Consolidated Statements of Comprehensive Income (Parenthetical) - HECO - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Net gains (losses) arising during the period, taxes (benefits)	$ (20,907)	$ 3,892	$ (9,810)
Amortization of net loss, prior service gain and transition obligation included in net periodic benefit cost, tax benefits	8,247	3,512	7,317
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, (taxes) benefits	13,825	(5,610)	2,887
Hawaiian Electric Company, Inc. and Subsidiaries
Net gains (losses) arising during the period, taxes (benefits)	(21,868)	1,821	(9,024)
Amortization of net loss, prior service gain and transition obligation included in net periodic benefit cost, tax benefits	7,474	3,312	6,594
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, (taxes) benefits	$ 13,825	$ (5,610)	$ 2,887