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Segment financial information
 6 Months Ended
Jun. 30, 2019
Segment Reporting [Abstract]  
Segment financial information Segment financial information
(in thousands) 
 
Electric utility
 
Bank
 
Other
 
Total
Three months ended June 30, 2019
 
 

 
 

 
 

 
 

Revenues from external customers
 
$
633,771

 
$
81,687

 
$
27

 
$
715,485

Intersegment revenues (eliminations)
 
13

 
—

 
(13
)
 
—

Revenues
 
$
633,784

 
$
81,687

 
$
14

 
$
715,485

Income (loss) before income taxes
 
$
40,817

 
$
21,292

 
$
(9,415
)
 
$
52,694

Income taxes (benefit)
 
7,744

 
4,276

 
(2,311
)
 
9,709

Net income (loss)
 
33,073

 
17,016

 
(7,104
)
 
42,985

Preferred stock dividends of subsidiaries
 
499

 
—

 
(26
)
 
473

Net income (loss) for common stock
 
$
32,574

 
$
17,016

 
$
(7,078
)
 
$
42,512

Six months ended June 30, 2019
 
 

 
 

 
 

 
 

Revenues from external customers
 
$
1,212,253

 
$
164,739

 
$
108

 
$
1,377,100

Intersegment revenues (eliminations)
 
26

 
—

 
(26
)
 
—

Revenues
 
$
1,212,279

 
$
164,739

 
$
82

 
$
1,377,100

Income (loss) before income taxes
 
$
82,676

 
$
47,454

 
$
(19,397
)
 
$
110,733

Income taxes (benefit)
 
16,978

 
9,599

 
(4,990
)
 
21,587

Net income (loss)
 
65,698

 
37,855

 
(14,407
)
 
89,146

Preferred stock dividends of subsidiaries
 
998

 
—

 
(52
)
 
946

Net income (loss) for common stock
 
$
64,700

 
$
37,855

 
$
(14,355
)
 
$
88,200

Total assets (at June 30, 2019)
 
$
6,253,846

 
$
7,164,054

 
$
119,866

 
$
13,537,766

Three months ended June 30, 2018
 
 

 
 

 
 

 
 

Revenues from external customers
 
$
608,112

 
$
77,104

 
$
61

 
$
685,277

Intersegment revenues (eliminations)
 
14

 
—

 
(14
)
 
—

Revenues
 
$
608,126

 
$
77,104

 
$
47

 
$
685,277

Income (loss) before income taxes
 
$
40,344

 
$
26,514

 
$
(7,276
)
 
$
59,582

Income taxes (benefit)
 
8,676

 
5,953

 
(1,574
)
 
13,055

Net income (loss)
 
31,668

 
20,561

 
(5,702
)
 
46,527

Preferred stock dividends of subsidiaries
 
499

 
—

 
(26
)
 
473

Net income (loss) for common stock
 
$
31,169

 
$
20,561

 
$
(5,676
)
 
$
46,054

Six months ended June 30, 2018
 
 

 
 

 
 

 
 

Revenues from external customers
 
$
1,178,526

 
$
152,523

 
$
102

 
$
1,331,151

Intersegment revenues (eliminations)
 
27

 
—

 
(27
)
 
—

Revenues
 
$
1,178,553

 
$
152,523

 
$
75

 
$
1,331,151

Income (loss) before income taxes
 
$
77,493

 
$
51,014

 
$
(15,649
)
 
$
112,858

Income taxes (benefit)
 
17,851

 
11,493

 
(3,733
)
 
25,611

Net income (loss)
 
59,642

 
39,521

 
(11,916
)
 
87,247

Preferred stock dividends of subsidiaries
 
998

 
—

 
(52
)
 
946

Net income (loss) for common stock
 
$
58,644

 
$
39,521

 
$
(11,864
)
 
$
86,301

Total assets (at December 31, 2018)
 
$
5,967,503

 
$
7,027,894

 
$
108,654

 
$
13,104,051


 
Intercompany electricity sales of the Utilities to the bank and “other” segments are not eliminated because those segments would need to purchase electricity from another source if it were not provided by the Utilities and the profit on such sales is nominal.
Bank fees that ASB charges the Utilities and “other” segments are not eliminated because those segments would pay fees to another financial institution if they were to bank with another institution and the profit on such fees is nominal.
Hamakua Energy, LLC’s (Hamakua Energy’s) sales to Hawaii Electric Light (a regulated affiliate) are eliminated in consolidation.