Shareholders' equity (Tables)

3 Months Ended

Mar. 31, 2019

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, 2018	$	(24,423	)	$	(436	)	$	(25,751	)	$	(50,610	)	$	99
Current period other comprehensive income (loss)	9,439			(403		)	205			9,241			24
Balance, March 31, 2019	$	(14,984	)	$	(839	)	$	(25,546	)	$	(41,369	)	$	123
Balance, December 31, 2017	$	(14,951	)	$	—		$	(26,990	)	$	(41,941	)	$	(1,219	)
Current period other comprehensive income (loss)	(13,297		)	—			524			(12,773		)	31
Balance, March 31, 2018	$	(28,248	)	$	—		$	(26,466	)	$	(54,714	)	$	(1,188	)

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

Reclassifications out of AOCI were as follows:

	Amount reclassified from AOCI
	Three months ended March 31						Affected line item in the
(in thousands)	2019			2018			Statements of Income / Balance Sheets
HEI consolidated
Retirement benefit plans:
Amortization of prior service credit and net losses recognized during the period in net periodic benefit cost	$	2,503		$	5,146		See Note 9 for additional details
Impact of D&Os of the PUC included in regulatory assets	(2,298		)	(4,622		)	See Note 9 for additional details
Total reclassifications	$	205		$	524
Hawaiian Electric consolidated
Retirement benefit plans:
Amortization of prior service credit and net losses recognized during the period in net periodic benefit cost	$	2,322		$	4,653		See Note 9 for additional details
Impact of D&Os of the PUC included in regulatory assets	(2,298		)	(4,622		)	See Note 9 for additional details
Total reclassifications	$	24		$	31