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Securities - Schedule of Available-for-Sales Securities (Details) - USD ($)
$ in Thousands
Jun. 30, 2023
Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost $ 1,688,051 $ 1,831,791
Gross Unrealized Gains 10 20
Gross Unrealized Losses 220,058 236,844
Fair Value 1,468,003 1,594,967
U.S. Treasuries    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 190,275 190,170
Gross Unrealized Gains 0 0
Gross Unrealized Losses 22,181 22,919
Fair Value 168,094 167,251
Obligations of U.S. Government sponsored entities    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 592,694 681,192
Gross Unrealized Gains 0 0
Gross Unrealized Losses 69,151 80,025
Fair Value 523,543 601,167
Obligations of U.S. states and political subdivisions    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 90,330 93,599
Gross Unrealized Gains 1 8
Gross Unrealized Losses 8,284 8,326
Fair Value 82,047 85,281
U.S. Government agencies    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 54,852 58,727
Gross Unrealized Gains 9 12
Gross Unrealized Losses 5,919 6,071
Fair Value 48,942 52,668
U.S. Government sponsored entities    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 757,400 805,603
Gross Unrealized Gains 0 0
Gross Unrealized Losses 114,265 119,381
Fair Value 643,135 686,222
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 258 122
Fair Value $ 2,242 $ 2,378