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Investment Securities - Summary of Unrealized Losses (Details) - USD ($)
$ in Thousands
Sep. 30, 2024
Dec. 31, 2023
Schedule of Available-for-sale Securities [Line Items]    
Less than 12 months, Fair Value $ 16,334 $ 147
Less than 12 months, Unrealized losses (21) (1)
12 months or more, Fair Value 554,442 625,070
12 months or more, Unrealized Loss (82,650) (99,046)
Total, Fair Value 570,776 625,217
Total, Unrealized losses (82,671) (99,047)
U.S. Treasury securities    
Schedule of Available-for-sale Securities [Line Items]    
12 months or more, Fair Value 49,190 73,044
12 months or more, Unrealized Loss (567) (1,464)
Total, Fair Value 49,190 73,044
Total, Unrealized losses (567) (1,464)
Residential mortgage pass-through securities issued or guaranteed by U.S. government agencies or sponsored enterprises    
Schedule of Available-for-sale Securities [Line Items]    
Less than 12 months, Fair Value   9
12 months or more, Fair Value 181,541 199,000
12 months or more, Unrealized Loss (26,358) (31,512)
Total, Fair Value 181,541 199,009
Total, Unrealized losses (26,358) (31,512)
Other residential MBS issued or guaranteed by U.S. government agencies or sponsored enterprises    
Schedule of Available-for-sale Securities [Line Items]    
Less than 12 months, Fair Value 16,334 138
Less than 12 months, Unrealized losses (21) (1)
12 months or more, Fair Value 321,668 351,104
12 months or more, Unrealized Loss (55,687) (65,912)
Total, Fair Value 338,002 351,242
Total, Unrealized losses (55,708) (65,913)
Municipal securities    
Schedule of Available-for-sale Securities [Line Items]    
12 months or more, Fair Value 80 79
12 months or more, Unrealized Loss   (1)
Total, Fair Value 80 79
Total, Unrealized losses   (1)
Corporate debt    
Schedule of Available-for-sale Securities [Line Items]    
12 months or more, Fair Value 1,963 1,843
12 months or more, Unrealized Loss (38) (157)
Total, Fair Value 1,963 1,843
Total, Unrealized losses $ (38) $ (157)