Shareholders' equity (Tables)

9 Months Ended

Sep. 30, 2021

Equity [Abstract]

Schedule of accumulated other comprehensive income

Changes in the balances of each component of accumulated other comprehensive income/(loss) (AOCI) were as follows:

	HEI Consolidated								Hawaiian Electric Consolidated
(in thousands)	Net unrealized gains (losses) on securities		Unrealized gains (losses) on derivatives		Retirement benefit plans		AOCI		AOCI-Retirement benefit plans
Balance, December 31, 2020	$	19,986	$	(3,363)	$	(17,887)	$	(1,264)	$	(2,919)
Current period other comprehensive income (loss)	(40,308)		1,009		450		(38,849)		175
Balance, September 30, 2021	$	(20,322)	$	(2,354)	$	(17,437)	$	(40,113)	$	(2,744)
Balance, December 31, 2019	$	2,481	$	(1,613)	$	(20,907)	$	(20,039)	$	(1,279)
Current period other comprehensive income (loss)	19,767		(2,129)		1,682		19,320		99
Balance, September 30, 2020	$	22,248	$	(3,742)	$	(19,225)	$	(719)	$	(1,180)

Schedule of reclassifications out of accumulated other comprehensive income/(loss)

Reclassifications out of AOCI were as follows:

	Amount reclassified from AOCI								Affected line item in the  Statements of Income / Balance Sheets
	Three months ended September 30				Nine months ended September 30
	2021		2020		2021		2020
(in thousands)
HEI consolidated
Net realized gains on securities included in net income	$	—	$	—	$	(387)	$	(1,638)	Gain on sale of investment securities, net
Net realized losses on derivatives qualifying as cash flow hedges	9		—		9		—		Interest expense
Retirement benefit plans:
Amortization of prior service credit and net losses recognized during the period in net periodic benefit cost	2,853		6,324		14,871		17,720		See Note 8 for additional details
Impact of D&Os of the PUC included in regulatory assets	(2,799)		(5,721)		(14,421)		(16,038)		See Note 8 for additional details
Total reclassifications	$	63	$	603	$	72	$	44
Hawaiian Electric consolidated
Retirement benefit plans:
Amortization of prior service credit and net losses recognized during the period in net periodic benefit cost	$	2,905	$	5,769	$	14,596	$	16,137	See Note 8 for additional details
Impact of D&Os of the PUC included in regulatory assets	(2,799)		(5,721)		(14,421)		(16,038)		See Note 8 for additional details
Total reclassifications	$	106	$	48	$	175	$	99