Bank segment (HEI only) Carrying Amount of Impaired Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Recorded investment:
With no related allowance recorded	$ 19,806	$ 23,167
With an allowance recorded	33,879	26,679
Recorded investment	53,685	49,846
Unpaid principal balance:
With no related allowance recorded	22,934	28,890
With an allowance recorded	34,696	27,119
Unpaid principal balance	57,630	56,009
Related Allowance	6,320	4,665
Average recorded investment:
With no related allowance recorded	19,651	17,592
With an allowance recorded	31,732	30,882
Average recorded investment	51,383	48,474
Interest income recognized:
With no related allowance recorded	704	442
With an allowance recorded	1,140	1,825
Interest income recognized	1,844	2,267
Residential 1-4 family
Recorded investment:
With no related allowance recorded	10,596	11,654
With an allowance recorded	11,861	11,327
Recorded investment	22,457	22,981
Unpaid principal balance:
With no related allowance recorded	11,805	12,987
With an allowance recorded	11,914	11,347
Unpaid principal balance	23,719	24,334
Related Allowance	1,453	951
Average recorded investment:
With no related allowance recorded	11,215	9,056
With an allowance recorded	11,578	8,822
Average recorded investment	22,793	17,878
Interest income recognized:
With no related allowance recorded	332	227
With an allowance recorded	562	419
Interest income recognized	894	646
Commercial real estate
Recorded investment:
With no related allowance recorded	1,188	571
With an allowance recorded	0	4,541
Recorded investment	1,188	5,112
Unpaid principal balance:
With no related allowance recorded	1,436	626
With an allowance recorded	0	4,541
Unpaid principal balance	1,436	5,167
Related Allowance	0	1,845
Average recorded investment:
With no related allowance recorded	370	194
With an allowance recorded	1,699	3,415
Average recorded investment	2,069	3,609
Interest income recognized:
With no related allowance recorded	74	0
With an allowance recorded	0	478
Interest income recognized	74	478
Home equity line of credit
Recorded investment:
With no related allowance recorded	707	363
With an allowance recorded	2,518	416
Recorded investment	3,225	779
Unpaid principal balance:
With no related allowance recorded	948	606
With an allowance recorded	2,579	420
Unpaid principal balance	3,527	1,026
Related Allowance	442	46
Average recorded investment:
With no related allowance recorded	484	402
With an allowance recorded	1,597	132
Average recorded investment	2,081	534
Interest income recognized:
With no related allowance recorded	4	5
With an allowance recorded	49	6
Interest income recognized	53	11
Residential land
Recorded investment:
With no related allowance recorded	1,644	2,344
With an allowance recorded	4,039	5,506
Recorded investment	5,683	7,850
Unpaid principal balance:
With no related allowance recorded	2,412	3,200
With an allowance recorded	4,117	5,584
Unpaid principal balance	6,529	8,784
Related Allowance	891	1,057
Average recorded investment:
With no related allowance recorded	2,397	2,728
With an allowance recorded	4,337	6,415
Average recorded investment	6,734	9,143
Interest income recognized:
With no related allowance recorded	137	172
With an allowance recorded	318	484
Interest income recognized	455	656
Commercial construction
Recorded investment:
With no related allowance recorded	0	0
With an allowance recorded	0	0
Recorded investment	0	0
Unpaid principal balance:
With no related allowance recorded	0	0
With an allowance recorded	0	0
Unpaid principal balance	0	0
Related Allowance	0	0
Average recorded investment:
With no related allowance recorded	0	0
With an allowance recorded	0	0
Average recorded investment	0	0
Interest income recognized:
With no related allowance recorded	0	0
With an allowance recorded	0	0
Interest income recognized	0	0
Residential construction
Recorded investment:
With no related allowance recorded	0	0
With an allowance recorded	0	0
Recorded investment	0	0
Unpaid principal balance:
With no related allowance recorded	0	0
With an allowance recorded	0	0
Unpaid principal balance	0	0
Related Allowance	0	0
Average recorded investment:
With no related allowance recorded	0	0
With an allowance recorded	0	0
Average recorded investment	0	0
Interest income recognized:
With no related allowance recorded	0	0
With an allowance recorded	0	0
Interest income recognized	0	0
Commercial loans
Recorded investment:
With no related allowance recorded	5,671	8,235
With an allowance recorded	15,448	4,873
Recorded investment	21,119	13,108
Unpaid principal balance:
With no related allowance recorded	6,333	11,471
With an allowance recorded	16,073	5,211
Unpaid principal balance	22,406	16,682
Related Allowance	3,527	760
Average recorded investment:
With no related allowance recorded	5,185	5,204
With an allowance recorded	12,507	12,089
Average recorded investment	17,692	17,293
Interest income recognized:
With no related allowance recorded	157	38
With an allowance recorded	211	438
Interest income recognized	368	476
Consumer loans
Recorded investment:
With no related allowance recorded	0	0
With an allowance recorded	13	16
Recorded investment	13	16
Unpaid principal balance:
With no related allowance recorded	0	0
With an allowance recorded	13	16
Unpaid principal balance	13	16
Related Allowance	7	6
Average recorded investment:
With no related allowance recorded	0	8
With an allowance recorded	14	9
Average recorded investment	14	17
Interest income recognized:
With no related allowance recorded	0	0
With an allowance recorded	0	0
Interest income recognized	$ 0	$ 0