Federal and State Income Taxes (Details) (USD $)
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12 Months Ended | ||
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Dec. 31, 2014
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Dec. 31, 2013
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Dec. 31, 2012
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Deferred tax assets [Abstract] | |||
Available for sale securities mark to market | $ 0us-gaap_DeferredTaxAssetsInvestments | $ 14,751,000us-gaap_DeferredTaxAssetsInvestments | |
Share-based compensation | 9,414,000us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost | 8,064,000us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost | |
Credit loss allowances | 74,362,000us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses | 75,657,000us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses | |
Valuation adjustments | 36,870,000us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsImpairmentLosses | 35,292,000us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsImpairmentLosses | |
Deferred compensation | 23,333,000us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation | 60,068,000us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation | |
Unearned fees | 11,820,000us-gaap_DeferredTaxAssetsDeferredIncome | 10,683,000us-gaap_DeferredTaxAssetsDeferredIncome | |
Other | 26,633,000us-gaap_DeferredTaxAssetsOther | 22,348,000us-gaap_DeferredTaxAssetsOther | |
Total deferred tax assets | 182,432,000us-gaap_DeferredTaxAssetsGross | 226,863,000us-gaap_DeferredTaxAssetsGross | |
Deferred tax liabilities [Abstract] | |||
Available for sale securities mark to market | 37,719,000us-gaap_DeferredTaxLiabilitiesInvestments | 0us-gaap_DeferredTaxLiabilitiesInvestments | |
Depreciation | 18,601,000us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment | 17,333,000us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment | |
Mortgage servicing rights | 86,752,000us-gaap_DeferredTaxLiabilitiesMortgageServicingRights | 72,235,000us-gaap_DeferredTaxLiabilitiesMortgageServicingRights | |
Lease financing | 24,429,000us-gaap_DeferredTaxLiabilitiesLeasingArrangements | 23,202,000us-gaap_DeferredTaxLiabilitiesLeasingArrangements | |
Other | 22,160,000us-gaap_DeferredTaxLiabilitiesOther | 18,494,000us-gaap_DeferredTaxLiabilitiesOther | |
Total deferred tax liabilities | 189,661,000us-gaap_DeferredIncomeTaxLiabilities | 131,264,000us-gaap_DeferredIncomeTaxLiabilities | |
Net deferred tax assets (liabilities) | (7,229,000)us-gaap_DeferredTaxAssetsLiabilitiesNet | 95,599,000us-gaap_DeferredTaxAssetsLiabilitiesNet | |
Current income tax expense [Abstract] | |||
Federal | 85,990,000us-gaap_CurrentFederalTaxExpenseBenefit | 125,412,000us-gaap_CurrentFederalTaxExpenseBenefit | 159,706,000us-gaap_CurrentFederalTaxExpenseBenefit |
State | 9,392,000us-gaap_CurrentStateAndLocalTaxExpenseBenefit | 14,381,000us-gaap_CurrentStateAndLocalTaxExpenseBenefit | 19,103,000us-gaap_CurrentStateAndLocalTaxExpenseBenefit |
Total current income tax expense | 95,382,000us-gaap_CurrentIncomeTaxExpenseBenefit | 139,793,000us-gaap_CurrentIncomeTaxExpenseBenefit | 178,809,000us-gaap_CurrentIncomeTaxExpenseBenefit |
Deferred income tax expense [Abstract] | |||
Federal | 36,521,000us-gaap_DeferredFederalIncomeTaxExpenseBenefit | 15,915,000us-gaap_DeferredFederalIncomeTaxExpenseBenefit | 8,664,000us-gaap_DeferredFederalIncomeTaxExpenseBenefit |
State | 2,949,000us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit | 1,590,000us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit | 1,267,000us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit |
Total deferred income tax expense | 39,470,000us-gaap_DeferredIncomeTaxExpenseBenefit | 17,505,000us-gaap_DeferredIncomeTaxExpenseBenefit | 9,931,000us-gaap_DeferredIncomeTaxExpenseBenefit |
Total income tax expense | 134,852,000us-gaap_IncomeTaxExpenseBenefit | 157,298,000us-gaap_IncomeTaxExpenseBenefit | 188,740,000us-gaap_IncomeTaxExpenseBenefit |
Effective Income Tax Rate Reconciliation, Amount [Abstract] | |||
Federal statutory tax | 150,616,000us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate | 166,680,000us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate | 190,003,000us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate |
Tax exempt revenue | (8,446,000)us-gaap_IncomeTaxReconciliationTaxExemptIncome | (7,361,000)us-gaap_IncomeTaxReconciliationTaxExemptIncome | (5,558,000)us-gaap_IncomeTaxReconciliationTaxExemptIncome |
Effect of state income taxes, net of federal benefit | 9,054,000us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes | 10,937,000us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes | 13,684,000us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes |
Utilization of tax credits | (11,107,000)us-gaap_IncomeTaxReconciliationTaxCredits | (8,145,000)us-gaap_IncomeTaxReconciliationTaxCredits | (5,126,000)us-gaap_IncomeTaxReconciliationTaxCredits |
Bank-owned life insurance | (3,183,000)us-gaap_IncomeTaxReconciliationDeductionsOther | (3,596,000)us-gaap_IncomeTaxReconciliationDeductionsOther | (3,850,000)us-gaap_IncomeTaxReconciliationDeductionsOther |
Reduction of tax accrual | (2,281,000)us-gaap_IncomeTaxReconciliationPriorYearIncomeTaxes | (1,400,000)us-gaap_IncomeTaxReconciliationPriorYearIncomeTaxes | (950,000)us-gaap_IncomeTaxReconciliationPriorYearIncomeTaxes |
Other, net | 199,000us-gaap_IncomeTaxReconciliationOtherAdjustments | 183,000us-gaap_IncomeTaxReconciliationOtherAdjustments | 537,000us-gaap_IncomeTaxReconciliationOtherAdjustments |
Total income tax expense | 134,852,000us-gaap_IncomeTaxExpenseBenefit | 157,298,000us-gaap_IncomeTaxExpenseBenefit | 188,740,000us-gaap_IncomeTaxExpenseBenefit |
Effective Income Tax Rate Reconciliation, Percent [Abstract] | |||
Federal statutory tax (in hundredths) | 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate | 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate | 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate |
Tax exempt revenue (in hundredths) | (2.00%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxExemptIncome | (1.50%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxExemptIncome | (1.00%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxExemptIncome |
Effect of state income taxes, net of federal benefit (in hundredths) | 2.10%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes | 2.30%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes | 2.50%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes |
Utilization of tax credits (in hundredths) | (2.60%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxCredits | (1.70%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxCredits | (0.90%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxCredits |
Bank-owned life insurance (in hundredths) | (0.70%)us-gaap_EffectiveIncomeTaxRateReconciliationDeductionsOther | (0.80%)us-gaap_EffectiveIncomeTaxRateReconciliationDeductionsOther | (0.70%)us-gaap_EffectiveIncomeTaxRateReconciliationDeductionsOther |
Reduction of tax accrual (in hundredths) | (0.50%)us-gaap_EffectiveIncomeTaxRateReconciliationPriorYearIncomeTaxes | (0.30%)us-gaap_EffectiveIncomeTaxRateReconciliationPriorYearIncomeTaxes | (0.10%)us-gaap_EffectiveIncomeTaxRateReconciliationPriorYearIncomeTaxes |
Other, net (in hundredths) | 0.00%us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments | 0.00%us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments | 0.00%us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments |
Total (in hundredths) | 31.30%us-gaap_EffectiveIncomeTaxRateContinuingOperations | 33.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations | 34.80%us-gaap_EffectiveIncomeTaxRateContinuingOperations |
Tax accrual reduction | 2,300,000bokf_TaxAccrualReduction | 1,400,000bokf_TaxAccrualReduction | |
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] | |||
Balance as of January 1 | 12,058,000us-gaap_UnrecognizedTaxBenefits | 12,275,000us-gaap_UnrecognizedTaxBenefits | 12,230,000us-gaap_UnrecognizedTaxBenefits |
Additions for tax for current year positions | 3,813,000us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions | 2,730,000us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions | 3,976,000us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions |
Settlements during the period | 0us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities | 0us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities | (1,000,000)us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities |
Lapses of applicable statute of limitations | (2,497,000)us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations | (2,947,000)us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations | (2,931,000)us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations |
Balance as of December 31 | 13,374,000us-gaap_UnrecognizedTaxBenefits | 12,058,000us-gaap_UnrecognizedTaxBenefits | 12,275,000us-gaap_UnrecognizedTaxBenefits |
Unrecognized Tax Benefits that Would Impact Effective Tax Rate | 8,700,000us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate | ||
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense | 1,500,000us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense | 1,200,000us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense | 1,200,000us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense |
Unrecognized Tax Benefits, Penalties and Interest Accrued | $ 3,600,000us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued | $ 2,900,000us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued | |
Unrecognized Tax Benefits, Number of Reporting Periods Open for Examination, Federal | 3 years | ||
Unrecognized Tax Benefits, Number of Reporting Periods Open for Examination, State, Minimum | 3 years | ||
Unrecognized Tax Benefits, Number of Reporting Periods Open for Examination, State, Maximum | 6 years |
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Reduction of tax accrual during the current year due to the favorable resolution of certain tax issues. No definition available.
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Unrecognized Tax Benefits, Number of Reporting Periods Open for Examination, Federal No definition available.
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Unrecognized Tax Benefits, Number of Reporting Periods Open for Examination, State, Maximum No definition available.
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Unrecognized Tax Benefits, Number of Reporting Periods Open for Examination, Minimum No definition available.
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Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Amount of current state and local tax expense (benefit) pertaining to income (loss) from continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Amount of deferred federal income tax expense (benefit) pertaining to income (loss) from continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Amount of deferred tax liability attributable to taxable temporary differences. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Amount of deferred state and local tax expense (benefit) pertaining to income (loss) from continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from deferred income. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from investments (excludes investments in subsidiaries and equity method investments). No definition available.
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Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards, net of deferred tax liability attributable to taxable temporary differences. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences not separately disclosed. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from employee compensation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from share-based compensation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from estimated impairment losses. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from the provision for loan losses. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Amount of deferred tax liability attributable to taxable temporary differences from investments (excludes investments in subsidiaries and equity method investments). No definition available.
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Amount of deferred tax liability attributable to taxable temporary differences from leasing arrangements. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Amount of deferred tax liability attributable to taxable temporary differences from mortgage servicing rights. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Amount of deferred tax liability attributable to taxable temporary differences not separately disclosed. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Amount of deferred tax liability attributable to taxable temporary differences from property, plant, and equipment. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Percentage of domestic federal statutory tax rate applicable to pretax income (loss). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other deductions. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other adjustments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to revisions of previously reported income tax expense. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to state and local income tax expense (benefit), net of federal tax expense (benefit). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to tax credits. Including, but not limited to, research credit, foreign tax credit, investment tax credit, and other tax credits. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to income (loss) exempt from income taxes. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other deductions. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other adjustments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to revisions of previously reported income tax expense (benefit). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to state and local income tax expense (benefit). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to tax credits. Including, but not limited to, research credit, foreign tax credit, investment tax credit, and other tax credits. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to income (loss) exempt from income taxes. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of expense for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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