Consolidated Balance Sheets - HECO (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Other long-term assets
Total assets	$ 10,238,145	$ 10,149,132
Capitalization
Retained earnings	230,067	216,804
Accumulated other comprehensive loss, net of income tax benefits-retirement benefit plans	(35,035)	(36,424)
Cumulative preferred stock - not subject to mandatory redemption
Commitments and contingencies (Note 5)
Current liabilities
Interest and preferred dividends payable	25,503	26,258
Deferred credits and other liabilities
Deferred income taxes	474,197	439,329
Contributions in aid of construction	419,337	405,520
Total liabilities and shareholders' equity	10,238,145	10,149,132
Hawaiian Electric Company, Inc. and Subsidiaries
Utility plant, at cost
Land	51,622	51,568
Plant and equipment	5,492,118	5,364,400
Less accumulated depreciation	(2,082,532)	(2,040,789)
Construction in progress	166,902	151,378
Net utility plant	3,628,110	3,526,557
Current assets
Cash and cash equivalents	8,617	17,159
Customer accounts receivable, net	196,643	210,779
Accrued unbilled revenues, net	139,187	134,298
Other accounts receivable, net	10,059	28,176
Fuel oil stock, at average cost	117,445	161,419
Materials and supplies, at average cost	58,224	51,085
Prepayments and other	38,301	32,865
Regulatory assets	63,672	51,267
Total current assets	632,148	687,048
Other long-term assets
Regulatory assets	821,353	813,329
Unamortized debt expense	9,948	10,554
Other	70,260	71,305
Total other long-term assets	901,561	895,188
Total assets	5,161,819	5,108,793
Capitalization
Common stock ($6 2/3 par value, authorized 50,000,000 shares; outstanding 14,665,264 shares)	97,788	97,788
Premium on capital stock	468,045	468,045
Retained earnings	919,606	907,273
Accumulated other comprehensive loss, net of income tax benefits-retirement benefit plans	(935)	(970)
Common stock equity	1,484,504	1,472,136
Cumulative preferred stock - not subject to mandatory redemption	34,293	34,293
Long-term debt, net	1,147,877	1,147,872
Total capitalization	2,666,674	2,654,301
Commitments and contingencies (Note 5)
Current liabilities
Short-term borrowings from nonaffiliates	53,992
Accounts payable	150,877	186,824
Interest and preferred dividends payable	20,325	21,092
Taxes accrued	218,850	251,066
Other	77,895	62,879
Total current liabilities	521,939	521,861
Deferred credits and other liabilities
Deferred income taxes	456,952	417,611
Regulatory liabilities	327,254	322,074
Unamortized tax credits	69,526	66,584
Defined benefit pension and other postretirement benefit plans liability	605,026	620,205
Other	95,111	100,637
Total deferred credits and other liabilities	1,553,869	1,527,111
Contributions in aid of construction	419,337	405,520
Total liabilities and shareholders' equity	$ 5,161,819	$ 5,108,793