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Document and Entity Information
Nov. 29, 2021
Document Document And Entity Information [Line Items]  
Document Type 8-K
Document Period End Date Nov. 29, 2021
Entity Registrant Name BANK OF HAWAII CORP
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
Amendment Flag false
Entity Central Index Key 0000046195
Common Stock [Member]  
Document Document And Entity Information [Line Items]  
Title of 12(b) Security 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]  
Title of 12(b) Security 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