XML 138 R112.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Income Taxes - Narrative (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Income Taxes [Line Items] |  |
Federal income tax benefit, unrecognized state tax benefits recognized in deferred taxes that would impact effective tax rate | $ 0.4 |
Interest related to unrecognized tax benefits | 0.1 | $ 1.4
Federal |  |
Income Taxes [Line Items] |  |
Net operating loss carryovers | 3.1 |
State and Local Jurisdiction |  |
Income Taxes [Line Items] |  |
Net operating loss carryovers | $ 3.1 |

X
- Definition Federal Income Tax Benefit, Unrecognized State Tax Benefits Recognized In Deferred Taxes That Would Impact Effective Tax Rate + References No definition available. + Details
Name: | cubi_FederalIncomeTaxBenefitUnrecognizedStateTaxBenefitsRecognizedInDeferredTaxesThatWouldImpactEffectiveTaxRate
Namespace Prefix: | cubi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Income Taxes [Line Items] + References No definition available. + Details
Name: | cubi_IncomeTaxesLineItems
Namespace Prefix: | cubi_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-3 + Details
Name: | us-gaap_OperatingLossCarryforwards
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of interest expense for an underpayment of income taxes. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 15 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-15 + Details
Name: | us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_IncomeTaxAuthorityAxis=us-gaap_DomesticCountryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeTaxAuthorityAxis=us-gaap_StateAndLocalJurisdictionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |