v3.26.1
Basis of presentation - Narrative (Details)
Jun. 30, 2026
branch
Accounting Policies [Abstract]
Number of full-service branches
90
X
- Definition
Number Of Full Service Branches
+ References
No definition available.
+ Details
Name:
fbk_NumberOfFullServiceBranches
Namespace Prefix:
fbk_
Data Type:
xbrli:integerItemType
Balance Type:
na
Period Type:
instant
X
- References
No definition available.
+ Details
Name:
us-gaap_AccountingPoliciesAbstract
Namespace Prefix:
us-gaap_
Data Type:
xbrli:stringItemType
Balance Type:
na
Period Type:
duration