Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Interest income:
Interest and fees on loans	$ 158,625	$ 153,882	$ 469,610	$ 443,458
Interest on investment securities
Taxable	13,943	6,399	35,014	19,449
Tax-exempt	1,104	1,795	3,714	5,407
Other	11,956	11,836	30,831	35,261
Total interest income	185,628	173,912	539,169	503,575
Interest expense:
Deposits	76,088	69,826	220,214	187,946
Borrowings	3,523	3,160	10,833	9,500
Total interest expense	79,611	72,986	231,047	197,446
Net interest income	106,017	100,926	308,122	306,129
Provision for credit losses on loans HFI	1,856	6,031	7,648	13,603
Provision for (reversal of) credit losses on unfunded commitments	58	(3,210)	(2,728)	(11,369)
Net interest income after provision for credit losses	104,103	98,105	303,202	303,895
Noninterest income:
Loss from investment securities, net	(40,165)	(14,197)	(56,378)	(14,156)
(Loss) gain on sales or write-downs of other real estate owned and other assets	(289)	115	(5)	465
Other income	2,465	1,456	8,786	7,491
Total noninterest (loss) income	(16,497)	8,042	17,073	55,204
Noninterest expenses:
Salaries, commissions and employee benefits	47,538	54,491	138,381	155,299
Occupancy and equipment expense	6,640	6,428	19,582	18,618
Data processing	2,486	2,338	7,180	6,796
Advertising	1,947	2,124	4,977	6,258
Legal and professional fees	1,900	1,760	5,798	7,067
Amortization of core deposit and other intangibles	719	889	2,260	2,819
Other expense	14,982	14,967	45,547	47,872
Total noninterest expense	76,212	82,997	223,725	244,729
Income before income taxes	11,394	23,150	96,550	114,370
Income tax expense	1,174	3,975	18,393	23,507
Net income applicable to FB Financial Corporation and noncontrolling interest	10,220	19,175	78,157	90,863
Net income applicable to noncontrolling interest	0	0	8	8
Net income applicable to FB Financial Corporation	$ 10,220	$ 19,175	$ 78,149	$ 90,855
Earnings per common share:
Basic (in dollars per share)	$ 0.22	$ 0.41	$ 1.67	$ 1.94
Diluted (in dollars per share)	$ 0.22	$ 0.41	$ 1.67	$ 1.94
Mortgage banking income
Noninterest income:
Mortgage banking income, service charges on deposit accounts, investment services and trust income, ATM and interchange fees	$ 11,553	$ 11,998	$ 36,048	$ 36,316
Investment services and trust income
Noninterest income:
Mortgage banking income, service charges on deposit accounts, investment services and trust income, ATM and interchange fees	3,721	3,072	10,338	8,227
Service charges on deposit accounts
Noninterest income:
Mortgage banking income, service charges on deposit accounts, investment services and trust income, ATM and interchange fees	3,378	2,959	9,686	9,197
ATM and interchange fees
Noninterest income:
Mortgage banking income, service charges on deposit accounts, investment services and trust income, ATM and interchange fees	$ 2,840	$ 2,639	$ 8,598	$ 7,664