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Summary of Significant Accounting Policies - Intangible assets, Transfer of financial assets (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Intangible Assets        
Goodwill $ 1,923,106 $ 1,923,106 $ 1,581,085 $ 1,563,942
Impairment Charges $ 0 $ 0    
Minimum        
Intangible Assets        
Estimated useful lives of intangibles   2 years    
Maximum        
Intangible Assets        
Estimated useful lives of intangibles   15 years    
Core deposit intangibles | Minimum        
Intangible Assets        
Estimated useful lives of intangibles   10 years    
Core deposit intangibles | Maximum        
Intangible Assets        
Estimated useful lives of intangibles   13 years    
Client list intangibles        
Intangible Assets        
Estimated useful lives of intangibles   15 years