Consolidated Statements of Comprehensive Income (Parenthetical) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Net unrealized gains (losses) on securities arising during the period, taxes	$ (3,856)	$ 9,037	$ (631)
Less: reclassification adjustment for net realized gains included in net income, taxes	1,132	488	53
Less: reclassification adjustment to net income, net of tax benefits of $150, $150 and $150 for 2014, 2013 and 2012, respectively	150	150	150
Net gains (losses) arising during the period, tax benefits	(149,364)	142,478	(63,303)
Less: amortization of net loss, prior service gain and transition obligation included in net periodic benefit cost, tax benefits	(7,245)	(14,870)	(9,764)
Less: reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of (taxes) benefits of ($132,373), $141,777 and ($48,299) for 2014, 2013 and 2012, respectively	(132,373)	141,777	(48,299)
Hawaiian Electric Company, Inc. and Subsidiaries
Net gains (losses) arising during the period, tax benefits	(139,236)	129,601	(57,375)
Less: amortization of net loss, prior service gain and transition obligation included in net periodic benefit cost, tax benefits	(6,504)	(13,180)	(8,709)
Less: reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of (taxes) benefits of ($132,373), $141,777 and ($48,299) for 2014, 2013 and 2012, respectively	$ (132,373)	$ 141,777	$ (48,069)