v3.26.1
Electric utility segment - Schedule of Condensed Consolidating Statement of Changes in Common Stock Equity (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Mar. 31, 2026
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2026
Jun. 30, 2025
Increase (decrease) in stockholders' equity            
Beginning balance $ 1,637,369 $ 1,605,919 $ 1,505,876 $ 1,479,089 $ 1,605,919 $ 1,479,089
Net income for common stock 123,200 30,450 26,085 26,671    
Other comprehensive loss, net of tax benefits (75) (74) (306) (460) (149) (766)
Ending balance 1,762,887 1,637,369 1,534,432 1,505,876 1,762,887 1,534,432
Hawaiian Electric consolidated            
Increase (decrease) in stockholders' equity            
Beginning balance 1,608,695 1,583,399 1,492,244 1,156,955 1,583,399 1,156,955
Net income for common stock 137,858 35,343 39,150 47,816 173,201 86,966
Other comprehensive loss, net of tax benefits (47) (47) (47) (47) (94) (94)
Common stock dividends (11,000) (10,000) (10,000)   (21,000) (10,000)
Issuance of common stock, net of expenses         0  
Additional paid-in capital 130,752   270 287,520 130,752 287,790
Ending balance 1,866,258 1,608,695 1,521,617 1,492,244 1,866,258 1,521,617
Consolidating adjustments | Hawaiian Electric consolidated            
Increase (decrease) in stockholders' equity            
Beginning balance   (734,296)   (680,414) (734,296) (680,414)
Net income for common stock         (36,136) (17,492)
Other comprehensive loss, net of tax benefits 13   13   29 31
Issuance of common stock, net of expenses         (66,000)  
Additional paid-in capital         (86,048) (458)
Ending balance (922,451)   (698,333)   (922,451) (698,333)
Hawaiian Electric | Reportable Legal Entities | Hawaiian Electric consolidated            
Increase (decrease) in stockholders' equity            
Beginning balance   1,583,399   1,156,955 1,583,399 1,156,955
Net income for common stock         173,201 86,966
Other comprehensive loss, net of tax benefits (47)   (47)   (94) (94)
Common stock dividends         (21,000) (10,000)
Additional paid-in capital         130,752 287,790
Ending balance 1,866,258   1,521,617   1,866,258 1,521,617
Hawaii Electric Light | Reportable Legal Entities | Hawaiian Electric consolidated            
Increase (decrease) in stockholders' equity            
Beginning balance   276,332   243,964 276,332 243,964
Net income for common stock         18,909 9,296
Other comprehensive loss, net of tax benefits (4)   (4)   (8) (11)
Additional paid-in capital         43,024 267
Ending balance 338,257   253,516   338,257 253,516
Maui Electric | Reportable Legal Entities | Hawaiian Electric consolidated            
Increase (decrease) in stockholders' equity            
Beginning balance   298,459   282,876 298,459 282,876
Net income for common stock         14,145 5,537
Other comprehensive loss, net of tax benefits (9)   (9)   (21) (20)
Issuance of common stock, net of expenses         66,000  
Additional paid-in capital         43,024 191
Ending balance 421,607   288,584   421,607 288,584
Other subsidiaries | Reportable Legal Entities | Hawaiian Electric consolidated            
Increase (decrease) in stockholders' equity            
Beginning balance   $ 159,505   $ 153,574 159,505 153,574
Net income for common stock         3,082 2,659
Other comprehensive loss, net of tax benefits 0   0   0 0
Ending balance $ 162,587   $ 156,233   $ 162,587 $ 156,233