Bank segment (HEI only) FHLB Advances (Details) $ in Thousands	Dec. 31, 2014 USD ($)
Weighted-average stated rate
2015 (as a percent)	0.00%
2016 (as a percent)	0.00%
2017 (as a percent)	4.28%
2018 (as a percent)	1.95%
2019 (as a percent)	0.00%
Thereafter (as a percent)	0.00%
Total weighted-average stated rate (as a percent)	3.12%
Due in
2015	$ 0
2016	0
2017	50,000
2018	50,000
2019	0
Thereafter	0
Total amount due	$ 100,000