v3.26.1
Mergers and Acquisitions - Schedule of Unaudited Pro Forma Financial Information (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2026
Sep. 30, 2025
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Business Combination, Pro Forma Information [Line Items]          
Provision expense for credit losses on acquired loans and unfunded commitments $ 10,116   $ 5,337 $ 13,140 $ 7,629
Net interest income     140,844   276,716
Total revenues     96,000   256,557
Net (loss) income applicable to FB Financial Corporation     $ (2,503)   $ 48,681
Southern States Bancshares, Inc.          
Business Combination, Pro Forma Information [Line Items]          
Provision expense for credit losses on acquired loans and unfunded commitments   $ 28,366