v3.26.1
Schedule H, Line 4i – Schedule of Assets (Held At End of Year) (Details) - EBP 001 - USD ($)
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
EBP, Schedule of Asset Held for Investment [Line Items]    
Entity tax identification number 62-1216058  
Plan number 001  
Current value $ 137,838,445  
Notes receivable from participants 131,391 $ 0
Assets held for investment $ 137,969,836  
Minimum    
EBP, Schedule of Asset Held for Investment [Line Items]    
Participant loans, interest rate 5.25%  
Maximum    
EBP, Schedule of Asset Held for Investment [Line Items]    
Participant loans, interest rate 10.50%  
Cash Reserve Account    
EBP, Schedule of Asset Held for Investment [Line Items]    
Current value $ 27,194  
FB Financial Corporation common stock    
EBP, Schedule of Asset Held for Investment [Line Items]    
Current value 1,232,546  
Mutual funds    
EBP, Schedule of Asset Held for Investment [Line Items]    
Current value 136,578,705  
Investment, Identifier [Axis]: Allspring | Special Mid Cap Value R6    
EBP, Schedule of Asset Held for Investment [Line Items]    
Current value 743,257  
Investment, Identifier [Axis]: American Funds | America Funds American High Income Trust R6    
EBP, Schedule of Asset Held for Investment [Line Items]    
Current value 343,065  
Investment, Identifier [Axis]: American Funds | American Funds 2010 Trgt Date Retire R6    
EBP, Schedule of Asset Held for Investment [Line Items]    
Current value 892,688  
Investment, Identifier [Axis]: American Funds | American Funds 2015 Trgt Date Retire R6    
EBP, Schedule of Asset Held for Investment [Line Items]    
Current value 1,084,896  
Investment, Identifier [Axis]: American Funds | American Funds 2020 Trgt Date Retire R6    
EBP, Schedule of Asset Held for Investment [Line Items]    
Current value 2,332,374  
Investment, Identifier [Axis]: American Funds | American Funds 2025 Trgt Date Retire R6    
EBP, Schedule of Asset Held for Investment [Line Items]    
Current value 5,861,649  
Investment, Identifier [Axis]: American Funds | American Funds 2030 Trgt Date Retire R6    
EBP, Schedule of Asset Held for Investment [Line Items]    
Current value 14,870,410  
Investment, Identifier [Axis]: American Funds | American Funds 2035 Trgt Date Retire R6    
EBP, Schedule of Asset Held for Investment [Line Items]    
Current value 20,023,374  
Investment, Identifier [Axis]: American Funds | American Funds 2040 Trgt Date Retire R6    
EBP, Schedule of Asset Held for Investment [Line Items]    
Current value 11,885,957  
Investment, Identifier [Axis]: American Funds | American Funds 2045 Trgt Date Retire R6    
EBP, Schedule of Asset Held for Investment [Line Items]    
Current value 11,811,787  
Investment, Identifier [Axis]: American Funds | American Funds 2050 Trgt Date Retire R6    
EBP, Schedule of Asset Held for Investment [Line Items]    
Current value 9,037,361  
Investment, Identifier [Axis]: American Funds | American Funds 2055 Trgt Date Retire R6    
EBP, Schedule of Asset Held for Investment [Line Items]    
Current value 6,226,413  
Investment, Identifier [Axis]: American Funds | American Funds 2060 Trgt Date Retire R6    
EBP, Schedule of Asset Held for Investment [Line Items]    
Current value 4,281,785  
Investment, Identifier [Axis]: American Funds | American Funds Balanced R6    
EBP, Schedule of Asset Held for Investment [Line Items]    
Current value 1,062,664  
Investment, Identifier [Axis]: American Funds | American Funds New Perspective R6    
EBP, Schedule of Asset Held for Investment [Line Items]    
Current value 3,515,775  
Investment, Identifier [Axis]: Brandes | Brandes International Equity Fund R6    
EBP, Schedule of Asset Held for Investment [Line Items]    
Current value 1,198,763  
Investment, Identifier [Axis]: Federated | Federated Hermes MDT Mid Cap Growth Fund R6    
EBP, Schedule of Asset Held for Investment [Line Items]    
Current value 687,787  
Investment, Identifier [Axis]: Harbor | Harbor Small Cap Growth Retirement    
EBP, Schedule of Asset Held for Investment [Line Items]    
Current value 2,350,388  
Investment, Identifier [Axis]: JPMorgan | JPMorgan Large Cap Growth R6    
EBP, Schedule of Asset Held for Investment [Line Items]    
Current value 9,898,876  
Investment, Identifier [Axis]: MFS | MFS Total Return Bond R6    
EBP, Schedule of Asset Held for Investment [Line Items]    
Current value 886,642  
Investment, Identifier [Axis]: Macquarie | Macquarie Small Cap Value Institutional    
EBP, Schedule of Asset Held for Investment [Line Items]    
Current value 402,567  
Investment, Identifier [Axis]: Putnam | Putnam Large Cap Value R6    
EBP, Schedule of Asset Held for Investment [Line Items]    
Current value 3,119,959  
Investment, Identifier [Axis]: Schwab | Schwab Small Cap Index    
EBP, Schedule of Asset Held for Investment [Line Items]    
Current value 1,755,911  
Investment, Identifier [Axis]: Vanguard | Vanguard 500 Index Adm    
EBP, Schedule of Asset Held for Investment [Line Items]    
Current value 12,370,895  
Investment, Identifier [Axis]: Vanguard | Vanguard Federal Money Market    
EBP, Schedule of Asset Held for Investment [Line Items]    
Current value 3,265,589  
Investment, Identifier [Axis]: Vanguard | Vanguard LifeStrategy Conservative Growth    
EBP, Schedule of Asset Held for Investment [Line Items]    
Current value 28,648  
Investment, Identifier [Axis]: Vanguard | Vanguard LifeStrategy Growth    
EBP, Schedule of Asset Held for Investment [Line Items]    
Current value 1,386,302  
Investment, Identifier [Axis]: Vanguard | Vanguard LifeStrategy Income    
EBP, Schedule of Asset Held for Investment [Line Items]    
Current value 62,000  
Investment, Identifier [Axis]: Vanguard | Vanguard LifeStrategy Moderate Growth    
EBP, Schedule of Asset Held for Investment [Line Items]    
Current value 529,696  
Investment, Identifier [Axis]: Vanguard | Vanguard Mid Cap Index Adm    
EBP, Schedule of Asset Held for Investment [Line Items]    
Current value 2,953,779  
Investment, Identifier [Axis]: Vanguard | Vanguard Short Term Investment Grade Adm    
EBP, Schedule of Asset Held for Investment [Line Items]    
Current value $ 1,707,448