XML 55 R41.htm IDEA: XBRL DOCUMENT
v3.22.2.2

Description of the Business - Additional Information (Detail) - branch | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Nov. 30, 2022 | Sep. 30, 2022 | Dec. 31, 2022
Subsequent Event [Line Items] |  |  |
Number of branches (branch) |  | 8 |
Number of branches closed (branch) |  | 4 |
Subsequent Event |  |  |
Subsequent Event [Line Items] |  |  |
Number of branches expected to close (branch) | 1 |  |
Number of branches previously announced as closing (branch) |  |  | 5

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- Definition Number of branches. + References No definition available. + Details
Name: | cubi_NumberOfBranches
Namespace Prefix: | cubi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition Number of Branches Closed + References No definition available. + Details
Name: | cubi_NumberOfBranchesClosed
Namespace Prefix: | cubi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Number of Branches Expected To Close + References No definition available. + Details
Name: | cubi_NumberOfBranchesExpectedToClose
Namespace Prefix: | cubi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Number Of Branches Previously Announced As Closing + References No definition available. + Details
Name: | cubi_NumberOfBranchesPreviouslyAnnouncedAsClosing
Namespace Prefix: | cubi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |