Retirement benefits - (Tables) - HECO

6 Months Ended

Jun. 30, 2012

Retirement benefits

Schedule of components of net periodic benefit cost for consolidated HECO

	Three months ended June 30												Six months ended June 30
	Pension benefits						Other benefits						Pension benefits						Other benefits
(in thousands)	2012			2011			2012			2011			2012			2011			2012			2011
Service cost	$	11,397		$	8,824		$	1,008		$	1,173		$	21,588		$	17,741		$	2,104		$	2,440
Interest cost	16,973			16,271			2,223			2,417			33,744			32,580			4,504			4,878
Expected return on plan assets	(17,736		)	(17,172		)	(2,557		)	(2,657		)	(35,592		)	(34,273		)	(5,178		)	(5,305		)
Amortization of net transition obligation	—			—			—			—			—			1			—			—
Amortization of prior service gain	(82		)	(97		)	(449		)	(309		)	(163		)	(194		)	(897		)	(533		)
Amortization of net actuarial loss	6,403			4,314			299			40			12,826			8,719			752			55
Net periodic benefit cost	16,955			12,140			524			664			32,403			24,574			1,285			1,535
Impact of PUC D&Os	(4,977		)	(556		)	(416		)	1,734			(8,834		)	(2,100		)	(1,096		)	2,752
Net periodic benefit cost (adjusted for impact of PUC D&Os)	$	11,978		$	11,584		$	108		$	2,398		$	23,569		$	22,474		$	189		$	4,287

Hawaiian Electric Company, Inc. and Subsidiaries

Retirement benefits

Schedule of components of net periodic benefit cost for consolidated HECO

	Three months ended June 30												Six months ended June 30
	Pension benefits						Other benefits						Pension benefits						Other benefits
(in thousands)	2012			2011			2012			2011			2012			2011			2012			2011
Service cost	$	11,000		$	8,474		$	959		$	1,129		$	20,802		$	17,039		$	2,007		$	2,352
Interest cost	15,465			14,803			2,147			2,340			30,726			29,652			4,352			4,724
Expected return on plan assets	(15,942		)	(15,352		)	(2,519		)	(2,618		)	(32,002		)	(30,636		)	(5,098		)	(5,226		)
Amortization of net transition obligation	—			—			(2		)	(2		)	—			—			(4		)	(4		)
Amortization of net prior service gain	(172		)	(187		)	(451		)	(312		)	(344		)	(374		)	(902		)	(539		)
Amortization of net actuarial loss	5,845			4,016			288			37			11,714			8,136			728			55
Net periodic benefit cost	16,196			11,754			422			574			30,896			23,817			1,083			1,362
Impact of PUC D&Os	(4,977		)	(556		)	(416		)	1,734			(8,834		)	(2,100		)	(1,096		)	2,752
Net periodic benefit cost (adjusted for impact of PUC D&Os)	$	11,219		$	11,198		$	6		$	2,308		$	22,062		$	21,717		$	(13	)	$	4,114