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Securities - Schedule of Available-for-Sales Securities (Details) - USD ($)
$ in Thousands
Sep. 30, 2022
Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost $ 2,010,101 $ 2,063,790
Gross Unrealized Gains 9 13,626
Gross Unrealized Losses 269,174 32,903
Fair Value 1,740,936 2,044,513
U.S. Treasuries    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 191,108 160,291
Gross Unrealized Gains 0 85
Gross Unrealized Losses 24,504 2,542
Fair Value 166,604 157,834
Obligations of U.S. Government sponsored entities    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 828,313 843,218
Gross Unrealized Gains 0 4,527
Gross Unrealized Losses 98,285 15,372
Fair Value 730,028 832,373
Obligations of U.S. states and political subdivisions    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 95,162 102,177
Gross Unrealized Gains 0 2,092
Gross Unrealized Losses 12,101 100
Fair Value 83,061 104,169
U.S. Government agencies    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 61,553 76,502
Gross Unrealized Gains 9 1,187
Gross Unrealized Losses 6,503 532
Fair Value 55,059 77,157
U.S. Government sponsored entities    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 831,465 879,102
Gross Unrealized Gains 0 5,735
Gross Unrealized Losses 127,651 14,281
Fair Value 703,814 870,556
U.S. corporate debt securities    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 2,500 2,500
Gross Unrealized Gains 0 0
Gross Unrealized Losses 130 76
Fair Value $ 2,370 $ 2,424