Condensed Consolidated Statements of Income (unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenues
Total revenues	$ 685,277	$ 632,281	$ 1,331,151	$ 1,223,843
Expenses
Purchased power	161,000	153,000	301,000	280,000
Total expenses	606,478	554,479	1,180,463	1,076,303
Operating income (loss)
Total operating income	78,799	77,802	150,688	147,540
Less: Retirement defined benefits expense—other than service costs	(1,564)	(1,906)	(3,397)	(3,782)
Interest expense, net—other than on deposit liabilities and other bank borrowings	(22,001)	(20,440)	(43,519)	(40,008)
Allowance for borrowed funds used during construction	1,365	1,143	2,809	2,032
Allowance for equity funds used during construction	2,983	3,027	6,277	5,426
Income before income taxes	59,582	59,626	112,858	111,208
Income taxes	13,055	20,492	25,611	37,408
Net income	46,527	39,134	87,247	73,800
Preferred stock dividends of subsidiaries	473	473	946	946
Net income for common stock	$ 46,054	$ 38,661	$ 86,301	$ 72,854
Basic earnings per common share (in dollars per share)	$ 0.42	$ 0.36	$ 0.79	$ 0.67
Diluted earnings per common share (in dollars per share)	0.42	0.36	0.79	0.67
Dividends declared per common share (in dollars per share)	$ 0.31	$ 0.31	$ 0.62	$ 0.62
Weighted-average number of common shares outstanding (in shares)	108,842	108,750	108,830	108,712
Net effect of potentially dilutive shares (in shares)	121	47	223	157
Weighted-average shares assuming dilution (in shares)	108,963	108,797	109,053	108,869
Hawaiian Electric Company, Inc. and Subsidiaries
Revenues
Total revenues	$ 608,126	$ 556,875	$ 1,178,553	$ 1,075,486
Expenses
Fuel oil	171,717	141,259	338,685	285,529
Purchased power	160,738	153,067	300,648	280,191
Other operation and maintenance	112,642	104,939	220,252	203,756
Depreciation	50,361	48,156	100,827	96,372
Taxes, other than income taxes	57,524	52,972	111,628	102,795
Total expenses	552,982	500,393	1,072,040	968,643
Operating income (loss)
Total operating income	55,144	56,482	106,513	106,843
Less: Retirement defined benefits expense—other than service costs	(988)	(1,435)	(2,252)	(2,858)
Allowance for borrowed funds used during construction	1,365	1,143	2,809	2,032
Allowance for equity funds used during construction	2,983	3,027	6,277	5,426
Interest expense and other charges, net	(18,160)	(18,214)	(35,854)	(35,718)
Income before income taxes	40,344	41,003	77,493	75,725
Income taxes	8,676	14,860	17,851	27,618
Net income	31,668	26,143	59,642	48,107
Preferred stock dividends of subsidiaries	229	229	458	458
Net income attributable to Hawaiian Electric	31,439	25,914	59,184	47,649
Preferred stock dividends of Hawaiian Electric	270	270	540	540
Net income for common stock	31,169	25,644	58,644	47,109
Electric utility
Revenues
Total revenues	608,126	556,875	1,178,553	1,075,486
Expenses
Total expenses	552,982	500,393	1,072,040	968,643
Operating income (loss)
Total operating income	55,144	56,482	106,513	106,843
Income before income taxes	40,344	41,003	77,493	75,725
Income taxes	8,676	14,860	17,851	27,618
Net income	31,668	26,143	59,642	48,107
Preferred stock dividends of subsidiaries	499	499	998	998
Net income for common stock	31,169	25,644	58,644	47,109
Bank
Revenues
Total revenues	77,104	75,329	152,523	148,185
Expenses
Total expenses	50,187	50,332	100,719	98,833
Operating income (loss)
Total operating income	26,917	24,997	51,804	49,352
Income before income taxes	26,514	24,796	51,014	48,956
Income taxes	5,953	8,063	11,493	16,410
Net income	20,561	16,733	39,521	32,546
Preferred stock dividends of subsidiaries	0	0	0	0
Net income for common stock	20,561	16,733	39,521	32,546
Other
Revenues
Total revenues	47	77	75	172
Expenses
Total expenses	3,309	3,754	7,704	8,827
Operating income (loss)
Total operating income	(3,262)	(3,677)	(7,629)	(8,655)
Income before income taxes	(7,276)	(6,173)	(15,649)	(13,473)
Income taxes	(1,574)	(2,431)	(3,733)	(6,620)
Net income	(5,702)	(3,742)	(11,916)	(6,853)
Preferred stock dividends of subsidiaries	(26)	(26)	(52)	(52)
Net income for common stock	$ (5,676)	$ (3,716)	$ (11,864)	$ (6,801)