XML 57 R48.htm IDEA: XBRL DOCUMENT
v3.23.1

Commitments and Contingent Liabilities (Details) | 3 Months Ended
--- | ---
Mar. 31, 2023 USD ($)
Judicial Ruling [Member] | Misuse of Revenues Pledged to Municipal Bonds [Member] |
Litigation Settlement [Abstract] |
Disgorged fees | $ 1,067,721
Litigation Settlement, Amount Awarded to Other Party | $ 600,000
Pending Litigation [Member] | Misuse of Revenues Pledged to Municipal Bonds [Member] |
Litigation Settlement [Abstract] |
Loss Contingency, Number of Plaintiffs | 2
Pending Litigation [Member] | Bank Participation in Fraudulent Sale of Securities by Principals [Member] |
Litigation Settlement [Abstract] |
Loss Contingency, Number of Plaintiffs | 19
Outstanding principal accrued interest and other amounts upon sale of facilities securing payment of the bonds | $ 25,000,000
Principal amount of entered judgment against the principal individual and his wife | 36,805,051
Pre-judgment interest amount of entered judgment against the principal individual and his wife | $ 10,937,831

X
- Definition Represents fees disgorged as a result of a settlement with a regulatory agency. + References No definition available. + Details
Name: | bokf_DisgorgedFees
Namespace Prefix: | bokf_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Outstanding principal accrued interest and other amounts upon sale of facilities securing payment of the bonds + References No definition available. + Details
Name: | bokf_Outstandingprincipalaccruedinterestandotheramountsuponsaleoffacilitiessecuringpaymentofthebonds
Namespace Prefix: | bokf_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Pre-judgment interest amount of entered judgment against the principal individual and his wife + References No definition available. + Details
Name: | bokf_Prejudgmentinterestamountofenteredjudgmentagainsttheprincipalindividualandhiswife
Namespace Prefix: | bokf_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Principal amount of entered judgment against the principal individual and his wife + References No definition available. + Details
Name: | bokf_Principalamountofenteredjudgmentagainsttheprincipalindividualandhiswife
Namespace Prefix: | bokf_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_GainLossRelatedToLitigationSettlementAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount awarded to other party in judgment or settlement of litigation. + References No definition available. + Details
Name: | us-gaap_LitigationSettlementAmountAwardedToOtherParty
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Number of plaintiffs that have filed claims pertaining to a loss contingency. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=121557415&loc=d3e14435-108349 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 9 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=121557415&loc=d3e14557-108349 + Details
Name: | us-gaap_LossContingencyNumberOfPlaintiffs
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_LitigationStatusAxis=us-gaap_JudicialRulingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_LitigationCaseAxis=bokf_MisuseofRevenuesPledgedtoMunicipalBondsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LitigationStatusAxis=us-gaap_PendingLitigationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_LitigationCaseAxis=bokf_BankParticipationinFraudulentSaleofSecuritiesbyPrincipalsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |