XML 78 R67.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Commitments and Contingencies - Summary of Financial Instruments with Off-Balance Sheet Credit Risk (Details) - USD ($) $ in Thousands | Jun. 30, 2017 | Dec. 31, 2016
--- | --- | ---
Fair Value Off Balance Sheet Risks Disclosure Information [Line Items] |  |
Financial instruments with off-balance sheet credit loss | $ 685,379 | $ 602,426
Commitments to Extend Credit, Excluding Interest Rate Lock Commitments |  |
Fair Value Off Balance Sheet Risks Disclosure Information [Line Items] |  |
Financial instruments with off-balance sheet credit loss | 666,372 | 579,879
Letter of Credit |  |
Fair Value Off Balance Sheet Risks Disclosure Information [Line Items] |  |
Financial instruments with off-balance sheet credit loss | $ 19,007 | $ 22,547

X
- Definition The face amount of financial liabilities, which are not recognized in the financial statements (off-balance sheet) because they fail to meet some other criterion for recognition. + References No definition available. + Details
Name: | us-gaap_FairValueDisclosureOffbalanceSheetRisksFaceAmountLiability
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 No definition available. + Details
Name: | us-gaap_FairValueOffBalanceSheetRisksDisclosureInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_CommitmentsToExtendCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=fbk_CommitmentsUnderLetterOfCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |