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Securities Available for Sale and Held to Maturity - Contractual Maturities of Available for Sale and Held to Maturity Securities (Details) - USD ($) $ in Thousands | Jun. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Securities Available for Sale, Amortized Cost [Abstract] |  |
Due in one year or less | $ 33,868 |
Due after one year through five years | 49,590 |
Due after five years through ten years | 195,861 |
Total amortized cost, before mortgage-backed securities | 279,319 |
Mortgage-backed securities | 1,483,185 |
Securities Available for Sale, Amortized Cost | 1,762,504 | $ 1,719,537
Securities Available for Sale, Estimated Fair Value [Abstract] |  |
Due in one year or less | 34,004 |
Due after one year through five years | 50,196 |
Due after five years through ten years | 197,279 |
Total fair value, before mortgage-backed securities | 281,479 |
Mortgage-backed securities | 1,500,613 |
Total | 1,782,092 | 1,692,534
Securities Held to Maturity, Amortized Cost [Abstract] |  |
Due in one year or less | 0 |
Due after one year through five years | 30,226 |
Due after five years through ten years | 0 |
Total amortized cost, before mortgage-backed securities | 30,226 |
Mortgage-backed securities | 1,260,346 |
Securities Held to Maturity, Amortized Cost | 1,290,572 | 1,335,385
Securities Held to Maturity, Estimated Fair Value [Abstract] |  |
Due in one year or less | 0 |
Due after one year through five years | 30,291 |
Due after five years through ten years | 0 |
Total fair value, before mortgage-backed securities | 30,291 |
Mortgage-backed securities | 1,217,391 |
Total | $ 1,247,682 | $ 1,259,107

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