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Securities - Contractual Maturity Information for Securities Held to Maturity (Detail) - USD ($) $ in Thousands | Jun. 30, 2022 | Dec. 31, 2021
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Investments Debt And Equity Securities [Abstract] |  |
Due in 1 year or less, Amortized Cost | $ 55,797 |
Due after 1 year through 5 years, Amortized Cost | 341,617 |
Due after 5 years through 10 years, Amortized Cost | 720,150 |
Due after 10 years, Amortized Cost | 1,503,163 |
Total, Amortized cost | 2,620,727 |
Mortgage-backed securities, Amortized cost | 3,088,814 |
Amortized Cost | 5,709,541 | $ 1,480,416
Due in 1 year or less, Fair Value | 55,397 |
Due after 1 year through 5 years, Fair Value | 333,267 |
Due after 5 years through 10 years, Fair Value | 654,860 |
Due after 10 years, Fair Value | 1,325,912 |
Total, Fair value | 2,369,436 |
Mortgage-backed securities, Fair value | 2,876,015 |
Total securities held to maturity, Fair value | $ 5,245,451 | $ 1,442,391

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