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INVESTMENT SECURITIES (Schedule of Securities with Unrealized Losses) (Details) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2023 USD ($) item | Dec. 31, 2022 USD ($) item
Held-to-maturity Securities |  |
Number of securities of one issuer | item | 0 | 0
Impairment loss | $ 0 | $ 0
Available-for-sale Securities. |  |
Available-for-sale Securities |  |
Less than 12 Months, Estimated Fair Value | 58,178 | 35,528
Less than 12 Months, Unrealized/Unrecognized Losses | (2,638) | (2,379)
12 months or more, Estimated Fair Value | 371,672 | 387,125
12 months or more, Unrealized/Unrecognized Losses | (97,608) | (86,828)
Total, Estimated Fair Value | 429,850 | 422,653
Total, Unrealized/Unrecognized Losses | (100,246) | (89,207)
Held-to-maturity Securities |  |
Held-to-maturity Securities |  |
Less than 12 Months, Estimated Fair Value | 0 | 194,848
Less than 12 Months, Unrealized/Unrecognized Losses | 0 | (23,599)
12 months or more, Estimated Fair Value | 396,258 | 242,442
12 months or more, Unrealized/Unrecognized Losses | (82,628) | (49,536)
Total, Estimated Fair Value | 396,258 | 437,290
Total, Unrealized Losses | (82,628) | (73,135)
U.S. Government agency securities | Available-for-sale Securities. |  |
Available-for-sale Securities |  |
Less than 12 Months, Estimated Fair Value | 0 | 0
Less than 12 Months, Unrealized/Unrecognized Losses | 0 | 0
12 months or more, Estimated Fair Value | 59,672 | 59,372
12 months or more, Unrealized/Unrecognized Losses | (8,325) | (8,624)
Total, Estimated Fair Value | 59,672 | 59,372
Total, Unrealized/Unrecognized Losses | (8,325) | (8,624)
U.S. State and Municipal securities | Available-for-sale Securities. |  |
Available-for-sale Securities |  |
Less than 12 Months, Estimated Fair Value | 0 | 2,546
Less than 12 Months, Unrealized/Unrecognized Losses | 0 | (527)
12 months or more, Estimated Fair Value | 8,958 | 6,666
12 months or more, Unrealized/Unrecognized Losses | (2,577) | (1,910)
Total, Estimated Fair Value | 8,958 | 9,212
Total, Unrealized/Unrecognized Losses | (2,577) | (2,437)
U.S. State and Municipal securities | Held-to-maturity Securities |  |
Held-to-maturity Securities |  |
Less than 12 Months, Estimated Fair Value | 0 | 13,205
Less than 12 Months, Unrealized/Unrecognized Losses | 0 | (2,609)
12 months or more, Estimated Fair Value | 12,680 |
12 months or more, Unrealized/Unrecognized Losses | (2,951) |
Total, Estimated Fair Value | 12,680 | 13,205
Total, Unrealized Losses | (2,951) | (2,609)
Residential MBS | Available-for-sale Securities. |  |
Available-for-sale Securities |  |
Less than 12 Months, Estimated Fair Value | 37,991 | 19,576
Less than 12 Months, Unrealized/Unrecognized Losses | (1,520) | (1,654)
12 months or more, Estimated Fair Value | 286,871 | 305,936
12 months or more, Unrealized/Unrecognized Losses | (83,806) | (74,075)
Total, Estimated Fair Value | 324,862 | 325,512
Total, Unrealized/Unrecognized Losses | (85,326) | (75,729)
Residential MBS | Held-to-maturity Securities |  |
Held-to-maturity Securities |  |
Less than 12 Months, Estimated Fair Value | 0 | 162,960
Less than 12 Months, Unrealized/Unrecognized Losses | 0 | (19,625)
12 months or more, Estimated Fair Value | 348,982 | 226,661
12 months or more, Unrealized/Unrecognized Losses | (76,294) | (47,402)
Total, Estimated Fair Value | 348,982 | 389,621
Total, Unrealized Losses | (76,294) | (67,027)
Commercial MBS | Available-for-sale Securities. |  |
Available-for-sale Securities |  |
Less than 12 Months, Estimated Fair Value | 20,187 | 13,406
Less than 12 Months, Unrealized/Unrecognized Losses | (1,118) | (198)
12 months or more, Estimated Fair Value | 12,893 | 11,386
12 months or more, Unrealized/Unrecognized Losses | (2,780) | (2,031)
Total, Estimated Fair Value | 33,080 | 24,792
Total, Unrealized/Unrecognized Losses | (3,898) | (2,229)
Commercial MBS | Held-to-maturity Securities |  |
Held-to-maturity Securities |  |
Less than 12 Months, Estimated Fair Value | 0 | 0
Less than 12 Months, Unrealized/Unrecognized Losses | 0 | 0
12 months or more, Estimated Fair Value | 6,677 | 6,835
12 months or more, Unrealized/Unrecognized Losses | (1,418) | (1,276)
Total, Estimated Fair Value | 6,677 | 6,835
Total, Unrealized Losses | (1,418) | (1,276)
Asset-backed Securities | Available-for-sale Securities. |  |
Available-for-sale Securities |  |
Less than 12 Months, Estimated Fair Value | 0 | 0
Less than 12 Months, Unrealized/Unrecognized Losses | 0 | 0
12 months or more, Estimated Fair Value | 3,278 | 3,765
12 months or more, Unrealized/Unrecognized Losses | (120) | (188)
Total, Estimated Fair Value | 3,278 | 3,765
Total, Unrealized/Unrecognized Losses | (120) | (188)
US Treasury Securities | Held-to-maturity Securities |  |
Held-to-maturity Securities |  |
Less than 12 Months, Estimated Fair Value | 0 | 18,683
Less than 12 Months, Unrealized/Unrecognized Losses | 0 | (1,365)
12 months or more, Estimated Fair Value | 27,919 | 8,946
12 months or more, Unrealized/Unrecognized Losses | (1,965) | (858)
Total, Estimated Fair Value | 27,919 | 27,629
Total, Unrealized Losses | $ (1,965) | $ (2,223)

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