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Investment Securities - Summary of Credit Quality Indicators of Held-to-maturity Investment Securities (Details) - USD ($) $ in Thousands | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Schedule of Held-to-maturity Securities [Line Items] |  |
Held-to-maturity securities | $ 554,686 | $ 585,052
AA+ |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Held-to-maturity securities | 554,686 |
AAA |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Held-to-maturity securities |  | 585,052
U.S. Treasury Securities |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Held-to-maturity securities | 49,487 | 49,338
U.S. Treasury Securities | AA+ |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Held-to-maturity securities | 49,487 |
U.S. Treasury Securities | AAA |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Held-to-maturity securities |  | 49,338
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 | 279,941 | 299,337
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 | 279,941 |
Residential mortgage pass-through securities issued or guaranteed by U.S. government agencies or sponsored enterprises | AAA |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Held-to-maturity securities |  | 299,337
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 | 225,258 | 236,377
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 | $ 225,258 |
Other residential MBS issued or guaranteed by U.S. government agencies or sponsored enterprises | AAA |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Held-to-maturity securities |  | $ 236,377

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