INVESTMENT SECURITIES - Investments classified by contractual maturity date (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Available-for-Sale - Amortized Cost
After one through two years	$ 1,029
After five through fifteen years	26,290
After fifteen years	25,905
Securities not due on a single maturity date	499,237
Available-for-sale securities, Amortized Cost, Total	552,461	$ 560,430
Available-for-Sale - Fair Value
After one through two years	1,037
After five through fifteen years	25,243
After fifteen years	24,534
Securities not due on a single maturity date	463,032
Available-for-Sale, Fair Value, Total	513,846	523,831
Held-to-Maturity - Amortized Carrying Value
After five through fifteen years	6,105
Securities not due on a single maturity date	171,489
Held-to-Maturity, Amortized Carrying Value, Total	177,594	179,200
Held-to-Maturity - Fair Value
After five through fifteen years	5,590
Securities not due on a single maturity date	154,930
Held-to-maturity, Fair Value, Total	$ 160,520	$ 162,629

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.