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Investment Securities - Maturities (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
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Investments, Debt and Equity Securities [Abstract] |  |
Held to Maturity, Amortized Cost, Within one year | $ 101 | $ 246
Held to Maturity, Amortized Cost, After one but within five years | 25,666 | 7,550
Held to Maturity, Amortized Cost, After five years through ten years | 182,604 | 52,113
Held to Maturity, Amortized Cost, After ten years | 133,851 | 49,127
Held to Maturity, Amortized Cost, Total | 342,222 | 109,036
Held to Maturity, Fair Value, Within one year | 103 | 250
Held to Maturity, Fair Value, After one but within five years | 26,559 | 7,961
Held to Maturity, Fair Value, After five years through ten years | 182,303 | 55,872
Held to Maturity, Fair Value, After ten years | 133,790 | 51,102
Held-to-Maturity, Fair Value, Total | 342,755 | 115,185
Available for Sale, Amortized Cost, Within one year | 10,785 | 11,530
Available for Sale, Amortized Cost, After one but within five years | 219,474 | 59,028
Available For Sale, Amortized Cost, After five years through ten years | 299,937 | 144,908
Available for Sale, Amortized Cost, After ten years | 639,324 | 157,572
Amortized Cost | 1,169,520 | 373,038
Available for Sale, Fair Value, Within one year | 10,841 | 11,687
Available for Sale, Fair Value, After one but within five years | 219,957 | 62,397
Available for Sale, Fair Value, After five years through ten years | 300,187 | 154,089
Available for Sale, Fair Value, After ten years | 636,583 | 164,178
Available for Sale, Fair Value, Total | $ 1,167,568 | $ 392,351

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