Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Interest income:
Interest and fees on loans	$ 153,185	$ 155,606
Interest on investment securities
Taxable	14,471	9,105
Tax-exempt	1,033	1,442
Other	11,017	9,975
Total interest income	179,706	176,128
Interest expense:
Deposits	70,249	72,625
Borrowings	1,816	4,013
Total interest expense	72,065	76,638
Net interest income	107,641	99,490
Provision for credit losses on loans HFI	1,906	1,852
Provision for (reversal of) credit losses on unfunded commitments	386	(1,070)
Net interest income after provision for credit losses	105,349	98,708
Noninterest income:
Gain (loss) from investment securities, net	16	(16,213)
(Loss) gain on sales or write-downs of premises and equipment, other real estate owned and other assets, net	(625)	565
Other income	1,348	1,710
Total noninterest income	23,032	7,962
Noninterest expenses:
Salaries, commissions and employee benefits	48,351	44,618
Occupancy and equipment expense	6,597	6,614
Advertising	2,487	1,171
Data processing	2,313	2,408
Legal and professional fees	1,992	1,919
Amortization of core deposit and other intangibles	656	789
Merger and integration costs	401	0
Other expense	16,752	14,901
Total noninterest expense	79,549	72,420
Income before income taxes	48,832	34,250
Income tax expense	9,471	6,300
Net income applicable to FB Financial Corporation and noncontrolling interest	39,361	27,950
Net income applicable to noncontrolling interest	0	0
Net income applicable to FB Financial Corporation	$ 39,361	$ 27,950
Earnings per common share:
Basic (in dollars per share)	$ 0.84	$ 0.60
Diluted (in dollars per share)	$ 0.84	$ 0.59
Mortgage banking income
Noninterest income:
Mortgage banking income, service charges on deposit accounts, investment services and trust income, ATM and interchange fees	$ 12,426	$ 12,585
Investment services and trust income
Noninterest income:
Mortgage banking income, service charges on deposit accounts, investment services and trust income, ATM and interchange fees	3,711	3,230
Service charges on deposit accounts
Noninterest income:
Mortgage banking income, service charges on deposit accounts, investment services and trust income, ATM and interchange fees	3,479	3,141
ATM and interchange fees
Noninterest income:
Mortgage banking income, service charges on deposit accounts, investment services and trust income, ATM and interchange fees	$ 2,677	$ 2,944