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Retirement benefits (Tables)
 3 Months Ended
Mar. 31, 2014
Compensation and Retirement Disclosure [Abstract]  
Schedule of components of net periodic benefit cost for consolidated HEI
The components of net periodic benefit cost for HEI consolidated and Hawaiian Electric consolidated were as follows:
 
 
Pension benefits
 
Other benefits
Three months ended March 31
 
2014
 
2013
 
2014
 
2013
(in thousands)
 
 
 
 
 
 
 
 
HEI consolidated
 
 
 
 
 
 
 
 
Service cost
 
$
12,127

 
$
14,089

 
$
883

 
$
1,049

Interest cost
 
18,001

 
16,106

 
2,160

 
1,931

Expected return on plan assets
 
(20,347
)
 
(18,085
)
 
(2,708
)
 
(2,562
)
Amortization of net prior service loss (gain)
 
22

 
(24
)
 
(448
)
 
(448
)
Amortization of net actuarial loss (gain)
 
5,038

 
9,819

 
(3
)
 
521

Net periodic benefit cost (credit)
 
14,841

 
21,905

 
(116
)
 
491

Impact of PUC D&Os
 
(3,011
)
 
(8,866
)
 
445

 
(397
)
Net periodic benefit cost (adjusted for impact of PUC D&Os)
 
$
11,830

 
$
13,039

 
$
329

 
$
94

Hawaiian Electric consolidated
 
 
 
 
 
 
 
 
Service cost
 
$
11,697

 
$
13,603

 
$
856

 
$
1,014

Interest cost
 
16,436

 
14,676

 
2,079

 
1,861

Expected return on plan assets
 
(18,171
)
 
(16,090
)
 
(2,663
)
 
(2,520
)
Amortization of net prior service loss (gain)
 
15

 
(116
)
 
(451
)
 
(451
)
Amortization of net actuarial loss
 
4,560

 
8,790

 
—

 
504

Net periodic benefit cost (credit)
 
14,537

 
20,863

 
(179
)
 
408

Impact of PUC D&Os
 
(3,011
)
 
(8,866
)
 
445

 
(397
)
Net periodic benefit cost (adjusted for impact of PUC D&Os)
 
$
11,526

 
$
11,997

 
$
266

 
$
11
Schedule of effects of this revision on previous disclosures
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 table below illustrates the effects of this revision on the previous disclosures (the revised disclosures had no impact on the Company’s and the Utilities' Consolidated Balance Sheets, Consolidated Statements of Income or Consolidated Statements of Cash Flows):
 
 
HEI consolidated
 
Hawaiian Electric consolidated
Three months ended March 31, 2013
 
 As previously

 
 
 
 
 
 As previously

 
 
 
 
(in thousands)
 
 filed

 
 As revised

 
 Difference

 
 filed

 
 As revised

 
 Difference

Pension benefits:
 
 
 
 
 
 
 
 
 
 
 
 
Impact of PUC D&Os
 
$
(7,436
)
 
$
(8,866
)
 
$
(1,430
)
 
$
(7,436
)
 
$
(8,866
)
 
$
(1,430
)
Net periodic benefit cost (adjusted
 
 
 
 
 
 
 
 
 
 
 
 
   for impact of PUC D&Os)
 
14,469

 
13,039

 
(1,430
)
 
13,427

 
11,997

 
(1,430
)
 
 
 
 
 
 
 
 
 
 
 
 
 
(in millions)
 
 

 
 

 
 

 
 

 
 

 
 

Retirement benefits expense
 
$
11

 
$
10

 
$
(1
)
 
$
10

 
$
9

 
$
(1
)