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Goodwill and Intangible Assets (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Feb. 14, 2020
Mar. 31, 2021
Jun. 30, 2020
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Business Acquisition [Line Items]            
Goodwill, Impairment Loss       $ 0 $ 0 $ 0
Goodwill       1,104,992 1,109,300  
ABRC [Member]            
Business Acquisition [Line Items]            
Goodwill     $ 82,000      
Whitnell            
Business Acquisition [Line Items]            
Goodwill   $ 4,000        
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member]            
Business Acquisition [Line Items]            
Reductions due to sale       (1,317) $ (17,435) $ (217)
First Staunton Bancshares            
Business Acquisition [Line Items]            
Goodwill $ 14,812     $ 15,000