contract	0	0	0
Pre-modification outstanding recorded investment	$ 0	$ 0	$ 0
Post-modification outstanding recorded investment	$ 0	$ 0	$ 0
Troubled debt restructuring that subsequently defaulted, number of contracts | contract	0	0	0
Troubled debt restructuring that subsequently defaulted, recorded investment	$ 0	$ 0	$ 0
Troubled debt restructurings real estate loans
Loan modifications determined to be troubled debt restructurings
Minimum period of payment default of loans determined to be TDRs	90 days	90 days	90 days

Bank segment (HEI only) - Colla

Bank segment (HEI only) - Collateral-dependent Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Financing Receivable, Nonaccrual [Line Items]
Total	$ 5,345,226	$ 5,120,664	$ 4,843,634
Real estate | Residential 1-4 family
Financing Receivable, Nonaccrual [Line Items]
Total	2,144,239
Real estate | Commercial real estate
Financing Receivable, Nonaccrual [Line Items]
Total	983,865
Real estate | Home equity  line of credit
Financing Receivable, Nonaccrual [Line Items]
Total	963,578
Real estate | Residential land
Financing Receivable, Nonaccrual [Line Items]
Total	15,617
Commercial
Financing Receivable, Nonaccrual [Line Items]
Total	936,748	$ 670,674	$ 587,891
Residential real estate property | Real estate | Residential 1-4 family
Financing Receivable, Nonaccrual [Line Items]
Total	2,541
Residential real estate property | Real estate | Home equity  line of credit
Financing Receivable, Nonaccrual [Line Items]
Total	1,567
Residential real estate property | Real estate | Residential land
Financing Receivable, Nonaccrual [Line Items]
Total	300
Commercial real estate | Real estate | Commercial real estate
Financing Receivable, Nonaccrual [Line Items]
Total	2,875
Business assets | Commercial
Financing Receivable, Nonaccrual [Line Items]
Total	934
Collateral Pledged
Financing Receivable, Nonaccrual [Line Items]
Total	8,217
Collateral Pledged | Real estate
Financing Receivable, Nonaccrual [Line Items]
Total	$ 7,283

Bank segment (HEI only) - Cre_4

Bank segment (HEI only) - Credit risk profile - assigned grades (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Jan. 01, 2020	Dec. 31, 2019
Credit risk profile by internally assigned grade for loans
Loans and leases receivable before fees, gross	$ 5,232,642	$ 5,067,821	$ 5,067,821
Total
Credit risk profile by internally assigned grade for loans
Loans and leases receivable before fees, gross			1,566,109
Total | Pass
Credit risk profile by internally assigned grade for loans
Loans and leases receivable before fees, gross			1,446,720
Total | Special mention
Credit risk profile by internally assigned grade for loans
Loans and leases receivable before fees, gross			34,372
Total | Substandard
Credit risk profile by internally assigned grade for loans
Loans and leases receivable before fees, gross			85,017
Total | Doubtful
Credit risk profile by internally assigned grade for loans
Loans and leases receivable before fees, gross			0
Total | Loss
Credit risk profile by internally assigned grade for loans
Loans and leases receivable before fees, gross			0
Real estate | Commercial real estate
Credit risk profile by internally assigned grade for loans
Loans and leases receivable before fees, gross			824,830
Real estate | Commercial real estate | Pass
Credit risk profile by internally assigned grade for loans
Loans and leases receivable before fees, gross			756,747
Real estate | Commercial real estate | Special mention
Credit risk profile by internally assigned grade for loans
Loans and leases receivable before fees, gross			4,451
Real estate | Commercial real estate | Substandard
Credit risk profile by internally assigned grade for loans
Loans and leases receivable before fees, gross			63,632
Real estate | Commercial real estate | Doubtful
Credit risk profile by internally assigned grade for loans
Loans and leases receivable before fees, gross			0
Real estate | Commercial real estate | Loss
Credit risk profile by internally assigned grade for loans
Loans and leases receivable before fees, gross			0
Real estate | Commercial construction
Credit risk profile by internally assigned grade for loans
Loans and leases receivable before fees, gross			70,605
Real estate | Commercial construction | Pass
Credit risk profile by internally assigned grade for loans
Loans and leases receivable before fees, gross			68,316
Real estate | Commercial construction | Special mention
Credit risk profile by internally assigned grade for loans
Loans and leases receivable before fees, gross			0
Real estate | Commercial construction | Substandard
Credit risk profile by internally assigned grade for loans
Loans and leases receivable before fees, gross			2,289
Real estate | Commercial construction | Doubtful
Credit risk profile by internally assigned grade for loans
Loans and leases receivable before fees, gross			0
Real estate | Commercial construction | Loss
Credit risk profile by internally assigned grade for loans
Loans and leases receivable before fees, gross			0
Commercial
Credit risk profile by internally assigned grade for loans
Loans and leases receivable before fees, gross			670,674
Commercial | Pass
Credit risk profile by internally assigned grade for loans
Loans and leases receivable before fees, gross			621,657
Commercial | Special mention
Credit risk profile by internally assigned grade for loans
Loans and leases receivable before fees, gross			29,921
Commercial | Substandard
Credit risk profile by internally assigned grade for loans
Loans and leases receivable before fees, gross			19,096
Commercial | Doubtful
Credit risk profile by internally assigned grade for loans
Loans and leases receivable before fees, gross			0
Commercial | Loss
Credit risk profile by internally assigned grade for loans
Loans and leases receivable before fees, gross			$ 0

Bank segment (HEI only) - Carry

Bank segment (HEI only) - Carrying Amount of Impaired Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Recorded investment:
With no related allowance recorded	$ 14,037
With an allowance recorded	26,700
Recorded investment	40,737
Unpaid principal balance:
With no related allowance recorded	15,123
With an allowance recorded	26,762
Unpaid principal balance	41,885
Related Allowance	2,691
Average recorded investment, with no related allowance recorded	17,422	$ 15,630
Average recorded investment, with an allowance recorded	27,972	22,360
Average recorded investment	45,394	37,990
Interest income recognized, with no related allowance recorded	1,400	588
Interest income recognized, with an allowance recorded	1,119	974
Interest income recognized	2,519	1,562
Residential 1-4 family
Recorded investment:
With no related allowance recorded	6,817
With an allowance recorded	8,783
Recorded investment	15,600
Unpaid principal balance:
With no related allowance recorded	7,207
With an allowance recorded	8,835
Unpaid principal balance	16,042
Related Allowance	898
Average recorded investment, with no related allowance recorded	8,169	8,595
Average recorded investment, with an allowance recorded	8,390	8,878
Average recorded investment	16,559	17,473
Interest income recognized, with no related allowance recorded	907	445
Interest income recognized, with an allowance recorded	359	363
Interest income recognized	1,266	808
Commercial real estate
Recorded investment:
With no related allowance recorded	195
With an allowance recorded	853
Recorded investment	1,048
Unpaid principal balance:
With no related allowance recorded	200
With an allowance recorded	853
Unpaid principal balance	1,053
Related Allowance	2
Average recorded investment, with no related allowance recorded	16	0
Average recorded investment, with an allowance recorded	886	982
Average recorded investment	902	982
Interest income recognized, with no related allowance recorded	0	0
Interest income recognized, with an allowance recorded	37	42
Interest income recognized	37	42
Home equity line of credit
Recorded investment:
With no related allowance recorded	1,984
With an allowance recorded	10,089
Recorded investment	12,073
Unpaid principal balance:
With no related allowance recorded	2,135
With an allowance recorded	10,099
Unpaid principal balance	12,234
Related Allowance	322
Average recorded investment, with no related allowance recorded	2,020	2,206
Average recorded investment, with an allowance recorded	11,319	10,617
Average recorded investment	13,339	12,823
Interest income recognized, with no related allowance recorded	84	75
Interest income recognized, with an allowance recorded	567	440
Interest income recognized	651	515
Residential land
Recorded investment:
With no related allowance recorded	3,091
With an allowance recorded	0
Recorded investment	3,091
Unpaid principal balance:
With no related allowance recorded	3,294
With an allowance recorded	0
Unpaid principal balance	3,294
Related Allowance	0
Average recorded investment, with no related allowance recorded	2,662	1,532
Average recorded investment, with an allowance recorded	27	37
Average recorded investment	2,689	1,569
Interest income recognized, with no related allowance recorded	129	40
Interest income recognized, with an allowance recorded	0	3
Interest income recognized	129	43
Commercial construction
Recorded investment:
With no related allowance recorded	0
With an allowance recorded	0
Recorded investment	0
Unpaid principal balance:
With no related allowance recorded	0
With an allowance recorded	0
Unpaid principal balance	0
Related Allowance	0
Average recorded investment, with no related allowance recorded	0	0
Average recorded investment, with an allowance recorded	0	0
Average recorded investment	0	0
Interest income recognized, with no related allowance recorded	0	0
Interest income recognized, with an allowance recorded	0	0
Interest income recognized	0	0
Residential construction
Recorded investment:
With no related allowance recorded	0
With an allowance recorded	0
Recorded investment	0
Unpaid principal balance:
With no related allowance recorded	0
With an allowance recorded	0
Unpaid principal balance	0
Related Allowance	0
Average recorded investment, with no related allowance recorded	0	0
Average recorded investment, with an allowance recorded	0	0
Average recorded investment	0	0
Interest income recognized, with no related allowance recorded	0	0
Interest income recognized, with an allowance recorded	0	0
Interest income recognized	0	0
Commercial
Recorded investment:
With no related allowance recorded	1,948
With an allowance recorded	6,470
Recorded investment	8,418
Unpaid principal balance:
With no related allowance recorded	2,285
With an allowance recorded	6,470
Unpaid principal balance	8,755
Related Allowance	1,015
Average recorded investment, with no related allowance recorded	4,534	3,275
Average recorded investment, with an allowance recorded	6,990	1,789
Average recorded investment	11,524	5,064
Interest income recognized, with no related allowance recorded	276	28
Interest income recognized, with an allowance recorded	132	122
Interest income recognized	408	150
Consumer
Recorded investment:
With no related allowance recorded	2
With an allowance recorded	505
Recorded investment	507
Unpaid principal balance:
With no related allowance recorded	2
With an allowance recorded	505
Unpaid principal balance	507
Related Allowance	454
Average recorded investment, with no related allowance recorded	21	22
Average recorded investment, with an allowance recorded	360	57
Average recorded investment	381	79
Interest income recognized, with no related allowance recorded	4	0
Interest income recognized, with an allowance recorded	24	4
Interest income recognized	$ 28	$ 4

Bank segment (HEI only) - Mortg

Bank segment (HEI only) - Mortgage Servicing Rights, Narrative (Details) - American Savings Bank (ASB) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Loans receivable
Repurchased mortgage loans	$ 0	$ 0	$ 0
Mortgage loans repurchase reserve	100,000	100,000
Mortgage servicing fees	3,400,000	3,000,000	3,000,000
Residential land
Loans receivable
Proceeds from sale of mortgage loans	567,700,000	277,100,000	112,200,000
Gain on sale of mortgage loans	$ 23,700,000	$ 4,900,000	$ 1,500,000

Bank segment (HEI only) - Mor_2

Bank segment (HEI only) - Mortgage Servicing Rights (Details) - American Savings Bank (ASB) - Allowance for mortgage-servicing assets – bank - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Loans receivable
Gross carrying amount	$ 22,950	$ 21,543
Accumulated amortization	(12,670)	(12,442)
Valuation allowance	(260)	0	$ 0	$ 0
Net carrying amount	$ 10,020	$ 9,101	$ 8,062

Bank segment (HEI only) - Mor_3

Bank segment (HEI only) - Mortgage Servicing Rights and Valuation Allowance Roll Forward (Details) - American Savings Bank (ASB) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Mortgage Servicing Rights [Roll Forward]
Beginning balance	$ 9,101
Ending balance	10,020	$ 9,101
Allowance for mortgage-servicing assets – bank
Mortgage Servicing Rights [Roll Forward]
Beginning balance	9,101	8,062	$ 8,639
Amount capitalized	5,096	2,987	1,045
Amortization	(3,917)	(1,948)	(1,622)
Sale of mortgage servicing rights	0	0	0
Other-than-temporary impairment	0	0	0
Ending balance	10,280	9,101	8,062
Valuation Allowance [Roll Forward]
Valuation allowance, beginning balance	0	0	0
Provision	260	0	0
Other-than-temporary impairment	0	0	0
Valuation allowance, ending balance	260	0	0
Net carrying amount	10,020	$ 9,101	$ 8,062
Estimated Aggregate Amortization Expenses of Mortgage Servicing Rights [Abstract]
2021	2,100
2022	1,700
2023	1,300
2024	1,000
2025	$ 800

Bank segment (HEI only) - Key A

Bank segment (HEI only) - Key Assumptions Used in Estimating the Fair Value of ASB's Mortgage Servicing Rights (Details) - Allowance for mortgage-servicing assets – bank $ in Thousands	12 Months Ended
	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Prepayment rate:
25 basis points adverse rate change	$ (738)	$ (950)
50 basis points adverse rate change	(1,445)	(1,947)
Discount rate:
25 basis points adverse rate change	(68)	(102)
50 basis points adverse rate change	(135)	(202)
American Savings Bank (ASB)
Mortgage Servicing Rights
Unpaid principal balance	$ 1,450,312	$ 1,276,437
Weighted average note rate	3.68%	3.96%
American Savings Bank (ASB) | Discount rate
Mortgage Servicing Rights
Weighted average measurement input	0.0925	0.0925
American Savings Bank (ASB) | Prepayment speed
Mortgage Servicing Rights
Weighted average measurement input	0.177	0.114

Bank segment (HEI only) - Depos

Bank segment (HEI only) - Deposit Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Weighted-average stated rate
Savings	0.03%	0.09%
Checking, interest-bearing	0.02%	0.09%
Checking, Noninterest-bearing	0.00%	0.00%
Commercial checking	0.00%	0.00%
Money market	0.09%	0.69%
Time certificates	0.99%	1.42%
Total weighted-average stated rate	0.09%	0.24%
Deposit liabilities
Savings	$ 2,873,727	$ 2,379,522
Checking
Interest-bearing	1,196,675	1,062,122
Noninterest-bearing	1,329,264	977,459
Commercial checking	1,269,236	932,223
Money market	169,225	150,751
Time certificates	548,830	769,825
Total Amount	7,386,957	6,271,902
Certificate accounts of $100,000 or more	121,300	302,000
Term certificates outstanding, scheduled maturities
2021	348,420
2022	88,675
2023	50,146
2024	33,944
2025	25,225
Thereafter	2,420
Total	548,830
Overdrawn deposit accounts classified as loans	1,000	2,400
Interest expense on deposit liabilities by type of deposit
Time certificates	7,944	12,675	$ 11,044
Savings	1,774	1,904	1,639
Money market	465	953	602
Interest-bearing checking	471	1,298	706
Interest expense on deposit liabilities	$ 10,654	$ 16,830	$ 13,991

Bank segment (HEI only) - Secur

Bank segment (HEI only) - Securities Sold Under Agreements to Repurchase, Including Related Collateral Received From or Pledged to Counterparties (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Securities sold under agreements to repurchase
Gross amount of recognized liabilities	$ 90,000	$ 115,000
Gross amount  offset in the  Balance Sheets	0	0
Net amount of  liabilities presented in the Balance Sheets	$ 90,000	115,000
Fair value of collateral, percent of fair value	5.00%
Repurchase liability	$ 89,670	$ 115,110
Weighted-average interest rate as of end of the period	0.02%	0.98%
Identical securities
Securities sold under agreements to repurchase
Repurchase liability	$ 89,670	$ 115,110	$ 65,040
Average amount outstanding during the year	73,738	79,598	99,162
Maximum amount outstanding as of any month-end	$ 100,580	$ 115,110	$ 152,255
Weighted-average interest rate as of end of the period	0.02%	0.98%	0.75%
Weighted-average interest rate during the year	0.42%	0.96%	0.71%
Weighted-average remaining days to maturity as of end of the period	1 day	1 day	1 day
Commercial account holders
Securities sold under agreements to repurchase
Net amount of  liabilities presented in the Balance Sheets	$ 90,000	$ 115,000
Financial instruments	92,000	130,000
Cash collateral pledged	$ 0	$ 0

Bank segment (HEI only) - Sec_2

Bank segment (HEI only) - Securities Sold Under Agreements to Repurchase (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Securities sold under agreements to repurchase
Repurchase liability	$ 89,670	$ 115,110
Weighted-average interest rate	0.02%	0.98%
Collateralized by mortgage-related securities and federal agency obligations
Securities sold under agreements to repurchase
Collateralized by mortgage-backed securities and federal agency obligations at fair value plus accrued interest	$ 92,478	$ 129,527
Overnight
Securities sold under agreements to repurchase
Repurchase liability	$ 89,670	$ 115,110
Weighted-average interest rate	0.02%	0.98%
Overnight | Collateralized by mortgage-related securities and federal agency obligations
Securities sold under agreements to repurchase
Collateralized by mortgage-backed securities and federal agency obligations at fair value plus accrued interest	$ 92,478	$ 129,527
1 to 29 days
Securities sold under agreements to repurchase
Repurchase liability	$ 0	$ 0
Weighted-average interest rate	0.00%	0.00%
1 to 29 days | Collateralized by mortgage-related securities and federal agency obligations
Securities sold under agreements to repurchase
Collateralized by mortgage-backed securities and federal agency obligations at fair value plus accrued interest	$ 0	$ 0
30 to 90 days
Securities sold under agreements to repurchase
Repurchase liability	$ 0	$ 0
Weighted-average interest rate	0.00%	0.00%
30 to 90 days | Collateralized by mortgage-related securities and federal agency obligations
Securities sold under agreements to repurchase
Collateralized by mortgage-backed securities and federal agency obligations at fair value plus accrued interest	$ 0	$ 0
Over 90 days
Securities sold under agreements to repurchase
Repurchase liability	$ 0	$ 0
Weighted-average interest rate	0.00%	0.00%
Over 90 days | Collateralized by mortgage-related securities and federal agency obligations
Securities sold under agreements to repurchase
Collateralized by mortgage-backed securities and federal agency obligations at fair value plus accrued interest	$ 0	$ 0

Bank segment (HEI only) - FHLB

Bank segment (HEI only) - FHLB Advances (Details) - American Savings Bank (ASB) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
FHLB advances	$ 0	$ 0
FHLB advances, unused funds	$ 2,100,000,000	$ 2,300,000,000

Bank segment (HEI only) - Addit

Bank segment (HEI only) - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 1988
Hawaiian Electric (parent only)
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Cash dividends paid	$ 145	$ 157	$ 154
Hawaiian Electric (parent only) | Consolidated subsidiary | American Savings Bank (ASB) | Management and administrative services
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Revenue from related party	2.3	2.3	$ 2.2
Hawaiian Electric (parent only) | Maximum
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Obligation to contribute additional capital under the Capital Maintenance Agreement				$ 65.1
Reduction in obligation to contribute additional capital under the Capital Maintenance Agreement	28.3
American Savings Bank (ASB)
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Cash dividends paid	$ 31	$ 56

Bank segment (HEI only) - Capit

Bank segment (HEI only) - Capital And Ratio (Details) - American Savings Bank (ASB) $ in Thousands	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier 1 leverage, actual capital	$ 677,786	$ 641,547
Tier 1 leverage, actual ratio	0.0838	0.0906
Tier 1 leverage, required capital	$ 323,700	$ 283,122
Tier 1 leverage, required ratio	0.0400	0.0400
Tier 1 leverage, required to be well capitalized capital	$ 404,625	$ 353,903
Tier 1 leverage, required to be well capitalized ratio	0.0500	0.0500
Common equity tier 1, actual capital		$ 641,547
Common equity tier 1, actual ratio		13.18%
Common equity tier 1, required capital		$ 219,071
Common equity tier 1, required ratio		4.50%
Common equity tier 1, required to be well capitalized, Capital		$ 316,435
Common equity tier 1, required to be well capitalized, Ratio		6.50%
Tier 1 capital, actual capital		$ 641,547
Tier 1 capital, actual ratio		0.1318
Tier 1 capital, required capital		$ 292,094
Tier 1 capital, required ratio		0.0600
Tier 1 capital, Required to be well capitalized, Capital		$ 389,459
Tier 1 capital, Required to be well capitalized, Ratio		0.0800
Total capital, Actual capital		$ 696,643
Total capital, Actual ratio		0.1431
Total capital, Required capital		$ 389,459
Total capital, Required ratio		0.0800
Total capital, Required to be well capitalized, Capital		$ 486,823
Total capital, Required to be well capitalized, Ratio		0.1000

Bank segment (HEI only) - Deriv

Bank segment (HEI only) - Derivative Financial Instruments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Derivative instrument
Net gains (losses) recognized in the Statement of Income	$ 3,781	$ 207	$ (59)
Not Designated as Hedging Instrument
Derivative instrument
Asset derivative	4,536	300
Liability derivative	500	45
Interest Rate Lock Commitments
Derivative instrument
Notional amount	120,980	23,171
Fair value	4,536	297
Interest Rate Lock Commitments | Not Designated as Hedging Instrument
Derivative instrument
Asset derivative	4,536	297
Liability derivative	0	0
Interest Rate Lock Commitments | Not Designated as Hedging Instrument | Mortgage banking income
Derivative instrument
Net gains (losses) recognized in the Statement of Income	4,239	206	(40)
Forward commitments
Derivative instrument
Notional amount	100,500	29,383
Fair value	(500)	(42)
Forward commitments | Not Designated as Hedging Instrument
Derivative instrument
Asset derivative	0	3
Liability derivative	500	45
Forward commitments | Not Designated as Hedging Instrument | Mortgage banking income
Derivative instrument
Net gains (losses) recognized in the Statement of Income	$ (458)	$ 1	$ (19)

Bank segment (HEI only) - Off B

Bank segment (HEI only) - Off Balance Sheet Arrangements and Additional Information (Detail) - USD ($) $ in Thousands	1 Months Ended
	Sep. 30, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
American Savings Bank (ASB)
Guarantees
Minimum reserve ratio	1.36%
FDIC insurance assessment		$ 2,300	$ 1,200	$ 2,500
Reserve for Off-balance Sheet Activities
Guarantees
Unused commitments to extend credit		1,963,802	1,878,791
Home equity line of credit
Guarantees
Unused commitments to extend credit		1,248,773	1,290,854
Commercial real estate
Guarantees
Unused commitments to extend credit		574,281	484,806
Consumer
Guarantees
Unused commitments to extend credit		69,168	70,088
Residential 1-4 family
Guarantees
Unused commitments to extend credit		57,862	21,131
Commercial and financial standby letters of credit
Guarantees
Unused commitments to extend credit		$ 13,718	$ 11,912

Short-term borrowings (Details)

Short-term borrowings (Details)	Jan. 29, 2021USD ($)	Dec. 29, 2020USD ($)	May 19, 2020USD ($)	Apr. 20, 2020USD ($)institution	Dec. 23, 2019USD ($)	Dec. 31, 2020USD ($)institutioninstrument	Dec. 31, 2019USD ($)instrument	Dec. 31, 2018USD ($)
Short-term borrowings
Outstanding amount						$ 129,379,000	$ 185,710,000
Proceeds from issuance of long-term debt						415,997,000	289,349,000	$ 250,000,000
Repayments of Short-term Debt						$ 150,000,000	$ 50,000,000	50,000,000
Senior notes
Short-term borrowings
Proceeds from issuance of long-term debt		$ 50,000,000
Letter of Credit | Hamakua Energy
Short-term borrowings
Number of letters of credit entered into during the period | instrument						3	3
Letters of credit outstanding						$ 6,000,000	$ 6,000,000
HEI Facility | Line of credit facility
Short-term borrowings
Increase in borrowing capacity				$ 65,000,000
Threshold debt proceeds applied as repayment of term loan				50,000,000
HEI Facility | Maximum
Short-term borrowings
Capitalization ratio required to be maintained as per the debt covenant						50.00%
Commercial paper
Short-term borrowings
Outstanding amount						$ 65,000,000	$ 97,000,000
Weighted-average interest rate						0.80%	2.30%
Term Loan
Short-term borrowings
Credit agreement				$ 65,000,000
Number of financial institutions | institution				2
Debt instrument, stated interest rate						1.90%
Term Loan | Subsequent Event
Short-term borrowings
Repayments of Short-term Debt	$ 15,000,000
Line of credit facility | Credit Facilities Effective July 2017
Short-term borrowings
Number of financial institutions | institution						8
Line of credit facility basis point spread						1.375%
Annual fees on undrawn commitments, basis points (as a percent)						0.20%
Line of credit facility | HEI Facility
Short-term borrowings
Credit agreement						$ 150,000,000
Short-term debt, net						0	$ 0
Hawaiian Electric Company, Inc. and Subsidiaries
Short-term borrowings
Proceeds from issuance of long-term debt						255,000,000	280,000,000	100,000,000
Repayments of Short-term Debt						$ 100,000,000	50,000,000	$ 0
Weighted-average interest rate						1.90%
Short-term debt, net						$ 49,979,000	88,987,000
Hawaiian Electric Company, Inc. and Subsidiaries | Credit Facilities Effective July 2017
Short-term borrowings
Ratio of consolidated subsidiary debt to total consolidated capitalization required to be maintained as per the debt covenant						65.00%
Hawaiian Electric Company, Inc. and Subsidiaries | HEI Facility
Short-term borrowings
Ratio of consolidated capitalization required to be maintained as per the debt covenant						35.00%
Hawaiian Electric Company, Inc. and Subsidiaries | Commercial paper
Short-term borrowings
Outstanding amount						$ 0	39,000,000
Hawaiian Electric Company, Inc. and Subsidiaries | Line of credit facility | Credit Facilities Effective July 2017
Short-term borrowings
Number of financial institutions | institution						8
Hawaiian Electric Company, Inc. and Subsidiaries | Line of credit facility | Hawaiian Electric Facility
Short-term borrowings
Credit agreement						$ 200,000,000
Short-term debt, net						0	$ 0
Hawaiian Electric
Short-term borrowings
Extinguishment of debt amount			$ 100,000,000
Hawaiian Electric | 364-Day Revolver | Revolving Credit Facility
Short-term borrowings
Credit agreement				$ 75,000,000
Number of financial institutions | institution				4
Line of credit outstanding						0
Hawaiian Electric | Term Loan | 364-Day Term Loan Credit Agreement
Short-term borrowings
Credit agreement					$ 50,000,000
Threshold debt proceeds applied as repayment of term loan			$ 75,000,000
Debt instrument term					364 days
Draw down of debt					$ 50,000,000
Remaining borrowing capacity						$ 50,000,000

Long-term debt - Schedule of Lo

Long-term debt - Schedule of Long-Term Debt and Maturities (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Less unamortized debt issuance costs	$ (2,249,000)	$ (2,350,000)
Long-term debt, net—other than bank	2,119,129,000	1,964,365,000
Aggregate principal payments, fiscal year maturity:
2021	55,000,000
2022	241,000,000
2023	162,000,000
2024	6,000,000
2025	103,000,000
Hawaiian Electric Company, Inc. and Subsidiaries
Debt Instrument [Line Items]
Gross long-term debt	1,569,000,000	1,505,000,000
Aggregate principal payments, fiscal year maturity:
2021	0
2022	52,000,000
2023	100,000,000
2024	0
2025	47,000,000
Special purpose revenue bonds issued on behalf of electric utility subsidiaries
Debt Instrument [Line Items]
Long-term debt, net—other than bank	1,561,302,000	1,497,667,000
Senior notes | Hawaiian Electric Company, Inc. and Subsidiaries
Debt Instrument [Line Items]
Gross long-term debt	1,027,000,000	963,000,000
Senior notes | HEI 5.67% senior notes, due 2021
Debt Instrument [Line Items]
Gross long-term debt	$ 50,000,000	50,000,000
Debt instrument, stated interest rate	5.67%
Senior notes | HEI 3.99% senior notes, due 2023
Debt Instrument [Line Items]
Gross long-term debt	$ 50,000,000	50,000,000
Debt instrument, stated interest rate	3.99%
Senior notes | HEI 4.58% senior notes, due 2025
Debt Instrument [Line Items]
Gross long-term debt	$ 50,000,000	50,000,000
Debt instrument, stated interest rate	4.58%
Senior notes | HEI 4.72% senior notes, due 2028
Debt Instrument [Line Items]
Gross long-term debt	$ 100,000,000	100,000,000
Debt instrument, stated interest rate	4.72%
Senior notes | Hamakua Energy 4.02% notes, due 2030, secured by real and personal property of Hamakua Energy, LLC
Debt Instrument [Line Items]
Gross long-term debt	$ 56,030,000	59,699,000
Debt instrument, stated interest rate	4.02%
Senior notes | Senior Notes 2.98 Percent Due 2030
Debt Instrument [Line Items]
Gross long-term debt	$ 50,000,000	0
Debt instrument, stated interest rate	2.98%
Term Loan | HEI 2.99% term loan, due 2022
Debt Instrument [Line Items]
Gross long-term debt	$ 150,000,000	150,000,000
Debt instrument, stated interest rate	2.99%
Term Loan | Ka'ie'ie Waho Company, LLC 2.79% non-recourse loan, due 2031
Debt Instrument [Line Items]
Gross long-term debt	$ 13,000,000	0
Debt instrument, stated interest rate	2.79%
Unsecured Debt | Mauo LIBOR + 1.375% loan, due 2023
Debt Instrument [Line Items]
Gross long-term debt	$ 41,046,000	$ 9,349,000
Paydown of loan balance, maximum balance	$ 7,000,000
Unsecured Debt | Mauo LIBOR + 1.375% loan, due 2023 | LIBOR
Debt Instrument [Line Items]
Line of credit facility basis point spread	1.375%

Long-term debt - Narrative (Det

Long-term debt - Narrative (Details)	Nov. 17, 2020USD ($)	Sep. 28, 2020USD ($)MW	Sep. 11, 2020USD ($)	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Debt Instrument [Line Items]
Repayments of long-term debt				$ 178,969,000	$ 287,285,000	$ 53,887,000
Hawaiian Electric Company, Inc. and Subsidiaries
Debt Instrument [Line Items]
Repayments of long-term debt				109,000,000	$ 283,546,000	$ 50,000,000
Senior notes | HEI Series 2020A
Debt Instrument [Line Items]
Debt instrument, face amount			$ 50,000,000	$ 50,000,000
Fixed coupon interest rate				0.0298%
Senior notes | HEI Series 2020B And 2020C
Debt Instrument [Line Items]
Debt instrument, face amount	$ 75,000,000
Term Loan | Non-recourse Term Loan Agreement | KWCL
Debt Instrument [Line Items]
Debt instrument, face amount		$ 13,000,000
Solar facility (in MW) | MW		6
Fixed coupon interest rate		2.79%
Minimum debt service coverage ratio		1.10
Periodic principal and interest payments		$ 400,000
Term Loan | Non-recourse Term Loan Agreement | LIBOR | KWCL
Debt Instrument [Line Items]
Line of credit facility basis point spread		2.00%
Term Loan | HEI 2.99% term loan, due 2022
Debt Instrument [Line Items]
Repayments of long-term debt	$ 15,000,000		$ 50,000,000

Long-term debt - Changes in Lon

Long-term debt - Changes in Long-term Debt (Details) - Senior notes - USD ($)	Dec. 31, 2020	Sep. 11, 2020
HEI Series 2020A
Debt Instrument [Line Items]
Aggregate principal amount	$ 50,000,000	$ 50,000,000
Fixed coupon interest rate	0.0298%
HEI Series 2020B | January 28, 2021
Debt Instrument [Line Items]
Aggregate principal amount	$ 46,000,000
Fixed coupon interest rate	0.00%
HEI Series 2020B | April 16, 2021
Debt Instrument [Line Items]
Aggregate principal amount	$ 5,000,000
Fixed coupon interest rate	0.0315%
HEI Series 2020C
Debt Instrument [Line Items]
Aggregate principal amount	$ 24,000,000
Fixed coupon interest rate	0.0282%

Long-term debt - Note Purchase

Long-term debt - Note Purchase Agreements (Details) - Senior notes - USD ($)	Oct. 29, 2020	May 14, 2020
Unsecured Senior Notes Series 2020A
Debt Instrument [Line Items]
Aggregate principal amount		$ 80,000,000
Unsecured Senior Notes Series 2020A | Hawaiian Electric
Debt Instrument [Line Items]
Aggregate principal amount		$ 50,000,000
Fixed coupon interest rate		0.0331%
Unsecured Senior Notes Series 2020A | HELCO
Debt Instrument [Line Items]
Aggregate principal amount		$ 10,000,000
Fixed coupon interest rate		0.0396%
Unsecured Senior Notes Series 2020A | Maui Electric
Debt Instrument [Line Items]
Aggregate principal amount		$ 20,000,000
Fixed coupon interest rate		0.0331%
Unsecured Senior Notes Series 2020B
Debt Instrument [Line Items]
Aggregate principal amount	$ 15,000,000	$ 60,000,000
Unsecured Senior Notes Series 2020B | Hawaiian Electric
Debt Instrument [Line Items]
Aggregate principal amount		$ 40,000,000
Fixed coupon interest rate		0.0331%
Unsecured Senior Notes Series 2020B | HELCO
Debt Instrument [Line Items]
Aggregate principal amount	$ 15,000,000
Fixed coupon interest rate	3.28%
Unsecured Senior Notes Series 2020B | Maui Electric
Debt Instrument [Line Items]
Aggregate principal amount		$ 20,000,000
Fixed coupon interest rate		0.0396%
Unsecured Senior Notes Series 2020C
Debt Instrument [Line Items]
Aggregate principal amount	$ 40,000,000	$ 20,000,000
Unsecured Senior Notes Series 2020C | Hawaiian Electric
Debt Instrument [Line Items]
Aggregate principal amount		$ 20,000,000
Fixed coupon interest rate		0.0396%
Unsecured Senior Notes Series 2020C | HELCO
Debt Instrument [Line Items]
Aggregate principal amount	$ 15,000,000
Fixed coupon interest rate	3.51%
Unsecured Senior Notes Series 2020C | Maui Electric
Debt Instrument [Line Items]
Aggregate principal amount	$ 25,000,000
Fixed coupon interest rate	3.51%
Unsecured Senior Notes Series 2020D
Debt Instrument [Line Items]
Aggregate principal amount	$ 30,000,000
Unsecured Senior Notes Series 2020D | Hawaiian Electric
Debt Instrument [Line Items]
Aggregate principal amount	$ 30,000,000
Fixed coupon interest rate	3.28%
Unsecured Senior Notes Series 2020E
Debt Instrument [Line Items]
Aggregate principal amount	$ 30,000,000
Unsecured Senior Notes Series 2020E | Hawaiian Electric
Debt Instrument [Line Items]
Aggregate principal amount	$ 30,000,000
Fixed coupon interest rate	3.51%

Shareholders' equity - Addition

Shareholders' equity - Additional Information (Details) shares in Millions	Dec. 31, 2020shares
Equity [Abstract]
Common stock reserved for future issuance (in shares)	17.4

Shareholders' equity - Accumula

Shareholders' equity - Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
AOCI Attributable to Parent [Roll Forward]
Beginning Balance	$ 2,280,260	$ 2,162,280	$ 2,097,386
Current period other comprehensive income (loss) and reclassifications, net of taxes	18,775	30,571	(8,669)
Ending Balance	2,337,502	2,280,260	2,162,280
Hawaiian Electric Company, Inc. and Subsidiaries
AOCI Attributable to Parent [Roll Forward]
Beginning Balance	2,047,352	1,957,641	1,845,283
Current period other comprehensive income (loss) and reclassifications, net of taxes	(1,640)	(1,378)	1,318
Ending Balance	2,141,918	2,047,352	1,957,641
AOCI
AOCI Attributable to Parent [Roll Forward]
Beginning Balance	(20,039)	(50,610)	(41,941)
Current period other comprehensive income (loss) and reclassifications, net of taxes	18,775	30,571	(8,669)
Ending Balance	(1,264)	(20,039)	(50,610)
AOCI | Hawaiian Electric Company, Inc. and Subsidiaries
AOCI Attributable to Parent [Roll Forward]
Beginning Balance	(1,279)	99	(1,219)
Current period other comprehensive income (loss) and reclassifications, net of taxes	(1,640)	(1,378)	1,318
Ending Balance	(2,919)	(1,279)	99
Net unrealized gains (losses) on securities
AOCI Attributable to Parent [Roll Forward]
Beginning Balance	2,481	(24,423)	(14,951)
Current period other comprehensive income (loss) and reclassifications, net of taxes	17,505	26,904	(9,472)
Ending Balance	19,986	2,481	(24,423)
Unrealized gains (losses) on derivatives
AOCI Attributable to Parent [Roll Forward]
Beginning Balance	(1,613)	(436)	0
Current period other comprehensive income (loss) and reclassifications, net of taxes	(1,750)	(1,177)	(436)
Ending Balance	(3,363)	(1,613)	(436)
Retirement benefit plans
AOCI Attributable to Parent [Roll Forward]
Beginning Balance	(20,907)	(25,751)	(26,990)
Current period other comprehensive income (loss) and reclassifications, net of taxes	3,020	4,844	1,239
Ending Balance	(17,887)	(20,907)	(25,751)
Retirement benefit plans | Hawaiian Electric Company, Inc. and Subsidiaries
AOCI Attributable to Parent [Roll Forward]
Beginning Balance	(1,279)	99	(1,219)
Current period other comprehensive income (loss) and reclassifications, net of taxes	(1,640)	(1,378)	1,318
Ending Balance	$ (2,919)	$ (1,279)	$ 99

Shareholders' equity - Reclassi

Shareholders' equity - Reclassification Out Of AOCI (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Reclassification Adjustment Out of Accumulated Other Comprehensive Income [Line Items]
Revenues	$ (652,217)	$ (641,427)	$ (608,945)	$ (677,186)	$ (725,966)	$ (770,882)	$ (715,485)	$ (661,615)	$ (2,579,775)	$ (2,873,948)	$ (2,860,849)
Total reclassifications									61,911	(6,548)	29,340
Hawaiian Electric Company, Inc. and Subsidiaries
Reclassification Adjustment Out of Accumulated Other Comprehensive Income [Line Items]
Revenues	$ (571,095)	$ (562,568)	$ (534,215)	$ (597,442)	$ (645,333)	$ (688,330)	$ (633,784)	$ (578,495)	(2,265,320)	(2,545,942)	(2,546,525)
Total reclassifications									61,410	(6,627)	27,337
Amortization of prior service credit and net losses recognized during the period in net periodic benefit cost
Reclassification Adjustment Out of Accumulated Other Comprehensive Income [Line Items]
Total reclassifications									23,689	10,107	21,015
Amortization of prior service credit and net losses recognized during the period in net periodic benefit cost | Hawaiian Electric Company, Inc. and Subsidiaries
Reclassification Adjustment Out of Accumulated Other Comprehensive Income [Line Items]
Total reclassifications									21,550	9,550	19,012
Impact of D&Os of the PUC included in regulatory assets
Reclassification Adjustment Out of Accumulated Other Comprehensive Income [Line Items]
Total reclassifications									39,860	(16,177)	8,325
Impact of D&Os of the PUC included in regulatory assets | Hawaiian Electric Company, Inc. and Subsidiaries
Reclassification Adjustment Out of Accumulated Other Comprehensive Income [Line Items]
Total reclassifications									39,860	(16,177)	8,325
Amount reclassified from AOCI | Net unrealized gains (losses) on securities
Reclassification Adjustment Out of Accumulated Other Comprehensive Income [Line Items]
Revenues									$ (1,638)	$ (478)	$ 0

Leases - (Details)

Leases - (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020USD ($)ft²	Dec. 31, 2019USD ($)	Aug. 31, 2019USD ($)ft²
Lessee, Lease, Description [Line Items]
Renewal option (up to)	10 years
Area of real estate property (in square feet) | ft²	64,000
Total present value of lease payments	$ 160,432	$ 199,571
Lessor, operating sublease, option to extend	2 years
Lessor, operating sublease, estimated base rent revenue	$ 8,300
Lease payments basis reduction for impact of collateral	0.25%
Operating lease cost	$ 74,520	73,584
Variable lease cost	229,938	205,172
Total lease cost	304,458	278,756
Cash paid for amounts included in the measurement of lease liabilities :
Cash paid for amounts included in the measurement of lease liabilities—Operating cash flows from operating leases	$ 71,584	$ 73,041
Weighted-average remaining lease term—operating leases (in years)	4 years 4 months 24 days	3 years 6 months
Weighted-average discount rate—operating leases	3.61%	3.96%
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
2021	$ 74,000
2022	51,000
2023	8,000
2024	7,000
2025	5,000
Thereafter	27,000
Total lease payments	172,000
Less: Imputed interest	(12,000)
Total present value of lease payments	160,432	$ 199,571
Operating lease, not in service, annual capacity payment	$ 7,000
FHLB Des Moines | Maximum
Lessee, Lease, Description [Line Items]
Long-term debt term	30 years
Other Operating Leases
Lessee, Lease, Description [Line Items]
Total present value of lease payments	$ 59,000
Operating lease cost	11,201	10,265
Variable lease cost	12,765	13,034
Total lease cost	23,966	23,299
Cash paid for amounts included in the measurement of lease liabilities :
Cash paid for amounts included in the measurement of lease liabilities—Operating cash flows from operating leases	$ 10,783	$ 10,447
Weighted-average remaining lease term—operating leases (in years)	8 years 10 months 24 days	6 years 6 months
Weighted-average discount rate—operating leases	2.87%	3.50%
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
2021	$ 11,000
2022	9,000
2023	8,000
2024	7,000
2025	5,000
Thereafter	27,000
Total lease payments	67,000
Less: Imputed interest	(8,000)
Total present value of lease payments	59,000
Power Purchase Agreements Qualifying As Operating Leases
Lessee, Lease, Description [Line Items]
Total present value of lease payments	101,000
Operating lease cost	63,319	$ 63,319
Variable lease cost	217,173	192,138
Total lease cost	280,492	255,457
Cash paid for amounts included in the measurement of lease liabilities :
Cash paid for amounts included in the measurement of lease liabilities—Operating cash flows from operating leases	$ 60,801	$ 62,594
Weighted-average remaining lease term—operating leases (in years)	1 year 9 months 18 days	2 years 9 months 18 days
Weighted-average discount rate—operating leases	4.08%	4.08%
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
2021	$ 63,000
2022	42,000
2023	0
2024	0
2025	0
Thereafter	0
Total lease payments	105,000
Less: Imputed interest	(4,000)
Total present value of lease payments	101,000
Hawaiian Electric Company, Inc. and Subsidiaries
Lessee, Lease, Description [Line Items]
Total present value of lease payments	134,000
Operating lease cost	69,341	$ 68,274
Variable lease cost	227,015	202,410
Total lease cost	296,356	270,684
Cash paid for amounts included in the measurement of lease liabilities :
Cash paid for amounts included in the measurement of lease liabilities—Operating cash flows from operating leases	$ 67,024	$ 68,362
Weighted-average remaining lease term—operating leases (in years)	3 years 9 months 18 days	2 years 10 months 24 days
Weighted-average discount rate—operating leases	3.84%	4.08%
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
2021	$ 69,000
2022	46,000
2023	4,000
2024	3,000
2025	3,000
Thereafter	19,000
Total lease payments	144,000
Less: Imputed interest	(10,000)
Total present value of lease payments	134,000
Hawaiian Electric Company, Inc. and Subsidiaries | Other Operating Leases
Lessee, Lease, Description [Line Items]
Total present value of lease payments	33,000
Operating lease cost	6,022	$ 4,955
Variable lease cost	9,842	10,272
Total lease cost	15,864	15,227
Cash paid for amounts included in the measurement of lease liabilities :
Cash paid for amounts included in the measurement of lease liabilities—Operating cash flows from operating leases	$ 6,223	$ 5,768
Weighted-average remaining lease term—operating leases (in years)	10 years 1 month 6 days	4 years 6 months
Weighted-average discount rate—operating leases	3.20%	4.11%
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
2021	$ 6,000
2022	4,000
2023	4,000
2024	3,000
2025	3,000
Thereafter	19,000
Total lease payments	39,000
Less: Imputed interest	(6,000)
Total present value of lease payments	33,000
Hawaiian Electric Company, Inc. and Subsidiaries | Power Purchase Agreements Qualifying As Operating Leases
Lessee, Lease, Description [Line Items]
Total present value of lease payments	101,000
Operating lease cost	63,319	$ 63,319
Variable lease cost	217,173	192,138
Total lease cost	280,492	255,457
Cash paid for amounts included in the measurement of lease liabilities :
Cash paid for amounts included in the measurement of lease liabilities—Operating cash flows from operating leases	$ 60,801	$ 62,594
Weighted-average remaining lease term—operating leases (in years)	1 year 9 months 18 days	2 years 9 months 18 days
Weighted-average discount rate—operating leases	4.08%	4.08%
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
2021	$ 63,000
2022	42,000
2023	0
2024	0
2025	0
Thereafter	0
Total lease payments	105,000
Less: Imputed interest	(4,000)
Total present value of lease payments	101,000
Honolulu
Lessee, Lease, Description [Line Items]
Area of real estate property (in square feet) | ft²			195,000
Operating lease term			12 years
Operating lease renewal term (up to)			10 years
Total present value of lease payments			$ 21,000
Lease not yet commenced expected reimbursements for improvements	$ 2,600	$ 0
Lessor, operating sublease, lease term	6 years 6 months
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
Total present value of lease payments			21,000
Honolulu | Office Space Lease, Phase 1, Commencement January 2020
Lessee, Lease, Description [Line Items]
Lease not yet commenced, annual rent expense			1,900
Lease not yet commenced expected reimbursements for improvements			5,000
Honolulu | Office Space Lease, Phase 2, Commencement January 2021
Lessee, Lease, Description [Line Items]
Lease not yet commenced, annual rent expense			1,700
Lease not yet commenced liability			19,000
Lease not yet commenced expected reimbursements for improvements			$ 4,600

Revenues (Details)

Revenues (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenue from Contract with Customer [Abstract]
General payment period									30 days
Disaggregation of Revenue [Line Items]
General payment period									30 days
Revenues from contracts with customers									$ 2,269,451	$ 2,622,025
Revenues from other sources									310,324	251,923
Revenues	$ 652,217	$ 641,427	$ 608,945	$ 677,186	$ 725,966	$ 770,882	$ 715,485	$ 661,615	2,579,775	2,873,948	$ 2,860,849
Services/goods transferred at a point in time
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									38,887	46,659
Services/goods transferred over time
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									2,230,564	2,575,366
Electric energy sales - residential
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									766,609	807,652
Electric energy sales - commercial
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									703,516	846,110
Electric energy sales - large light and power
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									751,464	905,308
Electric energy sales - other
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									8,054	16,296
Bank fees
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									38,887	46,659
Other sales
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									921	0
Regulatory revenue
Disaggregation of Revenue [Line Items]
Revenues from other sources									11,869	(54,101)
Bank interest and dividend income
Disaggregation of Revenue [Line Items]
Revenues from other sources									244,663	266,554
Other bank noninterest income
Disaggregation of Revenue [Line Items]
Revenues from other sources									29,961	14,704
Other
Disaggregation of Revenue [Line Items]
Revenues from other sources									23,831	24,766
Hawaiian Electric Company, Inc. and Subsidiaries
Disaggregation of Revenue [Line Items]
Revenue taxes, other than income tax expense									202,000	226,000	226,000
Revenue taxes accrued	$ 111,000				$ 132,000				111,000	132,000
Electric utility
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									2,229,643	2,575,366
Revenues from other sources									35,677	(29,424)
Revenues									2,265,320	2,545,942	2,546,525
Electric utility | Services/goods transferred at a point in time
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									0	0
Electric utility | Services/goods transferred over time
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									2,229,643	2,575,366
Electric utility | Electric energy sales - residential
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									766,609	807,652
Electric utility | Electric energy sales - commercial
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									703,516	846,110
Electric utility | Electric energy sales - large light and power
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									751,464	905,308
Electric utility | Electric energy sales - other
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									8,054	16,296
Electric utility | Bank fees
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									0	0
Electric utility | Other sales
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									0	0
Electric utility | Regulatory revenue
Disaggregation of Revenue [Line Items]
Revenues from other sources									11,869	(54,101)
Electric utility | Bank interest and dividend income
Disaggregation of Revenue [Line Items]
Revenues from other sources									0	0
Electric utility | Other bank noninterest income
Disaggregation of Revenue [Line Items]
Revenues from other sources									0	0
Electric utility | Other
Disaggregation of Revenue [Line Items]
Revenues from other sources									23,808	24,677
Bank
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									38,887	46,659
Revenues from other sources									274,624	281,258
Revenues									313,511	327,917	314,275
Bank | Services/goods transferred at a point in time
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									38,887	46,659
Bank | Services/goods transferred over time
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									0	0
Bank | Electric energy sales - residential
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									0	0
Bank | Electric energy sales - commercial
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									0	0
Bank | Electric energy sales - large light and power
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									0	0
Bank | Electric energy sales - other
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									0	0
Bank | Bank fees
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									38,887	46,659
Bank | Other sales
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									0	0
Bank | Regulatory revenue
Disaggregation of Revenue [Line Items]
Revenues from other sources									0	0
Bank | Bank interest and dividend income
Disaggregation of Revenue [Line Items]
Revenues from other sources									244,663	266,554
Bank | Other bank noninterest income
Disaggregation of Revenue [Line Items]
Revenues from other sources									29,961	14,704
Bank | Other
Disaggregation of Revenue [Line Items]
Revenues from other sources									0	0
Other
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									921	0
Revenues from other sources									23	89
Revenues									944	89	$ 49
Other | Services/goods transferred at a point in time
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									0	0
Other | Services/goods transferred over time
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									921	0
Other | Electric energy sales - residential
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									0	0
Other | Electric energy sales - commercial
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									0	0
Other | Electric energy sales - large light and power
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									0	0
Other | Electric energy sales - other
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									0	0
Other | Bank fees
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									0	0
Other | Other sales
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									921	0
Other | Regulatory revenue
Disaggregation of Revenue [Line Items]
Revenues from other sources									0	0
Other | Bank interest and dividend income
Disaggregation of Revenue [Line Items]
Revenues from other sources									0	0
Other | Other bank noninterest income
Disaggregation of Revenue [Line Items]
Revenues from other sources									0	0
Other | Other
Disaggregation of Revenue [Line Items]
Revenues from other sources									$ 23	$ 89

Retirement benefits - Additiona

Retirement benefits - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Vested percentage of interest of each affected participant after participating employer terminates participation	100.00%
Number of years for which regulatory asset/liability for each utility will be amortized, beginning with respective utility's next rate case	5 years
Executive life and nonqualified pension plan expenses	$ 1,100,000	$ 1,100,000
Regulatory asset charges pretax	$ 53,700,000	(21,800,000)
Fair value of plan assets, valuation difference amortized in first year	0.00%
Fair value of plan assets, valuation difference amortized in two to five years	25.00%
Number of past years for adding or subtracting the unamortized differences from fair value	4 years
Percentage of range around fair value	15.00%
Expected cash funding for qualified defined benefit plans
Defined contribution plan, expenses recognized	$ 7,000,000	7,000,000	$ 7,000,000
Cash contributions by the employer to defined contribution plan	7,000,000	7,000,000	7,000,000
Hawaiian Electric Company, Inc. and Subsidiaries
Expected cash funding for qualified defined benefit plans
Defined contribution plan, expenses recognized	3,000,000	3,000,000	2,000,000
Cash contributions by the employer to defined contribution plan	$ 3,000,000	3,000,000	2,000,000
Pension benefits
Defined Benefit Plan Disclosure [Line Items]
Expected rate of return on plan assets	7.25%
Discount rate	2.96%
Assumed discount rate, active manager premium	0.20%
Actual net return on plan assets	16.90%
Pension expense	$ 59,000,000	59,000,000	59,000,000
Expected cash funding for qualified defined benefit plans
Estimate of contributions to postretirement benefit plans in next fiscal year	52,000,000
2021	96,000,000
2022	99,000,000
2023	103,000,000
2024	107,000,000
2025	110,000,000
2026 through 2030	$ 610,000,000
Pension benefits | Hawaiian Electric Company, Inc. and Subsidiaries
Defined Benefit Plan Disclosure [Line Items]
Actual net return on plan assets	16.90%
Pension expense	$ 55,000,000	$ 57,000,000	55,000,000
Expected cash funding for qualified defined benefit plans
Estimate of contributions to postretirement benefit plans in next fiscal year	51,000,000
2021	88,000,000
2022	91,000,000
2023	93,000,000
2024	97,000,000
2025	101,000,000
2026 through 2030	$ 559,000,000
Other benefits
Defined Benefit Plan Disclosure [Line Items]
Assumed health care trend rate for medical in next fiscal year	6.75%	7.00%
Assumed health care trend rate for grading down plan in 12 fiscal years thereafter	5.00%
Assumed health care trend rate for dental in next fiscal year	5.00%	5.00%
Assumed health care trend rate for vision in next fiscal year	4.00%	4.00%
Assumed health care trend rate for grading down in 2028 and thereafter		5.00%
Postretirement benefits other than pension expense	$ (100,000)	$ (100,000)	0
Expected cash funding for qualified defined benefit plans
Estimate of contributions to postretirement benefit plans in next fiscal year	0
Other benefits | Hawaiian Electric Company, Inc. and Subsidiaries
Defined Benefit Plan Disclosure [Line Items]
Postretirement benefits other than pension expense	(200,000)	$ (300,000)	$ (100,000)
Expected cash funding for qualified defined benefit plans
Estimate of contributions to postretirement benefit plans in next fiscal year	$ 0
Minimum
Defined Benefit Plan Disclosure [Line Items]
Threshold percentage around fair value	85.00%
Maximum
Defined Benefit Plan Disclosure [Line Items]
Threshold percentage around fair value	115.00%

Retirement benefits - Changes i

Retirement benefits - Changes in Projected Benefit Obligations and Fair Value of Plan Assets and Amounts Recognized in OCI (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2020	Dec. 31, 2019
Hawaiian Electric Company, Inc. and Subsidiaries
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined benefit pension and other postretirement benefit plans liability				$ (530,532)	$ (478,763)
Pension benefits
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation, balance at the beginning of the period	$ 2,278,283	$ 1,991,384
Service cost	73,387	62,135	$ 68,987
Interest cost	81,335	84,267	77,374
Actuarial losses	275,973	224,421
Participants contributions	0	0
Benefits paid and expenses	(84,448)	(83,924)
Benefit obligation, balance at the end of the period	2,624,530	2,278,283	1,991,384
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, balance at the beginning of the period	1,799,200	1,479,067
Actual return on plan assets	302,566	354,072
Employer contributions	70,844	48,629
Participants contributions	0	0
Benefits paid and expenses	(83,119)	(82,568)
Fair value of plan assets, balance at the end of the period	2,089,491	1,799,200	1,479,067
Accrued benefit asset (liability), balance				(535,039)	(479,083)
Other assets				25,851	19,396
Defined benefit pension and other postretirement benefit plans liability				(560,890)	(498,479)
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income [Roll Forward]
AOCI debit/(credit), balance at beginning of the period (excluding impact of PUC D&Os)	503,821	536,920
Recognized during year – prior service credit (cost)	(8)	42
Recognized during year – net actuarial (losses) gains	(33,456)	(15,479)
Occurring during year – net actuarial losses (gains)	87,207	(17,662)
AOCI debit/(credit), balance at end of the period (excluding impact of PUC D&Os)	557,564	503,821	536,920
Cumulative impact of PUC D&Os				(534,594)	(474,628)
AOCI debit/(credit), balance at end of the period				22,970	29,193
Net actuarial loss				557,564	503,813
Prior service cost (gain)				0	8
AOCI debit/(credit), balance at end of the period (excluding impact of PUC D&Os)	557,564	536,920	536,920	557,564	503,821
Income taxes (benefits)				(5,988)	(7,677)
AOCI debit/(credit), net of taxes (benefits) balance at the end of the period				16,982	21,516
Pension benefits | Hawaiian Electric Company, Inc. and Subsidiaries
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation, balance at the beginning of the period	2,110,904	1,837,653
Service cost	71,604	60,461	67,359
Interest cost	75,484	77,851	71,294
Actuarial losses	260,102	212,310
Participants contributions	0	0
Benefits paid and expenses	(77,336)	(77,060)
Transfers	0	(311)
Benefit obligation, balance at the end of the period	2,440,758	2,110,904	1,837,653
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, balance at the beginning of the period	1,640,417	1,343,113
Actual return on plan assets	276,453	326,204
Employer contributions	69,720	47,808
Participants contributions	0	0
Benefits paid and expenses	(76,860)	(76,581)
Other	0	(127)
Fair value of plan assets, balance at the end of the period	1,909,730	1,640,417	1,343,113
Accrued benefit asset (liability), balance				(531,028)	(470,487)
Other liabilities (short-term)				(535)	(518)
Defined benefit pension and other postretirement benefit plans liability				(530,493)	(469,969)
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income [Roll Forward]
AOCI debit/(credit), balance at beginning of the period (excluding impact of PUC D&Os)	478,078	502,189
Recognized during year – prior service credit (cost)	(9)	(7)
Recognized during year – net actuarial (losses) gains	(30,566)	(14,658)
Occurring during year – net actuarial losses (gains)	91,018	(9,446)
AOCI debit/(credit), balance at end of the period (excluding impact of PUC D&Os)	538,521	478,078	502,189
Cumulative impact of PUC D&Os				(534,594)	(474,628)
AOCI debit/(credit), balance at end of the period				3,927	3,450
Net actuarial loss				538,521	478,069
Prior service cost (gain)				0	9
AOCI debit/(credit), balance at end of the period (excluding impact of PUC D&Os)	478,078	478,078	502,189	538,521	478,078
Income taxes (benefits)				(1,011)	(888)
AOCI debit/(credit), net of taxes (benefits) balance at the end of the period				2,916	2,562
Other benefits
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation, balance at the beginning of the period	215,639	188,666
Service cost	2,537	2,209	2,721
Interest cost	7,407	8,004	7,933
Actuarial losses	9,785	25,998
Participants contributions	2,768	2,351
Benefits paid and expenses	(11,715)	(11,589)
Benefit obligation, balance at the end of the period	226,421	215,639	188,666
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, balance at the beginning of the period	200,831	173,693
Actual return on plan assets	27,678	35,525
Employer contributions	0	0
Participants contributions	2,768	2,351
Benefits paid and expenses	(11,404)	(10,738)
Fair value of plan assets, balance at the end of the period	219,873	200,831	173,693
Accrued benefit asset (liability), balance				(6,548)	(14,808)
Other assets				0	0
Defined benefit pension and other postretirement benefit plans liability				(6,548)	(14,808)
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income [Roll Forward]
AOCI debit/(credit), balance at beginning of the period (excluding impact of PUC D&Os)	6,610	1,962
Recognized during year – prior service credit (cost)	1,761	1,806
Recognized during year – net actuarial (losses) gains	(208)	13
Occurring during year – net actuarial losses (gains)	(5,768)	2,829
AOCI debit/(credit), balance at end of the period (excluding impact of PUC D&Os)	2,395	6,610	1,962
Cumulative impact of PUC D&Os				(1,177)	(7,458)
AOCI debit/(credit), balance at end of the period				1,218	(848)
Net actuarial loss				5,731	11,707
Prior service cost (gain)				(3,336)	(5,097)
AOCI debit/(credit), balance at end of the period (excluding impact of PUC D&Os)	6,610	6,610	1,962	2,395	6,610
Income taxes (benefits)				(313)	219
AOCI debit/(credit), net of taxes (benefits) balance at the end of the period				905	(629)
Other benefits | Hawaiian Electric Company, Inc. and Subsidiaries
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation, balance at the beginning of the period	207,073	181,162
Service cost	2,515	2,191	2,704
Interest cost	7,103	7,673	7,628
Actuarial losses	9,151	25,123
Participants contributions	2,717	2,311
Benefits paid and expenses	(11,485)	(11,382)
Transfers	0	(5)
Benefit obligation, balance at the end of the period	217,074	207,073	181,162
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, balance at the beginning of the period	197,564	170,862
Actual return on plan assets	27,207	34,928
Employer contributions	0	0
Participants contributions	2,717	2,311
Benefits paid and expenses	(11,173)	(10,532)
Other	0	(5)
Fair value of plan assets, balance at the end of the period	216,315	197,564	170,862
Accrued benefit asset (liability), balance				(759)	(9,509)
Other liabilities (short-term)				(720)	(715)
Defined benefit pension and other postretirement benefit plans liability				(39)	(8,794)
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income [Roll Forward]
AOCI debit/(credit), balance at beginning of the period (excluding impact of PUC D&Os)	5,730	1,551
Recognized during year – prior service credit (cost)	1,758	1,803
Recognized during year – net actuarial (losses) gains	(207)	0
Occurring during year – net actuarial losses (gains)	(6,100)	2,376
AOCI debit/(credit), balance at end of the period (excluding impact of PUC D&Os)	1,181	5,730	1,551
Cumulative impact of PUC D&Os				(1,177)	(7,458)
AOCI debit/(credit), balance at end of the period				4	(1,728)
Net actuarial loss				4,508	10,815
Prior service cost (gain)				(3,327)	(5,085)
AOCI debit/(credit), balance at end of the period (excluding impact of PUC D&Os)	$ 1,181	$ 1,551	$ 1,551	1,181	5,730
Income taxes (benefits)				(1)	445
AOCI debit/(credit), net of taxes (benefits) balance at the end of the period				$ 3	$ (1,283)

Retirement benefits - Asset All

Retirement benefits - Asset Allocation Target and Actual Percentage (Details)	Dec. 31, 2020	Dec. 31, 2019
Pension benefits
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation	100.00%	100.00%
Asset category, Target
Target	100.00%
Pension benefits | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation	72.00%	71.00%
Asset category, Target
Target	70.00%
Pension benefits | Equity securities | Minimum
Asset category, Target
Target	65.00%
Pension benefits | Equity securities | Maximum
Asset category, Target
Target	75.00%
Pension benefits | Fixed income securities
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation	28.00%	29.00%
Asset category, Target
Target	30.00%
Pension benefits | Fixed income securities | Minimum
Asset category, Target
Target	25.00%
Pension benefits | Fixed income securities | Maximum
Asset category, Target
Target	35.00%
Other benefits
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation	100.00%	100.00%
Asset category, Target
Target	100.00%
Other benefits | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation	73.00%	71.00%
Asset category, Target
Target	70.00%
Other benefits | Equity securities | Minimum
Asset category, Target
Target	65.00%
Other benefits | Equity securities | Maximum
Asset category, Target
Target	75.00%
Other benefits | Fixed income securities
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation	27.00%	29.00%
Asset category, Target
Target	30.00%
Other benefits | Fixed income securities | Minimum
Asset category, Target
Target	25.00%
Other benefits | Fixed income securities | Maximum
Asset category, Target
Target	35.00%

Retirement benefits - Assets He

Retirement benefits - Assets Held In Retirement Benefit Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Pension benefits
Fair value measurements on a recurring basis
Fair value of plan assets	$ 2,089,491	$ 1,799,200	$ 1,479,067
Other benefits
Fair value measurements on a recurring basis
Fair value of plan assets	219,873	200,831	$ 173,693
Fair value measurements on a recurring basis | Pension benefits
Fair value measurements on a recurring basis
Fair value of plan assets	2,089,000	1,799,000
Fair value measurements on a recurring basis | Pension benefits | Total, excluding cash, receivables and payables, net
Fair value measurements on a recurring basis
Fair value of plan assets	2,085,000	1,795,000
Fair value measurements on a recurring basis | Pension benefits | Equity investments
Fair value measurements on a recurring basis
Fair value of plan assets	$ 1,376,000	$ 1,158,000
Fair value measurements on a recurring basis | Pension benefits | Non-U.S. Equity Funds
Fair value measurements on a recurring basis
Redemption frequency, daily	62.00%	60.00%
Redemption frequency, monthly	38.00%	40.00%
Fair value measurements on a recurring basis | Pension benefits | Fixed income securities
Fair value measurements on a recurring basis
Fair value of plan assets	$ 641,000	$ 598,000
Fair value measurements on a recurring basis | Pension benefits | Cash, receivables and payables, net
Fair value measurements on a recurring basis
Fair value of plan assets	4,000	4,000
Fair value measurements on a recurring basis | Other benefits
Fair value measurements on a recurring basis
Fair value of plan assets	220,000	201,000
Fair value measurements on a recurring basis | Other benefits | Total, excluding cash, receivables and payables, net
Fair value measurements on a recurring basis
Fair value of plan assets	220,000	201,000
Fair value measurements on a recurring basis | Other benefits | Equity investments
Fair value measurements on a recurring basis
Fair value of plan assets	$ 158,000	$ 141,000
Fair value measurements on a recurring basis | Other benefits | Non-U.S. Equity Funds
Fair value measurements on a recurring basis
Redemption frequency, daily	58.00%	59.00%
Redemption frequency, monthly	42.00%	41.00%
Fair value measurements on a recurring basis | Other benefits | Fixed income securities
Fair value measurements on a recurring basis
Fair value of plan assets	$ 58,000	$ 56,000
Fair value measurements on a recurring basis | Other benefits | Cash, receivables and payables, net
Fair value measurements on a recurring basis
Fair value of plan assets	0	0
Fair value measurements on a recurring basis | Fair Value, Inputs, Level 1, 2 and 3 | Pension benefits | Equity securities
Fair value measurements on a recurring basis
Fair value of plan assets	540,000	470,000
Fair value measurements on a recurring basis | Fair Value, Inputs, Level 1, 2 and 3 | Pension benefits | Equity index and exchange-traded funds
Fair value measurements on a recurring basis
Fair value of plan assets	734,000	610,000
Fair value measurements on a recurring basis | Fair Value, Inputs, Level 1, 2 and 3 | Pension benefits | Fixed income securities
Fair value measurements on a recurring basis
Fair value of plan assets	363,000	353,000
Fair value measurements on a recurring basis | Fair Value, Inputs, Level 1, 2 and 3 | Other benefits | Equity securities
Fair value measurements on a recurring basis
Fair value of plan assets	68,000	61,000
Fair value measurements on a recurring basis | Fair Value, Inputs, Level 1, 2 and 3 | Other benefits | Equity index and exchange-traded funds
Fair value measurements on a recurring basis
Fair value of plan assets	77,000	69,000
Fair value measurements on a recurring basis | Fair Value, Inputs, Level 1, 2 and 3 | Other benefits | Fixed income securities
Fair value measurements on a recurring basis
Fair value of plan assets	53,000	52,000
Fair value measurements on a recurring basis | Level 1 | Pension benefits | Total, excluding cash, receivables and payables, net
Fair value measurements on a recurring basis
Fair value of plan assets	1,404,000	1,203,000
Fair value measurements on a recurring basis | Level 1 | Pension benefits | Equity investments
Fair value measurements on a recurring basis
Fair value of plan assets	1,274,000	1,080,000
Fair value measurements on a recurring basis | Level 1 | Pension benefits | Equity securities
Fair value measurements on a recurring basis
Fair value of plan assets	540,000	470,000
Fair value measurements on a recurring basis | Level 1 | Pension benefits | Equity index and exchange-traded funds
Fair value measurements on a recurring basis
Fair value of plan assets	734,000	610,000
Fair value measurements on a recurring basis | Level 1 | Pension benefits | Fixed income securities
Fair value measurements on a recurring basis
Fair value of plan assets	105,000	123,000
Fair value measurements on a recurring basis | Level 1 | Pension benefits | Cash equivalents, fund and at NAV
Fair value measurements on a recurring basis
Fair value of plan assets	25,000
Fair value measurements on a recurring basis | Level 1 | Other benefits | Total, excluding cash, receivables and payables, net
Fair value measurements on a recurring basis
Fair value of plan assets	199,000	179,000
Fair value measurements on a recurring basis | Level 1 | Other benefits | Equity investments
Fair value measurements on a recurring basis
Fair value of plan assets	145,000	130,000
Fair value measurements on a recurring basis | Level 1 | Other benefits | Equity securities
Fair value measurements on a recurring basis
Fair value of plan assets	68,000	61,000
Fair value measurements on a recurring basis | Level 1 | Other benefits | Equity index and exchange-traded funds
Fair value measurements on a recurring basis
Fair value of plan assets	77,000	69,000
Fair value measurements on a recurring basis | Level 1 | Other benefits | Fixed income securities
Fair value measurements on a recurring basis
Fair value of plan assets	51,000	49,000
Fair value measurements on a recurring basis | Level 1 | Other benefits | Cash equivalents, fund and at NAV
Fair value measurements on a recurring basis
Fair value of plan assets	3,000
Fair value measurements on a recurring basis | Level 2 | Pension benefits | Total, excluding cash, receivables and payables, net
Fair value measurements on a recurring basis
Fair value of plan assets	258,000	230,000
Fair value measurements on a recurring basis | Level 2 | Pension benefits | Equity investments
Fair value measurements on a recurring basis
Fair value of plan assets	0	0
Fair value measurements on a recurring basis | Level 2 | Pension benefits | Equity securities
Fair value measurements on a recurring basis
Fair value of plan assets	0	0
Fair value measurements on a recurring basis | Level 2 | Pension benefits | Equity index and exchange-traded funds
Fair value measurements on a recurring basis
Fair value of plan assets	0	0
Fair value measurements on a recurring basis | Level 2 | Pension benefits | Fixed income securities
Fair value measurements on a recurring basis
Fair value of plan assets	258,000	230,000
Fair value measurements on a recurring basis | Level 2 | Other benefits | Total, excluding cash, receivables and payables, net
Fair value measurements on a recurring basis
Fair value of plan assets	2,000	2,000
Fair value measurements on a recurring basis | Level 2 | Other benefits | Equity investments
Fair value measurements on a recurring basis
Fair value of plan assets	0	0
Fair value measurements on a recurring basis | Level 2 | Other benefits | Equity securities
Fair value measurements on a recurring basis
Fair value of plan assets	0	0
Fair value measurements on a recurring basis | Level 2 | Other benefits | Equity index and exchange-traded funds
Fair value measurements on a recurring basis
Fair value of plan assets	0	0
Fair value measurements on a recurring basis | Level 2 | Other benefits | Fixed income securities
Fair value measurements on a recurring basis
Fair value of plan assets	2,000	2,000
Fair value measurements on a recurring basis | Level 3 | Pension benefits | Total, excluding cash, receivables and payables, net
Fair value measurements on a recurring basis
Fair value of plan assets	0	0
Fair value measurements on a recurring basis | Level 3 | Pension benefits | Equity investments
Fair value measurements on a recurring basis
Fair value of plan assets	0	0
Fair value measurements on a recurring basis | Level 3 | Pension benefits | Equity securities
Fair value measurements on a recurring basis
Fair value of plan assets	0	0
Fair value measurements on a recurring basis | Level 3 | Pension benefits | Equity index and exchange-traded funds
Fair value measurements on a recurring basis
Fair value of plan assets	0	0
Fair value measurements on a recurring basis | Level 3 | Pension benefits | Fixed income securities
Fair value measurements on a recurring basis
Fair value of plan assets	0	0
Fair value measurements on a recurring basis | Level 3 | Other benefits | Total, excluding cash, receivables and payables, net
Fair value measurements on a recurring basis
Fair value of plan assets	0	0
Fair value measurements on a recurring basis | Level 3 | Other benefits | Equity investments
Fair value measurements on a recurring basis
Fair value of plan assets	0	0
Fair value measurements on a recurring basis | Level 3 | Other benefits | Equity securities
Fair value measurements on a recurring basis
Fair value of plan assets	0	0
Fair value measurements on a recurring basis | Level 3 | Other benefits | Equity index and exchange-traded funds
Fair value measurements on a recurring basis
Fair value of plan assets	0	0
Fair value measurements on a recurring basis | Level 3 | Other benefits | Fixed income securities
Fair value measurements on a recurring basis
Fair value of plan assets	0	0
Fair value measurements on a recurring basis | Net Asset Value | Pension benefits
Fair value measurements on a recurring basis
Fair value of plan assets	423,000	362,000
Fair value measurements on a recurring basis | Net Asset Value | Pension benefits | Equity investments
Fair value measurements on a recurring basis
Fair value of plan assets	102,000	78,000
Fair value measurements on a recurring basis | Net Asset Value | Pension benefits | Non-U.S. Equity Funds
Fair value measurements on a recurring basis
Fair value of plan assets	$ 102,000	$ 78,000
Fair value measurements on a recurring basis | Net Asset Value | Pension benefits | Non-U.S. Equity Funds | Minimum
Fair value measurements on a recurring basis
Redemption notice period (in days)	5 days	5 days
Fair value measurements on a recurring basis | Net Asset Value | Pension benefits | Non-U.S. Equity Funds | Maximum
Fair value measurements on a recurring basis
Redemption notice period (in days)	30 days	30 days
Fair value measurements on a recurring basis | Net Asset Value | Pension benefits | Fixed income securities
Fair value measurements on a recurring basis
Fair value of plan assets	$ 278,000	$ 245,000
Redemption notice period (in days)	15 days	15 days
Fair value measurements on a recurring basis | Net Asset Value | Pension benefits | Cash equivalents, fund and at NAV
Fair value measurements on a recurring basis
Fair value of plan assets	$ 68,000
Fair value measurements on a recurring basis | Net Asset Value | Pension benefits | Cash equivalents
Fair value measurements on a recurring basis
Fair value of plan assets	$ 43,000	$ 39,000
Fair value measurements on a recurring basis | Net Asset Value | Pension benefits | Cash equivalents | Minimum
Fair value measurements on a recurring basis
Redemption notice period (in days)	0 days	0 days
Fair value measurements on a recurring basis | Net Asset Value | Pension benefits | Cash equivalents | Maximum
Fair value measurements on a recurring basis
Redemption notice period (in days)	1 day	1 day
Fair value measurements on a recurring basis | Net Asset Value | Other benefits
Fair value measurements on a recurring basis
Fair value of plan assets	$ 19,000	$ 19,000
Fair value measurements on a recurring basis | Net Asset Value | Other benefits | Equity investments
Fair value measurements on a recurring basis
Fair value of plan assets	13,000	11,000
Fair value measurements on a recurring basis | Net Asset Value | Other benefits | Non-U.S. Equity Funds
Fair value measurements on a recurring basis
Fair value of plan assets	$ 13,000	$ 11,000
Fair value measurements on a recurring basis | Net Asset Value | Other benefits | Non-U.S. Equity Funds | Minimum
Fair value measurements on a recurring basis
Redemption notice period (in days)	5 days	5 days
Fair value measurements on a recurring basis | Net Asset Value | Other benefits | Non-U.S. Equity Funds | Maximum
Fair value measurements on a recurring basis
Redemption notice period (in days)	30 days	30 days
Fair value measurements on a recurring basis | Net Asset Value | Other benefits | Fixed income securities
Fair value measurements on a recurring basis
Fair value of plan assets	$ 5,000	$ 4,000
Redemption notice period (in days)	15 days	15 days
Fair value measurements on a recurring basis | Net Asset Value | Other benefits | Cash equivalents, fund and at NAV
Fair value measurements on a recurring basis
Fair value of plan assets	$ 4,000
Fair value measurements on a recurring basis | Net Asset Value | Other benefits | Cash equivalents
Fair value measurements on a recurring basis
Fair value of plan assets	$ 1,000	$ 4,000
Fair value measurements on a recurring basis | Net Asset Value | Other benefits | Cash equivalents | Minimum
Fair value measurements on a recurring basis
Redemption notice period (in days)	0 days	0 days
Fair value measurements on a recurring basis | Net Asset Value | Other benefits | Cash equivalents | Maximum
Fair value measurements on a recurring basis
Redemption notice period (in days)	1 day	1 day

Retirement benefits - Weighted

Retirement benefits - Weighted Average Assumptions (Details)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Benefit obligation
Rate of compensation increase	3.50%	3.50%	3.50%
Pension benefits
Benefit obligation
Discount rate	2.92%	3.61%	4.31%
Net periodic pension/benefit cost (years ended)
Discount rate	3.61%	4.31%	3.74%
Expected return on plan assets	7.25%	7.25%	7.50%
Rate of compensation increase	3.50%	3.50%	3.50%
Pension benefits | American Savings Bank (ASB)
Benefit obligation
Discount rate	2.76%	3.49%
Net periodic pension/benefit cost (years ended)
Discount rate	3.49%
Expected return on plan assets	3.69%	4.51%	3.94%
Other benefits
Benefit obligation
Discount rate	2.83%	3.52%	4.34%
Net periodic pension/benefit cost (years ended)
Discount rate	3.52%	4.34%	3.72%
Expected return on plan assets	7.25%	7.25%	7.50%

Retirement benefits - Component

Retirement benefits - Components of NPPC and NPBC (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Pension benefits
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	$ 73,387	$ 62,135	$ 68,987
Interest cost	81,335	84,267	77,374
Expected return on plan assets	(113,800)	(111,989)	(108,953)
Amortization of net prior service gain	8	(42)	(42)
Amortization of net actuarial losses	33,456	15,479	30,084
Net periodic pension/benefit cost	74,386	49,850	67,450
Impact of PUC D&Os	20,997	48,143	25,828
Net periodic pension/benefit cost (adjusted for impact of PUC D&Os)	95,383	97,993	93,278
Pension benefits | Hawaiian Electric Company, Inc. and Subsidiaries
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	71,604	60,461	67,359
Interest cost	75,484	77,851	71,294
Expected return on plan assets	(107,369)	(104,632)	(102,368)
Amortization of net prior service gain	9	7	8
Amortization of net actuarial losses	30,566	14,658	27,302
Net periodic pension/benefit cost	70,294	48,345	63,595
Impact of PUC D&Os	20,997	48,143	25,828
Net periodic pension/benefit cost (adjusted for impact of PUC D&Os)	91,291	96,488	89,423
Other benefits
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	2,537	2,209	2,721
Interest cost	7,407	8,004	7,933
Expected return on plan assets	(12,124)	(12,356)	(12,908)
Amortization of net prior service gain	(1,761)	(1,806)	(1,805)
Amortization of net actuarial losses	208	(13)	95
Net periodic pension/benefit cost	(3,733)	(3,962)	(3,964)
Impact of PUC D&Os	3,179	3,258	3,842
Net periodic pension/benefit cost (adjusted for impact of PUC D&Os)	(554)	(704)	(122)
Other benefits | Hawaiian Electric Company, Inc. and Subsidiaries
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	2,515	2,191	2,704
Interest cost	7,103	7,673	7,628
Expected return on plan assets	(11,957)	(12,180)	(12,713)
Amortization of net prior service gain	(1,758)	(1,803)	(1,803)
Amortization of net actuarial losses	207	0	98
Net periodic pension/benefit cost	(3,890)	(4,119)	(4,086)
Impact of PUC D&Os	3,179	3,258	3,842
Net periodic pension/benefit cost (adjusted for impact of PUC D&Os)	$ (711)	$ (861)	$ (244)

Retirement benefits - ABO and P

Retirement benefits - ABO and PBO in Excess of Plan Assets (Details) - Pension benefits - USD ($) $ in Billions	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plans - ABOs	$ 2.3	$ 2
Defined benefit plans with ABO in excess of plan assets
ABOs	2.1	1.9
Fair value of plan assets	2	1.7
Defined benefit plans with PBOs in excess of plan assets
PBOs	2.5	2.2
Fair value of plan assets	2	1.7
Hawaiian Electric Company, Inc. and Subsidiaries
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plans - ABOs	2.1	1.8
Defined benefit plans with ABO in excess of plan assets
ABOs	2.1	1.8
Fair value of plan assets	1.9	1.6
Defined benefit plans with PBOs in excess of plan assets
PBOs	2.4	2.1
Fair value of plan assets	$ 1.9	$ 1.6

Share-based compensation - Addi

Share-based compensation - Additional Information (Details) $ in Millions	Jun. 26, 2019shares	Mar. 01, 2014shares	Dec. 31, 2020USD ($)incrementshares	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Share-based compensation
Income tax benefit			$ 1	$ 1.4	$ 1.1
Long-term incentive plan (LTIP)
Share-based compensation
Performance period			3 years
Exception to forfeiture, minimum requisite service period			12 months
Payout low end of range			0.00%
Payout high end of range			200.00%
Restricted stock units
Share-based compensation
Fair value			$ 4.2	3.2	2.7
Income tax benefit			0.7	$ 0.5	$ 0.4
Unrecognized compensation cost			$ 5
Weighted-average period over which unrecognized compensation cost expected to be recognized			2 years 7 months 6 days
LTIP linked to TRS
Share-based compensation
Fair value			$ 2.6
Income tax benefit			0.4
Unrecognized compensation cost			$ 1.2
Weighted-average period over which unrecognized compensation cost expected to be recognized			1 year 4 months 24 days
LTIP awards linked to other performance conditions
Share-based compensation
Fair value			$ 7.6
Income tax benefit			1.2
Unrecognized compensation cost			$ 4.2
Weighted-average period over which unrecognized compensation cost expected to be recognized			1 year 4 months 24 days
Equity and Incentive Plan (EIP)
Share-based compensation
Additional shares available for issuance | shares		1,500,000
Shares remaining available for future issuance | shares			3,000,000
Shares that can be issued upon vesting of outstanding units and achievement of performance goals | shares			600,000
Equity and Incentive Plan (EIP) | Restricted shares
Share-based compensation
The number of equal annual increments for which the awards become unrestricted (in installments) | increment			4
Nonemployee Director Stock Plan
Share-based compensation
Additional shares available for issuance | shares	300,000
Shares remaining available for future issuance | shares			274,163

Share-based compensation - Rela

Share-based compensation - Related Income Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 5.8	$ 10	$ 7.8
Income tax benefit	1	1.4	1.1
Hawaiian Electric Company, Inc. and Subsidiaries
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	1.8	3.2	2.7
Income tax benefit	$ 0.4	$ 0.6	$ 0.5

Share-based compensation - The

Share-based compensation - The 2011 Director Plan (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Income tax benefit	$ 1	$ 1.4	$ 1.1
Common stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted (in shares)	36,100	36,344	38,821
Fair value	$ 1.3	$ 1.6	$ 1.3
Income tax benefit	$ 0.3	$ 0.4	$ 0.3

Share-based compensation - Rest

Share-based compensation - Restricted Stock Units (Details) - Restricted stock units - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation, Restricted Shares [Roll Forward]
Outstanding, beginning of period (in shares)	207,641	200,358	197,047
Granted (in shares)	78,595	96,565	93,853
Vested (in shares)	(77,719)	(76,813)	(75,683)
Forfeited (in shares)	(14,578)	(12,469)	(14,859)
Outstanding, end of period (in shares)	193,939	207,641	200,358
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Outstanding, beginning of period (in dollars per share)	$ 35.36	$ 33.05	$ 31.53
Granted (in dollars per share)	47.99	37.82	34.12
Vested (in dollars per share)	34.19	32.61	30.56
Forfeited (in dollars per share)	36.20	34.20	32.35
Outstanding, end of period (in dollars per share)	$ 40.89	$ 35.36	$ 33.05
Total weighted-average grant-date fair value	$ 3.8	$ 3.7	$ 3.2

Share-based compensation - LTIP

Share-based compensation - LTIP Linked to TRS (Details) - LTIP linked to TRS - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation, Restricted Shares [Roll Forward]
Outstanding, beginning of period (in shares)	96,402	65,578	32,904
Granted (in shares)	24,630	35,215	37,832
Vested (issued or unissued and cancelled) (in shares)	(29,409)	0	0
Forfeited (in shares)	(2,401)	(4,391)	(5,158)
Outstanding, end of period (in shares)	89,222	96,402	65,578
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Outstanding, beginning of period (in dollars per share)	$ 39.62	$ 38.81	$ 39.51
Granted (in dollars per share)	48.62	41.07	38.21
Vested (issued or unissued and cancelled) (in dollars per share)	39.51	0	0
Forfeited (in dollars per share)	41.22	39.19	38.84
Outstanding, end of period (in dollars per share)	$ 42.10	$ 39.62	$ 38.81
Total weighted-average grant-date fair value	$ 1.2	$ 1.4	$ 1.4

Share-based compensation - Assu

Share-based compensation - Assumptions to Determine the Fair Value of LTIP Awards Linked to TRS (Details) - LTIP linked to TRS - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate	1.39%	2.48%	2.29%
Expected life (in years)	3 years	3 years	3 years
Expected volatility	13.10%	15.80%	17.00%
Range of expected volatility for Peer Group, minimum	13.60%	15.00%	15.10%
Range of expected volatility for Peer Group, maximum	95.40%	73.20%	26.20%
Grant date fair value (in dollars per share)	$ 48.62	$ 41.07	$ 38.20

Share-based compensation - LT_2

Share-based compensation - LTIP Awards Linked To Other Performance Conditions (Details) - LTIP awards linked to other performance conditions - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation, Restricted Shares [Roll Forward]
Outstanding, beginning of period (in shares)	403,768	276,169	131,616
Granted (in shares)	98,522	140,855	151,328
Vested (in shares)	(135,804)	0	0
Increased above target (cancelled) (in shares)	(136,163)	4,314	13,858
Forfeited (in shares)	(9,608)	(17,570)	(20,633)
Outstanding, end of period (in shares)	220,715	403,768	276,169
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Outstanding, beginning of period (in dollars per share)	$ 35.15	$ 33.80	$ 33.47
Granted (in dollars per share)	48.10	37.78	34.12
Vested (in dollars per share)	33.48	0	0
Increased above target (cancelled) (in dollars per share)	36.44	33.53	33.49
Forfeited (in dollars per share)	38.36	34.66	33.80
Outstanding, end of period (in dollars per share)	$ 41.03	$ 35.15	$ 33.80
Total weighted-average grant-date fair value	$ 4.7	$ 5.3	$ 5.2

Income taxes - Components of In

Income taxes - Components of Income Taxes Attributable to Net Income for Common Stock (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Federal
Current	$ 23,207	$ 28,736	$ 42,903
Deferred	(4,215)	(4,353)	(6,099)
Deferred tax credits, net	10,979	13,410	(12)
Federal taxes	29,971	37,793	36,792
State
Current	8,430	10,472	17,361
Deferred	2,509	(10,732)	(3,269)
Deferred tax credits, net	0	14,104	(87)
State taxes	10,939	13,844	14,005
Total	40,910	51,637	50,797
Hawaiian Electric Company, Inc. and Subsidiaries
Federal
Current	31,950	21,751	29,649
Deferred	(5,408)	(7,793)	(5,245)
Deferred tax credits, net	1,549	13,155	(12)
Federal taxes	28,091	27,113	24,392
State
Current	3,768	5,579	13,210
Deferred	8,559	(8,491)	(2,737)
Deferred tax credits, net	0	14,104	(87)
State taxes	12,327	11,192	10,386
Total	$ 40,418	$ 38,305	$ 34,778

Income taxes - Income Tax Recon

Income taxes - Income Tax Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Expense (Benefit) [Line Items]
Amount at the federal statutory income tax rate	$ 50,531	$ 56,996	$ 53,437
Increase (decrease) resulting from:
State income taxes, net of federal income tax benefit	9,448	11,658	11,832
Net deferred tax asset (liability) adjustment related to the Tax Act	(11,267)	(9,255)	(9,540)
Other, net	(7,802)	(7,762)	(4,932)
Total	$ 40,910	$ 51,637	$ 50,797
Effective income tax rate	17.00%	19.00%	20.00%
Hawaiian Electric Company, Inc. and Subsidiaries
Income Tax Expense (Benefit) [Line Items]
Amount at the federal statutory income tax rate	$ 44,468	$ 41,399	$ 37,889
Increase (decrease) resulting from:
State income taxes, net of federal income tax benefit	9,658	8,703	8,080
Net deferred tax asset (liability) adjustment related to the Tax Act	(11,267)	(9,255)	(9,285)
Other, net	(2,441)	(2,542)	(1,906)
Total	$ 40,418	$ 38,305	$ 34,778
Effective income tax rate	19.10%	19.40%	19.30%

Income taxes - Deferred Tax Ass

Income taxes - Deferred Tax Assets and Liabilities Due to Book/Tax Differences (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Deferred tax assets
Regulatory liabilities, excluding amounts attributable to property, plant and equipment	$ 93,684	$ 100,427
Operating lease liabilities	41,582	51,573
Revenue taxes	22,726	20,922
Allowance for bad debts	31,973	14,858
Other	44,127	33,106
Total deferred tax assets	234,092	220,886
Deferred tax liabilities
Property, plant and equipment related	487,209	464,312
Operating lease right-of-use assets	41,370	51,542
Regulatory assets, excluding amounts attributable to property, plant and equipment	25,841	33,897
Retirement benefits	18,407	9,684
Other	56,354	40,776
Total deferred tax liabilities	629,181	600,211
Net deferred income tax liability	395,089	379,325
Deferred tax assets, tax credit carryforwards	10,900
Hawaiian Electric Company, Inc. and Subsidiaries
Deferred tax assets
Regulatory liabilities, excluding amounts attributable to property, plant and equipment	93,684	100,427
Operating lease liabilities	34,586	45,608
Revenue taxes	22,726	20,922
Allowance for bad debts	4,835	560
Other	24,741	20,259
Total deferred tax assets	180,572	187,776
Deferred tax liabilities
Property, plant and equipment related	473,734	458,349
Operating lease right-of-use assets	34,586	45,608
Regulatory assets, excluding amounts attributable to property, plant and equipment	25,841	33,897
Retirement benefits	20,537	13,072
Other	23,672	14,001
Total deferred tax liabilities	578,370	564,927
Net deferred income tax liability	397,798	$ 377,151
Deferred tax assets, tax credit carryforwards	5,800
State and Local Jurisdiction
Deferred tax liabilities
Tax credit carryforward	14,600
State and Local Jurisdiction | Hawaiian Electric Company, Inc. and Subsidiaries
Deferred tax liabilities
Tax credit carryforward	$ 7,800

Income taxes - Additional Infor

Income taxes - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Expense (Benefit) [Line Items]
Deferred tax assets, valuation allowance	$ 0	$ 0
Unrecognized tax benefits that would impact effective tax rate	500,000	500,000
Credit adjustments to interest expense on income taxes	(500,000)	100,000	$ (100,000)
Amount of accrued interest related to uncertain tax positions	100,000	600,000
Hawaiian Electric Company, Inc. and Subsidiaries
Income Tax Expense (Benefit) [Line Items]
Unrecognized tax benefits that would impact effective tax rate	11,600,000	0
Credit adjustments to interest expense on income taxes	(300,000)	100,000	$ 100,000
Amount of accrued interest related to uncertain tax positions	$ 100,000	$ 400,000

Income taxes - Changes in Unrec

Income taxes - Changes in Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Changes in total unrecognized tax benefits
Unrecognized tax benefits, at the beginning of the period	$ 2.2	$ 2.1	$ 4
Additions based on tax positions taken during the year	0.2	0.5	0.3
Reductions based on tax positions taken during the year	0	0	0
Additions for tax positions of prior years	11.6	0.1	0.1
Reductions for tax positions of prior years	(0.1)	(0.2)	(0.1)
Lapses of statute of limitations	(0.2)	(0.3)	(2.2)
Settlement	(1)	0	0
Unrecognized tax benefits, at the end of the period	12.7	2.2	2.1
Hawaiian Electric Company, Inc. and Subsidiaries
Changes in total unrecognized tax benefits
Unrecognized tax benefits, at the beginning of the period	1.7	1.6	3.5
Additions based on tax positions taken during the year	0.2	0.5	0.3
Reductions based on tax positions taken during the year	0	0	0
Additions for tax positions of prior years	11.6	0.1	0.1
Reductions for tax positions of prior years	(0.1)	(0.2)	(0.1)
Lapses of statute of limitations	(0.2)	(0.3)	(2.2)
Settlement	(0.5)	0	0
Unrecognized tax benefits, at the end of the period	$ 12.7	$ 1.7	$ 1.6

Cash flows (Details)

Cash flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Supplemental disclosures of cash flow information
Interest paid to non-affiliates, net of amounts capitalized	$ 98,000	$ 107,000	$ 102,000
Income taxes paid (including refundable credits)	32,000	56,000	72,000
Income taxes refunded (including refundable credits)	3,000	4,000	34,000
Supplemental disclosures of noncash activities
Unpaid invoices and accruals for capital expenditures, balance, end of period (investing)	44,000	64,000	59,000
Right-of-use assets obtained in exchange for operating lease obligations (investing)	26,000	7,000	0
Common stock issued (gross) for director and executive/management compensation (financing)	16,000	5,000	4,000
Obligations to fund low income housing investments, net (investing)	25,000	11,000	12,000
Transfer of retail repurchase agreements to deposit liabilities (financing)	0	0	102,000
Hawaiian Electric Company, Inc. and Subsidiaries
Supplemental disclosures of cash flow information
Interest paid to non-affiliates, net of amounts capitalized	65,000	68,000	73,000
Income taxes paid (including refundable credits)	41,000	55,000	64,000
Income taxes refunded (including refundable credits)	3,000	4,000	31,000
Supplemental disclosures of noncash activities
Unpaid invoices and accruals for capital expenditures, balance, end of period (investing)	41,000	62,000	44,000
Right-of-use assets obtained in exchange for operating lease obligations (investing)	17,000	2,000	0
Estimated fair value of noncash contributions in aid of construction (investing)	10,000	9,000	14,000
Acquisition of Hawaiian Telcom’s interest in joint poles (investing)	0	0	48,000
Reduction of long-term debt from funds previously transferred for repayment (financing)	$ 82,000	$ 0	$ 0

Regulatory restrictions on ne_2

Regulatory restrictions on net assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Jan. 01, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Regulatory restrictions on net assets
Common stock equity	$ 2,337,502	$ 2,280,260	$ 2,280,260	$ 2,162,280	$ 2,097,386
Hawaiian Electric Company, Inc. and Subsidiaries
Regulatory restrictions on net assets
Restrictions on transfer of net assets to the parent in the form of cash dividends, loans and advances	$ 859,000
Hawaiian Electric Company, Inc. and Subsidiaries
Regulatory restrictions on net assets
Distribution restrictions, percent of earnings in current year and 5 preceding years if capitalization rate is less than 35%	80.00%
Total capitalization rate of HEI's electric utility subsidiaries	57.00%
Common stock equity	$ 2,141,918		2,047,352	$ 1,957,641	$ 1,845,283
American Savings Bank (ASB)
Regulatory restrictions on net assets
Common stock equity	736,175		$ 699,051
Restrictions on transfer of net assets to the parent in the form of cash dividends, loans and advances	$ 405,000

Significant group concentrati_2

Significant group concentrations of credit risk (Details)	12 Months Ended
	Dec. 31, 2020
Major customers
Percentage of benchmark loan to appraisal ratio in excess of which mortgage insurance is required	80.00%
Percentage of workforce covered by collective bargaining arrangement	50.00%
American Savings Bank (ASB)
Major customers
Percentage of benchmark loan to appraisal ratio in excess of which mortgage insurance is required	80.00%

Fair value measurements - Fair

Fair value measurements - Fair Value Hierarchy of Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Financial assets
Available-for-sale investment securities	$ 1,970,417	$ 1,232,826
Held-to-maturity investment securities	229,963	143,467
Financial liabilities
Short-term borrowings—other than bank	129,379	185,710
Other bank borrowings	89,670	115,110
Carrying or notional amount
Financial assets
Available-for-sale investment securities	1,970,417	1,232,826
Held-to-maturity investment securities	226,947	139,451
Stock in Federal Home Loan Bank	8,680	8,434
Loans, net	5,260,917	5,080,107
Mortgage servicing rights	10,020	9,101
Derivative assets	120,980	25,179
Financial liabilities
Deposit liabilities	548,830	769,825
Short-term borrowings—other than bank	129,379	185,710
Other bank borrowings	89,670	115,110
Long-term debt, net	2,119,129	1,964,365
Derivative liabilities	137,500	51,375
Carrying or notional amount | Hawaiian Electric Company, Inc. and Subsidiaries
Financial liabilities
Short-term borrowings	49,979	88,987
Long-term debt, net	1,561,302	1,497,667
Estimated fair value
Financial assets
Available-for-sale investment securities	1,970,417	1,232,826
Held-to-maturity investment securities	229,963	143,467
Stock in Federal Home Loan Bank	8,680	8,434
Loans, net	5,439,330	5,157,537
Mortgage servicing rights	10,705	12,379
Derivative assets	4,536	300
Financial liabilities
Deposit liabilities	552,800	765,976
Short-term borrowings—other than bank	129,379	185,710
Other bank borrowings	89,669	115,107
Long-term debt, net	2,487,790	2,156,927
Derivative liabilities	5,030	2,218
Estimated fair value | Hawaiian Electric Company, Inc. and Subsidiaries
Financial liabilities
Short-term borrowings	49,979	88,987
Long-term debt, net	1,890,490	1,670,189
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
Derivative liabilities	500	33
Estimated fair value | Level 1 | Hawaiian Electric Company, Inc. and Subsidiaries
Financial liabilities
Short-term borrowings	0	0
Long-term debt, net	0	0
Estimated fair value | Level 2
Financial assets
Available-for-sale investment securities	1,943,232	1,204,229
Held-to-maturity investment securities	229,963	143,467
Stock in Federal Home Loan Bank	8,680	8,434
Loans, net	28,354	12,295
Mortgage servicing rights		0
Derivative assets	4,536	300
Financial liabilities
Deposit liabilities	552,800	765,976
Short-term borrowings—other than bank	129,379	185,710
Other bank borrowings	89,669	115,107
Long-term debt, net	2,487,790	2,156,927
Derivative liabilities	4,530	2,185
Estimated fair value | Level 2 | Hawaiian Electric Company, Inc. and Subsidiaries
Financial liabilities
Short-term borrowings	49,979	88,987
Long-term debt, net	1,890,490	1,670,189
Estimated fair value | Level 3
Financial assets
Available-for-sale investment securities	27,185	28,597
Held-to-maturity investment securities	0	0
Stock in Federal Home Loan Bank	0	0
Loans, net	5,410,976	5,145,242
Mortgage servicing rights	10,705	12,379
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
Derivative liabilities	0	0
Estimated fair value | Level 3 | Hawaiian Electric Company, Inc. and Subsidiaries
Financial liabilities
Short-term borrowings	0	0
Long-term debt, net	$ 0	$ 0

Fair value measurements - Fai_2

Fair value measurements - Fair Value Measurements on a Recurring Basis (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020USD ($)instrument	Dec. 31, 2019USD ($)
Fair value measurements on a recurring and nonrecurring basis
Available-for-sale, at fair value	$ 1,970,417	$ 1,232,826
Discount rate
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Mortgage revenue bonds, measurement input	0.0213
Mortgage revenue bonds
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, January 1	$ 28,597	23,636
Principal payments received	(1,641)	0
Purchases	229	4,961
Unrealized gain (loss) included in other comprehensive income	0	0
Balance, December 31	$ 27,185	28,597
Mortgage revenue bonds | Bank
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Number of mortgage revenue bonds held | instrument	2
Fair value measurements on a recurring basis | Level 1
Fair value measurements on a recurring and nonrecurring basis
Derivative assets	$ 0	0
Derivative liabilities	500	33
Fair value measurements on a recurring basis | Level 1 | Bank
Fair value measurements on a recurring and nonrecurring basis
Available-for-sale, at fair value	0	0
Fair value measurements on a recurring basis | Level 1 | Bank | Interest Rate Lock Commitments
Fair value measurements on a recurring and nonrecurring basis
Derivative assets	0	0
Fair value measurements on a recurring basis | Level 1 | Bank | Forward commitments
Fair value measurements on a recurring and nonrecurring basis
Derivative assets	0	0
Derivative liabilities	500	33
Fair value measurements on a recurring basis | Level 1 | Bank | Mortgage-backed securities — issued or guaranteed by U.S. Government agencies or sponsored agencies
Fair value measurements on a recurring and nonrecurring basis
Available-for-sale, at fair value	0	0
Fair value measurements on a recurring basis | Level 1 | Bank | U.S. Treasury and federal agency obligations
Fair value measurements on a recurring and nonrecurring basis
Available-for-sale, at fair value	0	0
Fair value measurements on a recurring basis | Level 1 | Bank | Corporate bonds
Fair value measurements on a recurring and nonrecurring basis
Available-for-sale, at fair value	0	0
Fair value measurements on a recurring basis | Level 1 | Bank | Mortgage revenue bonds
Fair value measurements on a recurring and nonrecurring basis
Available-for-sale, at fair value	0	0
Fair value measurements on a recurring basis | Level 1 | Other | Interest rate swap
Fair value measurements on a recurring and nonrecurring basis
Derivative liabilities	0	0
Fair value measurements on a recurring basis | Level 2
Fair value measurements on a recurring and nonrecurring basis
Derivative assets	4,536	300
Derivative liabilities	4,530	2,185
Fair value measurements on a recurring basis | Level 2 | Bank
Fair value measurements on a recurring and nonrecurring basis
Available-for-sale, at fair value	1,943,232	1,204,229
Fair value measurements on a recurring basis | Level 2 | Bank | Interest Rate Lock Commitments
Fair value measurements on a recurring and nonrecurring basis
Derivative assets	4,536	297
Fair value measurements on a recurring basis | Level 2 | Bank | Forward commitments
Fair value measurements on a recurring and nonrecurring basis
Derivative assets	0	3
Derivative liabilities	0	12
Fair value measurements on a recurring basis | Level 2 | Bank | Mortgage-backed securities — issued or guaranteed by U.S. Government agencies or sponsored agencies
Fair value measurements on a recurring and nonrecurring basis
Available-for-sale, at fair value	1,849,559	1,026,385
Fair value measurements on a recurring basis | Level 2 | Bank | U.S. Treasury and federal agency obligations
Fair value measurements on a recurring and nonrecurring basis
Available-for-sale, at fair value	62,322	117,787
Fair value measurements on a recurring basis | Level 2 | Bank | Corporate bonds
Fair value measurements on a recurring and nonrecurring basis
Available-for-sale, at fair value	31,351	60,057
Fair value measurements on a recurring basis | Level 2 | Bank | Mortgage revenue bonds
Fair value measurements on a recurring and nonrecurring basis
Available-for-sale, at fair value	0	0
Fair value measurements on a recurring basis | Level 2 | Other | Interest rate swap
Fair value measurements on a recurring and nonrecurring basis
Derivative liabilities	4,530	2,173
Fair value measurements on a recurring basis | Level 3
Fair value measurements on a recurring and nonrecurring basis
Derivative assets	0	0
Derivative liabilities	0	0
Fair value measurements on a recurring basis | Level 3 | Bank
Fair value measurements on a recurring and nonrecurring basis
Available-for-sale, at fair value	27,185	28,597
Fair value measurements on a recurring basis | Level 3 | Bank | Interest Rate Lock Commitments
Fair value measurements on a recurring and nonrecurring basis
Derivative assets	0	0
Fair value measurements on a recurring basis | Level 3 | Bank | Forward commitments
Fair value measurements on a recurring and nonrecurring basis
Derivative assets	0	0
Derivative liabilities	0	0
Fair value measurements on a recurring basis | Level 3 | Bank | Mortgage-backed securities — issued or guaranteed by U.S. Government agencies or sponsored agencies
Fair value measurements on a recurring and nonrecurring basis
Available-for-sale, at fair value	0	0
Fair value measurements on a recurring basis | Level 3 | Bank | U.S. Treasury and federal agency obligations
Fair value measurements on a recurring and nonrecurring basis
Available-for-sale, at fair value	0	0
Fair value measurements on a recurring basis | Level 3 | Bank | Corporate bonds
Fair value measurements on a recurring and nonrecurring basis
Available-for-sale, at fair value	0	0
Fair value measurements on a recurring basis | Level 3 | Bank | Mortgage revenue bonds
Fair value measurements on a recurring and nonrecurring basis
Available-for-sale, at fair value	27,185	28,597
Fair value measurements on a recurring basis | Level 3 | Other | Interest rate swap
Fair value measurements on a recurring and nonrecurring basis
Derivative liabilities	$ 0	$ 0

Fair value measurements - Fai_3

Fair value measurements - Fair Value Measurements on a Nonrecurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Estimated fair value
Fair value measurements on a recurring and nonrecurring basis
Loans	$ 5,439,330	$ 5,157,537
Level 1 | Estimated fair value
Fair value measurements on a recurring and nonrecurring basis
Loans	0	0
Level 2 | Estimated fair value
Fair value measurements on a recurring and nonrecurring basis
Loans	28,354	12,295
Level 3 | Estimated fair value
Fair value measurements on a recurring and nonrecurring basis
Loans	5,410,976	5,145,242
Fair value measurements on a nonrecurring basis
Fair value measurements on a recurring and nonrecurring basis
Loans	387	25
Fair value measurements on a nonrecurring basis | Estimated fair value
Fair value measurements on a recurring and nonrecurring basis
Mortgage servicing rights	3,001
Fair value measurements on a nonrecurring basis | Level 1
Fair value measurements on a recurring and nonrecurring basis
Loans	0	0
Mortgage servicing rights	0
Fair value measurements on a nonrecurring basis | Level 2
Fair value measurements on a recurring and nonrecurring basis
Loans	0	0
Mortgage servicing rights	0
Fair value measurements on a nonrecurring basis | Level 3
Fair value measurements on a recurring and nonrecurring basis
Loans	387	$ 25
Mortgage servicing rights	$ 3,001

Fair value measurements - Quant

Fair value measurements - Quantitative Information About Level 3 Fair Value Measurements (Details) - Level 3 - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Minimum
Fair value measurements
Significant unobservable input value, prepayment speed	15.00%
Maximum
Fair value measurements
Significant unobservable input value, prepayment speed	22.00%
Weighted Average
Fair value measurements
Significant unobservable input value, prepayment speed	22.00%
Significant unobservable input value, discount rate	9.30%
Discounted cash flow
Fair value measurements
Mortgage servicing rights	$ 3,001
Commercial | Fair value of collateral
Fair value measurements
Fair value	$ 387
Residential land | Fair value of collateral
Fair value measurements
Fair value		$ 25

Quarterly information (unaudi_3

Quarterly information (unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Condensed Financial Statements, Captions [Line Items]
Revenues	$ 652,217	$ 641,427	$ 608,945	$ 677,186	$ 725,966	$ 770,882	$ 715,485	$ 661,615	$ 2,579,775	$ 2,873,948	$ 2,860,849
Operating income	80,674	99,561	71,556	59,702	100,795	96,655	72,634	77,937	311,493	348,021	333,356
Net income	50,958	65,503	49,360	33,893	66,736	63,890	42,985	46,161	199,714	219,772	203,664
Net income for common stock	$ 50,485	$ 65,032	$ 48,887	$ 33,420	$ 66,263	$ 63,419	$ 42,512	$ 45,688	$ 197,824	$ 217,882	$ 201,774
Basic earnings per common share (in dollars per share)	$ 0.46	$ 0.60	$ 0.45	$ 0.31	$ 0.61	$ 0.58	$ 0.39	$ 0.42	$ 1.81	$ 2	$ 1.85
Diluted earnings per common share (in dollars per share)	0.46	0.59	0.45	0.31	0.61	0.58	0.39	0.42	1.81	1.99	1.85
Dividends declared per common share (in dollars per share)	$ 0.33	$ 0.33	$ 0.33	$ 0.33	$ 0.32	$ 0.32	$ 0.32	$ 0.32	$ 1.32	$ 1.28	$ 1.24
Hawaiian Electric Company, Inc. and Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Revenues	$ 571,095	$ 562,568	$ 534,215	$ 597,442	$ 645,333	$ 688,330	$ 633,784	$ 578,495	$ 2,265,320	$ 2,545,942	$ 2,546,525
Operating income	68,273	88,518	67,801	43,958	70,331	71,793	55,694	56,560	268,550	254,378	241,661
Net income	43,540	60,563	42,828	24,404	45,860	47,277	33,073	32,625	171,335	158,835	145,648
Net income for common stock	$ 43,041	$ 60,065	$ 42,329	$ 23,905	45,361	$ 46,779	$ 32,574	$ 32,126	$ 169,340	$ 156,840	$ 143,653
ASB Hawaii, Inc.
Condensed Financial Statements, Captions [Line Items]
Gain on sale of properties					10,800
Gain on sale of properties included in net income					$ 7,900
Gain on the sale of properties, earnings per share basic and diluted (in dollars per share)					$ 0.07
Statutory income tax rate					26.80%

SCHEDULE I - CONDENSED FINANC_2

SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF REGISTRANT - BALANCE SHEETS (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Jan. 01, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Assets
Cash and cash equivalents	$ 341,421		$ 196,813
Accounts receivable	281,216		300,794
Property, plant and equipment, net	5,265,735		5,109,628
Other assets and intercompany receivables	629,149		649,885
Total assets	15,004,007	$ 13,745,251	13,745,251	$ 13,104,051
Liabilities
Accounts payable	182,347		220,633
Long-term debt, net	2,119,129		1,964,365
Other	618,438	583,545	583,545
Total liabilities	12,632,212	11,430,698	11,430,698
Shareholders’ equity
Preferred stock, no par value, authorized 10,000,000 shares; issued: none	0		0
Common stock equity	1,678,368		1,678,257
Retained earnings	660,398	622,042	622,042
Accumulated other comprehensive loss, net of tax benefits	(1,264)		(20,039)
Total shareholders’ equity	2,337,502	2,280,260	2,280,260	$ 2,162,280	$ 2,097,386
Total capitalization and liabilities	$ 15,004,007	$ 13,745,251	$ 13,745,251
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)	109,181,124		108,973,328
Common stock, outstanding shares (in shares)	109,181,124		108,973,328
2021	$ 55,000
Hawaiian Electric (parent only)
Assets
Cash and cash equivalents	299		$ 953
Accounts receivable	738		779
Notes receivable from subsidiaries	0		22,598
Property, plant and equipment, net	2,456		2,931
Deferred income tax assets	14,236		10,754
Other assets and intercompany receivables	18,726		21,770
Investments in subsidiaries, at equity	2,893,781		2,761,802
Total assets	2,930,236		2,821,587
Liabilities
Accounts payable	673		1,509
Interest payable	2,918		3,041
Commercial paper	64,491		96,723
Short-term borrowings from non-affiliate	14,909		0
Long-term debt, net	449,145		399,064
Retirement benefits liability	31,688		29,367
Other	28,910		11,623
Total liabilities	592,734		541,327
Shareholders’ equity
Preferred stock, no par value, authorized 10,000,000 shares; issued: none	0		0
Common stock equity	1,678,368		1,678,257
Retained earnings	660,398		622,042
Accumulated other comprehensive loss, net of tax benefits	(1,264)		(20,039)
Total shareholders’ equity	2,337,502		2,280,260
Total capitalization and liabilities	$ 2,930,236		$ 2,821,587
Preferred stock, authorized shares (in shares)	10,000,000		10,000,000
Common stock, authorized shares (in shares)	200,000,000		200,000,000
Common stock, issued shares (in shares)	109,181,124		108,973,328
Common stock, outstanding shares (in shares)	109,181,124		108,973,328
2021	$ 50,000

SCHEDULE I - CONDENSED FINANC_3

SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF REGISTRANT - STATEMENTS OF INCOME (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenues
Revenues									$ 2,269,451	$ 2,622,025
Expenses:
Depreciation of property, plant and equipment									238,114	229,858	$ 214,036
Total expenses									2,268,282	2,525,927	2,527,493
Retirement defined benefits expense—other than service costs									3,210	2,806	5,962
Interest expense									99,808	109,339	104,216
Income before income taxes									240,624	271,409	254,461
Income tax benefits									(40,910)	(51,637)	(50,797)
Net income (loss)	$ 50,958	$ 65,503	$ 49,360	$ 33,893	$ 66,736	$ 63,890	$ 42,985	$ 46,161	199,714	219,772	203,664
Hawaiian Electric (parent only)
Revenues
Revenues									208	777	429
Equity in net income of subsidiaries									227,098	246,005	226,972
Expenses:
Operating, administrative and general									20,731	19,195	19,515
Depreciation of property, plant and equipment									485	570	597
Taxes, other than income taxes									654	570	509
Total expenses									21,870	20,335	20,621
Income before interest expense and income tax benefits									205,436	226,447	206,780
Retirement defined benefits expense—other than service costs									634	442	674
Interest expense									18,237	17,930	12,664
Income before income taxes									186,565	208,075	193,442
Income tax benefits									11,259	9,807	8,332
Net income (loss)									$ 197,824	$ 217,882	$ 201,774

SCHEDULE I - CONDENSED FINANC_4

SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF REGISTRANT - STATEMENTS OF CASH FLOWS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash flows from operating activities
Net cash provided by operating activities	$ 429,407	$ 512,470	$ 499,312
Cash flows from investing activities
Capital expenditures	(383,895)	(457,520)	(537,369)
Other, net	3,412	13,291	14,061
Net cash used in investing activities	(1,413,648)	(541,709)	(792,059)
Cash flows from financing activities
Net increase (decrease) in short-term borrowings with original maturities of three months or less	(71,219)	86,718	(18,999)
Proceeds from issuance of short-term debt	165,000	75,000	25,000
Repayment of short-term debt	(150,000)	(50,000)	(50,000)
Proceeds from issuance of long-term debt	415,997	289,349	250,000
Repayment of long-term debt and funds transferred for repayment of long-term debt	(178,969)	(287,285)	(53,887)
Common stock dividends	(144,096)	(139,463)	(134,987)
Other	(3,203)	(1,836)	(1,603)
Net cash used in financing activities	1,115,535	87,716	200,074
Net decrease in cash and equivalents	131,294	58,477	(92,673)
Cash, cash equivalents and restricted cash, January 1	227,685	169,208	261,881
Cash, cash equivalents and restricted cash, December 31	358,979	227,685	169,208
Hawaiian Electric (parent only)
Cash flows from operating activities
Net cash provided by operating activities	134,363	131,120	135,470
Cash flows from investing activities
Increase in note receivable from subsidiary	0	(1,187)	(20,596)
Decrease in note receivable from subsidiary	22,719	0	0
Capital expenditures	(20)	(47)	(143)
Investments in subsidiaries	(42,664)	(38,935)	(71,970)
Other, net	2,435	(1,001)	140
Net cash used in investing activities	(17,530)	(41,170)	(92,569)
Cash flows from financing activities
Net decrease in notes payable to subsidiaries with original maturities of three months or less	0	0	(30)
Net increase (decrease) in short-term borrowings with original maturities of three months or less	(32,232)	47,731	(14,000)
Proceeds from issuance of short-term debt	65,000	0	0
Repayment of short-term debt	(50,000)	0	(50,000)
Proceeds from issuance of long-term debt	50,000	0	150,000
Proceeds from issuance of syndicated credit facility	66,300	0	0
Repayment of syndicated credit facility	(66,300)	0	0
Withheld shares for employee taxes on vested share-based compensation	(5,700)	(997)	(996)
Common stock dividends	(144,096)	(139,463)	(134,987)
Other	(459)	(10)	(848)
Net cash used in financing activities	(117,487)	(92,739)	(50,861)
Net decrease in cash and equivalents	(654)	(2,789)	(7,960)
Cash, cash equivalents and restricted cash, January 1	953	3,742	11,702
Cash, cash equivalents and restricted cash, December 31	$ 299	$ 953	$ 3,742

SCHEDULE I - CONDENSED FINANC_5

SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF REGISTRANT - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Condensed Financial Statements, Captions [Line Items]
Less unamortized debt issuance costs	$ (2,249)	$ (2,350)
Long-term debt, net—other than bank	2,119,129	1,964,365
Aggregate principal payments, fiscal year maturity:
2021	55,000
2022	241,000
2023	162,000
2024	6,000
2025	103,000
Hawaiian Electric (parent only)
Condensed Financial Statements, Captions [Line Items]
Less unamortized debt issuance costs	(855)	(936)
Long-term debt, net—other than bank	449,145	399,064
Aggregate principal payments, fiscal year maturity:
2021	50,000
2022	150,000
2023	50,000
2024	0
2025	50,000
Thereafter	150,000
Cash dividends paid	145,000	157,000	$ 154,000
Hawaiian Electric (parent only) | ASB Hawaii, Inc. | Consolidated subsidiary
Aggregate principal payments, fiscal year maturity:
Accounts receivable reduction	2,300	2,300	2,300
HEI notes payable increase to ASHI	2,300	2,300	$ 2,300
Hawaiian Electric (parent only) | Self Insured United States Longshore and Horbor Bond
Aggregate principal payments, fiscal year maturity:
Maximum undiscounted exposure	600
Hawaiian Electric (parent only) | Self Insured Automobile Bond
Aggregate principal payments, fiscal year maturity:
Maximum undiscounted exposure	700
Hawaiian Electric (parent only) | HEI loan 2.99%, due 2022
Condensed Financial Statements, Captions [Line Items]
Gross long-term debt	$ 150,000	150,000
Debt instrument, stated interest rate	2.99%
Hawaiian Electric (parent only) | HEI 5.67% senior notes, due 2021
Condensed Financial Statements, Captions [Line Items]
Gross long-term debt	$ 50,000	50,000
Debt instrument, stated interest rate	5.67%
Hawaiian Electric (parent only) | HEI 3.99% senior notes, due 2023
Condensed Financial Statements, Captions [Line Items]
Gross long-term debt	$ 50,000	50,000
Debt instrument, stated interest rate	3.99%
Hawaiian Electric (parent only) | HEI 4.58% senior notes, due 2025
Condensed Financial Statements, Captions [Line Items]
Gross long-term debt	$ 50,000	50,000
Debt instrument, stated interest rate	4.58%
Hawaiian Electric (parent only) | HEI 4.72% senior notes, due 2028
Condensed Financial Statements, Captions [Line Items]
Gross long-term debt	$ 100,000	100,000
Debt instrument, stated interest rate	4.72%
Hawaiian Electric (parent only) | Senior Notes 2.98 Percent Due 2030
Condensed Financial Statements, Captions [Line Items]
Gross long-term debt	$ 50,000	$ 0
Debt instrument, stated interest rate	2.98%

SCHEDULE II - VALUATION AND Q_2

SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jan. 01, 2020
Valuation and qualifying accounts
Bad debt expenses deferred to regulatory assets	$ 16,700
Total liabilities and shareholders’ equity	(15,004,007)	$ (13,745,251)			$ (13,745,251)
Reclassifications of allowance from one customer account into long term assets			$ (4,934)	$ (4,934)
Impact of ASU No. 2016-13
Valuation and qualifying accounts
Total liabilities and shareholders’ equity					$ 19,441
Hawaiian Electric Company, Inc. and Subsidiaries
Valuation and qualifying accounts
Total liabilities and shareholders’ equity	(6,457,373)	(6,388,682)
Bank
Valuation and qualifying accounts
Total liabilities and shareholders’ equity	(8,396,533)	(7,233,017)
Allowance for uncollectible accounts – electric utility | Hawaiian Electric Company, Inc. and Subsidiaries
Valuation and qualifying accounts
Balance at beginning of period	1,377	1,480	1,178
Charged to costs and expenses	2,100	2,106	2,474
Charged to other accounts	18,041	795	(4,099)
Deductions	3,709	3,004	(1,927)
Balance at end of period	17,809	1,377	1,480	1,178
Allowance for credit losses for loans – bank | Bank
Valuation and qualifying accounts
Balance at beginning of period	72,796	52,119	53,637
Charged to costs and expenses	49,811	23,480	14,745
Charged to other accounts	4,748	6,418	4,254
Deductions	26,154	28,662	20,517
Balance at end of period	101,201	72,796	52,119	53,637
Allowance for credit losses for loans – bank | Bank | Previously Reported
Valuation and qualifying accounts
Balance at beginning of period	$ 53,355
Balance at end of period		53,355
Deferred tax valuation allowance – HEI
Valuation and qualifying accounts
Balance at beginning of period		$ 0	38
Charged to costs and expenses			0
Charged to other accounts			0
Deductions			38
Balance at end of period			$ 0	$ 38