Condensed Consolidated Balance Sheets (unaudited) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Assets
Cash and cash equivalents	$ 277,579	$ 341,421
Restricted cash	14,067	17,558
Accounts receivable and unbilled revenues, net	273,197	281,216
Available-for-sale investment securities, at fair value	2,305,257	1,970,417
Held-to-maturity investment securities, at amortized cost	295,046	226,947
Stock in Federal Home Loan Bank, at cost	10,000	8,680
Loans held for investment, net	5,218,288	5,232,642
Loans held for sale, at lower of cost or fair value	23,637	28,275
Property, plant and equipment, net of accumulated depreciation	5,283,768	5,265,735
Regulatory assets	773,426	766,708
Other	639,505	629,149
Goodwill	82,190	82,190
Utility property, plant and equipment
Total property, plant and equipment, net	5,283,768	5,265,735
Current assets
Cash and cash equivalents	277,579	341,421
Other long-term assets
Operating lease right-of-use assets	162,713	153,069
Total assets	15,358,673	15,004,007
Liabilities
Accounts payable	164,936	182,347
Interest and dividends payable	32,405	23,547
Deposit liabilities	7,745,294	7,386,957
Short-term borrowings—other than bank	100,242	129,379
Other bank borrowings	102,685	89,670
Long-term debt, net—other than bank	2,229,738	2,119,129
Deferred income taxes	380,365	395,089
Operating lease liabilities	175,334	160,432
Regulatory liabilities	956,139	959,786
Defined benefit pension and other postretirement benefit plans liability	558,191	567,438
Other	557,758	618,438
Total liabilities	13,003,087	12,632,212
Capitalization
Retained earnings	687,600	660,398
Accumulated other comprehensive loss, net of tax benefits	(45,280)	(1,264)
Total shareholders’ equity	2,321,293	2,337,502
Preferred stock of subsidiaries - not subject to mandatory redemption	34,293	34,293
Commitments and contingencies
Current liabilities
Interest and dividends payable	32,405	23,547
Deferred credits and other liabilities
Deferred income taxes	380,365	395,089
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: 109,281,493 shares and 109,181,124 shares at March 31, 2021 and December 31, 2020, respectively	1,678,973	1,678,368
Retained earnings	687,600	660,398
Accumulated other comprehensive loss, net of tax benefits	(45,280)	(1,264)
Total shareholders’ equity	2,321,293	2,337,502
Total liabilities and shareholders’ equity	15,358,673	15,004,007
Hawaiian Electric Company, Inc. and Subsidiaries
Assets
Cash and cash equivalents	51,743	47,360
Restricted cash	11,506	15,966
Property, plant and equipment, net of accumulated depreciation	4,954,711	4,937,170
Regulatory assets	22,200
Utility property, plant and equipment
Land	51,611	51,611
Plant and equipment	7,551,879	7,509,343
Less accumulated depreciation	(2,859,719)	(2,819,079)
Construction in progress	203,988	188,342
Utility property, plant and equipment, net	4,947,759	4,930,217
Nonutility property, plant and equipment, less accumulated depreciation	6,952	6,953
Total property, plant and equipment, net	4,954,711	4,937,170
Current assets
Cash and cash equivalents	51,743	47,360
Customer accounts receivable, net	141,649	147,832
Accrued unbilled revenues, net	101,813	101,036
Other accounts receivable, net	5,073	7,673
Fuel oil stock, at average cost	74,688	58,238
Materials and supplies, at average cost	69,726	67,344
Prepayments and other	36,419	44,083
Regulatory assets	54,322	30,435
Total current assets	546,939	519,967
Other long-term assets
Operating lease right-of-use assets	138,534	127,654
Regulatory assets	719,104	736,273
Other	135,620	136,309
Total other long-term assets	993,258	1,000,236
Total assets	6,494,908	6,457,373
Liabilities
Interest and dividends payable	28,172	20,350
Deferred income taxes	396,758	397,798
Capitalization
Common stock ($6 2/3 par value, authorized 50,000,000 shares; outstanding 17,324,376 shares at March 31, 2021 and December 31, 2020)	115,515	115,515
Premium on capital stock	746,987	746,987
Retained earnings	1,297,768	1,282,335
Accumulated other comprehensive loss, net of tax benefits	(2,885)	(2,919)
Total shareholders’ equity	2,157,385	2,141,918
Long-term debt, net	1,675,863	1,561,302
Total capitalization	3,867,541	3,737,513
Preferred stock of subsidiaries - not subject to mandatory redemption	34,293	34,293
Commitments and contingencies
Current liabilities
Current portion of operating lease liabilities	66,301	64,730
Short-term borrowings from non-affiliates	0	49,979
Accounts payable	123,199	133,849
Interest and dividends payable	28,172	20,350
Taxes accrued, including revenue taxes	155,125	192,524
Regulatory liabilities	30,370	37,301
Other	70,000	74,262
Total current liabilities	473,167	572,995
Deferred credits and other liabilities
Operating lease liabilities	84,102	69,494
Deferred income taxes	396,758	397,798
Regulatory liabilities	925,769	922,485
Unamortized tax credits	110,181	111,915
Defined benefit pension and other postretirement benefit plans liability	522,286	530,532
Other	115,104	114,641
Total deferred credits and other liabilities	2,154,200	2,146,865
Shareholders’ equity
Preferred stock, no par value, authorized 10,000,000 shares; issued: none	34,293	34,293
Retained earnings	1,297,768	1,282,335
Accumulated other comprehensive loss, net of tax benefits	(2,885)	(2,919)
Total shareholders’ equity	2,157,385	2,141,918
Total liabilities and shareholders’ equity	$ 6,494,908	$ 6,457,373