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INVESTMENT SECURITIES - Investments Classified by Contractual Maturity Date (Details) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Available-for-Sale - Amortized cost |  |
After four through five years | $ 2,292 |
After five through fifteen years | 13,081 |
After fifteen years | 25,831 |
Securities not due on a single maturity date | 434,510 |
Available-for-sale Securities, Amortized Cost Basis, Total | 475,714 |
Available-for-Sale - Fair Value |  |
After four through five years | 2,318 |
After five through fifteen years | 13,208 |
After fifteen years | 25,474 |
Securities not due on a single maturity date | 420,375 |
Available-for-sale Securities, Total | 461,375 | $ 501,032
Held-to-Maturity - Amortized Carrying Value |  |
After five through fifteen years | 2,575 |
After fifteen years | 3,681 |
Securities not due on a single maturity date | 221,185 |
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss, Total | 227,441 |
Held-to-Maturity - Fair Value |  |
After five through fifteen years | 2,440 |
After fifteen years | 3,553 |
Securities not due on a single maturity date | 214,195 |
Held-to-maturity Fair Value, Total | $ 220,188 |

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- Definition Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing after year fifteen. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References No definition available. + Details
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- Definition Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in year five through year fifteen. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References No definition available. + Details
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- Definition Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in fifth year following fourth year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References No definition available. + Details
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- Definition Fair Value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in fifth year following fourth year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References No definition available. + Details
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- Definition Amount, after allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity) with single maturity date and allocated without single maturity date, maturing After fifteen years rolling fiscal year following current statement of financial position date. For interim and annual periods when interim period is reported on rolling approach. + References No definition available. + Details
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