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Securities - Schedule of Amortized Cost of Debt Securities Held-to-Maturity, Aggregated by Credit Quality Indicator (Details)
$ in Thousands
Sep. 30, 2024
USD ($)
Securities Financing Transaction [Line Items]  
Amortized cost of debt securities held-to-maturity $ 290,997
Investment Grade  
Securities Financing Transaction [Line Items]  
Amortized cost of debt securities held-to-maturity 276,167
Non-Investment Grade/Non-rated  
Securities Financing Transaction [Line Items]  
Amortized cost of debt securities held-to-maturity 14,830
State and municipal debt obligations  
Securities Financing Transaction [Line Items]  
Amortized cost of debt securities held-to-maturity 203,822
State and municipal debt obligations | Investment Grade  
Securities Financing Transaction [Line Items]  
Amortized cost of debt securities held-to-maturity 202,983
State and municipal debt obligations | Non-Investment Grade/Non-rated  
Securities Financing Transaction [Line Items]  
Amortized cost of debt securities held-to-maturity 839
Corporate debt securities  
Securities Financing Transaction [Line Items]  
Amortized cost of debt securities held-to-maturity 66,721
Corporate debt securities | Investment Grade  
Securities Financing Transaction [Line Items]  
Amortized cost of debt securities held-to-maturity 52,730
Corporate debt securities | Non-Investment Grade/Non-rated  
Securities Financing Transaction [Line Items]  
Amortized cost of debt securities held-to-maturity 13,991
Non-agency commercial MBS  
Securities Financing Transaction [Line Items]  
Amortized cost of debt securities held-to-maturity 20,454
Non-agency commercial MBS | Investment Grade  
Securities Financing Transaction [Line Items]  
Amortized cost of debt securities held-to-maturity 20,454
Non-agency commercial MBS | Non-Investment Grade/Non-rated  
Securities Financing Transaction [Line Items]  
Amortized cost of debt securities held-to-maturity $ 0