Bank segment (HEI only) Deposit Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Weighted-average stated rate
Savings (as a percent)	0.06%	0.06%
Other checking, interest bearing (as a percent)	0.02%	0.02%
Money market (as a percent)	0.12%	0.13%
Term certificates (as a percent)	0.83%	0.80%
Total weighted-average stated rate (as a percent)	0.11%	0.11%
Deposit liabilities
Savings	$ 1,923,062	$ 1,826,907
Other checking
Interest-bearing	768,787	721,700
Noninterest-bearing	665,005	643,628
Commercial checking	677,789	570,790
Money market	158,010	182,546
Term certificates	430,762	426,906
Total Amount	4,623,415	4,372,477
Certificate accounts of $100,000 or more	120,000	102,000
Term certificates outstanding, scheduled maturities
2015	255,896
2016	55,614
2017	44,315
2018	16,949
2019	54,979
Thereafter	3,009
Total	430,762
Interest expense on deposit liabilities by type of deposit
Term certificates	3,603	3,702	$ 4,865
Savings	1,134	1,052	1,128
Money market	214	232	319
Interest-bearing checking	126	106	111
Interest expense on deposit liabilities	$ 5,077	$ 5,092	$ 6,423