Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Interest income:
Interest and fees on loans	$ 153,882	$ 116,664	$ 443,458	$ 303,183
Interest on investment securities
Taxable	6,399	6,843	19,449	18,762
Tax-exempt	1,795	1,818	5,407	5,526
Other	11,836	3,158	35,261	6,353
Total interest income	173,912	128,483	503,575	333,824
Interest expense:
Deposits	69,826	13,133	187,946	25,186
Borrowings	3,160	3,966	9,500	6,901
Total interest expense	72,986	17,099	197,446	32,087
Net interest income	100,926	111,384	306,129	301,737
Provision for credit losses on loans HFI	6,031	8,189	13,603	10,241
(Reversal of) provision for credit losses on unfunded commitments	(3,210)	3,178	(11,369)	9,197
Net interest income after provision for (reversal of) credit losses	98,105	100,017	303,895	282,299
Noninterest income:
Loss from investment securities, net	(14,197)	(140)	(14,156)	(401)
Gain (loss) on sales or write-downs of other real estate owned and other assets	115	429	465	(13)
Other income	1,456	1,870	7,491	4,420
Total noninterest income	8,042	22,592	55,204	97,198
Noninterest expenses:
Salaries, commissions and employee benefits	54,491	51,028	155,299	165,652
Occupancy and equipment expense	6,428	6,011	18,618	17,267
Legal and professional fees	1,760	4,448	7,067	10,171
Data processing	2,338	2,334	6,796	7,219
Advertising	2,124	2,050	6,258	8,114
Amortization of core deposit and other intangibles	889	1,108	2,819	3,546
Mortgage restructuring expense	0	0	0	12,458
Other expense	14,967	14,868	47,872	43,689
Total noninterest expense	82,997	81,847	244,729	268,116
Income before income taxes	23,150	40,762	114,370	111,381
Income tax expense	3,975	8,931	23,507	24,961
Net income applicable to FB Financial Corporation and noncontrolling interest	19,175	31,831	90,863	86,420
Net income applicable to noncontrolling interest	0	0	8	8
Net income applicable to FB Financial Corporation	$ 19,175	$ 31,831	$ 90,855	$ 86,412
Earnings per common share:
Basic (in dollars per share)	$ 0.41	$ 0.68	$ 1.94	$ 1.83
Diluted (in dollars per share)	$ 0.41	$ 0.68	$ 1.94	$ 1.83
Mortgage banking income
Noninterest income:
Mortgage banking income, service charges on deposit accounts, investment services and trust income, ATM and interchange fees	$ 11,998	$ 12,384	$ 36,316	$ 64,474
Service charges on deposit accounts
Noninterest income:
Mortgage banking income, service charges on deposit accounts, investment services and trust income, ATM and interchange fees	2,959	3,208	9,197	9,030
Investment services and trust income
Noninterest income:
Mortgage banking income, service charges on deposit accounts, investment services and trust income, ATM and interchange fees	3,072	2,227	8,227	6,634
ATM and interchange fees
Noninterest income:
Mortgage banking income, service charges on deposit accounts, investment services and trust income, ATM and interchange fees	$ 2,639	$ 2,614	$ 7,664	$ 13,054