Consolidated Statements of Comprehensive (Loss) Income (Unaudited) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Statement of Comprehensive Income [Abstract]
Net income		$ 35,307	$ 19,353	$ 71,688	$ 54,589
Other comprehensive (loss) income, net of tax:
Net unrealized (loss) gain in available-for-sale securities, net of tax (benefit) expense of $(4,890), $(17,343), $2,169 and $(44,826)		(13,858)	(49,233)	6,206	(127,408)
Reclassification adjustment for gain on sale of securities included in net income(1)	[1]	0	(1)	0	(2)
Net unrealized gain (loss) in hedging activities, net of tax expense (benefit) of $6, $99, $(64) and $372		17	283	(180)	1,057
Total other comprehensive (loss) income, net of tax		(13,841)	(48,951)	6,026	(126,353)
Comprehensive income (loss) applicable to FB Financial Corporation and noncontrolling interest		21,466	(29,598)	77,714	(71,764)
Comprehensive income applicable to noncontrolling interest		8	8	8	8
Comprehensive income (loss) applicable to FB Financial Corporation		$ 21,458	$ (29,606)	$ 77,706	$ (71,772)

[1] The tax expense for all periods shown was not meaningful.