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Investment Securities and Certificates of Deposit - Scheduled Maturities of Available-for-Sale Debt Securities (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
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Investments, Debt and Equity Securities [Abstract] |  |
Due within one year, amortized cost | $ 743,198 | $ 800,710
Due after one year through five years, amortized cost | 980 | 1,942
Debt securities, available-for-sale, amortized cost | 744,178 | 802,652
Due within one year, fair value | 743,338 | 805,190
Due after one year through five years, fair value | 977 | 1,945
Total, fair value | $ 744,315 | $ 807,135

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