| Document and Entity Information | Jan. 22, 2024 |
| Document Document And Entity Information [Line Items] | |
| Document Type | 8-K |
| Document Period End Date | Jan. 22, 2024 |
| Entity Registrant Name | BANK OF HAWAII CORPORATION |
| Amendment Flag | false |
| Entity Central Index Key | 0000046195 |
| Entity File Number | 1-6887 |
| Entity Incorporation, State or Country Code | DE |
| Entity Tax Identification Number | 99-0148992 |
| Entity Address, Address Line One | 130 Merchant Street |
| Entity Address, City or Town | Honolulu |
| Entity Address, State or Province | HI |
| Entity Address, Postal Zip Code | 96813 |
| City Area Code | 888 |
| Local Phone Number | 643-3888 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Common Stock [Member] | |
| Document Document And Entity Information [Line Items] | |
| Security 12b Title | Common Stock, par value $0.01 per share |
| Trading Symbol | BOH |
| Security Exchange Name | NYSE |
| Series A Preferred Stock [Member] | |
| Document Document And Entity Information [Line Items] | |
| Security 12b Title | Depository Shares, Each Representing 1/40th Interest in a Share of 4.375% Fixed Rate Non-Cumulative Preferred Stock, Series A |
| Trading Symbol | BOH.PRA |
| Security Exchange Name | NYSE |
