INVESTMENT SECURITIES - Amortized Cost and Fair Value of Investment Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Sep. 01, 2022
Amortized Cost
Due in one year or less	$ 715
Due after one year through five years	15,714
Due after five years through ten years	102,474
Due after ten years	89,490
Total excluding mortgage-backed securities	208,393
Mortgage-backed securities	246,901
Amortized Cost	455,294	$ 490,206
Fair Value
Due in one year or less	713
Due after one year through five years	14,697
Due after five years through ten years	88,639
Due after ten years	81,644
Total excluding mortgage-backed securities	185,693
Mortgage-backed securities	221,689
Fair Value	407,382	432,553
Amortized Cost
Due in one year or less	3,937
Due after one year through five years	94,194
Due after five years through ten years	76,529
Due after ten years	71,613
Total amortized cost	246,273
Mortgage-backed securities	202,758
Amortized Cost	449,031	465,858
Fair Value
Due in one year or less	3,882
Due after one year through five years	90,873
Due after five years through ten years	68,260
Due after ten years	65,119
Total fair value	228,134
Mortgage-backed securities	177,442
Fair Value	$ 405,576	$ 411,264	$ 477,000