Basis of presentation (Tables)

6 Months Ended

Jun. 30, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of Impact of Prior Period Financial Statements of the Adoption of ASU 2017-07

The following table summarizes the impact to the prior period financial statements of the adoption of ASU No. 2017-07:



	Three months ended June 30, 2017									Six months ended June 30, 2017
(in thousands)	As previously filed			Adjustment from adoption of ASU No. 2017-07			As currently reported			As previously filed			Adjustment from adoption of ASU No. 2017-07			As currently reported
HEI Condensed Consolidated Income Statement
Expenses
Electric utility	$	501,828		$	(1,435	)	$	500,393		$	971,501		$	(2,858	)	$	968,643
Bank	50,533			(201		)	50,332			99,229			(396		)	98,833
Other	4,024			(270		)	3,754			9,355			(528		)	8,827
Total expenses	556,385			(1,906		)	554,479			1,080,085			(3,782		)	1,076,303
Operating income
Electric utility	55,047			1,435			56,482			103,985			2,858			106,843
Bank	24,796			201			24,997			48,956			396			49,352
Other	(3,947		)	270			(3,677		)	(9,183		)	528			(8,655		)
Total operating income	75,896			1,906			77,802			143,758			3,782			147,540
Retirement defined benefits expense--other than service costs	—			(1,906		)	(1,906		)	—			(3,782		)	(3,782		)
Hawaiian Electric Condensed Consolidated Income Statement
Other operation and maintenance	106,374			(1,435		)	104,939			206,614			(2,858		)	203,756
Total expense	501,828			(1,435		)	500,393			971,501			(2,858		)	968,643
Operating income	55,047			1,435			56,482			103,985			2,858			106,843
Retirement defined benefits expense--other than service costs	—			(1,435		)	(1,435		)	—			(2,858		)	(2,858		)
Hawaiian Electric Condensed Consolidating Income Statement (in Note 3)
Hawaiian Electric (parent only)
Other operation and maintenance	70,961			(1,302		)	69,659			138,239			(2,587		)	135,652
Total expense	357,575			(1,302		)	356,273			690,763			(2,587		)	688,176
Operating income	36,839			1,302			38,141			66,494			2,587			69,081
Retirement defined benefits expense--other than service costs	—			(1,302		)	(1,302		)	—			(2,587		)	(2,587		)
Hawaii Electric Light
Other operation and maintenance	17,558			85			17,643			33,074			168			33,242
Total expense	72,903			85			72,988			141,400			168			141,568
Operating income	8,807			(85		)	8,722			19,292			(168		)	19,124
Retirement defined benefits expense--other than service costs	—			85			85			—			168			168
Maui Electric
Other operation and maintenance	17,855			(218		)	17,637			35,301			(439		)	34,862
Total expense	71,350			(218		)	71,132			139,338			(439		)	138,899
Operating income	9,415			218			9,633			18,220			439			18,659
Retirement defined benefits expense--other than service costs	—			(218		)	(218		)	—			(439		)	(439		)
ASB Statements of Income Data (in Note 4)
Compensation and employee benefits	24,742			(201		)	24,541			47,979			(396		)	47,583
Other expense	4,705			201			4,906			9,016			396			9,412