Condensed Consolidated Statements of Income (unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Revenues
Total revenues	$ 632,281	$ 566,244	$ 1,223,843	$ 1,117,204
Expenses
Purchased power	153,000	139,000	280,000	255,000
Total expenses	556,385	480,789	1,080,085	962,898
Operating income (loss)
Total operating income	75,896	85,455	143,758	154,306
Interest expense, net—other than on deposit liabilities and other bank borrowings	(20,440)	(17,301)	(40,008)	(37,427)
Allowance for borrowed funds used during construction	1,143	760	2,032	1,422
Allowance for equity funds used during construction	3,027	1,997	5,426	3,736
Income before income taxes	59,626	70,911	111,208	122,037
Income taxes	20,492	26,310	37,408	44,611
Net income	39,134	44,601	73,800	77,426
Preferred stock dividends of subsidiaries	473	473	946	946
Net income for common stock	$ 38,661	$ 44,128	$ 72,854	$ 76,480
Basic earnings per common share (in dollars per share)	$ 0.36	$ 0.41	$ 0.67	$ 0.71
Diluted earnings per common share (in dollars per share)	0.36	0.41	0.67	0.71
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)	108,750	107,962	108,712	107,791
Net effect of potentially dilutive shares (in shares)	47	171	157	187
Weighted-average shares assuming dilution (in shares)	108,797	108,133	108,869	107,978
Hawaiian Electric Company, Inc. and Subsidiaries
Revenues
Total revenues	$ 556,875	$ 495,395	$ 1,075,486	$ 977,447
Expenses
Fuel oil	141,259	91,899	285,529	205,639
Purchased power	153,067	139,058	280,191	254,917
Other operation and maintenance	106,374	99,563	206,614	203,471
Depreciation	48,156	46,760	96,372	93,541
Taxes, other than income taxes	52,972	47,429	102,795	93,867
Total expenses	501,828	424,709	971,501	851,435
Operating income (loss)
Total operating income	55,047	70,686	103,985	126,012
Allowance for borrowed funds used during construction	1,143	760	2,032	1,422
Allowance for equity funds used during construction	3,027	1,997	5,426	3,736
Interest expense and other charges, net	(18,214)	(15,103)	(35,718)	(32,411)
Income before income taxes	41,003	58,340	75,725	98,759
Income taxes	14,860	21,984	27,618	36,537
Net income	26,143	36,356	48,107	62,222
Preferred stock dividends of subsidiaries	229	229	458	458
Net income attributable to Hawaiian Electric	25,914	36,127	47,649	61,764
Preferred stock dividends of Hawaiian Electric	270	270	540	540
Net income for common stock	25,644	35,857	47,109	61,224
Electric utility
Revenues
Total revenues	556,875	495,395	1,075,486	977,447
Expenses
Total expenses	501,828	424,709	971,501	851,435
Operating income (loss)
Total operating income	55,047	70,686	103,985	126,012
Income before income taxes	41,003	58,340	75,725	98,759
Income taxes	14,860	21,984	27,618	36,537
Net income	26,143	36,356	48,107	62,222
Preferred stock dividends of subsidiaries	499	499	998	998
Net income for common stock	25,644	35,857	47,109	61,224
Bank
Revenues
Total revenues	75,329	70,749	148,185	139,589
Expenses
Total expenses	50,533	50,525	99,229	99,771
Operating income (loss)
Total operating income	24,796	20,224	48,956	39,818
Income before income taxes	24,796	20,224	48,956	39,818
Income taxes	8,063	6,939	16,410	13,860
Net income	16,733	13,285	32,546	25,958
Preferred stock dividends of subsidiaries	0	0	0	0
Net income for common stock	16,733	13,285	32,546	25,958
Other
Revenues
Total revenues	77	100	172	168
Expenses
Total expenses	4,024	5,555	9,355	11,692
Operating income (loss)
Total operating income	(3,947)	(5,455)	(9,183)	(11,524)
Income before income taxes	(6,173)	(7,653)	(13,473)	(16,540)
Income taxes	(2,431)	(2,613)	(6,620)	(5,786)
Net income	(3,742)	(5,040)	(6,853)	(10,754)
Preferred stock dividends of subsidiaries	(26)	(26)	(52)	(52)
Net income for common stock	$ (3,716)	$ (5,014)	$ (6,801)	$ (10,702)