SECURITIES - Amortized cost and estimated fair values of securities by contractual maturities (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Available for Sale - Amortized Cost
Amortized cost, 1 year or less	$ 70,689	$ 2,070
Amortized cost, 1 year through 5 years	39,754	7,091
Amortized cost, 5 years through 10 years	53,804	29,673
Amortized cost, After 10 years	435,566	382,359
Available-for-sale Securities, Amortized Cost Basis, Total	599,813	421,193
Available for Sale - Fair Value
Estimated fair value, 1 year or less	69,116	2,056
Estimated fair value, 1 year through 5 years	37,731	7,066
Estimated fair value, 5 years through 10 years	49,567	30,360
Estimated fair value, After 10 years	354,868	385,564
Available-for-sale Securities, Total	511,282	425,046
Equity securities - Amortized Cost
Equity securities, Amortized Cost	1,201
Equity securities - Fair Value
Equity securities, Fair Value	1,045
State and municipal securities
Available for Sale - Amortized Cost
Amortized cost, 1 year or less		881
Amortized cost, 1 year through 5 years	506
Amortized cost, 5 years through 10 years	21,400	12,339
Amortized cost, After 10 years	153,857	155,321
Available-for-sale Securities, Amortized Cost Basis, Total	175,763	168,541
Available for Sale - Fair Value
Estimated fair value, 1 year or less		883
Estimated fair value, 1 year through 5 years	484
Estimated fair value, 5 years through 10 years	19,797	12,905
Estimated fair value, After 10 years	114,817	158,812
Available-for-sale Securities, Total	135,098	172,600
U.S. Treasury securities
Available for Sale - Amortized Cost
Amortized cost, 1 year or less	69,486
Amortized cost, 1 year through 5 years	38,655	6,138
Amortized cost, 5 years through 10 years	2,904	5,750
Available-for-sale Securities, Amortized Cost Basis, Total	111,045	11,888
Available for Sale - Fair Value
Estimated fair value, 1 year or less	68,069
Estimated fair value, 1 year through 5 years	36,672	6,072
Estimated fair value, 5 years through 10 years	2,518	5,725
Available-for-sale Securities, Total	107,259	11,797
Callable debentures
Available for Sale - Amortized Cost
Amortized cost, 5 years through 10 years	3,000	3,000
Available-for-sale Securities, Amortized Cost Basis, Total	3,000	3,000
Available for Sale - Fair Value
Estimated fair value, 5 years through 10 years	2,564	2,973
Available-for-sale Securities, Total	2,564	2,973
Collateralized mortgage obligations
Available for Sale - Amortized Cost
Amortized cost, 5 years through 10 years	2,487	4,528
Amortized cost, After 10 years	94,820	58,601
Available-for-sale Securities, Amortized Cost Basis, Total	97,307	63,129
Available for Sale - Fair Value
Estimated fair value, 5 years through 10 years	2,408	4,591
Estimated fair value, After 10 years	81,990	57,791
Available-for-sale Securities, Total	84,398	62,382
Mortgage-backed securities
Available for Sale - Amortized Cost
Amortized cost, 1 year or less	2
Amortized cost, 1 year through 5 years	593	953
Amortized cost, 5 years through 10 years	24,013	4,056
Amortized cost, After 10 years	186,889	168,437
Available-for-sale Securities, Amortized Cost Basis, Total	211,497	173,446
Available for Sale - Fair Value
Estimated fair value, 1 year or less	2
Estimated fair value, 1 year through 5 years	575	994
Estimated fair value, 5 years through 10 years	22,280	4,166
Estimated fair value, After 10 years	158,061	168,961
Available-for-sale Securities, Total	180,918	174,121
Equity securities
Available for Sale - Fair Value
Estimated fair value, 1 year or less		1,173
Equity securities - Amortized Cost
Equity securities, Amortized Cost	1,201	1,189
Equity securities - Fair Value
Equity securities, Fair Value	$ 1,045	$ 1,173

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