XML 201 R127.htm IDEA: XBRL DOCUMENT
v3.25.0.1

Derivative Instruments and Hedging Activities - Narrative (Detail) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 USD ($) derivative contract | Dec. 31, 2023 USD ($) derivative contract | Dec. 31, 2022 USD ($) derivative
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivative, net liability position, aggregate fair value | $ 14.2 |  |
Cash collateral received | $ 14.6 |  |
Not Designated as Hedging Instrument | Interest rate swaps |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Number of interest rate swaps | derivative | 128 | 132 |
Derivative notional amount | $ 1,200.0 | $ 1,200.0 |
Not Designated as Hedging Instrument | Interest rate caps |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Number of interest rate swaps | derivative | 2 | 2 |
Derivative notional amount | $ 150.0 | $ 55.6 |
Cash Flow Hedging | Designated as Hedging Instrument | Interest rate swaps |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Number of interest rate swaps | contract | 0 | 0 |
Fair Value Hedging | Designated as Hedging Instrument | Interest rate swaps |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Number of interest rate swaps | derivative | 46 | 6 |
Derivative notional amount | $ 2,400.0 | $ 472.5 |
Notional amount of interest rate derivatives entered into during the period |  | $ 1,000.0 |
Number of contracts terminated | derivative |  |  | 13
Fair Value Hedging | Designated as Hedging Instrument | Interest rate contract |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Number of interest rate derivatives entered into during the period | derivative | 44 | 5 |
Notional amount of interest rate derivatives entered into during the period | $ 2,000.0 |  |
Number of derivatives terminated | derivative | 1 | 2 |
National amount of derivatives terminated | $ 5.7 | $ 550.0 |
Notional amount of basis adjustments |  | $ 4.6 |
Fair Value Hedging | Designated as Hedging Instrument | Terminated interest rate swap |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivative notional amount |  |  | $ 58.0

X
- Definition Derivative, Net Asset Position, Aggregate Fair Value + References No definition available. + Details
Name: | cubi_DerivativeNetAssetPositionAggregateFairValue
Namespace Prefix: | cubi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Derivative, Notional Amount, Basis Adjustments + References No definition available. + Details
Name: | cubi_DerivativeNotionalAmountBasisAdjustments
Namespace Prefix: | cubi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Derivative, Notional Amount, Terminated + References No definition available. + Details
Name: | cubi_DerivativeNotionalAmountTerminated
Namespace Prefix: | cubi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Derivative, Number of Contracts Terminated + References No definition available. + Details
Name: | cubi_DerivativeNumberOfContractsTerminated
Namespace Prefix: | cubi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Notional Amount Of Interest Rate Derivatives Entered Into During The Period + References No definition available. + Details
Name: | cubi_NotionalAmountOfInterestRateDerivativesEnteredIntoDuringThePeriod
Namespace Prefix: | cubi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Number of Interest Rate Derivatives Entered Into During The Period + References No definition available. + Details
Name: | cubi_NumberOfInterestRateDerivativesEnteredIntoDuringThePeriod
Namespace Prefix: | cubi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of Interest Rate Derivatives Terminated + References No definition available. + Details
Name: | cubi_NumberOfInterestRateDerivativesTerminated
Namespace Prefix: | cubi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fair value of securities received as collateral against derivative assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483444/210-20-55-12 + Details
Name: | us-gaap_DerivativeAssetFairValueOfCollateral
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4E -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4E + Details
Name: | us-gaap_DerivativeInstrumentsGainLossLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Nominal or face amount used to calculate payment on derivative. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-1B Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1A -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-1A + Details
Name: | us-gaap_DerivativeNotionalAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of derivative instruments of a particular group held by the entity. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 210 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478795/946-210-50-6 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 946 -SubTopic 210 -Name Accounting Standards Codification -Section 55 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477439/946-210-55-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 5 -Subparagraph (SX 210.12-13(Column A)(Footnote 3)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477271/946-320-S99-5 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 5 -Subparagraph (SX 210.12-13(Column C)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477271/946-320-S99-5 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 5A -Subparagraph (SX 210.12-13A(Column B)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477271/946-320-S99-5A Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-1B Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-1A + Details
Name: | us-gaap_DerivativeNumberOfInstrumentsHeld
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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

X
- Details
Name: | us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis=us-gaap_CashFlowHedgingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis=us-gaap_FairValueHedgingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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