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Investment Securities - Summary of Credit Quality Indicators of Held-to-maturity Investment Securities (Details) - USD ($) $ in Thousands | Mar. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Schedule of Held-to-maturity Securities [Line Items] |  |
Held-to-maturity securities | $ 706,912 | $ 533,108
AA+ |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Held-to-maturity securities | 706,912 | 533,108
U.S. Treasury securities |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Held-to-maturity securities | 49,715 | 49,639
U.S. Treasury securities | AA+ |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Held-to-maturity securities | 49,715 | 49,639
Residential mortgage pass-through securities issued or guaranteed by U.S. government agencies or sponsored enterprises |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Held-to-maturity securities | 262,594 | 271,105
Residential mortgage pass-through securities issued or guaranteed by U.S. government agencies or sponsored enterprises | AA+ |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Held-to-maturity securities | 262,594 | 271,105
Other residential MBS issued or guaranteed by U.S. government agencies or sponsored enterprises |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Held-to-maturity securities | 394,603 | 212,364
Other residential MBS issued or guaranteed by U.S. government agencies or sponsored enterprises | AA+ |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Held-to-maturity securities | $ 394,603 | $ 212,364

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