Bank segment (HEI only) - Loan Modifications (Details)	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022 USD ($) contract	Dec. 31, 2021 USD ($) contract
Loan modifications determined to be troubled debt restructurings
Number of contracts \| contract		9	24
Outstanding recorded investment		$ 4,312,000	$ 12,109,000
Related allowance		$ 703,000	$ 685,000
Number of contracts \| contract		0	2
Recorded investment		$ 0	$ 483,000
Commitments to borrowers whose loan terms are impaired or modified under troubled debt restructuring		$ 0
Residential 1-4 family
Loan modifications determined to be troubled debt restructurings
Number of contracts \| contract		5	14
Outstanding recorded investment		$ 1,475,000	$ 8,379,000
Related allowance		$ 164,000	$ 442,000
Number of contracts \| contract		0	1
Recorded investment		$ 0	$ 474,000
Commercial real estate
Loan modifications determined to be troubled debt restructurings
Number of contracts \| contract		0	0
Outstanding recorded investment		$ 0	$ 0
Related allowance		$ 0	$ 0
Number of contracts \| contract		0	0
Recorded investment		$ 0	$ 0
Home equity line of credit
Loan modifications determined to be troubled debt restructurings
Number of contracts \| contract		0	0
Outstanding recorded investment		$ 0	$ 0
Related allowance		$ 0	$ 0
Number of contracts \| contract		0	0
Recorded investment		$ 0	$ 0
Residential land
Loan modifications determined to be troubled debt restructurings
Number of contracts \| contract		1	3
Outstanding recorded investment		$ 203,000	$ 799,000
Related allowance		$ 42,000	$ 38,000
Number of contracts \| contract		0	0
Recorded investment		$ 0	$ 0
Commercial construction
Loan modifications determined to be troubled debt restructurings
Number of contracts \| contract		0	0
Outstanding recorded investment		$ 0	$ 0
Related allowance		$ 0	$ 0
Number of contracts \| contract		0	0
Recorded investment		$ 0	$ 0
Residential construction
Loan modifications determined to be troubled debt restructurings
Number of contracts \| contract		0	0
Outstanding recorded investment		$ 0	$ 0
Related allowance		$ 0	$ 0
Number of contracts \| contract		0	0
Recorded investment		$ 0	$ 0
Commercial
Loan modifications determined to be troubled debt restructurings
Number of contracts \| contract		3	7
Outstanding recorded investment		$ 2,634,000	$ 2,931,000
Related allowance		$ 497,000	$ 205,000
Number of contracts \| contract		0	1
Recorded investment		$ 0	$ 9,000
Consumer
Loan modifications determined to be troubled debt restructurings
Number of contracts \| contract		0	0
Outstanding recorded investment		$ 0	$ 0
Related allowance		$ 0	$ 0
Number of contracts \| contract		0	0
Recorded investment		$ 0	$ 0
Troubled debt restructurings real estate loans
Loan modifications determined to be troubled debt restructurings
Minimum period of payment default of loans determined to be TDRs (in days)	90 days	90 days	90 days

Represents the commitments to borrowers whose loan terms are impaired or modified under troubled debt restructuring.

No definition available.

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- Definition

Represents the minimum period of payment default of loans determined to be troubled debt restructurings.

+ References

No definition available.

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- Definition

The amount of the outstanding recorded investment in financial receivables prior to the financial receivables being modified as troubled debt restructurings.

+ References

No definition available.

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- Definition

Amount of increase (decrease) in allowance for credit loss on financing receivable.

+ References

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+ References

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- Definition

Number of financing receivables that have been modified by troubled debt restructurings.

+ References

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- Definition

Number of financing receivable contracts modified as troubled debt restructuring within previous 12 months, with subsequent payment default.

+ References

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- Definition

Amortized cost of financing receivable with payment default in current period and modified within previous 12 months preceding payment default for debtor experiencing financial difficulty.

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