XML 122 R107.htm IDEA: XBRL DOCUMENT v3.20.4
Business Combinations - Additional Information (Details)
$ in Thousands
12 Months Ended
Aug. 21, 2020
USD ($)
branch
Mar. 13, 2020
USD ($)
branch
Oct. 19, 2018
USD ($)
branch
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Business Acquisition [Line Items]            
Acquisition costs       $ (9,100) $ (1,000) $ (9,700)
Fourth Street Banking Company            
Business Acquisition [Line Items]            
Number of branches acquired | branch 2          
Percentage of common stock acquired 100.00%          
Common stock portion, number of Seacoast stock for each share of stock converted (in shares) 0.1275          
Goodwill, nondeductible for tax purposes $ 9,000          
First Bank of The Palm Beaches            
Business Acquisition [Line Items]            
Number of branches operated | branch   2        
Percentage of common stock acquired   100.00%        
Common stock portion, number of Seacoast stock for each share of stock converted (in shares)   0.2000        
Goodwill, nondeductible for tax purposes   $ 6,900        
First Green Bancorp, Inc.            
Business Acquisition [Line Items]            
Number of branches operated | branch     7      
Percentage of common stock acquired     100.00%      
Common stock portion, number of Seacoast stock for each share of stock converted (in shares)     0.7324      
Goodwill, nondeductible for tax purposes     $ 56,700