Condensed Consolidated Statements of Income (unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Revenues
Total revenues	$ 680,257	$ 608,945	$ 1,323,203	$ 1,286,131
Expenses
Total expenses	578,401	537,389	1,123,316	1,154,873
Operating income (loss)
Total operating income	101,856	71,556	199,887	131,258
Retirement defined benefits credit (expense)—other than service costs	1,216	(934)	3,651	(1,868)
Interest expense, net—other than on deposit liabilities and other bank borrowings	(23,317)	(22,613)	(47,053)	(44,388)
Allowance for borrowed funds used during construction	812	752	1,559	1,440
Allowance for equity funds used during construction	2,377	2,194	4,568	4,209
Gain on sale of investment securities, net	0	9,275	528	9,275
Income before income taxes	82,944	60,230	163,140	99,926
Income taxes	18,599	10,870	33,964	16,673
Net income	64,345	49,360	129,176	83,253
Preferred stock dividends of subsidiaries	473	473	946	946
Net income for common stock	$ 63,872	$ 48,887	$ 128,230	$ 82,307
Basic earnings per common share (in dollars per share)	$ 0.58	$ 0.45	$ 1.17	$ 0.75
Diluted earnings per common share (in dollars per share)	$ 0.58	$ 0.45	$ 1.17	$ 0.75
Weighted-average number of common shares outstanding (in shares)	109,282	109,146	109,252	109,098
Net effect of potentially dilutive shares (in shares)	233	159	305	276
Weighted-average shares assuming dilution (in shares)	109,515	109,305	109,557	109,374
Electric utility
Revenues
Total revenues	$ 601,879	$ 534,215	$ 1,166,743	$ 1,131,657
Expenses
Total expenses	534,195	466,414	1,029,945	1,019,898
Operating income (loss)
Total operating income	67,684	67,801	136,798	111,759
Income before income taxes	53,898	53,027	108,988	82,713
Income taxes	11,498	10,199	22,731	15,481
Net income	42,400	42,828	86,257	67,232
Preferred stock dividends of subsidiaries	499	499	998	998
Net income for common stock	41,901	42,329	85,259	66,234
Bank
Revenues
Total revenues	77,260	74,714	154,391	154,452
Expenses
Total expenses	37,454	66,221	79,289	126,556
Operating income (loss)
Total operating income	39,806	8,493	75,102	27,896
Income before income taxes	39,992	17,334	77,094	36,303
Income taxes	9,708	3,320	17,254	6,528
Net income	30,284	14,014	59,840	29,775
Preferred stock dividends of subsidiaries	0	0	0	0
Net income for common stock	30,284	14,014	59,840	29,775
Other
Revenues
Total revenues	1,118	16	2,069	22
Expenses
Total expenses	6,752	4,754	14,082	8,419
Operating income (loss)
Total operating income	(5,634)	(4,738)	(12,013)	(8,397)
Income before income taxes	(10,946)	(10,131)	(22,942)	(19,090)
Income taxes	(2,607)	(2,649)	(6,021)	(5,336)
Net income	(8,339)	(7,482)	(16,921)	(13,754)
Preferred stock dividends of subsidiaries	(26)	(26)	(52)	(52)
Net income for common stock	(8,313)	(7,456)	(16,869)	(13,702)
Hawaiian Electric Company, Inc. and Subsidiaries
Revenues
Total revenues	601,879	534,215	1,166,743	1,131,657
Expenses
Fuel oil	139,136	112,451	266,563	285,672
Purchased power	162,465	136,838	304,761	276,654
Other operation and maintenance	118,142	110,041	232,712	237,588
Depreciation	57,381	55,696	114,736	111,546
Taxes, other than income taxes	57,071	51,388	111,173	108,438
Total expenses	534,195	466,414	1,029,945	1,019,898
Operating income (loss)
Total operating income	67,684	67,801	136,798	111,759
Retirement defined benefits credit (expense)—other than service costs	1,020	(382)	2,041	(763)
Interest expense and other charges, net	(17,995)	(17,338)	(35,978)	(33,932)
Allowance for borrowed funds used during construction	812	752	1,559	1,440
Allowance for equity funds used during construction	2,377	2,194	4,568	4,209
Income before income taxes	53,898	53,027	108,988	82,713
Income taxes	11,498	10,199	22,731	15,481
Net income	42,400	42,828	86,257	67,232
Preferred stock dividends of subsidiaries	229	229	458	458
Net income attributable to Hawaiian Electric	42,171	42,599	85,799	66,774
Preferred stock dividends of Hawaiian Electric	270	270	540	540
Net income for common stock	$ 41,901	$ 42,329	$ 85,259	$ 66,234