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Goodwill and Other Intangible Assets - Schedule of Goodwill (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Goodwill [Roll Forward]      
Beginning balance $ 452,390 $ 452,390  
Change in goodwill from reallocation 0 0  
Ending balance 452,390 452,390 $ 452,390
Goodwill impairment 0 0 44,877
Wholesale Banking Reporting Unit      
Goodwill [Roll Forward]      
Beginning balance 171,636 171,636  
Change in goodwill from reallocation 0 0  
Ending balance 171,636 171,636 171,636
Community Banking Reporting Unit      
Goodwill [Roll Forward]      
Beginning balance 256,323 256,323  
Change in goodwill from reallocation (114,701) 0  
Ending balance 141,622 256,323 256,323
Consumer Banking Reporting Unit      
Goodwill [Roll Forward]      
Beginning balance 0 0  
Change in goodwill from reallocation 114,701 0  
Ending balance 114,701 0 0
Goodwill impairment     44,900
Wealth Management Reporting Unit      
Goodwill [Roll Forward]      
Beginning balance 24,431 24,431  
Change in goodwill from reallocation 0 0  
Ending balance $ 24,431 $ 24,431 $ 24,431