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Investment Securities - Summary of Unrealized Losses (Details) - USD ($)
$ in Thousands
Sep. 30, 2023
Dec. 31, 2022
Schedule of Available-for-sale Securities [Line Items]    
Less than 12 months, Fair Value $ 152 $ 353,658
Less than 12 months, Unrealized losses (5) (32,220)
12 months or more, Fair Value 616,587 350,749
12 months or more, Unrealized Loss (128,042) (81,254)
Total, Fair Value 616,739 704,407
Total, Unrealized losses (128,047) (113,474)
U.S. Treasury Securities [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Less than 12 months, Fair Value   71,388
Less than 12 months, Unrealized losses   (2,643)
12 months or more, Fair Value 71,862  
12 months or more, Unrealized Loss (2,524)  
Total, Fair Value 71,862 71,388
Total, Unrealized losses (2,524) (2,643)
Residential Mortgage Pass-Through Securities Issued or Guaranteed by U.S. Government Agencies or Sponsored Enterprises [Member].    
Schedule of Available-for-sale Securities [Line Items]    
Less than 12 months, Fair Value 16 83,748
Less than 12 months, Unrealized losses (1) (6,686)
12 months or more, Fair Value 193,918 141,272
12 months or more, Unrealized Loss (43,457) (31,123)
Total, Fair Value 193,934 225,020
Total, Unrealized losses (43,458) (37,809)
Other Residential MBS Issued or Guaranteed by U.S. Government Agencies or Sponsored Enterprises [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Less than 12 months, Fair Value 136 196,449
Less than 12 months, Unrealized losses (4) (22,809)
12 months or more, Fair Value 348,806 209,477
12 months or more, Unrealized Loss (81,907) (50,131)
Total, Fair Value 348,942 405,926
Total, Unrealized losses (81,911) (72,940)
Municipal Securities [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Less than 12 months, Fair Value   153
Less than 12 months, Unrealized losses   (2)
12 months or more, Fair Value 152  
12 months or more, Unrealized Loss (3)  
Total, Fair Value 152 153
Total, Unrealized losses (3) (2)
Corporate Debt Securities [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Less than 12 months, Fair Value   1,920
Less than 12 months, Unrealized losses   (80)
12 months or more, Fair Value 1,849  
12 months or more, Unrealized Loss (151)  
Total, Fair Value 1,849 1,920
Total, Unrealized losses $ (151) $ (80)