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Securities - Schedule of Information Regarding Securities with Unrealized Losses (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Securities in an Unrealized Loss Position for Less than 12 Months    
Fair Value, AFS and HTM $ 478,793 $ 2,023,736
Unrealized Losses, AFS and HTM 33,147 30,297
Securities in an Unrealized Loss Position for More than 12 Months    
Fair Value, AFS and HTM 2,263,197 487,570
Unrealized Losses, AFS and HTM 520,099 18,031
Total    
Fair Value, AFS and HTM 2,741,990 2,511,306
Unrealized Losses, AFS and HTM 553,246 48,328
US Treasury Securities    
Securities in an Unrealized Loss Position for Less than 12 Months    
Fair Value, AFS 168,758  
Unrealized Losses, AFS 5,662  
Securities in an Unrealized Loss Position for More than 12 Months    
Fair Value, AFS 0  
Unrealized Losses, AFS 0  
Total    
Fair Value, AFS 168,758  
Unrealized Losses, AFS 5,662  
Government-sponsored enterprise securities    
Securities in an Unrealized Loss Position for Less than 12 Months    
Fair Value, AFS 0 21,436
Unrealized Losses, AFS 0 522
Securities in an Unrealized Loss Position for More than 12 Months    
Fair Value, AFS 57,456 47,743
Unrealized Losses, AFS 14,501 2,250
Total    
Fair Value, AFS 57,456 69,179
Unrealized Losses, AFS 14,501 2,772
Mortgage-backed securities    
Securities in an Unrealized Loss Position for Less than 12 Months    
Fair Value, AFS and HTM 221,006 1,773,022
Unrealized Losses, AFS and HTM 18,215 25,977
Securities in an Unrealized Loss Position for More than 12 Months    
Fair Value, AFS and HTM 1,835,958 404,484
Unrealized Losses, AFS and HTM 405,557 13,857
Total    
Fair Value, AFS and HTM 2,056,964 2,177,506
Unrealized Losses, AFS and HTM 423,772 39,834
Corporate bonds    
Securities in an Unrealized Loss Position for Less than 12 Months    
Fair Value, AFS 40,644 999
Unrealized Losses, AFS 947 1
Securities in an Unrealized Loss Position for More than 12 Months    
Fair Value, AFS 886 945
Unrealized Losses, AFS 114 55
Total    
Fair Value, AFS 41,530 1,944
Unrealized Losses, AFS 1,061 56
State and local governments    
Securities in an Unrealized Loss Position for Less than 12 Months    
Fair Value, HTM 48,385 228,279
Unrealized Losses, HTM 8,323 3,797
Securities in an Unrealized Loss Position for More than 12 Months    
Fair Value, HTM 368,897 34,398
Unrealized Losses, HTM 99,927 1,869
Total    
Fair Value, HTM 417,282 262,677
Unrealized Losses, HTM $ 108,250 $ 5,666