INVESTMENT SECURITIES - Investments classified by contractual maturity date (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Available-for-Sale - Amortized Cost
After three through four years	$ 245
After four through five years	944
After five through fifteen years	9,715
After fifteen years	48,369
Securities not due on a single maturity date	472,947
Available-for-sale securities, Amortized Cost, Total	532,220	$ 553,214
Available-for-Sale - Fair Value
After three through four years	245
After four through five years	929
After five through fifteen years	9,087
After fifteen years	42,129
Securities not due on a single maturity date	395,558
Available-for-sale securities, Fair Value, Total	447,948	490,592
Held-to-Maturity - Amortized Carrying Value
After five through fifteen years	3,249
After fifteen years	2,949
Securities not due on a single maturity date	190,518
Amortized Carrying Value	196,716	202,495
Held-to-Maturity - Fair Value
After five through fifteen years	2,699
After fifteen years	2,408
Securities not due on a single maturity date	160,983
Total fair value of held-to-maturity	$ 166,090	$ 177,765

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).

No definition available.