Condensed Consolidated Balance Sheets (unaudited) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Assets
Cash and cash equivalents	$ 244,785	$ 261,881
Accounts receivable and unbilled revenues, net	266,336	263,209
Available-for-sale investment securities, at fair value	1,418,490	1,401,198
Held-to-maturity investment securities, at amortized cost	43,450	44,515
Stock in Federal Home Loan Bank, at cost	10,158	9,706
Loans held for investment, net	4,688,129	4,617,131
Loans held for sale, at lower of cost or fair value	7,379	11,250
Property, plant and equipment, net of accumulated depreciation	4,542,558	4,460,248
Regulatory assets	872,499	869,297
Other	526,744	513,535
Goodwill	82,190	82,190
Utility property, plant and equipment
Total property, plant and equipment, net	4,542,558	4,460,248
Current assets
Cash and cash equivalents	244,785	261,881
Other long-term assets
Total assets	12,702,718	12,534,160
Liabilities
Accounts payable	190,221	193,714
Interest and dividends payable	29,786	25,837
Deposit liabilities	6,079,067	5,890,597
Short-term borrowings—other than bank	238,445	117,945
Other bank borrowings	100,430	190,859
Long-term debt, net—other than bank	1,684,002	1,683,797
Deferred income taxes	381,478	388,430
Regulatory liabilities	895,093	880,770
Defined benefit pension and other postretirement benefit plans liability	502,304	509,514
Other	475,822	521,018
Total liabilities	10,576,648	10,402,481
Capitalization
Retained earnings	483,342	476,836
Accumulated other comprehensive loss, net of tax benefits	(54,714)	(41,941)
Total shareholders’ equity	2,091,777	2,097,386
Preferred stock, no par value, authorized 10,000,000 shares; issued: none	0	0
Preferred stock of subsidiaries - not subject to mandatory redemption	34,293	34,293
Commitments and contingencies
Current liabilities
Interest and dividends payable	29,786	25,837
Deferred credits and other liabilities
Deferred income taxes	381,478	388,430
Shareholders’ equity
Preferred stock, no par value, authorized 10,000,000 shares; issued: none	0	0
Common stock, no par value, authorized 200,000,000 shares; issued and outstanding: 108,841,157 shares and 108,787,807 shares at March 31, 2018 and December 31, 2017, respectively	1,663,149	1,662,491
Retained earnings	483,342	476,836
Accumulated other comprehensive loss, net of tax benefits	(54,714)	(41,941)
Total shareholders’ equity	2,091,777	2,097,386
Total liabilities and shareholders’ equity	12,702,718	12,534,160
Hawaiian Electric Company, Inc. and Subsidiaries
Assets
Cash and cash equivalents	23,399	12,517
Property, plant and equipment, net of accumulated depreciation	4,296,732	4,248,539
Utility property, plant and equipment
Land	52,940	53,177
Plant and equipment	6,452,215	6,401,040
Less accumulated depreciation	(2,507,942)	(2,476,352)
Construction in progress	291,937	263,094
Utility property, plant and equipment, net	4,289,150	4,240,959
Nonutility property, plant and equipment, less accumulated depreciation	7,582	7,580
Total property, plant and equipment, net	4,296,732	4,248,539
Current assets
Cash and cash equivalents	23,399	12,517
Customer accounts receivable, net	141,433	127,889
Accrued unbilled revenues, net	99,635	107,054
Other accounts receivable, net	3,953	7,163
Fuel oil stock, at average cost	88,723	86,873
Materials and supplies, at average cost	55,692	54,397
Prepayments and other	30,208	25,355
Regulatory assets	102,800	88,390
Total current assets	545,843	509,638
Other long-term assets
Regulatory assets	769,699	780,907
Other	98,295	91,529
Total other long-term assets	867,994	872,436
Total assets	5,710,569	5,630,613
Liabilities
Interest and dividends payable	26,204	22,575
Deferred income taxes	393,089	394,041
Capitalization
Common stock ($6 2/3 par value, authorized 50,000,000 shares; outstanding 16,142,216 shares at March 31, 2018 and December 31, 2017)	107,634	107,634
Premium on capital stock	614,667	614,675
Retained earnings	1,125,842	1,124,193
Accumulated other comprehensive loss, net of tax benefits	(1,188)	(1,219)
Total shareholders’ equity	1,846,955	1,845,283
Preferred stock, no par value, authorized 10,000,000 shares; issued: none	34,293	34,293
Long-term debt, net	1,318,654	1,318,516
Total capitalization	3,199,902	3,198,092
Commitments and contingencies
Current liabilities
Current portion of long-term debt	49,973	49,963
Short-term borrowings from non-affiliates	121,983	4,999
Accounts payable	142,399	159,610
Interest and dividends payable	26,204	22,575
Taxes accrued, including revenue taxes	166,465	199,101
Regulatory liabilities	6,933	3,401
Other	59,875	59,456
Total current liabilities	573,832	499,105
Deferred credits and other liabilities
Deferred income taxes	393,089	394,041
Regulatory liabilities	888,160	877,369
Unamortized tax credits	91,936	90,369
Defined benefit pension and other postretirement benefit plans liability	465,626	472,948
Other	98,024	98,689
Total deferred credits and other liabilities	1,936,835	1,933,416
Shareholders’ equity
Preferred stock, no par value, authorized 10,000,000 shares; issued: none	34,293	34,293
Retained earnings	1,125,842	1,124,193
Accumulated other comprehensive loss, net of tax benefits	(1,188)	(1,219)
Total shareholders’ equity	1,846,955	1,845,283
Total liabilities and shareholders’ equity	$ 5,710,569	$ 5,630,613