Consolidated Statements of Cash Flows - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2014	Dec. 31, 2013		Dec. 31, 2012
Cash flows from operating activities
Net income		$ 170,210	$ 163,406	[1]	$ 140,548	[1]
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation of property, plant and equipment		172,762	160,061	[1]	150,389	[1]
Other amortization		6,795	4,667	[1]	7,958	[1]
Provision for loan losses		6,126	1,507	[1]	12,883	[1]
Impairment of utility assets		0	0	[1]	40,000	[1]
Loans receivable originated and purchased, held for sale		(155,755)	(249,022)	[1]	(519,622)	[1]
Proceeds from sale of loans receivable, held for sale		155,030	273,775	[1]	513,000	[1]
Gain on sale of credit card portfolio		0	(2,251)	[1]	0	[1]
Increase (decrease) in deferred income taxes		103,916	80,399	[1]	90,848	[1]
Share-based compensation expense		9,287	7,780	[1]	6,698	[1]
Excess tax benefits from share-based payment arrangements		(277)	(430)	[1]	(61)	[1]
Allowance for equity funds used during construction		(6,771)	(5,561)	[1]	(7,007)	[1]
Change in cash overdraft		(1,038)	1,038	[1]	0	[1]
Changes in assets and liabilities
Decrease (increase) in accounts receivable and unbilled revenues, net		33,089	16,038	[1]	(18,501)	[1]
Decrease in fuel oil stock		28,041	27,332	[1]	10,129	[1]
Increase in regulatory assets		(17,000)	(65,461)	[1]	(72,401)	[1]
Increase (decrease) in accounts, interest and dividends payable		(67,189)	12,406	[1]	5,497	[1]
Change in prepaid and accrued income taxes and utility revenue taxes		(39,091)	(19,406)	[1]	21,079	[1]
Increase (decrease) in defined benefit pension and other postretirement benefit plans liability		22,251	(33,014)	[1]	(228)	[1]
Change in other assets and liabilities		(94,966)	(11,696)	[1]	(102,275)	[1]
Net cash provided by operating activities		325,420	361,568	[1]	278,934	[1]
Cash flows from investing activities
Available-for-sale investment securities purchased		(183,778)	(112,654)	[1]	(243,633)	[1]
Principal repayments on available-for-sale investment and mortgage-related securities		91,013	158,558	[1]	191,253	[1]
Proceeds from sale of available-for-sale investment securities		79,564	71,367	[1]	3,548	[1]
Redemption of stock from Federal Home Loan Bank of Seattle		23,244	3,476	[1]	1,742	[1]
Net increase in loans held for investment		(283,810)	(398,426)	[1]	(112,730)	[1]
Proceeds from sale of real estate acquired in settlement of loans		3,213	9,212	[1]	11,336	[1]
Capital expenditures		(364,826)	(389,438)	[1]	(370,715)	[1]
Contributions in aid of construction		41,806	32,160	[1]	45,982	[1]
Proceeds from sale of credit card portfolio		0	26,386	[1]	0	[1]
Other		1,125	1,177	[1]	1,778	[1]
Net cash used in investing activities		(592,449)	(598,182)	[1]	(471,439)	[1]
Cash flows from financing activities
Net increase in deposit liabilities		250,938	142,561	[1]	159,884	[1]
Net increase in short-term borrowings with original maturities of three months or less		13,490	21,789	[1]	14,872	[1]
Net decrease in retail repurchase agreements		(9,465)	(1,418)	[1]	(37,291)	[1]
Proceeds from other bank borrowings		130,601	130,000	[1]	5,000	[1]
Repayments of other bank borrowings		(75,000)	(80,000)	[1]	(5,000)	[1]
Proceeds from issuance of long-term debt		125,000	286,000	[1]	457,000	[1]
Repayment of long-term debt		(111,400)	(216,000)	[1]	(375,500)	[1]
Excess tax benefits from share-based payment arrangements		277	430	[1]	61	[1]
Net proceeds from issuance of common stock		26,898	55,086	[1]	23,613	[1]
Common stock dividends		(126,458)	(98,383)	[1]	(96,202)	[1]
Preferred stock dividends of subsidiaries		(1,890)	(1,890)	[1]	(1,890)	[1]
Other		(456)	(1,187)	[1]	(2,645)	[1]
Net cash provided by (used in) financing activities		222,535	236,988	[1]	141,902	[1]
Net increase (decrease) in cash and cash equivalents		(44,494)	374	[1]	(50,603)	[1]
Cash and cash equivalents, January 1	[1]	220,036	219,662		270,265
Cash and cash equivalents, December 31		175,542	220,036	[1]	219,662	[1]
Hawaiian Electric Company, Inc. and Subsidiaries
Cash flows from operating activities
Net income		139,636	124,924	[1]	101,271	[1]
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation of property, plant and equipment		166,387	154,025	[1]	144,498	[1]
Other amortization		6,410	5,077	[1]	6,998	[1]
Impairment of utility assets		0	0	[1]	40,000	[1]
Increase (decrease) in deferred income taxes		82,947	64,507	[1]	86,878	[1]
Change in tax credits, net		6,062	7,017	[1]	6,075	[1]
Allowance for equity funds used during construction		(6,771)	(5,561)	[1]	(7,007)	[1]
Change in cash overdraft		(1,038)	1,038	[1]	0	[1]
Changes in assets and liabilities
Decrease (increase) in accounts receivable		26,743	49,445	[1]	(47,004)	[1]
Decrease (increase) in accrued unbilled revenues		6,750	(9,826)	[1]	3,528	[1]
Decrease in fuel oil stock		28,041	27,332	[1]	10,129	[1]
Decrease (increase) in materials and supplies		1,794	(7,959)	[1]	(7,897)	[1]
Increase in regulatory assets		(17,000)	(65,461)	[1]	(72,401)	[1]
Increase (decrease) in accounts payable		(65,527)	14,731	[1]	6,322	[1]
Change in prepaid and accrued income taxes and utility revenue taxes		(4,036)	(2,028)	[1]	25,239	[1]
Increase (decrease) in defined benefit pension and other postretirement benefit plans liability		(961)	2,240	[1]	(744)	[1]
Change in other assets and liabilities		(62,442)	(32,636)	[1]	(74,262)	[1]
Net cash provided by operating activities		306,995	326,865	[1]	221,623	[1]
Cash flows from investing activities
Capital expenditures		(336,679)	(378,044)	[1]	(355,326)	[1]
Contributions in aid of construction		41,806	32,160	[1]	45,982	[1]
Other		1,164	907	[1]	843	[1]
Net cash used in investing activities		(293,709)	(344,977)	[1]	(308,501)	[1]
Cash flows from financing activities
Proceeds from issuance of long-term debt		0	236,000	[1]	457,000	[1]
Repayment of long-term debt		(11,400)	(166,000)	[1]	(368,500)	[1]
Net proceeds from issuance of common stock		40,000	78,500	[1]	44,000	[1]
Common stock dividends		(88,492)	(81,578)	[1]	(73,044)	[1]
Preferred stock dividends of Hawaiian Electric and subsidiaries		(1,995)	(1,995)	[1]	(1,995)	[1]
Other		(462)	(1,149)	[1]	(2,230)	[1]
Net cash provided by (used in) financing activities		(62,349)	63,778	[1]	55,231	[1]
Net increase (decrease) in cash and cash equivalents		(49,063)	45,666	[1]	(31,647)	[1]
Cash and cash equivalents, January 1	[1]	62,825	17,159		48,806
Cash and cash equivalents, December 31		$ 13,762	$ 62,825	[1]	$ 17,159	[1]

[1] As restated - See Note 1, “Summary of significant accounting policies - Revision and restatements of previously issued financial statements.”