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Basis of presentation
 3 Months Ended
Mar. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Basis of presentation
Basis of presentation
The accompanying unaudited consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America (GAAP) for interim financial information, the instructions to SEC Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. In preparing the financial statements, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the balance sheet and the reported amounts of revenues and expenses for the period. Actual results could differ significantly from those estimates. The accompanying unaudited consolidated financial statements and the following notes should be read in conjunction with the audited consolidated financial statements and the notes thereto in HEI’s and Hawaiian Electric's Form 10-K for the year ended December 31, 2013.
In the opinion of HEI’s and Hawaiian Electric's management, the accompanying unaudited consolidated financial statements contain all material adjustments required by GAAP to fairly state the Company’s and Hawaiian Electric's financial position as of March 31, 2014 and December 31, 2013, the results of its operations and its cash flows for the three months ended March 31, 2014 and 2013. All such adjustments are of a normal recurring nature, unless otherwise disclosed in this Form 10-Q or other referenced material. Results of operations for interim periods are not necessarily indicative of results for the full year. When required, certain reclassifications are made to the prior period’s consolidated financial statements to conform to the current presentation.
Reclassifications and revisions. In the fourth quarter of 2013, Hawaiian Electric changed its consolidated statements of income for 2013 and prior comparative periods from a utility presentation to a commercial company presentation, under which all operating revenues and expenses (including non-regulated revenues and expenses) are included in the determination of operating income. Additionally, income tax expense, which was previously included partially in operating expenses and partially in other income (deductions), is now entirely presented directly above net income in income taxes and includes income taxes related to non-regulated revenues and expenses.
In making the change to a commercial company presentation, the Company discovered that interest on the Utilities’ uncollected revenue balancing accounts and the income tax gross-up adjustment for AFUDC-equity were incorrectly included in HEI consolidated revenues and is revising its previously filed quarterly Consolidated Statements of Income for 2013 to move the amounts to “Interest expense, net-other than on deposit liabilities and other bank borrowings” and income taxes, respectively. Such quarterly amounts were not considered to be material to previously filed financial statements.
The Company and the Utilities have also revised their property, plant and equipment as of December 31, 2013 to correct for an error that excluded Hawaiian Electric consolidated non-utility property plant and equipment amounts. These amounts were not considered to be material to previously filed financial statements.
The table below illustrates the effects of the revisions on the previously filed financial statements:
 
 
 As previously

 
As

 
 
(in thousands)
 
 filed

 
revised

 
 Difference

HEI consolidated
 
 
 
 
 
 
Three months ended March 31, 2013
 
 
 
 
 
 
Consolidated Statements of Income
 
 
 
 
 
 
Revenues
 
$
784,064

 
$
782,232

 
$
(1,832
)
Operating income
 
70,657

 
68,825

 
(1,832
)
Interest expense, net—other than on deposit liabilities and other bank borrowings
 
(19,788
)
 
(18,731
)
 
1,057

Income before income taxes
 
52,814

 
52,039

 
(775
)
Income taxes
 
18,662

 
17,887

 
(775
)
December 31, 2013
 
 
 
 
 
 
Consolidated Balance Sheets
 
 
 
 
 
 
Property, plant and equipment, net of accumulated depreciation
 
3,858,947

 
3,865,514

 
6,567

Accumulated depreciation
 
(2,191,199
)
 
(2,192,422
)
 
(1,223
)
Other assets
 
519,194

 
512,627

 
(6,567
)
Hawaiian Electric consolidated
 
 
 
 
 
 
Consolidated Balance Sheets
 
 
 
 
 
 
Other assets
 
73,993

 
67,426

 
(6,567
)

The reclassifications and revisions made to prior periods’ financial statements for the three months ended March 31, 2013 and as of December 31, 2013 to conform to the presentation for the three months ended, and as of, March 31, 2014 did not affect previously reported net income and cash flows.