Bank segment (HEI only) - Credit Risk Profile by Internally Assigned Grade for Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Credit risk profile by internally assigned grade for loans
Current year	$ 1,296,473	$ 1,325,112
One year prior of origination year	1,220,751	934,584
Two years prior of origination year	808,953	367,452
Three years prior of origination year	296,592	236,305
Four years prior of origination year	164,815	217,965
More than five years prior of origination year	1,077,705	1,119,478
Revolving loans	1,077,634	958,710
Converted to term loans	62,098	61,598
Total	6,005,021	5,221,204
30-59 days past due
Credit risk profile by internally assigned grade for loans
Total	5,959	5,703
60-89 days past due
Credit risk profile by internally assigned grade for loans
Total	2,343	2,749
Greater than 90 days
Credit risk profile by internally assigned grade for loans
Total	5,624	8,792
Consumer
Credit risk profile by internally assigned grade for loans
Current year	202,061	37,838
One year prior of origination year	21,885	15,889
Two years prior of origination year	5,733	30,679
Three years prior of origination year	8,132	11,506
Four years prior of origination year	604	352
More than five years prior of origination year	140	238
Revolving loans	10,956	13,044
Converted to term loans	5,198	4,420
Total	254,709	113,966
Conversion of debt	3,500
Consumer | Current
Credit risk profile by internally assigned grade for loans
Current year	199,574	37,563
One year prior of origination year	21,330	15,488
Two years prior of origination year	5,543	29,383
Three years prior of origination year	7,580	10,897
Four years prior of origination year	527	302
More than five years prior of origination year	140	238
Revolving loans	10,810	12,740
Converted to term loans	4,782	4,157
Total	250,286	110,768
Consumer | 30-59 days past due
Credit risk profile by internally assigned grade for loans
Current year	1,110	202
One year prior of origination year	287	181
Two years prior of origination year	65	517
Three years prior of origination year	239	234
Four years prior of origination year	30	15
More than five years prior of origination year	0	0
Revolving loans	81	156
Converted to term loans	167	70
Total	1,979	1,375
Consumer | 60-89 days past due
Credit risk profile by internally assigned grade for loans
Current year	756	59
One year prior of origination year	163	127
Two years prior of origination year	88	392
Three years prior of origination year	137	183
Four years prior of origination year	19	8
More than five years prior of origination year	0	0
Revolving loans	45	7
Converted to term loans	107	106
Total	1,315	882
Consumer | Greater than 90 days
Credit risk profile by internally assigned grade for loans
Current year	621	14
One year prior of origination year	105	93
Two years prior of origination year	37	387
Three years prior of origination year	176	192
Four years prior of origination year	28	27
More than five years prior of origination year	0	0
Revolving loans	20	141
Converted to term loans	142	87
Total	1,129	941
Commercial
Credit risk profile by internally assigned grade for loans
Current year	243,174	266,554
One year prior of origination year	187,318	124,483
Two years prior of origination year	85,621	93,137
Three years prior of origination year	71,839	58,476
Four years prior of origination year	47,488	35,915
More than five years prior of origination year	57,686	78,497
Revolving loans	71,540	119,059
Converted to term loans	15,025	17,183
Total	779,691	793,304
Conversion of debt	1,900
Commercial | 30-59 days past due
Credit risk profile by internally assigned grade for loans
Total	614	700
Commercial | 60-89 days past due
Credit risk profile by internally assigned grade for loans
Total	18	313
Commercial | Greater than 90 days
Credit risk profile by internally assigned grade for loans
Total	77	48
Pass | Commercial
Credit risk profile by internally assigned grade for loans
Current year	239,852	266,087
One year prior of origination year	185,013	96,963
Two years prior of origination year	85,220	79,329
Three years prior of origination year	68,161	56,497
Four years prior of origination year	46,142	31,019
More than five years prior of origination year	53,192	66,570
Revolving loans	60,871	96,673
Converted to term loans	13,964	15,510
Total	752,415	708,648
Special Mention | Commercial
Credit risk profile by internally assigned grade for loans
Current year	0	40
One year prior of origination year	0	27,336
Two years prior of origination year	0	10,071
Three years prior of origination year	2,374	202
Four years prior of origination year	0	439
More than five years prior of origination year	645	8,966
Revolving loans	9,005	15,303
Converted to term loans	8	18
Total	12,032	62,375
Substandard | Commercial
Credit risk profile by internally assigned grade for loans
Current year	3,322	427
One year prior of origination year	2,305	184
Two years prior of origination year	401	3,737
Three years prior of origination year	1,304	1,777
Four years prior of origination year	1,346	4,457
More than five years prior of origination year	3,849	2,961
Revolving loans	1,664	7,083
Converted to term loans	1,053	1,655
Total	15,244	22,281
Doubtful | Commercial
Credit risk profile by internally assigned grade for loans
Current year	0	0
One year prior of origination year	0	0
Two years prior of origination year	0	0
Three years prior of origination year	0	0
Four years prior of origination year	0	0
More than five years prior of origination year	0	0
Revolving loans	0	0
Converted to term loans	0	0
Total	0	0
Residential 1-4 family | Real estate
Credit risk profile by internally assigned grade for loans
Current year	432,707	791,758
One year prior of origination year	755,056	461,683
Two years prior of origination year	423,723	136,332
Three years prior of origination year	113,096	65,230
Four years prior of origination year	53,117	124,994
More than five years prior of origination year	701,938	719,215
Revolving loans	0	0
Converted to term loans	0	0
Total	2,479,637	2,299,212
Residential 1-4 family | Real estate | Current
Credit risk profile by internally assigned grade for loans
Current year	432,707	791,758
One year prior of origination year	755,056	461,683
Two years prior of origination year	423,455	133,345
Three years prior of origination year	113,096	64,421
Four years prior of origination year	51,860	124,994
More than five years prior of origination year	698,354	712,452
Revolving loans	0	0
Converted to term loans	0	0
Total	2,474,528	2,288,653
Residential 1-4 family | Real estate | 30-59 days past due
Credit risk profile by internally assigned grade for loans
Current year	0	0
One year prior of origination year	0	0
Two years prior of origination year	0	0
Three years prior of origination year	0	809
Four years prior of origination year	448	0
More than five years prior of origination year	1,098	2,210
Revolving loans	0	0
Converted to term loans	0	0
Total	1,546	3,019
Residential 1-4 family | Real estate | 60-89 days past due
Credit risk profile by internally assigned grade for loans
Current year	0	0
One year prior of origination year	0	0
Two years prior of origination year	268	0
Three years prior of origination year	0	0
Four years prior of origination year	0	0
More than five years prior of origination year	90	1,468
Revolving loans	0	0
Converted to term loans	0	0
Total	358	1,468
Residential 1-4 family | Real estate | Greater than 90 days
Credit risk profile by internally assigned grade for loans
Current year	0	0
One year prior of origination year	0	0
Two years prior of origination year	0	2,987
Three years prior of origination year	0	0
Four years prior of origination year	809	0
More than five years prior of origination year	2,396	3,085
Revolving loans	0	0
Converted to term loans	0	0
Total	3,205	6,072
Home equity  line of credit
Credit risk profile by internally assigned grade for loans
Conversion of debt	15,600
Home equity  line of credit | Real estate
Credit risk profile by internally assigned grade for loans
Current year	0	0
One year prior of origination year	0	0
Two years prior of origination year	0	0
Three years prior of origination year	0	0
Four years prior of origination year	0	0
More than five years prior of origination year	0	0
Revolving loans	961,030	795,668
Converted to term loans	41,875	39,995
Total	1,002,905	835,663
Home equity  line of credit | Real estate | Current
Credit risk profile by internally assigned grade for loans
Current year	0	0
One year prior of origination year	0	0
Two years prior of origination year	0	0
Three years prior of origination year	0	0
Four years prior of origination year	0	0
More than five years prior of origination year	0	0
Revolving loans	959,131	794,518
Converted to term loans	40,814	39,116
Total	999,945	833,634
Home equity  line of credit | Real estate | 30-59 days past due
Credit risk profile by internally assigned grade for loans
Current year	0	0
One year prior of origination year	0	0
Two years prior of origination year	0	0
Three years prior of origination year	0	0
Four years prior of origination year	0	0
More than five years prior of origination year	0	0
Revolving loans	1,103	296
Converted to term loans	209	313
Total	1,312	609
Home equity  line of credit | Real estate | 60-89 days past due
Credit risk profile by internally assigned grade for loans
Current year	0	0
One year prior of origination year	0	0
Two years prior of origination year	0	0
Three years prior of origination year	0	0
Four years prior of origination year	0	0
More than five years prior of origination year	0	0
Revolving loans	209	16
Converted to term loans	226	70
Total	435	86
Home equity  line of credit | Real estate | Greater than 90 days
Credit risk profile by internally assigned grade for loans
Current year	0	0
One year prior of origination year	0	0
Two years prior of origination year	0	0
Three years prior of origination year	0	0
Four years prior of origination year	0	0
More than five years prior of origination year	0	0
Revolving loans	587	838
Converted to term loans	626	496
Total	1,213	1,334
Residential land | Real estate
Credit risk profile by internally assigned grade for loans
Current year	5,245	10,572
One year prior of origination year	9,010	6,794
Two years prior of origination year	5,222	1,116
Three years prior of origination year	203	532
Four years prior of origination year	522	267
More than five years prior of origination year	477	578
Revolving loans	0	0
Converted to term loans	0	0
Total	20,679	19,859
Residential land | Real estate | Current
Credit risk profile by internally assigned grade for loans
Current year	5,245	10,572
One year prior of origination year	9,010	6,794
Two years prior of origination year	5,222	1,116
Three years prior of origination year	203	532
Four years prior of origination year	522	267
More than five years prior of origination year	477	181
Revolving loans	0	0
Converted to term loans	0	0
Total	20,679	19,462
Residential land | Real estate | 30-59 days past due
Credit risk profile by internally assigned grade for loans
Current year	0	0
One year prior of origination year	0	0
Two years prior of origination year	0	0
Three years prior of origination year	0	0
Four years prior of origination year	0	0
More than five years prior of origination year	0	0
Revolving loans	0	0
Converted to term loans	0	0
Total	0	0
Residential land | Real estate | 60-89 days past due
Credit risk profile by internally assigned grade for loans
Current year	0	0
One year prior of origination year	0	0
Two years prior of origination year	0	0
Three years prior of origination year	0	0
Four years prior of origination year	0	0
More than five years prior of origination year	0	0
Revolving loans	0	0
Converted to term loans	0	0
Total	0	0
Residential land | Real estate | Greater than 90 days
Credit risk profile by internally assigned grade for loans
Current year	0	0
One year prior of origination year	0	0
Two years prior of origination year	0	0
Three years prior of origination year	0	0
Four years prior of origination year	0	0
More than five years prior of origination year	0	397
Revolving loans	0	0
Converted to term loans	0	0
Total	0	397
Residential construction | Real estate
Credit risk profile by internally assigned grade for loans
Current year	7,986	7,856
One year prior of origination year	11,624	3,019
Two years prior of origination year	1,178	0
Three years prior of origination year	0	0
Four years prior of origination year	0	263
More than five years prior of origination year	0	0
Revolving loans	0	0
Converted to term loans	0	0
Total	20,788	11,138
Residential construction | Real estate | Current
Credit risk profile by internally assigned grade for loans
Current year	7,986	7,856
One year prior of origination year	11,624	3,019
Two years prior of origination year	1,178	0
Three years prior of origination year	0	0
Four years prior of origination year	0	263
More than five years prior of origination year	0	0
Revolving loans	0	0
Converted to term loans	0	0
Total	20,788	11,138
Residential construction | Real estate | 30-59 days past due
Credit risk profile by internally assigned grade for loans
Current year	0	0
One year prior of origination year	0	0
Two years prior of origination year	0	0
Three years prior of origination year	0	0
Four years prior of origination year	0	0
More than five years prior of origination year	0	0
Revolving loans	0	0
Converted to term loans	0	0
Total	0	0
Residential construction | Real estate | 60-89 days past due
Credit risk profile by internally assigned grade for loans
Current year	0	0
One year prior of origination year	0	0
Two years prior of origination year	0	0
Three years prior of origination year	0	0
Four years prior of origination year	0	0
More than five years prior of origination year	0	0
Revolving loans	0	0
Converted to term loans	0	0
Total	0	0
Residential construction | Real estate | Greater than 90 days
Credit risk profile by internally assigned grade for loans
Current year	0	0
One year prior of origination year	0	0
Two years prior of origination year	0	0
Three years prior of origination year	0	0
Four years prior of origination year	0	0
More than five years prior of origination year	0	0
Revolving loans	0	0
Converted to term loans	0	0
Total	0	0
Commercial real estate | Real estate
Credit risk profile by internally assigned grade for loans
Current year	390,206	193,394
One year prior of origination year	188,380	279,455
Two years prior of origination year	287,432	106,188
Three years prior of origination year	103,322	89,219
Four years prior of origination year	63,084	56,174
More than five years prior of origination year	317,464	320,950
Revolving loans	8,235	11,602
Converted to term loans	0	0
Total	1,358,123	1,056,982
Commercial real estate | Real estate | 30-59 days past due
Credit risk profile by internally assigned grade for loans
Total	508	0
Commercial real estate | Real estate | 60-89 days past due
Credit risk profile by internally assigned grade for loans
Total	217	0
Commercial real estate | Real estate | Greater than 90 days
Credit risk profile by internally assigned grade for loans
Total	0	0
Commercial real estate | Pass | Real estate
Credit risk profile by internally assigned grade for loans
Current year	390,206	173,794
One year prior of origination year	177,130	275,242
Two years prior of origination year	283,321	49,317
Three years prior of origination year	51,542	56,490
Four years prior of origination year	63,084	33,581
More than five years prior of origination year	278,280	259,583
Revolving loans	8,235	11,602
Converted to term loans	0	0
Total	1,251,798	859,609
Commercial real estate | Special Mention | Real estate
Credit risk profile by internally assigned grade for loans
Current year	0	19,600
One year prior of origination year	11,250	3,529
Two years prior of origination year	3,446	42,935
Three years prior of origination year	40,423	30,870
Four years prior of origination year	0	20,788
More than five years prior of origination year	24,466	32,824
Revolving loans	0	0
Converted to term loans	0	0
Total	79,585	150,546
Commercial real estate | Substandard | Real estate
Credit risk profile by internally assigned grade for loans
Current year	0	0
One year prior of origination year	0	684
Two years prior of origination year	665	13,936
Three years prior of origination year	11,357	1,859
Four years prior of origination year	0	1,805
More than five years prior of origination year	14,718	28,543
Revolving loans	0	0
Converted to term loans	0	0
Total	26,740	46,827
Commercial real estate | Doubtful | Real estate
Credit risk profile by internally assigned grade for loans
Current year	0	0
One year prior of origination year	0	0
Two years prior of origination year	0	0
Three years prior of origination year	0	0
Four years prior of origination year	0	0
More than five years prior of origination year	0	0
Revolving loans	0	0
Converted to term loans	0	0
Total	0	0
Commercial construction | Real estate
Credit risk profile by internally assigned grade for loans
Current year	15,094	17,140
One year prior of origination year	47,478	43,261
Two years prior of origination year	44	0
Three years prior of origination year	0	11,342
Four years prior of origination year	0	0
More than five years prior of origination year	0	0
Revolving loans	25,873	19,337
Converted to term loans	0	0
Total	88,489	91,080
Commercial construction | Real estate | 30-59 days past due
Credit risk profile by internally assigned grade for loans
Total	0	0
Commercial construction | Real estate | 60-89 days past due
Credit risk profile by internally assigned grade for loans
Total	0	0
Commercial construction | Real estate | Greater than 90 days
Credit risk profile by internally assigned grade for loans
Total	0	0
Commercial construction | Pass | Real estate
Credit risk profile by internally assigned grade for loans
Current year	15,094	17,140
One year prior of origination year	47,478	43,261
Two years prior of origination year	44	0
Three years prior of origination year	0	11,342
Four years prior of origination year	0	0
More than five years prior of origination year	0	0
Revolving loans	25,873	19,337
Converted to term loans	0	0
Total	88,489	91,080
Commercial construction | Special Mention | Real estate
Credit risk profile by internally assigned grade for loans
Current year	0	0
One year prior of origination year	0	0
Two years prior of origination year	0	0
Three years prior of origination year	0	0
Four years prior of origination year	0	0
More than five years prior of origination year	0	0
Revolving loans	0	0
Converted to term loans	0	0
Total	0	0
Commercial construction | Substandard | Real estate
Credit risk profile by internally assigned grade for loans
Current year	0	0
One year prior of origination year	0	0
Two years prior of origination year	0	0
Three years prior of origination year	0	0
Four years prior of origination year	0	0
More than five years prior of origination year	0	0
Revolving loans	0	0
Converted to term loans	0	0
Total	0	0
Commercial construction | Doubtful | Real estate
Credit risk profile by internally assigned grade for loans
Current year	0	0
One year prior of origination year	0	0
Two years prior of origination year	0	0
Three years prior of origination year	0	0
Four years prior of origination year	0	0
More than five years prior of origination year	0	0
Revolving loans	0	0
Converted to term loans	0	0
Total	$ 0	$ 0