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Goodwill and Intangible Assets (Schedule of Goodwill and Intangible Assets) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Mar. 31, 2022
Dec. 31, 2021
Mar. 31, 2021
Dec. 31, 2020
Goodwill and Intangible Assets [Roll Forward]                
Total goodwill     $ 823,172          
CDI current period amortization $ (2,219) $ (1,852) (4,507) $ (3,776)        
Indefinite-lived Intangible Assets (Excluding Goodwill) 919 919 919 919        
Other intangible assets, net 30,140 22,958 30,140 22,958   $ 34,647    
Total goodwill and intangible assets, end of period 853,312 788,800 853,312 788,800        
Core Deposits [Member]                
Goodwill and Intangible Assets [Roll Forward]                
Gross core deposit intangible balance, beginning of period         $ 88,931 88,931 $ 105,473 $ 105,473
Accumulated amortization at beginning of period         $ (57,491) $ (55,203) $ (81,582) $ (79,658)
Core deposit intangible, net, beginning of period 31,440 23,891 33,728 25,815        
CDI current period amortization (2,219) (1,852) (4,507) (3,776)        
Total core deposit intangible, end of period $ 29,221 $ 22,039 $ 29,221 $ 22,039