Condensed Consolidated Statements of Income (unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenues
Total revenues	$ 768,048	$ 673,185	$ 2,099,199	$ 1,897,028
Expenses
Purchased power	177,000	161,000	478,000	441,000
Total expenses	669,984	561,712	1,850,447	1,638,015
Operating income (loss)
Total operating income	98,064	111,473	248,752	259,013
Retirement defined benefits expense—other than service costs	(1,276)	(1,928)	(4,673)	(5,710)
Interest expense, net—other than on deposit liabilities and other bank borrowings	(22,523)	(19,227)	(66,042)	(59,235)
Allowance for borrowed funds used during construction	1,006	1,339	3,815	3,371
Allowance for equity funds used during construction	1,962	3,482	8,239	8,908
Income before income taxes	77,233	95,139	190,091	206,347
Income taxes	10,862	34,595	36,473	72,003
Net income	66,371	60,544	153,618	134,344
Preferred stock dividends of subsidiaries	471	471	1,417	1,417
Net income for common stock	$ 65,900	$ 60,073	$ 152,201	$ 132,927
Basic earnings per common share (in dollars per share)	$ 0.61	$ 0.55	$ 1.40	$ 1.22
Diluted earnings per common share (in dollars per share)	$ 0.60	$ 0.55	$ 1.40	$ 1.22
Weighted-average number of common shares outstanding (in shares)	108,879	108,786	108,847	108,737
Net effect of potentially dilutive shares (in shares)	176	79	243	172
Weighted-average shares assuming dilution (in shares)	109,055	108,865	109,090	108,909
Hawaiian Electric Company, Inc. and Subsidiaries
Revenues
Total revenues	$ 687,409	$ 598,769	$ 1,865,962	$ 1,674,255
Expenses
Fuel oil	206,551	146,258	545,236	431,787
Purchased power	177,590	160,347	478,238	440,538
Other operation and maintenance	113,553	98,681	333,805	302,437
Depreciation	50,983	48,206	151,810	144,578
Taxes, other than income taxes	64,696	56,780	176,324	159,575
Total expenses	613,373	510,272	1,685,413	1,478,915
Operating income (loss)
Total operating income	74,036	88,497	180,549	195,340
Retirement defined benefits expense—other than service costs	(682)	(1,421)	(2,934)	(4,279)
Allowance for borrowed funds used during construction	1,006	1,339	3,815	3,371
Allowance for equity funds used during construction	1,962	3,482	8,239	8,908
Interest expense and other charges, net	(18,968)	(16,907)	(54,822)	(52,625)
Income before income taxes	57,354	74,990	134,847	150,715
Income taxes	7,144	27,005	24,995	54,623
Net income	50,210	47,985	109,852	96,092
Preferred stock dividends of subsidiaries	228	228	686	686
Net income attributable to Hawaiian Electric	49,982	47,757	109,166	95,406
Preferred stock dividends of Hawaiian Electric	270	270	810	810
Net income for common stock	49,712	47,487	108,356	94,596
Electric utility
Revenues
Total revenues	687,409	598,769	1,865,962	1,674,255
Expenses
Total expenses	613,373	510,272	1,685,413	1,478,915
Operating income (loss)
Total operating income	74,036	88,497	180,549	195,340
Income before income taxes	57,354	74,990	134,847	150,715
Income taxes	7,144	27,005	24,995	54,623
Net income	50,210	47,985	109,852	96,092
Preferred stock dividends of subsidiaries	498	498	1,496	1,496
Net income for common stock	49,712	47,487	108,356	94,596
Bank
Revenues
Total revenues	80,496	74,289	233,019	222,474
Expenses
Total expenses	53,232	47,313	153,951	146,146
Operating income (loss)
Total operating income	27,264	26,976	79,068	76,328
Income before income taxes	26,831	26,764	77,845	75,720
Income taxes	5,610	9,172	17,103	25,582
Net income	21,221	17,592	60,742	50,138
Preferred stock dividends of subsidiaries	0	0	0	0
Net income for common stock	21,221	17,592	60,742	50,138
Other
Revenues
Total revenues	143	127	218	299
Expenses
Total expenses	3,379	4,127	11,083	12,954
Operating income (loss)
Total operating income	(3,236)	(4,000)	(10,865)	(12,655)
Income before income taxes	(6,952)	(6,615)	(22,601)	(20,088)
Income taxes	(1,892)	(1,582)	(5,625)	(8,202)
Net income	(5,060)	(5,033)	(16,976)	(11,886)
Preferred stock dividends of subsidiaries	(27)	(27)	(79)	(79)
Net income for common stock	$ (5,033)	$ (5,006)	$ (16,897)	$ (11,807)