Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenues
Total revenues	$ 3,741,985	$ 2,850,379	$ 2,579,775
Expenses
Total expenses	3,360,912	2,464,313	2,268,282
Operating income (loss)
Operating income	381,073	386,066	311,493
Retirement defined benefits credit (expense)—other than service costs	4,411	5,848	(3,210)
Interest expense, net – other than on deposit liabilities and other bank borrowings	(103,402)	(94,363)	(88,694)
Allowance for borrowed funds used during construction	3,416	3,250	2,992
Allowance for equity funds used during construction	10,574	9,534	8,768
Gain on sales of investment securities, net and equity-method investment	8,123	528	9,275
Income before income taxes	304,195	310,863	240,624
Income taxes	61,167	62,807	40,910
Net income	243,028	248,056	199,714
Preferred stock dividends of Hawaiian Electric	1,890	1,890	1,890
Net income for common stock	$ 241,138	$ 246,166	$ 197,824
Basic earnings per common share (in dollars per share)	$ 2.20	$ 2.25	$ 1.81
Diluted earnings per common share (in dollars per share)	$ 2.20	$ 2.25	$ 1.81
Weighted-average number of common shares outstanding (in shares)	109,434	109,282	109,140
Net effect of potentially dilutive shares (share-based compensation programs) (in shares)	344	298	216
Weighted-average shares assuming dilution (in shares)	109,778	109,580	109,356
Electric utility
Revenues
Total revenues	$ 3,408,587	$ 2,539,636	$ 2,265,320
Expenses
Total expenses	3,109,396	2,260,078	1,996,770
Operating income (loss)
Operating income	299,191	279,558	268,550
Income before income taxes	240,600	223,785	211,753
Income taxes	49,676	44,148	40,418
Net income	190,924	179,637	171,335
Preferred stock dividends of Hawaiian Electric	1,995	1,995	1,995
Net income for common stock	188,929	177,642	169,340
Bank
Revenues
Total revenues	321,068	306,398	313,511
Expenses
Total expenses	219,550	178,195	251,702
Operating income (loss)
Operating income	101,518	128,203	61,809
Income before income taxes	102,241	130,559	69,271
Income taxes	22,252	29,325	11,688
Net income	79,989	101,234	57,583
Preferred stock dividends of Hawaiian Electric	0	0	0
Net income for common stock	79,989	101,234	57,583
Other
Revenues
Total revenues	12,330	4,345	944
Expenses
Total expenses	31,966	26,040	19,810
Operating income (loss)
Operating income	(19,636)	(21,695)	(18,866)
Income before income taxes	(38,646)	(43,481)	(40,400)
Income taxes	(10,761)	(10,666)	(11,196)
Net income	(27,885)	(32,815)	(29,204)
Preferred stock dividends of Hawaiian Electric	(105)	(105)	(105)
Net income for common stock	$ (27,780)	$ (32,710)	$ (29,099)