Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash flows from operating activities
Net income	$ 170,210	$ 163,406	$ 140,548
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation of property, plant and equipment	172,762	160,061	150,389
Other amortization	8,476	4,667	7,958
Provision for loan losses	6,126	1,507	12,883
Impairment of utility assets	0	0	40,000
Loans receivable originated and purchased, held for sale	(155,755)	(249,022)	(519,622)
Proceeds from sale of loans receivable, held for sale	155,030	273,775	513,000
Gain on sale of credit card portfolio	0	(2,251)	0
Increase in deferred income taxes	59,184	80,399	90,848
Excess tax benefits from share-based payment arrangements	(277)	(430)	(61)
Allowance for equity funds used during construction	(6,771)	(5,561)	(7,007)
Change in cash overdraft	(1,038)	1,038	0
Changes in assets and liabilities
Decrease (increase) in accounts receivable and unbilled revenues, net	33,089	16,038	(18,501)
Decrease in fuel oil stock	28,041	27,332	10,129
Increase in regulatory assets	(17,000)	(65,461)	(72,401)
Decrease in accounts, interest and dividends payable	(92,294)	(23,153)	(39,738)
Change in prepaid and accrued income taxes and revenue taxes	12,845	(19,406)	21,079
Increase (decrease) in defined benefit pension and other postretirement benefit plans liability	22,251	(33,014)	(228)
Change in other assets and liabilities	(93,400)	(2,779)	(94,734)
Net cash provided by operating activities	301,479	327,146	234,542
Cash flows from investing activities
Available-for-sale investment securities purchased	(183,778)	(112,654)	(243,633)
Principal repayments on available-for-sale investment and mortgage-related securities	91,013	158,558	191,253
Proceeds from sale of available-for-sale investment securities	79,564	71,367	3,548
Redemption of stock from Federal Home Loan Bank of Seattle	23,244	3,476	1,742
Net increase in loans held for investment	(283,810)	(398,426)	(112,730)
Proceeds from sale of real estate acquired in settlement of loans	3,213	9,212	11,336
Capital expenditures	(339,721)	(353,879)	(325,480)
Contributions in aid of construction	41,806	32,160	45,982
Proceeds from sale of credit card portfolio	0	26,386	0
Other	(39)	40	935
Net cash used in investing activities	(568,508)	(563,760)	(427,047)
Cash flows from financing activities
Net increase in deposit liabilities	250,938	142,561	159,884
Net increase in short-term borrowings with original maturities of three months or less	13,490	21,789	14,872
Net decrease in retail repurchase agreements	(9,465)	(1,418)	(37,291)
Proceeds from other bank borrowings	130,601	130,000	5,000
Repayments of other bank borrowings	(75,000)	(80,000)	(5,000)
Proceeds from issuance of long-term debt	125,000	286,000	457,000
Repayment of long-term debt	(111,400)	(216,000)	(375,500)
Excess tax benefits from share-based payment arrangements	277	430	61
Net proceeds from issuance of common stock	26,898	55,086	23,613
Common stock dividends	(126,458)	(98,383)	(96,202)
Preferred stock dividends of subsidiaries	(1,890)	(1,890)	(1,890)
Other	(456)	(1,187)	(2,645)
Net cash provided by (used in) financing activities	222,535	236,988	141,902
Net increase (decrease) in cash and cash equivalents	(44,494)	374	(50,603)
Cash and cash equivalents, January 1	220,036	219,662	270,265
Cash and cash equivalents, December 31	175,542	220,036	219,662
Hawaiian Electric Company, Inc. and Subsidiaries
Cash flows from operating activities
Net income	139,636	124,924	101,271
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation of property, plant and equipment	166,387	154,025	144,498
Other amortization	8,091	5,077	6,998
Impairment of utility assets	0	0	40,000
Increase in deferred income taxes	82,947	64,507	86,878
Change in tax credits, net	6,062	7,017	6,075
Allowance for equity funds used during construction	(6,771)	(5,561)	(7,007)
Change in cash overdraft	(1,038)	1,038	0
Changes in assets and liabilities
Decrease (increase) in accounts receivable	26,743	49,445	(47,004)
Decrease (increase) in accrued unbilled revenues	6,750	(9,826)	3,528
Decrease in fuel oil stock	28,041	27,332	10,129
Decrease (increase) in materials and supplies	1,794	(7,959)	(7,897)
Increase in regulatory assets	(17,000)	(65,461)	(72,401)
Decrease in accounts payable	(90,632)	(20,828)	(38,913)
Change in prepaid and accrued income taxes and revenue taxes	(4,036)	(2,028)	25,239
Increase (decrease) in defined benefit pension and other postretirement benefit plans liability	(961)	2,240	(744)
Change in other assets and liabilities	(62,959)	(31,499)	(73,419)
Net cash provided by operating activities	283,054	292,443	177,231
Cash flows from investing activities
Capital expenditures	(311,574)	(342,485)	(310,091)
Contributions in aid of construction	41,806	32,160	45,982
Other	0	(230)	0
Net cash used in investing activities	(269,768)	(310,555)	(264,109)
Cash flows from financing activities
Proceeds from issuance of long-term debt	0	236,000	457,000
Repayment of long-term debt	(11,400)	(166,000)	(368,500)
Net proceeds from issuance of common stock	40,000	78,500	44,000
Common stock dividends	(88,492)	(81,578)	(73,044)
Preferred stock dividends of Hawaiian Electric and subsidiaries	(1,995)	(1,995)	(1,995)
Other	(462)	(1,149)	(2,230)
Net cash provided by (used in) financing activities	(62,349)	63,778	55,231
Net increase (decrease) in cash and cash equivalents	(49,063)	45,666	(31,647)
Cash and cash equivalents, January 1	62,825	17,159	48,806
Cash and cash equivalents, December 31	$ 13,762	$ 62,825	$ 17,159