CAPITAL REQUIREMENTS AND RESTRICTIONS ON RETAINED EARNINGS - Summary Of Capital Adequacy Requirements (Details) $ in Thousands	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Consolidated
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital (to Risk Weighted Assets), Actual Amount	$ 870,390	$ 821,008
Total Capital (to Risk Weighted Assets), Actual Ratio	0.1547	0.1507
Tier I Capital (to Risk Weighted Assets), Actual Amount	$ 799,929	$ 752,751
Tier I Capital (to Risk Weighted Assets), Actual Ratio	0.1421	0.1382
Common Equity Tier 1 (CET1), Actual Amount	$ 799,929	$ 752,751
Common Equity Tier 1 (CET1), Actual Ratio	14.21%	13.82%
Tier I Capital (to Average Assets), Actual Amount	$ 799,929	$ 752,751
Tier I Capital (to Average Assets), Actual Ratio	0.1182	0.1150
Total Capital (to Risk Weighted Assets), Minimum Required For Capital Adequacy Purposes Amount	$ 450,211	$ 435,786
Total Capital (to Risk Weighted Assets), Minimum Required For Capital Adequacy Purposes Ratio	0.0800	0.0800
Tier I Capital (to Risk Weighted Assets), Minimum Required For Capital Adequacy Purposes Amount	$ 337,658	$ 326,840
Tier I Capital (to Risk Weighted Assets), Minimum Required For Capital Adequacy Purposes Ratio	0.0600	0.0600
Common Equity Tier 1 (CET1), Minimum Required For Capital Adequacy Purposes Amount	$ 253,243	$ 245,130
Common Equity Tier 1 (CET1), Minimum Required For Capital Adequacy Purposes Ratio	4.50%	4.50%
Tier I Capital (to Average Assets), Minimum Required For Capital Adequacy Purposes Amount	$ 270,636	$ 261,859
Tier I Capital (to Average Assets), Minimum Required For Capital Adequacy Purposes Ratio	0.0400	0.0400
Excess Capital, For Capital Adequacy Purposes Plus Capital Conservation Buffer Amount	$ 590,901	$ 571,969
Tier I Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Plus Capital Conservation Buffer Amount	478,349	463,023
Common Equity Tier 1 (CET1), For Capital Adequacy Purposes Plus Capital Conservation Buffer Amount	393,934	381,313
Tier I Capital (to Average Assets), For Capital Adequacy Purposes Plus Capital Conservation Buffer Amount	270,636	261,859
Bank
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital (to Risk Weighted Assets), Actual Amount	$ 852,405	$ 801,044
Total Capital (to Risk Weighted Assets), Actual Ratio	0.1516	0.1474
Tier I Capital (to Risk Weighted Assets), Actual Amount	$ 781,999	$ 732,966
Tier I Capital (to Risk Weighted Assets), Actual Ratio	0.1391	0.1349
Common Equity Tier 1 (CET1), Actual Amount	$ 781,999	$ 732,966
Common Equity Tier 1 (CET1), Actual Ratio	13.91%	13.49%
Tier I Capital (to Average Assets), Actual Amount	$ 781,999	$ 732,966
Tier I Capital (to Average Assets), Actual Ratio	0.1158	0.1122
Total Capital (to Risk Weighted Assets), Minimum Required For Capital Adequacy Purposes Amount	$ 449,894	$ 434,758
Total Capital (to Risk Weighted Assets), Minimum Required For Capital Adequacy Purposes Ratio	0.0800	0.0800
Tier I Capital (to Risk Weighted Assets), Minimum Required For Capital Adequacy Purposes Amount	$ 337,420	$ 326,069
Tier I Capital (to Risk Weighted Assets), Minimum Required For Capital Adequacy Purposes Ratio	0.0600	0.0600
Common Equity Tier 1 (CET1), Minimum Required For Capital Adequacy Purposes Amount	$ 253,065	$ 244,551
Common Equity Tier 1 (CET1), Minimum Required For Capital Adequacy Purposes Ratio	4.50%	4.50%
Tier I Capital (to Average Assets), Minimum Required For Capital Adequacy Purposes Amount	$ 270,041	$ 261,222
Tier I Capital (to Average Assets), Minimum Required For Capital Adequacy Purposes Ratio	0.0400	0.0400
Excess Capital, For Capital Adequacy Purposes Plus Capital Conservation Buffer Amount	$ 590,486	$ 570,620
Excess Capital to Risk Weighted Assets, For Capital Adequacy Purposes Plus Capital Conservation Buffer Ratio	0.1050	0.1050
Tier I Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Plus Capital Conservation Buffer Amount	$ 478,012	$ 461,930
Tier I Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Plus Capital Conservation Buffer Ratio	0.0850	0.0850
Common Equity Tier 1 (CET1), For Capital Adequacy Purposes Plus Capital Conservation Buffer Amount	$ 393,657	$ 380,413
Common Equity Tier 1 (CET1), For Capital Adequacy Purposes Plus Capital Conservation Buffer Ratio	7.00%	7.00%
Tier I Capital (to Average Assets), For Capital Adequacy Purposes Plus Capital Conservation Buffer Amount	$ 270,041	$ 261,222
Tier I Capital (to Average Assets), For Capital Adequacy Purposes Plus Capital Conservation Buffer Ratio	0.0400	0.0400
Total Capital (to Risk Weighted Assets), Minimum Required to Be Well Capitalized Under Prompt Corrective Action Regulations Amount	$ 562,367	$ 543,448
Total Capital (to Risk Weighted Assets), Minimum Required to Be Well Capitalized Under Prompt Corrective Action Regulations Ratio	0.1000	0.1000
Tier I Capital (to Risk Weighted Assets), Minimum Required to Be Well Capitalized Under Prompt Corrective Action Regulations Amount	$ 449,894	$ 434,758
Tier I Capital (to Risk Weighted Assets), Minimum Required to Be Well Capitalized Under Prompt Corrective Action Regulations Ratio	0.0800	0.0800
Common Equity Tier 1 (CET1), Minimum Required to Be Well Capitalized Under Prompt Corrective Action Regulations Amount	$ 365,539	$ 353,241
Common Equity Tier 1 (CET1), Minimum Required to Be Well Capitalized Under Prompt Corrective Action Regulations Ratio	6.50%	6.50%
Tier I Capital (to Average Assets), Minimum Required to Be Well Capitalized Under Prompt Corrective Action Regulations Amount	$ 337,551	$ 326,527
Tier I Capital (to Average Assets), Minimum Required to Be Well Capitalized Under Prompt Corrective Action Regulations Ratio	0.0500	0.0500