XML 154 R144.htm IDEA: XBRL DOCUMENT v3.21.1
Stock-based compensation - Changes in Restricted Stock Units (Details) - $ / shares
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Aug. 15, 2020
Franklin Financial Network, Inc.        
Weighted Average Grant Date Fair Value        
Replacement awards issued to employees (in shares)       118,776
RSUs        
Restricted Stock Units Outstanding        
Balance at beginning of period (in shares) 826,263,000      
Granted (in shares) 420,521,000      
Vested (in shares) (177,581,000)      
Forfeited (in shares) (22,132,000)      
Balance at end of period (in shares) 1,047,071,000 826,263,000    
Weighted Average Grant Date Fair Value        
Balance at beginning of period (in USD per share) $ 23.76      
Granted (USD per share) 31.35 $ 34.08 $ 39.55  
Vested (USD per share) 31.64      
Forfeited (USD per share) 33.20      
Balance at end of period (in USD per share) $ 26.06 $ 23.76