v3.26.3
Minimum Capital Requirements (Tables)
 9 Months Ended
Sep. 30, 2026
Broker-Dealer, Net Capital Requirement, SEC Regulation [Abstract]  
Schedule of Actual and Required Capital Amounts and Ratios
Actual and required capital amounts and ratios are included below as of the dates indicated.
September 30, 2026
ActualMinimum Requirement for Capital Adequacy with
Capital Buffer		To Qualify as Well-Capitalized Under Prompt Corrective Action Provisions
AmountRatioAmountRatioAmountRatio
Total capital (to risk-weighted assets)
FB Financial Corporation$2,041,720 13.6 %$1,577,202 10.5 %N/AN/A
FirstBank1,992,455 13.3 %1,574,939 10.5 %$1,499,942 10.0 %
Tier 1 capital (to risk-weighted assets)
FB Financial Corporation$1,645,994 11.0 %$1,276,782 8.5 %N/AN/A
FirstBank1,804,717 12.0 %1,274,950 8.5 %$1,199,953 8.0 %
Common equity tier 1 capital
   (to risk-weighted assets)
FB Financial Corporation$1,645,994 11.0 %$1,051,468 7.0 %N/AN/A
FirstBank1,804,717 12.0 %1,049,959 7.0 %$974,962 6.5 %
Tier 1 capital (to average assets)
FB Financial Corporation$1,645,994 10.0 %$657,268 4.0 %N/AN/A
FirstBank1,804,717 11.0 %655,843 4.0 %$819,804 5.0 %
December 31, 2025ActualMinimum Requirement for Capital Adequacy with
Capital Buffer		To Qualify as Well-Capitalized Under Prompt Corrective Action Provisions
AmountRatioAmountRatioAmountRatio
Total capital (to risk-weighted assets)
FB Financial Corporation$1,888,051 13.2 %$1,496,600 10.5 %N/AN/A
FirstBank1,830,102 12.9 %1,484,360 10.5 %$1,413,676 10.0 %
Tier 1 capital (to risk-weighted assets)
FB Financial Corporation$1,625,952 11.4 %$1,211,534 8.5 %N/AN/A
FirstBank1,653,113 11.7 %1,201,625 8.5 %$1,130,941 8.0 %
Common equity tier 1 capital
(to risk-weighted assets)
FB Financial Corporation$1,625,952 11.4 %$997,734 7.0 %N/AN/A
FirstBank1,653,113 11.7 %989,573 7.0 %$918,889 6.5 %
Tier 1 capital (to average assets)
FB Financial Corporation$1,625,952 10.3 %$633,378 4.0 %N/AN/A
FirstBank1,653,113 10.5 %631,928 4.0 %$789,910 5.0 %