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Investment Securities - Summary of Amortized Cost and Approximate Fair Value of Investment Securities (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Schedule of Held-to-Maturity Securities [Line Items] |  |
Amortized Cost | $ 991,937 | $ 1,103,170
Allowance for Credit Losses | 0 | 0
Net Carrying Value | 991,937 | 1,103,170
Gross Unrealized Gains | 2,349 | 202
Gross Unrealized Losses | (59,609) | (56,933)
Fair Value | 934,677 | 1,046,439
Accrued interest on held-to-maturity debt securities | $ 2,400 | $ 2,700
Debt Securities, Held-to-Maturity, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration] | Accrued interest receivable | Accrued interest receivable
Asset-backed securities |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Amortized Cost | $ 471,996 | $ 575,990
Allowance for Credit Losses | 0 | 0
Net Carrying Value |  | 575,990
Gross Unrealized Gains | 1,775 | 202
Gross Unrealized Losses | (401) | (2,064)
Fair Value |  | 574,128
Agency-guaranteed residential mortgage-backed securities |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Amortized Cost | 6,880 | 7,039
Allowance for Credit Losses | 0 | 0
Net Carrying Value | 6,880 | 7,039
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (940) | (649)
Fair Value | 5,940 | 6,390
Agency-guaranteed commercial mortgage-backed securities |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Amortized Cost | 1,770 | 1,850
Allowance for Credit Losses | 0 | 0
Net Carrying Value | 1,770 | 1,850
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (146) | (134)
Fair Value | 1,624 | 1,716
Agency-guaranteed residential collateralized mortgage obligations |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Amortized Cost | 169,754 | 186,636
Allowance for Credit Losses | 0 | 0
Net Carrying Value | 169,754 | 186,636
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (21,984) | (19,049)
Fair Value | 147,770 | 167,587
Agency-guaranteed commercial collateralized mortgage obligations |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Amortized Cost | 158,320 | 146,765
Allowance for Credit Losses | 0 | 0
Net Carrying Value | 158,320 | 146,765
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (22,689) | (23,178)
Fair Value | 135,631 | 123,587
Private label collateralized mortgage obligations |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Amortized Cost | 183,217 | 184,890
Allowance for Credit Losses | 0 | 0
Net Carrying Value | 183,217 | 184,890
Gross Unrealized Gains | 574 | 0
Gross Unrealized Losses | (13,449) | (11,859)
Fair Value | $ 170,342 | $ 173,031

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