XML 133 R120.htm IDEA: XBRL DOCUMENT
v3.22.4

Derivative Financial Instruments - Derivative Financial Instruments and the Amount and Location of the Net Gains or Losses Recognized in the Statements of Income (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Derivative Instruments Gain Loss [Line Items] |  |  |
Net gains (losses) recognized in the statements of income | $ 3,269 | $ 11,890 | $ 19,885
Interest Rate Lock Commitments | Mortgage Banking Income |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |
Net gains (losses) recognized in the statements of income | $ (915) | $ 8,771 | $ 22,348
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Mortgage Banking | Mortgage Banking | Mortgage Banking
Forward Commitments | Mortgage Banking Income |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |
Net gains (losses) recognized in the statements of income | $ 2,348 | $ 1,580 | $ (4,274)
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Mortgage Banking | Mortgage Banking | Mortgage Banking
Interest Rate Swap Agreements | Other Noninterest Income |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |
Net gains (losses) recognized in the statements of income | $ 44 | $ 77 | $ (129)
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Other | Other | Other
Foreign Exchange Contracts | Other Noninterest Income |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |
Net gains (losses) recognized in the statements of income | $ 1,792 | $ 1,462 | $ 1,940
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Other | Other | Other

X
- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b)(1) -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5618551-113959 + Details
Name: | us-gaap_DerivativeGainLossOnDerivativeNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Indicates line item in statement of income or comprehensive income that includes gain (loss) from derivative. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b)(1) -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5618551-113959 + Details
Name: | us-gaap_DerivativeGainLossStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration
Namespace Prefix: | us-gaap_
Data Type: | enum2:enumerationSetItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DerivativeInstrumentsGainLossLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_InterestRateLockCommitmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=boh_MortgageBankingIncomeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_ForwardContractsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_InterestRateSwapMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=us-gaap_OtherIncomeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_ForeignExchangeContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |