XML 97 R87.htm IDEA: XBRL DOCUMENT
v3.22.1

Other Borrowings - Summary of Short-term Credit Lines Available for Use (Details) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Federal Home Loan Bank Line |  |
Debt Instrument [Line Items] |  |
Short-term credit lines available for use | $ 2,040,248 | $ 1,883,349
Federal Reserve Bank of Chicago Discount Window Line |  |
Debt Instrument [Line Items] |  |
Short-term credit lines available for use | 747,988 | 602,962
Available Federal Funds Line |  |
Debt Instrument [Line Items] |  |
Short-term credit lines available for use | $ 115,000 | $ 115,000

X
- Definition Short-term line of credit available for use. + References No definition available. + Details
Name: | by_ShortTermLinesOfCreditAvailableForUse
Namespace Prefix: | by_
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 No definition available. + Details
Name: | us-gaap_DebtInstrumentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_LineOfCreditFacilityAxis=us-gaap_FederalHomeLoanBankAdvancesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LineOfCreditFacilityAxis=by_FederalReserveBankOfChicagoDiscountWindowLineMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LineOfCreditFacilityAxis=by_AvailableFederalFundsLineMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |