Bank segment (HEI only) - Credit Risk Profile Based on Payment Activity for Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Credit risk profile based on payment activity for loans
Total financing receivables	$ 6,005,021	$ 5,221,204
Recorded investment> 90 days and accruing	0	0
Commercial
Credit risk profile based on payment activity for loans
Total financing receivables	779,691	793,304
Recorded investment> 90 days and accruing	0	0
Consumer
Credit risk profile based on payment activity for loans
Total financing receivables	254,709	113,966
Recorded investment> 90 days and accruing	0	0
Residential 1-4 family | Real estate
Credit risk profile based on payment activity for loans
Total financing receivables	2,479,637	2,299,212
Recorded investment> 90 days and accruing	0	0
Commercial real estate | Real estate
Credit risk profile based on payment activity for loans
Total financing receivables	1,358,123	1,056,982
Recorded investment> 90 days and accruing	0	0
Home equity  line of credit | Real estate
Credit risk profile based on payment activity for loans
Total financing receivables	1,002,905	835,663
Recorded investment> 90 days and accruing	0	0
Residential land | Real estate
Credit risk profile based on payment activity for loans
Total financing receivables	20,679	19,859
Recorded investment> 90 days and accruing	0	0
Commercial construction | Real estate
Credit risk profile based on payment activity for loans
Total financing receivables	88,489	91,080
Recorded investment> 90 days and accruing	0	0
Residential construction | Real estate
Credit risk profile based on payment activity for loans
Total financing receivables	20,788	11,138
Recorded investment> 90 days and accruing	0	0
30-59 days past due
Credit risk profile based on payment activity for loans
Total financing receivables	5,959	5,703
30-59 days past due | Commercial
Credit risk profile based on payment activity for loans
Total financing receivables	614	700
30-59 days past due | Consumer
Credit risk profile based on payment activity for loans
Total financing receivables	1,979	1,375
30-59 days past due | Residential 1-4 family | Real estate
Credit risk profile based on payment activity for loans
Total financing receivables	1,546	3,019
30-59 days past due | Commercial real estate | Real estate
Credit risk profile based on payment activity for loans
Total financing receivables	508	0
30-59 days past due | Home equity  line of credit | Real estate
Credit risk profile based on payment activity for loans
Total financing receivables	1,312	609
30-59 days past due | Residential land | Real estate
Credit risk profile based on payment activity for loans
Total financing receivables	0	0
30-59 days past due | Commercial construction | Real estate
Credit risk profile based on payment activity for loans
Total financing receivables	0	0
30-59 days past due | Residential construction | Real estate
Credit risk profile based on payment activity for loans
Total financing receivables	0	0
60-89 days past due
Credit risk profile based on payment activity for loans
Total financing receivables	2,343	2,749
60-89 days past due | Commercial
Credit risk profile based on payment activity for loans
Total financing receivables	18	313
60-89 days past due | Consumer
Credit risk profile based on payment activity for loans
Total financing receivables	1,315	882
60-89 days past due | Residential 1-4 family | Real estate
Credit risk profile based on payment activity for loans
Total financing receivables	358	1,468
60-89 days past due | Commercial real estate | Real estate
Credit risk profile based on payment activity for loans
Total financing receivables	217	0
60-89 days past due | Home equity  line of credit | Real estate
Credit risk profile based on payment activity for loans
Total financing receivables	435	86
60-89 days past due | Residential land | Real estate
Credit risk profile based on payment activity for loans
Total financing receivables	0	0
60-89 days past due | Commercial construction | Real estate
Credit risk profile based on payment activity for loans
Total financing receivables	0	0
60-89 days past due | Residential construction | Real estate
Credit risk profile based on payment activity for loans
Total financing receivables	0	0
Greater than 90 days
Credit risk profile based on payment activity for loans
Total financing receivables	5,624	8,792
Greater than 90 days | Commercial
Credit risk profile based on payment activity for loans
Total financing receivables	77	48
Greater than 90 days | Consumer
Credit risk profile based on payment activity for loans
Total financing receivables	1,129	941
Greater than 90 days | Residential 1-4 family | Real estate
Credit risk profile based on payment activity for loans
Total financing receivables	3,205	6,072
Greater than 90 days | Commercial real estate | Real estate
Credit risk profile based on payment activity for loans
Total financing receivables	0	0
Greater than 90 days | Home equity  line of credit | Real estate
Credit risk profile based on payment activity for loans
Total financing receivables	1,213	1,334
Greater than 90 days | Residential land | Real estate
Credit risk profile based on payment activity for loans
Total financing receivables	0	397
Greater than 90 days | Commercial construction | Real estate
Credit risk profile based on payment activity for loans
Total financing receivables	0	0
Greater than 90 days | Residential construction | Real estate
Credit risk profile based on payment activity for loans
Total financing receivables	0	0
Total past due
Credit risk profile based on payment activity for loans
Total financing receivables	13,926	17,244
Total past due | Commercial
Credit risk profile based on payment activity for loans
Total financing receivables	709	1,061
Total past due | Consumer
Credit risk profile based on payment activity for loans
Total financing receivables	4,423	3,198
Total past due | Residential 1-4 family | Real estate
Credit risk profile based on payment activity for loans
Total financing receivables	5,109	10,559
Total past due | Commercial real estate | Real estate
Credit risk profile based on payment activity for loans
Total financing receivables	725	0
Total past due | Home equity  line of credit | Real estate
Credit risk profile based on payment activity for loans
Total financing receivables	2,960	2,029
Total past due | Residential land | Real estate
Credit risk profile based on payment activity for loans
Total financing receivables	0	397
Total past due | Commercial construction | Real estate
Credit risk profile based on payment activity for loans
Total financing receivables	0	0
Total past due | Residential construction | Real estate
Credit risk profile based on payment activity for loans
Total financing receivables	0	0
Current
Credit risk profile based on payment activity for loans
Total financing receivables	5,991,095	5,203,960
Current | Commercial
Credit risk profile based on payment activity for loans
Total financing receivables	778,982	792,243
Current | Consumer
Credit risk profile based on payment activity for loans
Total financing receivables	250,286	110,768
Current | Residential 1-4 family | Real estate
Credit risk profile based on payment activity for loans
Total financing receivables	2,474,528	2,288,653
Current | Commercial real estate | Real estate
Credit risk profile based on payment activity for loans
Total financing receivables	1,357,398	1,056,982
Current | Home equity  line of credit | Real estate
Credit risk profile based on payment activity for loans
Total financing receivables	999,945	833,634
Current | Residential land | Real estate
Credit risk profile based on payment activity for loans
Total financing receivables	20,679	19,462
Current | Commercial construction | Real estate
Credit risk profile based on payment activity for loans
Total financing receivables	88,489	91,080
Current | Residential construction | Real estate
Credit risk profile based on payment activity for loans
Total financing receivables	$ 20,788	$ 11,138