XML 47 R38.htm IDEA: XBRL DOCUMENT
v3.22.2.2

Derivatives, Derivatives Instruments Gain (Loss) in Income Statement (Details) - Not Designated as Hedging Instrument [Member] - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Derivative Instruments, Gain (Loss) Recognized in Income, Net [Abstract] |  |  |  |  |  |  |  |
Brokergage and Trading Revenue | $ 65,552 |  | $ 16,882 |  | $ 105,321 |  | $ 9,351 |
Gain (Loss) on Derivatives, Net | (17,009) |  | (5,760) |  | (77,559) |  | (14,590) |
Total customer risk management programs |  |  |  |  |  |  |  |
Derivative Instruments, Gain (Loss) Recognized in Income, Net [Abstract] |  |  |  |  |  |  |  |
Brokergage and Trading Revenue | 13,179 |  | 6,930 |  | 37,250 |  | 11,327 |
Gain (Loss) on Derivatives, Net | 0 |  | 0 |  | 0 |  | 0 |
Interest rate contracts [Member] |  |  |  |  |  |  |  |
Derivative Instruments, Gain (Loss) Recognized in Income, Net [Abstract] |  |  |  |  |  |  |  |
Brokergage and Trading Revenue | 2,677 |  | 1,283 |  | 9,958 |  | 3,687 |
Gain (Loss) on Derivatives, Net | 0 |  | 0 |  | 0 |  | 0 |
Energy contracts [Member] |  |  |  |  |  |  |  |
Derivative Instruments, Gain (Loss) Recognized in Income, Net [Abstract] |  |  |  |  |  |  |  |
Brokergage and Trading Revenue | 10,386 |  | 5,528 |  | 26,870 |  | 7,142 |
Gain (Loss) on Derivatives, Net | 0 |  | 0 |  | 0 |  | 0 |
Agricultural contracts [Member] |  |  |  |  |  |  |  |
Derivative Instruments, Gain (Loss) Recognized in Income, Net [Abstract] |  |  |  |  |  |  |  |
Brokergage and Trading Revenue | 0 |  | (1) |  | 0 |  | 27 |
Gain (Loss) on Derivatives, Net | 0 |  | 0 |  | 0 |  | 0 |
Foreign exchange contracts [Member] |  |  |  |  |  |  |  |
Derivative Instruments, Gain (Loss) Recognized in Income, Net [Abstract] |  |  |  |  |  |  |  |
Brokergage and Trading Revenue | 116 |  | 120 |  | 422 |  | 471 |
Gain (Loss) on Derivatives, Net | 0 |  | 0 |  | 0 |  | 0 |
Equity option contracts [Member] |  |  |  |  |  |  |  |
Derivative Instruments, Gain (Loss) Recognized in Income, Net [Abstract] |  |  |  |  |  |  |  |
Brokergage and Trading Revenue | 0 |  | 0 |  | 0 |  | 0 |
Gain (Loss) on Derivatives, Net | 0 |  | 0 |  | 0 |  | 0 |
Trading [Member] |  |  |  |  |  |  |  |
Derivative Instruments, Gain (Loss) Recognized in Income, Net [Abstract] |  |  |  |  |  |  |  |
Brokergage and Trading Revenue | 52,373 | [1] | 9,952 | [1] | 68,071 | [2] | (1,976) | [2]
Gain (Loss) on Derivatives, Net | 0 | [1] | 0 | [1] | 0 | [2] | 0 | [2]
Internal risk management programs [Member] |  |  |  |  |  |  |  |
Derivative Instruments, Gain (Loss) Recognized in Income, Net [Abstract] |  |  |  |  |  |  |  |
Brokergage and Trading Revenue | 0 |  | 0 |  | 0 |  | 0 |
Gain (Loss) on Derivatives, Net | $ (17,009) |  | $ (5,760) |  | $ (77,559) |  | $ (14,590) |
[1] | Represents changes in fair value of to-be-announced securities and other derivative instruments held to mitigate market risk of trading securities portfolio, which is offset by changes in fair value of trading securities also included in Brokerage and Trading Revenue in the Consolidated Statements of Earnings.
[2] | Represents changes in fair value of to-be-announced securities and other derivative instruments held to mitigate market risk of trading securities portfolio, which is offset by changes in fair value of trading securities also included in Brokerage and Trading Revenue in the Consolidated Statements of Earnings.

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

X
- Definition Amount of gain (loss) resulting from the difference between the acquisition price and the selling price or fair value of trading assets and trading liabilities, conducted separately from customer trading activities. Includes, but is not limited to, changes in fair value of trading assets and trading liabilities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4F -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5624186-113959 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 320 -Section 35 -Paragraph 3 -URI https://asc.fasb.org/extlink&oid=35711043&loc=d3e42454-110968 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 320 -Section 45 -Paragraph 5 -URI https://asc.fasb.org/extlink&oid=35711157&loc=d3e42567-110969 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.13(e)) -URI https://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 + Details
Name: | us-gaap_TradingGainsLosses
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_HedgingDesignationAxis=us-gaap_NondesignatedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=bokf_AgriculturalContractsMember
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: |

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

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

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