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Retirement benefits (Tables)
 6 Months Ended
Jun. 30, 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:
 
 
Three months ended June 30
 
Six months ended June 30
 
 
Pension benefits
 
Other benefits
 
Pension benefits
 
Other benefits
(in thousands)
 
2014
 
2013
 
2014
 
2013
 
2014
 
2013
 
2014
 
2013
HEI consolidated
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Service cost
 
$
12,525

 
$
14,121

 
$
866

 
$
1,103

 
$
24,652

 
$
28,210

 
$
1,749

 
$
2,152

Interest cost
 
18,113

 
16,307

 
2,117

 
1,855

 
36,114

 
32,413

 
4,277

 
3,786

Expected return on plan assets
 
(20,334
)
 
(18,182
)
 
(2,748
)
 
(2,521
)
 
(40,681
)
 
(36,267
)
 
(5,456
)
 
(5,083
)
Amortization of net prior service loss (gain)
 
22

 
(25
)
 
(449
)
 
(449
)
 
44

 
(49
)
 
(897
)
 
(897
)
Amortization of net actuarial loss (gain)
 
5,138

 
9,499

 
(3
)
 
284

 
10,176

 
19,318

 
(6
)
 
805

Net periodic benefit cost (credit)
 
15,464

 
21,720

 
(217
)
 
272

 
30,305

 
43,625

 
(333
)
 
763

Impact of PUC D&Os
 
(3,651
)
 
(10,724
)
 
543

 
(187
)
 
(6,662
)
 
(19,590
)
 
988

 
(584
)
Net periodic benefit cost (adjusted for impact of PUC D&Os)
 
$
11,813

 
$
10,996

 
$
326

 
$
85

 
$
23,643

 
$
24,035

 
$
655

 
$
179

Hawaiian Electric consolidated
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Service cost
 
$
12,101

 
$
13,638

 
$
840

 
$
1,067

 
$
23,798

 
$
27,241

 
$
1,696

 
$
2,081

Interest cost
 
16,553

 
14,883

 
2,038

 
1,783

 
32,989

 
29,559

 
4,117

 
3,644

Expected return on plan assets
 
(18,158
)
 
(16,185
)
 
(2,707
)
 
(2,480
)
 
(36,329
)
 
(32,275
)
 
(5,370
)
 
(5,000
)
Amortization of net prior service loss (gain)
 
16

 
(116
)
 
(451
)
 
(451
)
 
31

 
(232
)
 
(902
)
 
(902
)
Amortization of net actuarial loss
 
4,669

 
8,509

 
—

 
268

 
9,229

 
17,299

 
—

 
772

Net periodic benefit cost (credit)
 
15,181

 
20,729

 
(280
)
 
187

 
29,718

 
41,592

 
(459
)
 
595

Impact of PUC D&Os
 
(3,651
)
 
(10,724
)
 
543

 
(187
)
 
(6,662
)
 
(19,590
)
 
988

 
(584
)
Net periodic benefit cost (adjusted for impact of PUC D&Os)
 
$
11,530

 
$
10,005

 
$
263

 
$
—

 
$
23,056

 
$
22,002

 
$
529

 
$
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
 
 
 
 
 
 
Consolidated Statements of Income
 
 
 
 
 
 
Three months ended June 30, 2013
 
 
 
 
 
 
Revenues
 
$
796,730

 
$
794,567

 
$
(2,163
)
Operating income
 
82,370

 
80,207

 
(2,163
)
Interest expense, net—other than on deposit liabilities and other bank borrowings
 
(19,613
)
 
(18,442
)
 
1,171

Income before income taxes
 
64,715

 
63,723

 
(992
)
Income taxes
 
23,654

 
22,662

 
(992
)
Six months ended June 30, 2013
 
 
 
 
 
 
Revenues
 
1,580,794

 
1,576,799

 
(3,995
)
Operating income
 
153,027

 
149,032

 
(3,995
)
Interest expense, net—other than on deposit liabilities and other bank borrowings
 
(39,401
)
 
(37,173
)
 
2,228

Income before income taxes
 
117,529

 
115,762

 
(1,767
)
Income taxes
 
42,316

 
40,549

 
(1,767
)
Consolidated Balance Sheets
 
 
 
 
 
 
December 31, 2013
 
 
 
 
 
 
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
 
 
 
 
 
 
December 31, 2013
 
 
 
 
 
 
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

 
 As previously

 
 
 
 
 
 As previously

 
 
 
 
(in thousands)
 
 filed

 
 As revised

 
 Difference

 
 filed

 
 As revised

 
 Difference

Three months ended June 30, 2013
 
 
 
 
 
 
 
 
 
 
 
 
Pension benefits:
 
 
 
 
 
 
 
 
 
 
 
 
Impact of PUC D&Os
 
$
(5,286
)
 
$
(10,724
)
 
$
(5,438
)
 
$
(5,286
)
 
$
(10,724
)
 
$
(5,438
)
Net periodic benefit cost (adjusted
 
 
 
 
 
 
 
 
 
 
 
 
   for impact of PUC D&Os)
 
16,434

 
10,996

 
(5,438
)
 
15,443

 
10,005

 
(5,438
)
 
 
 
 
 
 
 
 
 
 
 
 
 
Six months ended June 30, 2013
 
 
 
 
 
 
 
 
 
 
 
 
Pension benefits:
 
 
 
 
 
 
 
 
 
 
 
 
Impact of PUC D&Os
 
(12,722
)
 
(19,590
)
 
(6,868
)
 
(12,722
)
 
(19,590
)
 
(6,868
)
Net periodic benefit cost (adjusted
 
 
 
 
 
 
 
 
 
 
 
 
   for impact of PUC D&Os)
 
30,903

 
24,035

 
(6,868
)
 
28,870

 
22,002

 
(6,868
)
(in millions)
 
 

 
 

 
 

 
 

 
 

 
 

Retirement benefits expense
 
$
23

 
$
18

 
$
(5
)
 
$
21

 
$
15

 
$
(6
)
The table below illustrates the effects of this revision on the previous disclosure (the revised disclosure had no impact on the Company’s Consolidated Balance Sheets, Consolidated Statements of Income or Consolidated Statements of Cash Flows):
 
 
Three months ended June 30, 2013
 
Six months ended June 30, 2013
(in millions)
 
As previously filed

 
As revised

 
Difference

 
As previously filed

 
As revised

 
Difference

Share-based compensation expense
 
$
1.1

 
$
1.3

 
$
0.2

 
$
3.0

 
$
3.5

 
$
0.5

Income tax benefit
 
0.4

 
0.5

 
0.1

 
1.1

 
1.3

 
0.2