Bank segment (HEI only) Allowance For Loan Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Allowance for loan losses:
Valuation allowance, balance at the beginning of the period	$ 45,618	$ 40,116
Charge-offs	(6,426)	(5,550)
Recoveries	4,571	4,926
Provision	6,275	6,126
Valuation allowance, balance at the end of the period	50,038	45,618
Ending balance: individually evaluated for impairment	6,320	4,665
Ending balance: collectively evaluated for impairment	43,718	40,953
Financing Receivables:
Total financing receivables	4,622,068	4,440,989
Ending balance: individually evaluated for impairment	53,685	49,846
Ending balance: collectively evaluated for impairment	4,568,383	4,391,143
Residential 1-4 family
Allowance for loan losses:
Valuation allowance, balance at the beginning of the period	4,662	5,534
Charge-offs	(356)	(987)
Recoveries	226	1,180
Provision	(346)	(1,065)
Valuation allowance, balance at the end of the period	4,186	4,662
Ending balance: individually evaluated for impairment	1,453	951
Ending balance: collectively evaluated for impairment	2,733	3,711
Financing Receivables:
Total financing receivables	2,069,665	2,044,205
Ending balance: individually evaluated for impairment	22,457	22,981
Ending balance: collectively evaluated for impairment	2,047,208	2,021,224
Commercial real estate
Allowance for loan losses:
Valuation allowance, balance at the beginning of the period	8,954	5,059
Provision	2,388	3,895
Valuation allowance, balance at the end of the period	11,342	8,954
Ending balance: individually evaluated for impairment	0	1,845
Ending balance: collectively evaluated for impairment	11,342	7,109
Financing Receivables:
Total financing receivables	690,561	531,917
Ending balance: individually evaluated for impairment	1,188	5,112
Ending balance: collectively evaluated for impairment	689,373	526,805
Home equity line of credit
Allowance for loan losses:
Valuation allowance, balance at the beginning of the period	6,982	5,229
Charge-offs	(205)	(196)
Recoveries	80	752
Provision	403	1,197
Valuation allowance, balance at the end of the period	7,260	6,982
Ending balance: individually evaluated for impairment	442	46
Ending balance: collectively evaluated for impairment	6,818	6,936
Financing Receivables:
Total financing receivables	846,294	818,815
Ending balance: individually evaluated for impairment	3,225	779
Ending balance: collectively evaluated for impairment	843,069	818,036
Residential land
Allowance for loan losses:
Valuation allowance, balance at the beginning of the period	1,875	1,817
Charge-offs	0	(81)
Recoveries	507	469
Provision	(711)	(330)
Valuation allowance, balance at the end of the period	1,671	1,875
Ending balance: individually evaluated for impairment	891	1,057
Ending balance: collectively evaluated for impairment	780	818
Financing Receivables:
Total financing receivables	18,229	16,240
Ending balance: individually evaluated for impairment	5,683	7,850
Ending balance: collectively evaluated for impairment	12,546	8,390
Commercial construction
Allowance for loan losses:
Valuation allowance, balance at the beginning of the period	5,471	2,397
Provision	(1,010)	3,074
Valuation allowance, balance at the end of the period	4,461	5,471
Ending balance: collectively evaluated for impairment	4,461	5,471
Financing Receivables:
Total financing receivables	100,796	96,438
Ending balance: collectively evaluated for impairment	100,796	96,438
Residential construction
Allowance for loan losses:
Valuation allowance, balance at the beginning of the period	28	19
Provision	(15)	9
Valuation allowance, balance at the end of the period	13	28
Ending balance: collectively evaluated for impairment	13	28
Financing Receivables:
Total financing receivables	14,089	18,961
Ending balance: collectively evaluated for impairment	14,089	18,961
Commercial loans
Allowance for loan losses:
Valuation allowance, balance at the beginning of the period	14,017	15,803
Charge-offs	(1,074)	(1,872)
Recoveries	2,773	1,636
Provision	1,492	(1,550)
Valuation allowance, balance at the end of the period	17,208	14,017
Ending balance: individually evaluated for impairment	3,527	760
Ending balance: collectively evaluated for impairment	13,681	13,257
Financing Receivables:
Total financing receivables	758,659	791,757
Ending balance: individually evaluated for impairment	21,119	13,108
Ending balance: collectively evaluated for impairment	737,540	778,649
Consumer loans
Allowance for loan losses:
Valuation allowance, balance at the beginning of the period	3,629	2,367
Charge-offs	(4,791)	(2,414)
Recoveries	985	889
Provision	4,074	2,787
Valuation allowance, balance at the end of the period	3,897	3,629
Ending balance: individually evaluated for impairment	7	6
Ending balance: collectively evaluated for impairment	3,890	3,623
Financing Receivables:
Total financing receivables	123,775	122,656
Ending balance: individually evaluated for impairment	13	16
Ending balance: collectively evaluated for impairment	123,762	122,640
Unallocated
Allowance for loan losses:
Valuation allowance, balance at the beginning of the period	$ 0	1,891
Provision		(1,891)
Valuation allowance, balance at the end of the period	$ 0	0
Ending balance: collectively evaluated for impairment	$ 0	$ 0